Article
Chemistry, Physical
Wanda Navarra, Ida Ritacco, Olga Sacco, Lucia Caporaso, Matteo Farnesi Camellone, Vincenzo Venditto, Vincenzo Vaiano
Summary: The beneficial effects of doping and heterojunctions on the photo-catalytic activity of ZnO and TiO2 were investigated. The presence of ZnO and N-doped TiO2 in the heterojunction resulted in a decrease in band gap energy and improved photocatalytic performance compared to N-doped TiO2 and ZnO alone.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Wei Wang, Qinyang Sheng, Guowei Zhi, Yuan Zhao, Ruiyang Qu, Luanhong Sun, Shengli Zhang
Summary: By adding CdS, the performance of heterojunction photocatalyst can be improved, the carrier recombination rate can be reduced, and the photocatalytic degradation activity can be enhanced. The addition of CdS also changes the charge transfer mechanism and raises the energy level of photoelectrons, resulting in a certain photocatalytic hydrogen evolution capacity.
APPLIED SURFACE SCIENCE
(2023)
Review
Materials Science, Multidisciplinary
Jun -Wei Zha, Mengyu Xiao, Baoquan Wan, Xinmo Wang, Zhi-Min Dang, George Chen
Summary: In this paper, recent research advances and important insights into carrier traps in polymer dielectrics are critically reviewed. The basic theory of carrier traps is systematically summarized, and the strategies for constructing carrier traps are described from three perspectives. Finally, the key points of carrier traps in dielectric energy storage are summarized and future development trends are discussed.
PROGRESS IN MATERIALS SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Jin Chen, Bing An, Yinlin Chen, Xue Han, Qingqing Mei, Meng He, Yongqiang Cheng, Inigo J. Vitorica-Yrezabal, Louise S. Natrajan, Daniel Lee, Anibal J. Ramirez-Cuesta, Sihai Yang, Martin Schroder
Summary: Researchers have reported a new metal-organic framework material, MFM-808-SO4, which exhibits high proton conductivity at high humidity and temperature. The material also possesses excellent photocatalytic activity for water splitting to produce hydrogen.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Environmental Sciences
Zhenlong Guo, Yi Wu, Changxia Sun, Jiaqi Wang, Qiang Li
Summary: Carbon nitride (CN) has various applications in photocatalytic treatment of environmental pollution. A key challenge in the field is to conveniently prepare CN with tunable band gap. In this study, CN was constructed through co-firing urea, melamine, and fumaric acid. By controlling the proportion of fumaric acid, the polymerization degree and morphology of CN could be modified. The CN sample with the doped ratio of 2.50:0.50:0.03 m urea/m melamine/m fumaric acid displayed remarkable photocatalytic ability, achieving 98.0% methyl orange degradation within 60 min.
Article
Chemistry, Multidisciplinary
Xuewen Zhao, Mengyue Gu, Rui Zhai, Yuhao Zhang, Mengting Jin, Yanhao Wang, Jiangfan Li, Yonghong Cheng, Bing Xiao, Jinying Zhang
Summary: Recently confirmed violet phosphorus (VP) has unique photoelectric, mechanical, and photocatalytic properties. By substituting antimony for some phosphorus atoms in VP crystals, the physical and chemical properties are modified, resulting in significantly enhanced photocatalytic hydrogen evolution performance.
Article
Chemistry, Multidisciplinary
Jun Xiong, Haoxue Huang, Bo Lin, Jiexiang Xia, Jun Di
Summary: This study successfully synthesized BiPO4 photocatalysts with controllable oxygen vacancy concentrations and found that BiPO4 materials with lower oxygen vacancy concentration exhibited unexpectedly higher photocatalytic efficiency, which can be enhanced by adjusting the energy band structure.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Mengdi Sun, Zemin Zhang, Jianlong Yang, Qiujin Shi, Mingzheng Xie, Weihua Han
Summary: Nano-sized BiVO4 with particle size ranged from 27 nm to 57 nm was successfully synthesized in this work, showing enhanced activity for hydrogen generation by water splitting compared to bulk BiVO4. The improvements in activity are mainly attributed to the reduced particle size, resulting in elevated conduction band, enlarged specific surface area, and promoted charge separation.
