Article
Chemistry, Inorganic & Nuclear
Yumeng Liu, Weiwei Jie, Fen Liu, Qian Liu, Mei Qiu, Xia Gong, Jiaqi Hu, Lei Gong
Summary: In this paper, precursors of the coordination polymer Ce(1,3,5-BTC)(H2O)6 with different morphologies were prepared and used to prepare CuO/CeO2 catalysts through impregnation method. The catalysts were characterized using various techniques, and the results showed that the U-CuCeO catalyst had higher CuO dispersion and oxygen vacancy concentration on the surface. The catalyst also exhibited excellent catalytic performance with complete CO conversion at 120 degrees C and a broad temperature window for complete reaction.
SOLID STATE SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Dongren Cai, Bin Chen, Zhongliang Huang, Xiaoli Zeng, Jingran Xiao, Shu-Feng Zhou, Guowu Zhan
Summary: In this study, a series of metal oxide/CeO2 (M/CeO2) nanocomposites were prepared for CO oxidation, demonstrating that Cu/CeO2 exhibited the highest catalytic activity and stability, with 100% O2 selectivity and CO selectivity to CO2 in most conditions. The excellent catalytic performance of Cu/CeO2 was attributed to high oxygen vacancy and CO adsorption capacity, resulting from the electron exchanges of Cu2+/Cu+ and Ce3+/Ce4+ pairs.
Article
Chemistry, Physical
Lei Wang, Huan Peng, Shun-li Shi, Zhuo Hu, Bing-zhen Zhang, Shun-min Ding, Shu-hua Wang, Chao Chen
Summary: By designing and synthesizing a hollow spherical CeO2 supporting Cu-3(BTC)(2) precursor shell to generate CuO/CeO2-S catalyst, the dispersion of active sites can be improved and sintering of active interfaces can be avoided, leading to enhanced catalytic performance for preferential CO oxidation in H-2-rich stream.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Environmental
Bin Chen, Xiaoli Zeng, Yiping Liu, Fulan Xiao, Mingzhen Huang, Kok Bing Tan, Dongren Cai, Jiale Huang, Guowu Zhan
Summary: Metal-organic frameworks (MOFs) have been studied for their thermal decomposition behaviors, particularly in the presence of Pt nanoparticles. The addition of Pt was found to promote the decomposition of Cu-BTC, Co-BTC, and Zn-BTC in air atmosphere, while having a different effect on Ce-BTC. In-situ DRIFTS showed that the introduction of Pt changed the thermal decomposition modes of MOFs. Furthermore, it was observed that Cu-BTC, Co-BTC, and Zn-BTC exhibited improved thermostability in hydrogen atmosphere due to the hydrogenation of the carboxylate on the organic linkers.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Zeyi Guo, Xiuxian Zhao, Guozhu Chen, Wei Zhao, Tongyao Liu, Riming Hu, Xuchuan Jiang
Summary: Controllable synthesis of NH2-Ce-BDC with a second-order magic cube morphology was achieved via H+ mediation in nucleation and growth stages. The concentric diffusion field was identified as a key factor in the formation of magic cube-like structures. The derived CeO2 exhibited unique gullies and grooves, which facilitated the deposition of Pt nanoparticles. The interaction between Pt and mc-CeO2 in mc-Pt/CeO2 was stronger compared to c-Pt/CeO2 derived from cubic Ce-MOFs. Pt2+ ions, hydroxyl oxygen, and oxygen defects were found to contribute to the exemplary catalytic activity of mc-Pt/CeO2 towards HCHO oxidation.
Article
Chemistry, Physical
Zhigao Xue, Cui Yang, Kai Tao, Lei Han
Summary: In this study, a heterostructure of CeO2@(Ni, Co)(3)S-4 was synthesized by assembling one-dimensional nanorods and nanosheets derived from a metal-organic framework (MOF). The CeO2@(Ni, Co)(3)S-4 heterostructure exhibited a high specific capacitance, outstanding rate performance, and excellent cycling stability. The impressive electrochemical performance of the electrode material can be attributed to the large electroactive surface area and rapid electron transfer pathways provided by the CeO2 nanorods, the strong electronic interaction between CeO2 and (Ni, Co)(3)S-4, the abundant oxygen vacancies promoting electronic conductivity and OH-capture, and the robust mechanic stability of the core-shelled structure.
