Article
Chemistry, Physical
Han Zhang, Xuefeng Bai
Summary: A type-II heterojunction of protonated g-C3N4 coated Co9S8 semiconductor was constructed for photocatalytic H2O2 production. The photocatalytic system achieved considerable productivity of H2O2 in alkaline medium without the need for organic electron donors or pure O2. The optimal photocatalyst also exhibited good reusability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Fushan Wen, Yajie Li, Xiaoli Huang, Le Pang, Tao Zhang, Yuan Xu
Summary: Heterogeneous photo-Fenton technology, combining photocatalysis and Fenton reaction, efficiently utilizes solar energy and hydrogen peroxide to eliminate organic contaminants. This study developed highly catalytically active CN/3DOM-NFO composites by combining graphitic carbon nitride (CN) and three-dimensionally ordered macroporous (3DOM) nickel ferrite (NFO). The composites exhibited significantly higher tetracycline (TC) photo-Fenton degradation catalytic activity compared to pure g-C3N4 and bulk NFO. The synergistic interaction between the CN/3DOM-NFO heterojunction and the 3DOM structure contributed to the improved efficiency.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Jiahe Song, Kun Zhao, Xiangbin Yin, Ying Liu, Iltaf Khan, Shu-Yuan Liu
Summary: A Z-scheme g-C3N4/Ag/AgBr heterojunction photocatalyst was prepared via in-situ loading through photoreduction method. The g-C3N4/Ag/AgBr composite showed excellent photocatalytic performance in the degradation of tetracycline hydrochloride pollutants. The main active oxygen species involved in the degradation of organic pollutants were O2^- and (OH)·.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Physical
Xiaojing Han, Mengwei Li, Yongning Ma, Yingxuan Li, Hongrui Ma, Chuanyi Wang
Summary: In this study, Ag nanoparticles loaded g-C3N4 was prepared and used for photocatalytic CO2 reduction under high temperature conditions. The CO production rate was strongly dependent on the reaction temperature. Increasing the temperature could enhance the activation of molecules and contribute to the production of CO.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Physical
Yanyan Shang, Huiqing Fan, Xiuzi Che, Weijia Wang
Summary: This paper presents an efficient strategy for exposing unsaturated edge Ag on the surface of photocatalysts, forming Ag@g-C3N4 heterojunction. The introduction of Ag nanospheres into g-C3N4 enlarges the distance between g-C3N4 nanolayers and increases the exposure of Ag nanospheres. The Ag@g-C3N4 heterojunction provides polyunsaturated edge Ag as active sites and forms unique charge transfer channels, resulting in prolonged lifetime of photogenerated electrons.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Inorganic & Nuclear
Zhihao Zhang, Lifeng Cui, Yangang Wang, Chenjie Ding, Beili Sun, Ziqi Cao, Weikang Gao, Shifei Kang
Summary: A highly-efficient photo-Fenton catalyst with a porous structure and cyano group defects was successfully prepared in this study. The catalyst exhibited high removal rate and recycling stability due to the ideal coordination of Fe-N-x coupling structure and multiple defects, which improved the separation of photogenerated charge carriers and sped up the interfacial reaction.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Materials Science, Composites
Bangqi Wei, Chan Wang, Yimin He, Guoxia Ran, Qijun Song
Summary: In this study, a hybrid photo-Fenton catalyst was prepared by coupling FeS2 with g-C3N4, showing efficient organic pollutant degradation through a simple hydrothermal method. The catalyst exhibited high stability and degradation efficiency, even after 5 consecutive runs, providing a promising approach for wastewater purification.
COMPOSITES COMMUNICATIONS
(2021)
Article
Engineering, Environmental
Lianhu Xu, Yang Meng, Yonghuan Zhao, Juanjuan Su, Jian Han
Summary: In this paper, researchers formed a heterojunction structure by using two-dimensional graphitic carbon nitride (2D g-C3N4) and one-dimensional titanium dioxide nanorods (1D TNr) and modified the surface with a fluorinated silane compound. The resulting material was dispersed in a PVDF/PTFE mixture and formed a coating that can be easily sprayed, exhibiting excellent performance in visible photocatalytic degradation of pollutants and superhydrophobicity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Fucheng Yu, Junpeng Cui, Yadong Zhou, Yuanmeng Li, Zhengyan Liu, Ling He, Jianbin Zhang, Xianxi Tang, Yangshuo Liu
Summary: The ternary nanocomposite of g-C3N4/Ag/Ag2CrO4, prepared by depositing Ag nanoparticles on g-C3N4 nanotubes and partially oxidizing them, shows improved photocatalytic performance and effective separation efficiency of photo-generated electron-hole pairs, while also inhibiting photocorrosion.