CHINESE CHEMICAL LETTERS
(2021)
Review
Energy & Fuels
Yujie Bao, Shaoqing Song, Guojian Yao, Shujuan Jiang
Summary: The development history, advantages, applications, challenges and outlook of S-scheme photocatalysts have been summarized and discussed in this article, providing insights for utilizing their potential in renewable energy generation and environmental remediation.
Article
Chemistry, Physical
Saman Karimi Haji Shoreh, Mahdi Ahmadyari-Sharamin, Hamid Ghayour, S. A. Hassanzadeh-Tabrizi, Reza Pournajaf, Morteza Tayebi
Summary: The research indicates that compositing MgFe2O4 and SnO2 can enhance the efficiency of photocatalytic degradation reaction, while adding Ag can increase the degradation mechanism by preventing electron-holes recombination.
SURFACES AND INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Yingke Zhu, Zhonghui Shen, Yong Li, Bin Chai, Jie Chen, Pingkai Jiang, Xingyi Huang
Summary: Dielectric polymer nanocomposites, with the introduction of boron nitride nanosheet (BNNS), show significantly improved electrical energy storage capability, including suppressed leakage current, superior breakdown strength, improved modulus, boosted discharge energy density, and charge-discharge efficiency.
NANO-MICRO LETTERS
(2022)
Article
Instruments & Instrumentation
D. Ertel, M. Schmoll, S. Kellerer, A. Jaeger, R. Weissenbilder, M. Moioli, H. Ahmadi, D. Busto, I. Makos, F. Frassetto, L. Poletto, C. D. Schroeter, T. Pfeifer, R. Moshammer, G. Sansone
Summary: The implementation of attosecond photoelectron-photoion coincidence spectroscopy requires a high-repetition-rate driving source and stable experimental setups for data acquisition over long time intervals. This is crucial for studying processes with low cross sections and characterizing photoelectron(s) and photoion(s) angular and energy distributions. By using industrial-grade lasers and a carefully designed delay line, ultrastable experimental conditions were achieved with an error in time delay estimation of only 12 as over a 6.5-hour acquisition time. This opens up new possibilities for investigating attosecond dynamics in simple quantum systems.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Chemistry, Physical
Dinghan Liu, Liangliang Feng, Liyun Cao, Ting Xiao, Jianfeng Huang
Summary: This study proposes a strategy to enhance the reduction ability of photo-generated electrons in bismuth tungstate by doping Ce/N ions, which shifts the conduction band potential negatively and forms an impurity level beneficial to light absorption and electron movement. The as-prepared BWCeO-4 and BWCeNO-4 showed degradation efficiencies of up to 95.5% and 85% within 90 minutes under visible light irradiation, with hydrogen production reaching 16.89 mmol g(-1) and 14.78 mmol g(-1) after 4 hours, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Review
Chemistry, Physical
Cheng Hu, Hongwei Huang
Summary: Semiconductor-based photocatalysis is an efficient technology for reducing energy consumption and environmental pollution, but charge recombination limits its efficiency. Piezo-photocatalysis, by coupling the piezoelectric effect with photoexcitation, can modulate charge carrier dynamics and improve catalytic energy conversion efficiency. This study introduces the mechanism and enhancement strategies of piezo-photocatalysis and reviews recent advances in energy applications. It also analyzes the challenges in the development of piezo-photocatalysis.