APPLIED SURFACE SCIENCE
(2022)
Article
Energy & Fuels
Junyu Hao, Zhen Jiang, Hassnain Abbas Khan, Omar El Tall, Aamir Farooq
Summary: CeO2/Co3O4 mixed nanocomposites were successfully prepared using MOFs, and the addition of Ce enhanced the catalytic performance and stability of Co3O4 for CO and C2H4 oxidation reactions.
Article
Engineering, Chemical
Zeyu Jiang, Shengying Zhao, Yuhao Yang, Minghui Tan, Guohui Yang, Yisheng Tan
Summary: In this study, a series of Ce-BTC MOF-derived nanorod CeO2 catalysts were prepared for the direct synthesis of DMC from CO2 and methanol. The calcination atmosphere had a great impact on the structure and catalytic properties of the obtained CeO2 catalysts. CeO2 derived from calcination under H2 atmosphere at 500 degrees C exhibited higher specific surface area, oxygen vacancy concentration, and CO2 adsorption capacity, leading to a significantly higher DMC yield compared to commercial nano CeO2 and other prepared catalysts without dehydrating agents.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Alexandra Loosen, Charlotte Simms, Simon Smolders, Dirk E. De Vos, Tatjana N. Parac-Vogt
Summary: Tuning the Ce/Zr metal ratio in MOFs is a promising strategy to improve catalytic activity, increase efficiency in peptide hydrolysis and oxidation, broaden reaction scope, and enhance adsorption of dipeptides. The introduction of Ce enhances the reactivity of MOFs and their potential in various biologically relevant reactions.
ACS APPLIED NANO MATERIALS
(2021)
Article
Energy & Fuels
Mingwei Wu, Meng Miao, Wenzhi Li, Xia Zhang, Lulu Zhang, Taimin Zhen, Yan Fu, Jingting Jin, Liang Yuan
Summary: In this study, a unique 1D Pd@CeO2-BDC catalyst with rich oxygen vacancies and uniformly distributed PdO clusters and PdxCe1-xO2-s species on CeO2 surface was fabricated. The intense metal support interaction in the MOF skeleton resulted in the substitution of Ce4+ in CeO2 lattice by Pd atoms, thus significantly affecting the structure and electronic properties of the catalyst. The excellent reactivity of MOF-derived catalysts was attributed to lower energy barriers for methane activation on the reconstructed surfaces, as revealed by experimental and theoretical calculations. This research provides a new approach for the construction of lean methane combustion catalysts.
Article
Chemistry, Multidisciplinary
Tianen Chen, Allen Yang, Wei Zhang, Jinhui Nie, Tingting Wang, Jianchao Gong, Yuanhao Wang, Yaxiong Ji
Summary: In this study, an innovative strategy using graphene oxide (GO) was presented for the synthesis of GO-based metal-organic-framework composites (Co-BTC@GO) for high-performance supercapacitors. The optimal GO dosage was determined by morphology characterization and electrochemical measurement, and the 3D Co-BTC@GO composites demonstrated a microsphere morphology similar to Co-BTC. The composites exhibited stable interface and better charge transfer path compared to pristine GO and Co-BTC, resulting in excellent energy storage performance and outstanding life stability.
Article
Environmental Sciences
Dengfeng Yan, Tan Li, Peng Liu, Shengpeng Mo, Jinping Zhong, Quanming Ren, Yuhai Sun, Hairong Cheng, Mingli Fu, Junliang Wu, Peirong Chen, Haomin Huang, Daiqi Ye
Summary: In this work, spindle-like CeO2 supports with different contents of oxygen vacancies were prepared by in-situ thermal pyrolysis. The Pt-CeO2 interaction was regulated by the unique physicochemical properties of the modified CeO2 supports. The strong Pt-O-Ce bond on the PCH catalysts enhanced catalytic performance for toluene oxidation and CO tolerance.
