Article
Chemistry, Applied
Hangjie Li, Yuehua Xiao, Jiale Xiao, Kai Fan, Bingkuan Li, Xiaolong Li, Liang Wang, Feng-Shou Xiao
Summary: By modulating the gallium species and hydrophobic methyl groups, the Cu/Ga-SiO2-Me catalyst achieved significantly improved DME selectivity and catalyst durability.
CHINESE JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Physical
Fangqian Han, Liu Qian, Qianru Wu, Dong Li, Shulan Hao, Lihu Feng, Liantao Xin, Tao Yang, Jin Zhang, Maoshuai He
Summary: A SiC supported iron (Fe-SiC) catalyst was developed for efficient growth of carbon nanotubes. The reducibility of the catalyst was enhanced by physical contact with oxide support, promoting the formation of active Fe nanoparticles for subsequent carbon nanotube synthesis.
Article
Polymer Science
Zhiyuan Jiang, Zewen Zhu, Mingzhen Zhao, Hengxi Chen, Hung-Jue Sue
Summary: In this research, a PEEK nanocomposite containing 10 wt% of well-dispersed MWCNT was successfully prepared and showed significantly improved mechanical properties and water absorption compared to a benchmark material. The enhanced properties were attributed to stronger intermolecular interaction and higher energy barrier for chain mobility in the PEEK/MWCNT system.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Thomas M. Rayder, Adam T. Bensalah, Banruo Li, Jeffery A. Byers, Chia-Kuang Tsung
Summary: Many enzymes utilize second sphere interactions to enhance catalyst activity and selectivity. A strategy is reported for efficiently manipulating outer-sphere influence on catalyst reactivity by modulating host-guest interactions. The use of ammonium functional group in UiO-66 results in improved efficiency in hydrogenation reactions, demonstrating the importance of proximity between functional group and encapsulated catalyst.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Review
Chemistry, Physical
Chang Liu, Zhongwen Liu
Summary: CO2 hydrogenation to DME is a potential process for effectively utilizing CO2 and outperforms photocatalytic or electrocatalytic routes. However, current catalysts still face challenges in efficiency and stability. This perspective focuses on different catalytic systems and analyzes the reaction mechanism, including active sites, activation modes, and CO2 molecules. In addition to traditional catalysts, In2O3-based catalysts are highlighted. GaN, as a bifunctional catalyst, shows high selectivity and activity for CO2 hydrogenation, and a non-methanol intermediate mechanism is emphasized. Suggestions for further research in catalysis and DME economy are provided.
Article
Chemistry, Physical
Birce Pekmezci Karaman, Nuray Oktar, Timur Dogu
Summary: Core-shell-type catalysts prepared by encapsulating CZA catalyst in STA-incorporated mesoporous alumina showed high DME yield in syngas and CO2 synthesis. Higher CO2/CO ratio favored the conversion rate of CO+CO2 and DME selectivity.
Review
Chemistry, Physical
Noelia Mota, Elena Millan Ordonez, Barbara Pawelec, Jose Luis G. Fierro, Rufino M. Navarro
Summary: This review presents the latest progress in the synthesis of bifunctional/hybrid catalytic systems for the CO2-to-DME process, discussing the challenges of combining metal and acid functionalities in the catalyst, and the different strategies employed to improve DME formation efficiency.
Article
Chemistry, Multidisciplinary
Irena Levin, Aurel Radulescu, Lucy Liberman, Yachin Cohen
Summary: This research aims to characterize the adsorption morphology of block copolymer dispersants of the styrene-block-4-vinylpyridine family (S4VP) on the surface of multi-walled carbon nanotubes (MWCNT) in a polar organic solvent, N,N-dimethyl formamide (DMF). The results show that the block copolymers adsorb onto the MWCNT surface as a continuous coverage of low polymer concentration. Increasing the PS molecular weight increases the thickness of the adsorbed layer but decreases the overall polymer concentration within it. These results are relevant for the ability of dispersed CNTs to form a strong interface with matrix polymers in composites, due to the extension of the 4VP chains allowing for entanglement with matrix chains.