ACTA PHYSICO-CHIMICA SINICA
(2023)
Article
Chemistry, Physical
Yawei Jiang, Yan Mi, Chufan Li, Wenjian Fang, Xiaochuan Li, Xianghua Zeng, Yongsheng Liu, Wenfeng Shangguan
Summary: In this study, the solid solution Bi3-xYxO4Cl was successfully synthesized with tunable absorption edge and bandgap by adjusting the Bi content and Y/Bi ratio, showing excellent visible-light photocatalytic water splitting performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Applied
Haruna Hori, Mai Takashima, Mai Takase, Mika Kitamura, Fumiaki Amano, Bunsho Ohtani
Article
Electrochemistry
Akio Nitta, Mai Takashima, Naoya Murakami, Mai Takase, Bunsho Ohtani
ELECTROCHIMICA ACTA
(2018)
Article
Chemistry, Physical
Nurafiqah Rosman, Wan Norharyati Wan Salleh, Ahmad Fauzi Ismail, Juhana Jaafar, Zawati Harun, Farhana Aziz, Mohamad Azuwa Mohamed, Bunsho Ohtani, Mai Takashima
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2018)
Article
Chemistry, Physical
Kenta Kobayashi, Mai Takashima, Mai Takase, Bunsho Ohtani
Article
Chemistry, Multidisciplinary
Yang Shen, Akio Nitta, Mai Takashima, Bunsho Ohtani
Summary: Experimental evidence shows that interparticle spatial overlapping of orbitals leads to interparticle charge-transfer excitation at an anatase-rutile interface, which can help clarify the relative band position of metal-oxides and the mixture homogeneity of mixture samples.
Article
Chemistry, Physical
Pradudnet Ketwong, Shun Yoshihara, Shugo Takeuchi, Mai Takashima, Bunsho Ohtani
JOURNAL OF CHEMICAL PHYSICS
(2020)
Article
Chemistry, Multidisciplinary
Guangyi Chen, Mai Takashima, Bunsho Ohtani
Summary: Analyzing the changes in surface and bulk structures of rutile titania particles induced by braying and post-calcination, it was found that the surface was amorphized and partly recrystallized, leading to decreased photocatalytic activities. This was evidenced by the energy-resolved distribution of electron traps observed using reversed double-beam photoacoustic spectroscopy.
Article
Chemistry, Multidisciplinary
Tharishinny Raja-Mogan, Anais Lehoux, Mai Takashima, Ewa Kowalska, Bunsho Ohtani
Summary: This study presents a novel structured material, titania inverse-opal photonic crystal, with or without a single gold nanoparticle in each void, offering a photoabsorption design strategy for enhanced photoreaction rates. This strategy is effective only when the wavelengths of photo-irradiation, photoabsorption, and photonic-bandgap edge are all matched.
Article
Chemistry, Physical
Justyna Luczak, Anna Pancielejko, Guangyi Chen, Mai Takashima, Adriana Zaleska-Medynska, Bunsho Ohtani
Summary: Titanium dioxide photocatalyst particles were prepared using titanium alkoxide and various ionic liquids, with some exhibiting higher photocatalytic activity for phenol degradation under light irradiation compared to others. The presence of certain ionic liquids was found to induce the formation of a surface amorphous layer covered with hydrophobic organic residues, enhancing the adsorption of phenol on the surface.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Bunsho Ohtani, Mai Takashima
Summary: This passage raises questions about the identification of inorganic solids compared to organic compounds, exploring the concept of identification and the possibility of using specific fingerprints to identify inorganic solids. It also discusses the application of energy-resolved distribution of electron traps (ERDT) patterns in solid materials and their significance for the photocatalytic activity of titania samples.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Fitri Rizki Amalia, Mai Takashima, Bunsho Ohtani
Summary: We present a simplified and reliable colorimetric formaldehyde analysis method using only a spectrophotometer/colorimeter. This method allows for the evaluation of true photocatalytic activity induced by photoabsorption of a photocatalyst, compared to gas-chromatographic analyses of gaseous products, even though the reliability of colorimetric organic-dye analysis is compromised under visible-light irradiation.
CHEMICAL COMMUNICATIONS
(2022)
Article
Engineering, Chemical
Lei Wang, Tharishinny R. Mogan, Kunlei Wang, Mai Takashima, Bunsho Ohtani, Ewa Kowalska
Summary: Novel materials with a periodic structure have been intensively studied for their potential applications in photonics and photocatalysis. This study investigates inverse opal titania (IOT) as a possible enhancement for photocatalytic activity. The results show that the photonic properties of IOT, such as photonic bandgap (PBG) and slow photons' wavelengths, have a significant influence on photocatalytic performance, with the best activity achieved by tuning the PBG wavelength to match the bandgap energy of the photocatalyst.
