Article
Chemistry, Physical
Tijana Stamenkovic, Dejan Pjevic, Jugoslav Krstic, Maja Popovic, Vladimir Rajic, Vesna Lojpur
Summary: A series of SrGd2O4 samples doped with different concentrations of Sm3+ and Dy3+ were prepared through glycine-assisted combustion synthesis. X-ray Powder Diffraction investigation confirmed the presence of pure orthorhombic lattice SrGd2O4. Energy Dispersive X-ray Spectroscopy showed that the desired elements were incorporated in the structure. Field Emission Scanning Electron Microscopy revealed the morphology of the samples as porous aggregated particles consisting of approximately 50 nm-sized spherical particles. Mercury Intrusion Porosimetry demonstrated the presence of a real permanent 3D pore structure. X-ray Photoelectron Spectroscopy confirmed the successful incorporation of Dy3+ and Sm3+ ions. Down-conversion luminescence spectra showed typical emission transitions for Sm3+ and Dy3+ ions. The energy band gap of the doped samples was calculated to be 4.3 eV using UV-VIS Diffuse Reflectance Spectroscopy. UV-VIS Absorption Spectroscopy observed the photocatalytic degradation process, with approximately 50% of Rhodamine B being mineralized after 4 hours of simulated Sun exposure.
SURFACES AND INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Shi Wang, Chunsheng Lei, Shihao Liu, Ruofei Shen, Siyang Feng, Qiyu Jin
Summary: A molecularly imprinted Bi/Ti/activated carbon photocatalyst (MG-MI) was synthesized using surface molecular imprinting, showing superior selectivity, adsorption capacity, and degradation rate compared to nonimprinted materials. The perfect combination of surface MIT and photocatalyst has great potential for the treatment of mixed pollutants in wastewater.
Article
Chemistry, Physical
Majing Wen, Hongying Yang, Linlin Tong, Liu Yuan
Summary: In this study, a new degradation-type catalyst was synthesized and applied for the degradation treatment of gold-cyanide wastewater, showing excellent photocatalytic performance and effectively removing cyanide under light conditions.
MOLECULAR CATALYSIS
(2023)
Review
Nanoscience & Nanotechnology
Amir Mehtab, Jahangeer Ahmed, Saad M. Alshehri, Yuanbing Mao, Tokeer Ahmad
Summary: Metal oxides are excellent photocatalysts with great potential in addressing environmental issues. Various efforts have been made in the past decades, including doping metal oxides with metals and non-metals, to enhance their photocatalytic activity. The advantages of doping metal oxides with rare earth metals include their easy combination with functional groups and the ability to exhibit prominent photocatalysis in the visible region. Researchers can improve the photocatalytic efficiencies of different metal oxides through various strategies.
Article
Chemistry, Physical
Xiaolong Hu, Junying Song, Shuilin Zheng, Zhiming Sun, Chunquan Li
Summary: TiO2/sepiolite composites with different contents of Ti3+ and oxygen vacancy were prepared and showed significant effects on the photocatalytic removal of formaldehyde and H2 evolution. The T-S-Ar composite exhibited the highest formaldehyde degradation efficiency and H2 production performance under simulated solar light.
MATERIALS TODAY ENERGY
(2022)
Article
Environmental Sciences
Xiumei Tao, Lei Zhu, Xun Wang, Xueqi Chen, Xian Liu
Summary: In this study, Y-ZrO2-TiO2 photocatalyst was prepared by sol-gel method, and the effects of various factors on its photocatalytic performance were investigated. The results showed that the addition of Zr and Y elements improved the photocatalytic performance of TiO2.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Xiaolong Hu, Chunquan Li, Junying Song, Shuilin Zheng, Zhiming Sun
Summary: A novel Bi2MoO6/TiO2/sepiolite ternary composite with hierarchical structure was designed through coupling Bi2MoO6/TiO2 heterojunction and sepiolite, exhibiting highly enhanced photocatalytic formaldehyde removal efficiency under visible light. The significantly enhanced performance can be attributed to the construction of the ternary hierarchical composite, which leads to increased adsorption capacity, extended absorption in the visible light region, and effective separation of photoinduced carriers. This study provides insight into developing a promising visible-light-driven photocatalyst for indoor gas remediation based on sepiolite-derived ternary composites.