Article
Chemistry, Applied
M. Angeles Stegmayer, Silvia Irusta, Eduardo E. Miro, Viviana G. Milt
Summary: Co, Ce and Co-Ce nanofibers were synthesized by electrospinning method and applied to gas-solid and solid-solid-gas reactions. Different activity trends were observed in CO oxidation and combustion of diesel soot, with Co-Ce nanofibers showing the highest activity for soot combustion and Co exhibiting the highest activity for CO oxidation. The temperature range for maximum combustion rate was narrow for soot combustion and wider for CO oxidation. The high activity for soot oxidation was attributed to multiple contact points between fibers and soot particles, while the trend observed for CO oxidation was related to the higher redox capacity of Co.
Article
Engineering, Chemical
Tengru Xie, Luwei Wang, Hexiang Wang, Chuan Cao, Chenliu Tang, Xiang Hu
Summary: Antibiotics cannot be completely removed through traditional treatment methods, posing a threat to human health. This study developed a Co/Ce-MOF electrode and carbonized it to obtain a MOF-derived carbon composite electrode. The Co/Ce-C350Air electrode showed high degradation efficiency for ceftazidime and demonstrated good electrochemical stability. The synergistic effect between Co and Ce metals improved the catalytic performance and stability of the electrode. The results provide a safe and effective strategy for antibiotic degradation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Chemistry, Physical
Adam F. Sapnik, Christopher W. Ashling, Lauren K. Macreadie, Seok J. Lee, Timothy Johnson, Shane G. Telfer, Thomas D. Bennett
Summary: Disordered metal-organic frameworks are attracting attention as functional materials, with Fe-BTC showing enhanced interaction strength with guest molecules compared to MIL-100. Fe-BTC exhibits discrimination in adsorption between C3H6 and C3H8, with potential powerful separation capabilities. The application of ideal adsorbed solution theory reveals thermodynamic selectivity towards industrially important binary mixtures, indicating the promising prospects of disordered materials in gas separation applications.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Physical
Dongsheng Xiang, Jinfeng Chen, Yin Wang, Qijia Zhu, Guang Lu, Xiaodong Zhang
Summary: This work presents a new strategy to improve the charge separation and transfer capability for the photocatalytic toluene mineralization by the synergistic effect of homophase junction and type-II heterojunction. The homophase junction is constructed by the slight difference of energy structure between anatase titanium dioxide with different particle sizes around 16 (denotes as A1) and 26 (denotes as A2) nm, showing a significant enhancement in the charge separation and transfer of heterojunction. The physicochemical and photoelectrochemical properties of the as-synthesized materials are investigated by several technologies. Additionally, the degradation pathway in the degradation toluene is investigated via in situ infrared method in detail.
Review
Engineering, Environmental
Borui Jie, Huidong Lin, Yixuan Zhai, Jiaying Ye, Deyu Zhang, Yifan Xie, Xiaodong Zhang, Yiqiong Yang
Summary: This review explores the application of luminescent metal organic frameworks (LMOFs) in detecting pollutants. The relationship between detection mechanism and signal emission is analyzed based on the structural characteristics of LMOFs, and various strategies for constructing and synthesizing LMOFs are proposed. Additionally, recent research progress in using LMOFs as fluorescent sensors to distinguish different types of pollutants is systematically summarized.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Physical
Jiayu Yu, Huanhuan Li, Naipeng Lin, Yishu Gong, Hu Jiang, Jiajia Chen, Yin Wang, Xiaodong Zhang
Summary: This paper reviewed the recent advances in regulating oxygen vacancies (OVs) in perovskite to enhance the functionality of the catalyst for treating organic wastewater using various advanced oxidation processes (AOPs), including substitution, doping, heat treatment, wet-chemical redox reaction, exsolution, and etching. The techniques for detecting OVs were also summarized. It provided insights into the OVs of perovskite and reduction mechanism in AOPs, which is helpful for understanding the methods of regulating and detecting OVs in various AOPs.
