Article
Chemistry, Multidisciplinary
Minjoon Kwak, Jinsol Bok, Byoung-Hoon Lee, Jongchan Kim, Youngran Seo, Sumin Kim, Hyunwoo Choi, Wonjae Ko, Wytse Hooch Antink, Chan Woo Lee, Guk Hee Yim, Hyojin Seung, Chansul Park, Kug-Seung Lee, Dae-Hyeong Kim, Taeghwan Hyeon, Dongwon Yoo
Summary: This study introduces a heterogeneous catalyst for visible-light-driven C-N functionalization, consisting of single nickel atoms supported on carbon nitride. Compared to previous semi-heterogeneous systems, this catalyst exhibits high activity and stability, and achieves a complete photocatalytic cycle through metal-support interactions.
Article
Chemistry, Physical
Jing Ma, Meizhe Liu, Mingxuan Zhu, Yutong Wang, Yamei Zhou, Baohe Wang
Summary: In this study, the formation process of catalyst active species after CO insertion and the reaction mechanism of ethylene hydroformylation to propionaldehyde were studied using the density functional theory (DFT) method. It was found that the polymer catalyst of crosslinking mode 2 is more favorable for the CO coordination of the main reaction, while that of crosslinking mode 1 can effectively improve the selectivity of ethylene hydroformyl to propionaldehyde. The Rh activity and Rh-P bond strength changed alternately in the step of propionaldehyde synthesis, and the change trend of the two is inversely proportional.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Zaid H. Jabbar, Shahlaa Esmail Ebrahim, Saad H. Ammar
Summary: In this study, reusable magnetic heterogeneous nanocomposites (SiO2/Fe3O4/Ag2WO4) were synthesized and applied as photocatalysts for visible-light responsive photocatalytic disinfection of E. coli. The synthesized materials were characterized using various techniques, and the SiO2/Fe3O4/Ag2WO4 photocatalyst showed improved antibacterial activity compared to other materials. Kinetics studies confirmed the higher disinfection rate of SiO2/Fe3O4/Ag2WO4, and the important roles of (OH)-O-center dot and H2O2 in the photocatalytic disinfection activity were demonstrated. Stability and reusability studies confirmed the good stability and easy magnetic separation of SiO2/Fe3O4/Ag2WO4.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Chemistry, Physical
Hiroaki Yoshida, Zhenhua Pan, Ryota Shoji, Vikas Nandal, Hiroyuki Matsuzaki, Kazuhiko Seki, Takashi Hisatomi, Kazunari Domen
Summary: In this study, charge separation in Y2Ti2O5S2 was improved by heterogeneous doping with Sc3+ ions. The optimized Sc-doped Y2Ti2O5S2 exhibited 3.4 times higher activity in photocatalytic H-2 evolution compared to the pristine material. This enhancement was attributed to the shallower trap state distribution and improved hole detrapping provided by Sc doping.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Inorganic & Nuclear
Fengkun Bai, Hanning Li, Xu Jing, Chunying Duan
Summary: In this research, CdS nanoparticle-doped metal-organic frameworks (CdS@DUT-52) with different contents were synthesized using a solvothermal method. UV-vis spectroscopy and photoelectrochemical testing proved that CdS@DUT-52 possesses strong light absorption ability and effective electron-hole separation properties. CdS@DUT-52 was used to trigger the photooxidation of amines, sulfides, and alcohols in the presence of air or oxygen, resulting in considerable yields of corresponding imines, sulfoxides, and aldehydes compared to a single component.
DALTON TRANSACTIONS
(2023)
Article
Engineering, Environmental
Ho Sub Bae, Ruturaj P. Patil, Jun Ha Hwang, Mahadeo A. Mahadik, Min Seok Song, Weon-Sik Chae, Velu Manikandan, Jum Suk Jang
Summary: We synthesized cobalt oxide loaded Rh/Sb:SrTiO3-nanocube photocatalysts and demonstrated their effectiveness in organic dye degradation and bacterial inactivation. The photocatalysts showed high degradation efficiency for Orange II dye and bisphenol A under visible-light irradiation, as well as high bacterial inactivation efficiency for Staphylococcus aureus and Escherichia coli. The enhanced activity was attributed to delayed charge recombination, generation of oxygen vacancies, and the synergistic effect of a metallic Co/CoOx phase. Furthermore, radical trapping experiments confirmed the involvement of O-center dot(2)- and h(+) in the degradation of Orange II.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Weiyu Wang, Qiming Sun, Qiang Wang, Shenhui Li, Jun Xu, Feng Deng
Summary: The investigation on rhodium-containing silicalite-1 zeolites using the HET-PHIP NMR technique reveals that the supported rhodium species and zeolite structure play crucial roles in molecule polarization and signal enhancement. Intensive polarized signals are observed on self-pillared silicalite-1 nanosheets supported rhodium catalyst, while silicalite-1 nanocrystals supporting large rhodium nanoparticles show lower activity for the generation of polarization. Single-atom rhodium encaged in silicalite-1 nanocrystals exhibits high hydrogenation activity but low observed polarization generation efficiency, indicating the critical role of the interactions between polarized molecules and micropore structures in attenuating the polarization.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Aswin Gopakumar, Peng Ren, Jianhong Chen, Bruno Vinicius Manzolli Rodrigues, H. Y. Vincent Ching, Aleksander Jaworski, Sabine Van Doorslaer, Anna Rokicinska, Piotr Kustrowski, Giovanni Barcaro, Susanna Monti, Adam Slabon, Shoubhik Das
Summary: The development of smart and sustainable photocatalysts is crucial for the synthesis of H2O2 due to the increasing global demand. Traditional methods of H2O2 synthesis generate chemical waste and require high energy input, making the direct synthesis of H2O2 from seawater using photocatalysts significant.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Xiangyao Song, Shiwen Du, Xiangying Xing, Beibei Dong, Zhaochi Feng, Fei Cheng
Summary: Ba2Bi3Ta2O11Cl was successfully prepared via a simple one-step molten salt method, and its crystal morphology and structure were adjusted, leading to a significant improvement in its O-2-evolving activity. In addition, W doping enhances the charge separation efficiency and reduces the energy barrier for water oxidation reaction, thereby improving the activity. Finally, the optimized W-doped sample after molten salt treatment exhibits the highest O-2 production activity (55 μmol h(-1)) without any cocatalyst, which is 6 times higher than that of pristine Ba2Bi3Ta2O11Cl and 2 times higher than that of the undoped Ba2Bi3Ta2O11Cl treated with molten salt, respectively.