Article
Energy & Fuels
Fatima Magzoub, Shane Lawson, Fateme Rezaei, Ali A. Rownaghi
Summary: Additive manufacturing, also known as 3D printing, was used to produce customizable heterogeneous catalysts for the conversion of methanol into dimethyl ether. Among the catalysts tested, the one containing 4 wt % Ga2O3 alongside ZSM-5 showed the best performance at 200 degrees C, achieving 85% methanol conversion and 74% DME selectivity.
Article
Materials Science, Multidisciplinary
Sara Navarro-Jaen, Mirella Virginie, Joelle Thuriot-Roukos, Robert Wojcieszak, Andrei Y. Khodakov
Summary: This study found that copper dispersion was higher and CO2 conversion rate was greater on alumina and zirconia supported catalysts, followed by ceria supported catalysts. The CO2 hydrogenation process appears to be mainly influenced by the higher copper dispersion and to a lesser extent by the concentration of Bronsted acid sites in the catalysts studied. Due to lower reverse water gas-shift activity, the alumina supported catalyst showed a higher dimethyl ether yield compared to the zirconia and ceria supported catalysts.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Xinxin Yuan, Chen Liang, Chao Ruan, Yi Chang, Lele Xu, Hailu Huang, Minghai Chen, Zhenzhong Yong
Summary: In this study, low-cost red soil was successfully used as a catalyst for the synthesis of high-quality multi-walled carbon nanotubes. The composition characteristics of red soil, rich in iron and aluminum oxide but lacking alkali and alkaline earth metals, contributed to its high catalyzation efficiency. The porous structure formed after calcination also played a positive role in the catalytic growth of MWCNTs, improving catalyst utilization by facilitating gas phase diffusion.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yang Cheng, Yong Chen, Shuxian Zhang, Xiaoting Wu, Chide Chen, Xin Shi, Ming Qing, Jifan Li, Chun-Ling Liu, Wen-Sheng Dong
Summary: Direct conversion of CO2 to aromatics using renewable hydrogen sources is a promising method to reduce CO2 emissions and replace fossil resources. A bifunctional catalyst, CuFeO2/hierarchical HZSM-5, demonstrated excellent performance in converting CO2 to aromatics. By eliminating external surface acidity, the selectivity of p-xylene in xylenes was significantly improved.
Article
Chemistry, Multidisciplinary
Sara Navarro-Jaen, Mirella Virginie, Jean-Charles Morin, Joelle Thuriot-Roukos, Robert Wojcieszak, Andrei Y. Khodakov
Summary: In this study, a hybrid catalyst composed of alumina supported copper-palladium nanoparticles and HZSM-5 zeolite was used for the direct synthesis of dimethyl ether from CO2. Copper active sites showed higher activity for CO2 hydrogenation compared to palladium. The low palladium content in the bimetallic catalysts was beneficial for dimethyl ether production. Catalyst characterization indicated the presence of copper and palladium monometallic and bimetallic particles with different sizes and reducibility in the hybrid catalysts. The study also found that the presence of even small amounts of palladium improved copper reducibility and dispersion, and the decrease in Bronsted acidity in the copper-containing catalysts was due to the migration of unreduced copper ions during reduction.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Itzhak I. Maor, Svetlana Heyte, Oren Elishav, Meirav Mann-Lahav, Joelle Thuriot-Roukos, Sebastien Paul, Gideon S. Grader
Summary: A new architecture of Cu- and Cu/Zn-based catalysts supported on electrospun alumina nanofibers was synthesized for the synthesis of methanol and DME from CO2 and green hydrogen. The hierarchical fibrous structure of the catalyst played a crucial role in the reaction activity and selectivity. The Cu or Cu/ZnO formed a unique nanosheet structure, providing a large surface area for the reaction. The catalysts containing 7% wt. Cu/Zn with a weight ratio of 2.3 Zn to Cu achieved maximal production of methanol and DME.