Article
Chemistry, Multidisciplinary
Haruki Nagakawa, Tsuyoshi Ochiai, He Ma, Changhua Wang, Xintong Zhang, Yang Shen, Mai Takashima, Bunsho Ohtani, Morio Nagata
Article
Engineering, Environmental
Pradudnet Ketwong, Mai Takashima, Akio Nitta, Pusit Pookmanee, Bunsho Ohtani
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2018)
Article
Chemistry, Applied
Qingyuan Zheng, Jack H. Williams, Scott Elgersma, Mick D. Mantle, Andrew J. Sederman, G. Leendert Bezemer, Constant M. Guedon, Lynn F. Gladden
Summary: In this study, a pilot-scale fixed-bed reactor compatible with NMR/MRI was developed for Fischer-Tropsch synthesis. Multiple magnetic resonance techniques were applied to quantitatively characterize different product species within catalyst pellets, providing valuable information for catalyst and reactor optimization.
Article
Chemistry, Applied
Lisa Ramisch, Sebastian Pfaff, Sabrina M. Gericke, Edvin Lundgren, Johan Zetterberg
Summary: We present a combination of optical operando techniques that allow simultaneous measurement of adsorbed species on catalyst surfaces, monitoring of surface oxide formation, and imaging of the gas phase above the catalyst surface. The experimental setup was validated by studying CO oxidation on Pd(100) at different pressures, revealing the effects of pressure on the heterogeneous catalytic reaction.
Article
Chemistry, Applied
Marta Paniagua, Gabriel Morales, Juan A. Melero, Daniel Garcia-Salgado
Summary: The influence of common impurities in levulinic acid on the catalytic performance of different acid catalysts for bio-jet fuel production was studied. It was found that furfural had the greatest detrimental effect on catalyst performance, while propyl-sulfonic acid-modified SBA-15 and sulfonic acid resin Amberlyst-70 showed good regeneration ability.
Article
Chemistry, Applied
Jesus Tapiador, Pedro Leo, Guillermo Calleja, Gisela Orcajo
Summary: This study presents a new MOF material, Zn-URJC-13, with acid and basic sites, permanent porosity, and high affinity to CO2 molecules. The Zn-URJC-13 catalyst exhibits efficient performance in CO2 cycloaddition reactions and can be reused multiple times.
Article
Chemistry, Applied
Dan Zhao, Vita A. Kondratenko, Dmitry E. Doronkin, Shanlei Han, Jan-Dierk Grunwaldt, Uwe Rodemerck, David Linke, Evgenii V. Kondratenko
Summary: This study demonstrates the potential of cheap and commercially available Zr or Ti-based supports and ZnO to serve as active and selective catalysts for propane dehydrogenation (PDH). The catalytically active species formed in situ under PDH conditions consist of isolated ZnOx. ZnOx on the surface of LaZrOx shows the highest rate of propene formation.
Article
Chemistry, Applied
Hanbyeol Kim, Jung Rae Kim, Young-Kwon Park, Jeong-Myeong Ha, Jungho Jae
Summary: In this study, metal phosphates were used as catalysts for biomass conversion to produce sustainable aromatics through DielsAlder cycloaddition reactions. The effects of synthesis method, activation method, and P/Ti molar ratio on the structure and acid properties of titanium phosphate catalysts were systematically studied. The mesoporous titanium phosphate catalyst synthesized by hydrothermal method at 180℃ for 12 h followed by ethanol refluxing at 60℃ for 24 h at a molar P/Ti ratio of 1 showed the highest surface area and acid site density.
Article
Chemistry, Applied
Yasin Khani, Sumin Pyo, Kwang-Eun Jeong, Chul-Ung Kim, Moonis Ali Khan, Byong-Hun Jeon, Kun-Yi Andrew Lin, Siyoung Q. Choi, Young-Kwon Park
Summary: A protonated form of Zeolite Socony Mobil-5 (H-ZSM-5) catalyst was synthesized through a hydrothermal method using different sources of silica. The effect of loading the catalyst with yttrium, samarium, and gadolinium on the acidic properties was investigated. Among the metal-loaded catalysts, the Sm/LHZ catalyst showed the best performance in the methanol to propylene conversion due to its high amount of weak and intermediate acid sites, while the Gd-LHZ catalyst increased the selectivity towards ethane and propane.