Article
Chemistry, Physical
Renzhi Rao, Shuting Ma, Bin Gao, Fukun Bi, Yifan Chen, Yang Yang, Ning Liu, Minghong Wu, Xiaodong Zhang
Summary: This paper reviews the recent applications of heterogeneous catalytic technologies in the degradation of volatile organic compounds (VOCs), including photocatalysis, thermal catalysis, and other catalytic approaches. It highlights the applications of metal organic frameworks (MOFs) and their derivatives in VOCs degradation, such as the progress of MOF-derived metal oxides in the treatment of toluene. The mechanisms of VOCs degradation by different catalytic approaches are systematically presented, and the views and directions of VOCs treatment technology development are discussed.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Applied
Yuchuan Ye, Liangjun Gao, Jing Xu, Luhui Wang, Liuye Mo, Xiaodong Zhang
Summary: The catalytic oxidation of ethyl acetate was studied using CuO/CeO2 catalysts prepared by ball milling with different precursors. The catalytic activity was found to be influenced by the specific surface area, particle size of CuO, and proportion of oxygen vacancies.
JOURNAL OF RARE EARTHS
(2023)
Review
Biochemistry & Molecular Biology
Yi Dang, Kexin Tang, Zhihao Wang, Haopeng Cui, Jianqiu Lei, Denghui Wang, Ning Liu, Xiaodong Zhang
Summary: This paper reviewed the photocatalysis method, the adsorption method with wide applicability, and the biological method mainly relying on enzymolysis and hydrolysis to degrade OPEs in water. All three methods had the advantages of high removal efficiency and environmental protection for various organic pollutants. The degradation efficiency of OPEs, degradation mechanisms, and conversion products of OPEs by three methods were discussed and summarized. Finally, the development prospects and challenges of OPEs' degradation technology were discussed.
Review
Engineering, Chemical
Zhenyuan Zhao, Shuting Ma, Bin Gao, Fukun Bi, Rong Qiao, Yang Yang, Minghong Wu, Xiaodong Zhang
Summary: In this work, the intermediate products in the process of eliminating various VOCs by different catalytic technologies are systematically reviewed. The advantages and disadvantages of various catalytic technologies in the control of by-products are described based on intermediates analysis. The paper also focuses on the detection techniques of characteristic intermediates in VOCs elimination, and discusses the characterization methods and their usage conditions. Several factors that affect the formation and conversion of intermediates are provided, especially the effects of catalysts surface metal capacity and oxygen species on intermediates. The review is believed to provide a good basis and reference point for the exploration of VOCs catalytic oxidation pathways and the analysis of intermediate products.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Yuxin Wang, Yinxiu Jin, Minghan Jia, Hu Ruan, Xuefen Tao, Xuefeng Liu, Guang Lu, Xiaodong Zhang
Summary: CeVO4-V2O3 composites were prepared by hydrothermal method and the effects of ethylene glycol (EG) on the products were investigated. The results showed that EG affected the crystalline phase, morphology, and separation efficiency of the composites. The photocatalytic degradation of methylene blue (MB) under simulated visible light was evaluated, and the sample with 10 mL EG exhibited the highest efficiency of 96.9%, while the sample with 15 mL EG showed the lowest efficiency of 67.5% within 300 min. The contribution of active species to the photocatalytic degradation was proposed to be center dot OH > h(+) > center dot O2- according to the trapping experiments and ESR experiment.