APPLIED CLAY SCIENCE
(2022)
Article
Chemistry, Applied
Junying Song, Xiaofei Ren, Guicong Hu, Li Wang, Xiaolong Hu
Summary: In this study, the use of natural sepiolite as a support for TiO2 was found to improve the photocatalytic degradation activity of indoor formaldehyde (HCHO) under solar light. The optimal performance was achieved with a TiO2 loading amount of 50% and a crystallization temperature of 500 degrees C, resulting in a mineralization rate around 2.63 times higher than pure TiO2. The enhancement in performance can be attributed to the uniform deposition of TiO2 with smaller grain size on the sepiolite surface, leading to more exposed active sites, higher quantum efficiency, and faster carrier separation efficiency. This study enhances our understanding of the photocatalytic oxidation of HCHO by mineral-based photocatalysts and promotes their practical application in indoor air purification.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Environmental Sciences
Mekha Susan Rajan, Anju John, Minjoong Yoon, Jesty Thomas
Summary: The existence of antibiotics in aquatic streams is harmful to water quality and the ecosystem. Photocatalysis involving nanosemiconductors provides an environmentally friendly method for the degradation of antibiotics. In this study, a new visible light-sensitive photocatalyst, zeolite Y-supported carbon-doped TiO2 nanocomposite, was successfully prepared and applied for the elimination of cefazolin antibiotic in wastewater systems. The photocatalytic degradation efficiency of zeolite Y-c-TiO2 was found to be 100% for a 50mg L-1 methylene blue solution after 70 min of solar light irradiation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Crystallography
Federico Giuffrida, Lucia Calcagno, Gianni Pezzotti Escobar, Massimo Zimbone
Summary: The photocatalytic properties of TiO2/FeO3 and TiO2/WO3 nanocomposites were investigated for the degradation of methylene blue. The non-conventional Doctor Blade technique was proposed as an easy and inexpensive method for material preparation. The use of solid substrates rather than powders and the high surface area of nanoparticles improved the photodegradation efficiency.
Article
Chemistry, Physical
Ju Li, Bingxian Chu, Zhen Xie, Yaqian Deng, Yumin Zhou, Lihui Dong, Bin Li, Zhengjun Chen
Summary: The TiO2 catalysts doped with rare earth ions showed significantly improved photocatalytic activity under UV light, degrading various organic pollutants effectively. The synergistic effect of doping introduced impurity energy levels and oxygen vacancies, enhancing the capture of photogenerated electrons and reducing recombination rates. This study developed a high-efficiency catalyst for simultaneous photocatalytic degradation of organic pollutants in aqueous solutions using the sol-hydrothermal method.
Article
Chemistry, Physical
Xinlei Xie, Yulei Wang, Ming Hao, Penji Yan, Jinsheng Liang, Dongxu Wang, Hao Li, Fei Wang
Summary: In this study, highly dispersed tungsten disulfide (WS2) nanosheets were synthesized using sepiolite nanofibers as a carrier, through a cost-effective hydrothermal treatment and calcination under a H-2/N-2 atmosphere. The WS2 nanosheets exhibited improved dispersion and photocatalytic efficiency compared to pure WS2, due to the unique support provided by the sepiolite and the favorable bonding at the WS2/sepiolite interface. This work provides a novel strategy for the low-cost preparation of high-quality two-dimensional materials via assembly on mineral materials.
APPLIED CLAY SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Ziman Wang, Yin Gao, Yu Ma, Xixi Xie, Ming Yang, Hang Zhang
Summary: This study investigates the electrocaloric effect in polymer nanocomposite films containing lead-free nanopowders, and demonstrates that rare-earth doping can effectively modify the ECE of the materials, improving the electrocaloric strength and widening the temperature range.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2021)
Article
Environmental Sciences
Marwa Akkari, Afrah Bardaoui, Mohamed Amine Djebbi, Abdesslem Ben Haj Amara, Radhouane Chtourou
Summary: This study focused on the development and characterization of Ag-ZnO/sepiolite photocatalysts. The results showed that the Ag-ZnO/sepiolite photocatalysts prepared by a simple hydrothermal route exhibited enhanced photocatalytic activity, with the sample doped with 5% Ag showing the best performance.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Jai Prakash, Samriti, Ajay Kumar, Hongliu Dai, Bruno C. Janegitz, Venkata Krishnan, Hendrik C. Swart, Shuhui Sun
Summary: In recent years, one-dimensional nanostructures based on titanium dioxide have been extensively studied for their unique morphology and large specific surface area, but they face challenges in utilizing visible light due to a large band gap. Efforts have been made to improve the efficiency and visible light activity of these materials by doping or forming nanocomposites with other functional nanomaterials.
MATERIALS TODAY SUSTAINABILITY
(2021)
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)