Article
Chemistry, Applied
Michael Franc, Ivana Cisarova, Jan Vesely
Summary: The present study investigates an enantioselective cyclization of enals with imidazolone derivatives catalyzed by a combination of achiral Pd(0) complex and chiral secondary amine. Corresponding spirocyclic imidazolones were produced in high yields with moderate diastereoselectivity and excellent enantioselectivity. The developed co-operative catalytic methodology provides a highly substituted spirocyclic scaffold with four stereogenic centers under mild conditions.
Article
Chemistry, Applied
Mauro Alvarez, Jennifer Cueto, David P. Serrano, Pablo Marin, Salvador Ordonez
Summary: This study focuses on improving the formulation and preparation methods of catalysts for the production of dimethyl carbonate. By using suitable catalyst preparation methods and copper salt precursors, the researchers successfully produced catalysts with optimal performance for dimethyl carbonate formation.
Article
Chemistry, Applied
Claudia J. Keijzer, Luc C. J. Smulders, Dennie Wezendonk, Jan Willem de Rijk, Petra E. de Jongh
Summary: This study investigates the catalytic behavior of alpha-alumina supported silver catalysts in the presence of chloride. It is found that the particle size of silver can affect the selectivity of the catalyst, but different strategies lead to different results. In this size range, the selectivity of ethylene oxide is correlated to the Ag : Al2O3 surface ratio.
Article
Chemistry, Applied
Takeshi Aihara, Wataru Aoki, Michikazu Hara, Keigo Kamata
Summary: The development of acid-base bifunctional catalysts is important for promoting specific chemical transformations. In this study, Ti-based perovskite oxides were synthesized and used as catalysts for two C-C bond-forming reactions (cyanosilylation and Knoevenagel condensation). The highly pure SrTiO3 nanoparticles with a high specific surface area exhibited the highest catalytic performance, and could be easily recovered and reused.
Article
Chemistry, Applied
Olga Gorlova, Petra Pribylova, Eliska Vyskocilova, Katerina Peroutkova, Jan Kohout, Iva Paterova
Summary: This study investigates the Baeyer-Villiger oxidation of beta-cyclocitral using tin-modified mixed oxides as catalysts. The optimal reaction conditions and the effects of various factors on the reaction course and selectivity were determined. The results show that tin-modified mixed oxides exhibit high activity and selectivity in the oxidation reaction.
Article
Chemistry, Applied
M. I. Avila, M. M. Alonso-Doncel, L. Briones, G. Gomez-Pozuelo, J. M. Escola, D. P. Serrano, A. Peral, J. A. Botas
Summary: The catalytic fast pyrolysis of lignin using ion-exchanged zeolite catalysts showed significant improvements in bio-oil quality and the production of aromatic hydrocarbons and oxygenated compounds.
Article
Chemistry, Applied
Enrico Catizzone, Giorgia Ferrarelli, Paolo Bruno, Girolamo Giordano, Massimo Migliori
Summary: The acid-catalysed alcohol conversion reaction is a promising route for de-fossilization strategies. Research on pure alcohol conversion and simultaneous dehydration of mixed alcohols have shown different product compositions, with the type and distribution of acid sites affecting the reaction mechanism.
Article
Chemistry, Applied
Alireza Ranjbari, Juho Kim, Jihee Yu, Jiyun Kim, Mireu Park, Nayoung Kim, Kristof Demeestere, Philippe M. Heynderickx
Summary: This study investigated a novel kinetic model for the adsorption and photocatalytic degradation of methyl orange using commercial ZnO and reduced ZnO photocatalysts. The results provided new insights into the interaction of catalysts with molecules of different charges and compared with a previous study on methylene blue. The presence of oxygen vacancies in ZnO and their effects on adsorption and photocatalytic degradation were analyzed, and the photocatalytic degradation rate of reduced ZnO was found to increase significantly.