Article
Chemistry, Physical
Yin Wang, Huanhuan Li, Wannan Xia, Lan Yu, Yi Yao, Xiaodong Zhang, Hu Jiang
Summary: The interaction impact of carbon microspheres supported sulfurized nano zero-valent iron (CMS@S-nFe0) on the removal of Cr(VI) and p-nitrophenol (PNP) complex contamination was explored using response surface method (RSM). The results showed that CMS@S-nFe0 exhibited excellent performance in adsorption of heavy metals and degradation of organic pollutants.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Yiqiong Yang, Borui Jie, Jiaying Ye, Feiyang Gan, Shilin Yu, Huidong Lin, Xiaodong Zhang
Summary: This study investigated the degradation of tetracycline in water using N-doped iron-based catalysts, and explored the factors affecting the degradation efficiency. The results showed that the catalyst achieved a removal rate of 91% under optimal conditions, and LC-MS analysis revealed the degradation pathway. Additionally, ECOSAR assessments demonstrated a significant reduction in the acute toxicity, developmental toxicity, and mutagenicity of tetracycline and its intermediates. Therefore, the derivative of N-doped iron-based MOFs was identified as a highly promising and environmentally friendly catalyst for practical wastewater treatment applications.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Engineering, Chemical
Qiuyu Shen, Zhihui Lu, Fukun Bi, Dongfeng Zhang, Lijuan Li, Xiaodong Zhang, Yiqiong Yang, Minghong Wu
Summary: In this paper, three different reduction methods were used to synthesize Pt-loaded Co3O4, and it was found that the catalyst produced by the NaBH4 reduction method had the best activity. Through characterization and experiments, it was revealed that this synthesis method optimized the electronic metal-support interaction (EMSI) of the catalyst, leading to electron transfer between Pt species and Co3O4. The catalysts also showed excellent water resistance, stability, and recycling performance, and the possible degradation mechanism of toluene was revealed as well.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Ning Liu, Bin Hu, Kexin Tang, Tingyu Xia, Fei Li, Guixiang Quan, Xiaodong Zhang, Liang Tang
Summary: In the pursuit of restoring the natural equilibrium of our planet, the development of photocatalytic agents for CO2 reduction is crucial. A composite material HTiNbO5/ UiO-66 (UTi) was synthesized and showed significant improvement in the photoreduction efficiency of CO2 compared to pristine UiO-66 and HTiNbO5. The enhanced photocatalytic performance was attributed to increased specific surface area, improved visible-light absorption range, and reduced energy band gap.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Xiaodong Zhang, Shuting Ma, Bin Gao, Fukun Bi, Qinhong Liu, Qiangyu Zhao, Jingcheng Xu, Guang Lu, Yiqiong Yang, Minghong Wu
Summary: This research focuses on the preparation and characterization of modified UiO-67 (67-ben-DH) with improved water resistance. The study explores the adsorption performance, kinetics, defect engineering, and water resistance of the adsorbent. Results show that 67-ben-DH-6 exhibits excellent adsorption capacity for toluene and high water resistance, attributed to its pore structure, surface area, and N element.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Yin Wang, Naipeng Lin, Jin Xu, Hu Jiang, Rongzhao Chen, Xiaodong Zhang, Ning Liu
Summary: A series of two-dimensional catalysts were prepared for the microwave-combined PMS catalyzed degradation of antibiotic CIP. The catalyst showed high removal efficiency under optimal conditions. The effects of thermal and nonthermal effects of microwave irradiation on catalyst performance were investigated. LC-MS and DFT calculations revealed the degradation pathway and mechanism of CIP, and the ecological toxicity of CIP intermediates was evaluated.
APPLIED SURFACE SCIENCE
(2023)
Article
Energy & Fuels
Fukun Bi, Shuting Ma, Bin Gao, Baolin Liu, Yuandong Huang, Rong Qiao, Xiaodong Zhang
Summary: The regulation of metal-support interaction is an effective strategy to enhance the deep degradation of volatile organic compounds (VOCs). In this study, Pd@ZrO2 catalysts were synthesized using a Zr-based metal organic framework (MOF) as the precursor, and they exhibited superior catalytic performance, water-resistance, and stability compared to catalysts synthesized using Zr(OH)4 precursor. Characterization results revealed that the interfacial interaction in the MOF-derived Pd@ZrO2 catalysts improved reducibility, increased oxygen vacancies and adsorption of gaseous oxygen, leading to better toluene degradation performance. This work provides a new perspective on MOF-derived catalysts for the deep degradation of VOCs by tuning interfacial interaction.