Article
Chemistry, Multidisciplinary
Chris J. Barnett, Alvin Orbaek White, Andrew R. Barron
Summary: It has been discovered that residual catalyst particles from the growth of multi-walled carbon nanotubes (MWCNTs) negatively impact their performance. Measurements of electrical transport have shown that the size of the catalyst particles and the ratio of their diameter to the MWCNT diameter affect the conduction mechanism.
Article
Chemistry, Physical
Qi-Wen Chen, Ze-Qing Guo, Jian-Ping Zhou
Summary: Multifunctional continuous solid solutions NFMTO-x were successfully synthesized via a one-step hydrothermal method by controlling the ratio of Mg and Fe. The NFMTO-x materials exhibited enhanced visible light response, effective adsorption and photocatalytic degradation of organic pollutants, CO2 methanation capability, and easy recyclability due to their magnetic properties. This research provides a significant multifunctional material for water purification.
APPLIED SURFACE SCIENCE
(2024)
Review
Chemistry, Physical
George E. Stan, Maziar Montazerian, Adam Shearer, Bryan W. Stuart, Francesco Baino, John C. Mauro, Jose M. F. Ferreira
Summary: Bioactive glasses have the ability to form strong bonds with tissues and release therapeutic ions. However, their biomechanical compatibility limits their use in load-bearing applications. The use of magnetron sputtering technology to fabricate BG coatings shows promise in improving their efficacy and potential for application.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zhaoxuan Wang, Zhicheng Yan, Zhigang Qi, Yu Feng, Qi Chen, Ziqi Song, Meng Huang, Peng Jia, Ki Buem Kim, Weimin Wang
Summary: The corrosion behavior of Fe-60 and Fe-83 ribbons in 0.6 M NaCl was studied. Fe-60 exhibited a local corrosion mode and formed a stable passivation film with higher corrosion resistance, while Fe-83 showed a combination of local and global corrosion modes and had lower corrosion resistance. Controlling the precipitation of nanocrystalline phases and increasing the POx content in the passivation film significantly improved the corrosion resistance of Fe-based glassy alloys.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hao-Kai Peng, Sheng-Yen Zheng, Wei-Ning Kao, Ting-Chieh Lai, Kai-Sheun Lee, Yung- Hsien Wu
Summary: This study investigates the effects of high energy/fluence proton radiation on the performance of HfZrOx-based FeFETs memory with different Zr content. The results show that the characteristics of FeFETs are influenced by proton radiation, and the extent of the influence depends on the Zr content. FeFETs with 50% Zr content exhibit minimal changes in memory window and demonstrate good endurance and retention performance.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zongyi Yue, Guangyi Wang, Zengguang Huang, Sihua Zhong
Summary: In this study, AZO and ITO films were successfully tuned as excellent passivation layers for c-Si surfaces, achieving effective minority carrier lifetime and outstanding optical properties through the optimization of annealing temperature and interfacial silicon oxide.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Martin Hruska, Jan Kejzlar, Jaroslav Otta, Premysl Fitl, Michal Novotny, Jakub Cizek, Oksana Melikhova, Matej Micusik, Peter Machata, Martin Vrnata
Summary: This paper presents a detailed study on the hydrogen sensing capabilities of highly nanoporous black gold films. The films exhibit fast response and recovery times at low temperatures. Different levels of nanoporosity were prepared and tested to investigate the sensing properties, and it was found that nanoporous black gold is suitable for hydrogen sensing. The sensitivity of the film depends on its nanoporosity.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yupu Wang, Gaofeng Teng, Chun To Yiu, Junyi Zhu
Summary: In the study of BM-SCO and HSCO thin films, it was found that H vacancies tend to prefer sites near the external surface or oxygen vacancy channels (OVCs), while H interstitials prefer sites of oxygen on a layer that contains six-fold coordinated Co. These findings not only enrich the understanding of complex surface phenomena of defect formation but also provide an explanation for the reversibility during phase transformation.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jiafeng Lu, Linping Teng, Qinxiao Zhai, Chunhua Wang, Matthieu Lancry, Ye Dai, Xianglong Zeng