Article
Energy & Fuels
Sripal Reddy Gujjula, Ujjwal Pal, Nageshwarrao Chanda, Sampath Karingula, Suman Chirra, Suresh Siliveri, Srinath Goskula, Venkatathri Narayanan
Summary: We developed a series of hybrid Ag@g-C3N4/r-GO nanocomposites for electro- and photocatalytic H-2 generation under visible light. The introduction of Ag metal into a hierarchical structure consisting of photo- and electroactive 2D sheets resulted in improved catalytic behaviors. The fabricated materials showed enhanced photocatalytic and electrocatalytic activities, making them promising for hydrogen evolution.
Article
Engineering, Chemical
Xiangchen Li, Dan Feng, Xiaoyan He, Dayi Qian, Bate Nasen, Baochuan Qi, Shuwen Fan, Jiangwei Shang, Xiuwen Cheng
Summary: In this study, a series of Z-type heterojunctions FexCN@MoS2-Y were synthesized for the removal of ciprofloxacin (CIP) by peroxymonosulfate (PMS) activation under visible light. Fe3CN@MoS2-4 exhibited excellent photocatalytic performance and could efficiently degrade other antibiotics. Reactive substances such as 1O2, h+, and Ovs played a dominant role in this system. Mechanisms and degradation pathways were explored to understand the enhanced CIP degradation efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Physics, Applied
Yang Li, Yue Lu, Xiaofang Jia, Zhaoyu Ma, Junying Zhang
Summary: Graphitic carbon nitride (g-C3N4) is a promising photocatalytic semiconductor, but its photocatalytic activity is limited by electron-hole recombination. In this study, we successfully formed a Z-scheme heterojunction by loading two-dimensional WO3 nanosheets onto the surface of one-dimensional g-C3N4 porous nanotubes. The heterojunction inhibits electron-hole recombination and enhances the photocatalytic activities for hydrogen production and Rhodamine B degradation.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Baskaran Palanivel, Md Shahadat Hossain, I. Neelakanta Reddy, E. Meher Abhinav, Abdullah M. Al-Enizi, Mohd Ubaidullah, Romulo R. Macadangdang Jr, Jaesool Shim
Summary: A g-C3N4/ZnCo2O4 Z-scheme heterojunction nanocomposite was prepared using the sol-gel method for photocatalytic RhB dye degradation with H2O2/PS assistance. The structural, crystalline, optical, and chemical compositions of the nanocomposite were discussed, and the key active species for dye degradation were identified. The nanocomposite showed high degradation efficiency under different conditions activated by H2O2 or PS.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Engineering, Environmental
Ajay Kumar, Kajal Sharma, Manita Thakur, Deepak Pathania, Arush Sharma
Summary: This study reports the fabrication of a novel LaFeO3/Cl-g-C3N4/RGO (LCCR) heterojunction with enormous photocatalytic activity. The LCCR nano-heterojunction demonstrates excellent photocatalytic activity due to reduced charge recombination rate. The photocatalytic potential of LCCR was tested for the photo degradation of aceclofenac drug and various operational parameters have been investigated. The results show promising potential for treating pharmaceutical effluents.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Tehmina Akhtar, Habib Nasir, Effat Sitara, Syeda Aqsa Batool Bukhari, Johannes W. Schwank
Summary: A novel and highly efficient Ag-ZrO2/g-C3N4 ternary heterojunction was synthesized by decorating Ag nanoparticles on ZrO2/g-C3N4 via ultrasonication. The as-prepared Ag-ZrO2/g-C3N4 showed the highest photocatalytic efficiency for the reduction of nitroaromatic compounds under visible light without reducing agent. Its excellent performance can be attributed to the formation of a good interface between Ag, ZrO2 and g-C3N4, as well as its stability.
SURFACES AND INTERFACES
(2023)
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.