Article
Chemistry, Applied
Lulu Wan, Gan Ye, Yuying Chang, Zhaohan Yang, Guangming Shi, Qiuli Zhang, Jin Wang
Summary: This study developed an efficient approach to upgrade the oxidative desulfurization (ODS) performance of Zr-MOFs with proton stimulation. Experimental results showed that the introduction of protons can significantly improve the ODS efficiency. This work provides a facile and efficient strategy for enhancing the ODS performance of pristine MOFs.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Qiqi Lu, Xiu-Zhi Wei, Qi Zhang, Xinghua Zhang, Lungang Chen, Jianguo Liu, Yubao Chen, Longlong Ma
Summary: The application of Pd-M bimetallic clusters in the selective hydrogenation reaction was investigated, and the Pd0.6Ni@S-1 catalyst was found to exhibit high selectivity in the conversion of phenylacetylene to styrene. The confinement effect of zeolite inhibited over-hydrogenation and improved the stability of the catalysts. Furthermore, the solvent properties also influenced the product distribution.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Review
Chemistry, Applied
Bo Li, Lumin Hong, Changdi Jing, Xianyang Yue, Huabo Huang, Qianqian Jiang, Jianguo Tang
Summary: MOF materials with adjustable pore structure and polymetallic sites have been explored as electrocatalysts for OER. Bimetallic materials show higher electrocatalytic activity than monometallic materials, while carbon-coated and doped MOF catalysts exhibit stable and good OER activity. The synergistic interaction between polymetallic active sites effectively improves the intrinsic activity of MOF on OER.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Shichun Gu, Ruyi Wang, Junxiong Zhang, Hairong Dong, Liping Deng, Xue Wang, Yapeng He
Summary: In this study, monodispersed hollow mesoporous organosilica nanospheres with controlled core cavity and mesoporous shell were successfully synthesized. These hollow nanospheres showed a high adsorption capacity for Pb2+ in water solution and exhibited acceptable recycling and stability.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Lucie Havelkova, Bogdana Bashta, Michaela Vankova, Jiri Zednik, Jiri Brus, Jan Svoboda, Alice Vagenknechtova, Jan Sedlacek
Summary: An atom-economic one-step chain-growth coordination homopolymerization providing high yields of functionalized hyper-cross-linked polyacetylenes with a permanent micro/mesoporous texture and a BET area of up to 1062 m2/g is reported. The homopolymerization is highly compatible with the heteroatom groups of the monomers and allows the preparation of well-defined porous networks with a wide spectrum of univalent groups.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Shirui Pang, Yuxin Liu, Zhe Zhang, Yuxin Li, Chunguang Li, Zhan Shi, Shouhua Feng
Summary: This study focuses on using a functional separator to suppress the shuttle effect of soluble lithium polysulfides in Li-S batteries. It is found that the functionalized sulfonic acid group not only accelerates the conduction of lithium ions, but also repels polysulfide anions through electrostatic interactions. The performance of the batteries is significantly improved with the use of this functionalized separator.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Pingping Li, Lei Han, Donghun Kim, Kemal Celebi
Summary: This study presents a fast synthetic strategy for the preparation of high-quality platelike MFI crystals using a thin-wall tubular reactor. The strategy is efficient, time-saving, and can be optimized, making it applicable to the preparation and optimization of other important materials.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Haitao Yin, Wei Wang, Yuxin Li, Hu Wen, Shuang Chen, Nanzhe Jiang
Summary: This study presents a template-free and solid-state-like crystallisation method for the synthesis of ZSM-5 zeolite, which can be scaled-up in production. Mechanical mixing of starting material components improves the dispersion of materials, leading to ZSM-5 zeolite with high crystallinity and size uniformity.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Congli Li, Jiang Wang, Zhenfei Wang, Jinxiang Dong, Qi Shi