Summary: In this study, we achieved full control of fiber nanograting orientation by manipulating laser polarization, and tailored space variant fiber nanogratings, which expanded the diversity in fiber nanograting engineering.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yibo Liu, Yujie Tao, Yue Liu, Qi Sun, Qinrong Lin, Kexin Kang, Qinghua Zhang, Qingjie Sun
Summary: This study investigates the wettability of the Ti-Cu-Fe multi-metal system, specifically the wetting behaviors of CuSi3 droplets on TC4 and 304SS plates. The results show that the CO2 + Ar gas atmosphere significantly affects interfacial mass transfer, thus influencing the wettability of the systems.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jimei Liu, Fei Wang, Rong Guo, Yuqi Liu, Mengyu Zhang, Jaka Sunarso, Dong Liu
Summary: This study developed Co/MXene composites with anti-corrosion properties by varying the cobalt content. These composites exhibited remarkable electromagnetic absorption performance and high resistance to corrosion under various corrosive conditions. The study also revealed the mechanism of electron transfer from cobalt to MXene and the electromagnetic dissipation behavior originated from polarization loss alone.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Moujie Huang, Yongsong Ma, Jingbo Yang, Lingyun Xu, Hangqi Yang, Miao Wang, Xin Ma, Xin Xia, Junhao Yang, Deli Wang, Chuang Peng
Summary: Strong metal-support interactions (SMSIs) are important for enhancing catalytic activities and stability in thermal catalysis. This study demonstrates a method to create SMSIs in electrocatalysis using carbon nanotubes and Ru nanoparticles, resulting in excellent catalytic activity and stability.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Ravi Trivedi, Brinti Mondal, Nandini Garg, Brahmananda Chakraborty
Summary: This study explores the potential of biphenylene as a nanocarrier for the delivery of the anticancer drug cisplatin. It is found that biphenylene offers physical stability, rapid release rate, solubility, and bio-compatibilities compared to other nanocarriers. The adsorption of cisplatin on the surface of biphenylene involves charge transfer from cisplatin to biphenylene. The drug is shown to be released at body temperature in an acidic environment. Biphenylene also exhibits excellent cytotoxicity activity and cellular uptake of the drug. Overall, biphenylene shows promise as a potential nanocarrier for cisplatin delivery.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hyun Jeong, Hyeong Chan Suh, Ga Hyun Cho, Rafael Salas-Montiel, Hayoung Ko, Ki Kang Kim, Mun Seok Jeong
Summary: In this study, a potential platform to enhance Raman scattering and increase the number of observable Raman modes in monolayer transition metal dichalcogenides (TMDs) was proposed. The platform consisted of large-scale arrays of gold micropillars (MPs), which were able to enhance the Raman intensity of TMDs and make difficult-to-detect Raman modes observable. The platform showed great industrial advantages and wide applicability due to its low cost, simple process, large controllable area, and short process time.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yasir Abbas, Shafqat Ali, Sajjad Ali, Waqar Azeem, Zareen Zuhra, Haoliang Wang, Mohamed Bououdina, Zhenzhong Sun
Summary: In this study, FeOx@SPNO-C core-shell nanospheres as a catalyst for degradation of sulfamethoxazole (SMX) were successfully synthesized. The synergistic interaction between FeOx and SPNO-C, high carbon charge density, and the presence of C = O groups and N/Fe-Nx sites were found to be key factors for the enhanced degradation of SMX.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Qiaoting Yang, Yuxiao Gong, Yan Qian, Zhou-Qing Xiao, Serge Cosnier, Xue-Ji Zhang, Robert S. Marks, Dan Shan
Summary: This study proposes a hierarchical confinement strategy to design Prussian blue nanoparticles (PB NPs) with satisfactory electrocatalytic ability and stability. The catalytic synthesis of PB NPs is achieved through a hydrothermal process, and the as-prepared PB@NH2MIL exhibits efficient electronic transmission and enhanced electrocatalytic properties.
APPLIED SURFACE SCIENCE
(2024)