CHEMICAL COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
A. Kumaresan, A. Arun, V Kalpana, P. Vinupritha, E. Sundaravadivel
Summary: In this study, NiWO4 nanoparticles and polymer-based NiWO4 nanocomposites were synthesized and characterized. The nanocomposites showed nanoplate-like morphology and exhibited improved photocatalytic activity for the degradation of toxic dyes. Polymer materials such as polyaniline (PA) and polypyrrole acted as electron trap charge carriers and effectively inhibited fast electron recombination. The prepared NiWO4/PA nanocomposite exhibited a degradation efficiency of 94% for crystal violet and methylene blue dyes, indicating its potential application in wastewater treatment.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Ghader Hosseinzadeh, Naser Ghasemian, Sahar Zinatloo-Ajabshir
Summary: The TiO2/graphene nanocomposite supported on clinoptilolite nanoplate prepared by hydrothermal method showed significantly higher photocatalytic degradation efficiency for nitenpyram insecticide under visible light, mainly due to the advantages of clinoptilolite and graphene, such as microporous structure and enhancement of effective surface area. The hydroxyl radicals were identified as the main active species responsible for the photocatalytic degradation of nitenpyram. This study provides a new insight for fabricating more effective zeolite and graphene-based nanocomposite photocatalysts for environmental remediation.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Peijing Guo, Shaoyu Yuan, Bingrong Guo, Siwei Li, Yongjun Gao
Summary: A CoO-CdS heterostructured photocatalyst CC-2-300 loaded with carbon derived from chitosan was synthesized. It exhibits a significantly enhanced photocatalytic hydrogen evolution rate of 10.60 mmol g(cat)(-1) h(-1) under visible light irradiation, which is 7.21 times higher than that of pure CdS under the same conditions. This improvement is attributed to the formation of a direct Z-scheme heterojunction between chitosan-derived carbon supported CoO nanorods and CdS nanoparticles, which enhances carrier migration efficiency and reduces charge recombination on CdS.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Yuqing Hu, Puhui Deng, Wenying Wang, Linping Zhang, Yu Hou
Summary: Element doping and collaboration with other cocatalysts are important strategies to improve CdS's photoelectrochemical properties. In this study, manganese cadmium sulfides (MnxCd1-xS) were synthesized by a solvothermal method. The Mn0.5Cd0.5S sample showed the best photocatalytic hydrogen production, and further enhancement was achieved by coupling Ni-POMs as cocatalysts. The highest efficiency was observed for 15-Ni-4-Mn0.5Cd0.5S, which formed a double type-II heterojunction.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Tian Ma, Chunqi Liu, Zhao Li, Renji Zheng, Min Chen, Shujuan Dai, Tonglin Zhao
Summary: In this work, Bi2WO6/Zn-Al LDH heterostructures were successfully fabricated as highly effective photocatalysts using a facile two-step mechanochemical method. The composites showed greatly enhanced photocatalytic capacity compared to pristine Bi2WO6 and LDH. The energy band structure and transfer route for photogenerated charge carriers were discussed, providing insights into the reaction mechanism for the photocatalysis process.
APPLIED CLAY SCIENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
Chelsea G. Comadoll, Wade C. Henke, Julie A. Hopkins Leseberg, Justin T. Douglas, Allen G. Oliver, Victor W. Day, James D. Blakemore
Summary: [Cp*Rh] hydride complexes have been successfully synthesized and isolated using chelating diphosphine ligands, showing direct Rh-H interactions with characteristic infrared spectra frequencies. Comprehensive NMR experiments revealed unique spin systems and coupling patterns for these complexes, demonstrating a modular reduction/protonation reaction sequence for the preparation of diverse [Cp*Rh] monohydrides.