Summary: This study investigates the evolution and autoreduction behavior of Cu species in CuCl/NaY adsorbent during vacuum thermal activation. It is found that Cu species migrate from supercages to the nearby plane of the six-membered ring connecting the supercage and sod cage during vacuum activation. At 150 degrees C, vacuum autoreduction occurs, resulting in the formation of Cu+Cl- species. The results provide reference for the preparation of pi-complex adsorbents.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Irena Khatrin, Iman Abdullah, Alan J. Mccue, Yuni K. Krisnandi
Summary: Hierarchical porous system with two types of mesopores provides a solution to the diffusion limitation in conventional zeolites. Cobalt oxide impregnated hierarchical ZSM-5 zeolite samples with intra- and inter-crystalline mesopores were synthesized using two different strategies. The physicochemical properties of the modified catalysts were analyzed, revealing distinct features given by the two mesoporous configurations. Catalytic activity analysis showed that Co-oxide/ZSM-5 with inter-crystalline mesopores exhibited higher activity in methane partial oxidation reaction compared to Co-oxide/ZSM-5 with intra-crystalline mesopores.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Nataliia Reinders, Martin Durovic, Pavla Honcova, Zaneta Dohnalova, Jana Luxova, Stanislav Slang, Jhonatan Rodriguez-Pereira, Petra S. Sulcova
Summary: This study presents a new method for preparing a microporous Ni2P/C catalyst with high catalytic activity. The redox reaction and carbon matrix formation during high-temperature treatment contribute to the stability and activity of the catalyst. Experimental and analytical results suggest that the microporous structure of the composite plays a crucial role in its catalytic performance. These findings are important for practical applications of efficient hydrogen production by water electrolysis.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Ana Raquel Bertao, Viktoriya Ivasiv, Cristina Almeida-Aguiar, Patricia R. Correia, Antonio M. Fonseca, Manuel Banobre-Lopez, Fatima Baltazar, Isabel C. Neves
Summary: This study developed a zeolite-based delivery system (ZDS) using silver and 5-Fluorouracil as antimicrobial and antineoplastic agents. The ZDS was characterized and its antimicrobial properties were investigated, showing better antibacterial effectiveness for the ZDS containing both silver and 5-FU.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Naonobu Katada, Nobuki Ozawa, Etsushi Tsuji, Keigo Kanehara, Akiho Otsuka, Taiga Sakamoto, Kirari Umezawa, Hitoshi Matsubara, Satoshi Suganuma, Momoji Kubo
Summary: First principles calculations were used to investigate the pathway for methylation of benzene with methane catalyzed by MFI type zeolite-supported Co species. The strong adsorption of benzene on Co is found to lower the activation energy for methane dissociation and promote the formation of toluene precursor. The activation energy of methane dissociation is also affected by the Al-Al distance.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Yuan Liu, An T. Ta, Kyoung Chul Park, Shenyang Hu, Natalia B. Shustova, Simon R. Phillpot
Summary: We use density functional theory to investigate the interactions of cerium, americium, and curium cations with crown ethers. Our results demonstrate that crown ethers can capture cerium, americium, and curium ions, and modifying the crown ether structure by substituting nitrogen atoms for oxygen atoms significantly increases their binding energies with radionuclides.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Zhengwu Peng, Shixing Wang, Yihui Wu, Xiang Liu, Hongliang Liu, Dekun Zhang, Likang Fu
Summary: An efficient adsorbent for recovery of germanium was prepared and characterized in this study. The adsorption behavior of Ge(IV) on the adsorbent was analyzed, and the results showed that it follows pseudo-secondary kinetic model and Langmuir isotherm model. The adsorbent exhibited good anionic anti-interference ability and can still maintain high adsorption efficiency after repeated adsorption.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)