Article
Chemistry, Multidisciplinary
Zhiling Tang, Chujun Wang, Wenjie He, Yuechang Wei, Zhen Zhao, Jian Liu
Summary: In this study, direct Z-scheme catalysts g-C3N4/3DOM-WO3 were fabricated, leading to enhanced catalytic activity for CO2 reduction through improved light absorption and separation efficiency of photogenerated electron-hole pairs.
CHINESE CHEMICAL LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Chi Ma, Quan Cheng, Ze-Xin Huang, Fu-Guang Zhang, Qing-Yu Liu, Yong-Jun Yuan
Summary: TiO2 nanoparticles grown on MoS2/N-doped graphitic carbon have been shown to be efficient noble-metal-free photocatalysts for H-2 production from lignocellulosic biomass. The H-2 generation rate from wheat straw, corncob, polar wood chip, bamboo, rice hull, corn straw, and rice straw aqueous solution respectively reaches 4.9, 6.7, 11.7, 14.5, 8.4, 7.3, and 6.2 mu mol g(-1) h(-1).
CHEMICAL COMMUNICATIONS
(2023)
Review
Chemistry, Multidisciplinary
Yakubu Adekunle Alli, Peter Olusakin Oladoye, Funeka Matebese, Naomi L. Senehi, Oyekunle Azeez Alimi, Adeniyi Sunday Ogunlaja, Fatwa F. Abdi, Hazleen Anuar, Adeyemi S. Adeleye, Karine Philippot
Summary: This review highlights the recent developments in the synthesis, characterization, computational insights, and emerging applications of Step-scheme (S-scheme) photocatalysts for CO2 transformation into value-added products. S-scheme heterojunctions are presented as a solution to the challenges associated with other heterojunction generations. The review also discusses the different synthesis approaches for S-scheme heterojunctions, charge transfer mechanisms, and prospects for their future applications.
Article
Chemistry, Physical
Yu Sun, Yan-Ling Yang, Hua-Jun Chen, Jiajun Liu, Xiao-Lei Shi, Guoquan Suo, Xiaojiang Hou, Xiaohui Ye, Li Zhang, Siyu Lu, Zhi-Gang Chen
Summary: A flexible and recoverable photocatalyst with high activity, MoS2/TiO2 heterojunctions grown on carbon-coated carbon textiles (CT@C-MoS2/TiO2), was reported. The recoverable CT@C-MoS2/TiO2 textile achieved a degradation rate of up to 98.8% for 10 mg L-1 rhodamine B within 30 min, which is significantly higher than most reported studies.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Junzheng Zhang, Jingjing Shi, Sheng Tao, Lei Wu, Jun Lu
Summary: Photocatalytic CO2 reduction using Cu2O/Ti3C2Tx heterojunction composites shows improved activity due to in situ growth promoting electron-hole pair separation and Ti3C2Tx acting as an electron acceptor for enhanced reduction reaction.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Oscar R. Andrade, Veronica Rodriguez, Rafael Camarillo, Fabiola Martinez, Carlos Jimenez, Jesusa Rincon
Summary: The effect of carbon support on the activity and selectivity of N-doped TiO2 nanoparticles was analyzed in this study. The results showed that the photocatalytic performance of the prepared catalysts was enhanced due to the synergistic effect of N doping and carbon support.
Review
Chemistry, Physical
Yuhao Liu, Xinlong Zheng, Yingjie Yang, Jing Li, Weifeng Liu, Yijun Shen, Xinlong Tian
Summary: This review article summarizes the development and application of TMS/TiO2 heterojunction photocatalysts, including their characteristics, properties, and advantages, and discusses the factors influencing photocatalytic hydrogen evolution process.
Article
Green & Sustainable Science & Technology
Kamil Urbanek, Kaja Spilarewicz, Jiaguo Yu, Wojciech Macyk
Summary: This work designed an advanced photocatalytic system composed of titanium dioxide (P25) and mSFO (Sn-doped magnetite with Fe-doped cassiterite) for gas phase CO2 reduction. A synthesis route of mSFO composite was proposed, and the obtained material was characterized by various techniques. The mSFO/P25 system showed photocatalytic reduction ability of CO2 to CO, which was confirmed by the use of labeled carbon dioxide. The surface photovoltage and electrochemical measurements supported the S-scheme mechanism.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Chemistry, Physical
Linjer Chen, Muhammed Arshad, Yuliv Chuang, Thanh-Binh Nguyen, Chung-Hsin Wu, Chiu-Wen Chen, Cheng-Di Dong
Summary: A novel heterojunction of MoS2 and a-Fe2O3 was successfully synthesized by hydrothermal method, which showed enhanced photocatalytic and photoelectrochemical performance due to special adjustments to the nanostructure. The nano MoS2/a-Fe2O3 exhibited excellent surface area and intrinsic edges, leading to more active reaction sites. The formation of strong heterojunction between the two semiconductors contributed to the improved photocatalytic degradation of organic dyes. The fabricated nano MF samples demonstrated stability, reusability and wide utilization potential in photocatalytic and PEC processes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Review
Chemistry, Physical
Beatriz Trindade Barrocas, Nela Ambrozova, Kamila Koci
Summary: The photocatalytic reduction of carbon dioxide to renewable fuel or valuable chemicals using solar energy has great potential but suffers from low efficiency due to fast electron-hole recombination and limited light utilization. Heterojunction photocatalysts are considered a possible solution to these challenges. This review provides an overview of the fundamental principles of CO2 photocatalytic reduction and various heterojunction photocatalysts, with a focus on the use of TiO2 and other semiconductors.
Article
Engineering, Environmental
Zhenzi Li, Haoze Li, Shijie Wang, Fan Yang, Wei Zhou
Summary: Mesoporous black TiO2/MoS2/Cu2S hierarchical tandem heterojunctions are fabricated as photocatalysts with visible-light photocatalytic hydrogen production rate of 3376.7 μmol h-1 g-1, attributed to suitable band gap alignment in the hierarchical tandem heterojunctions.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Kaja Spilarewicz, Kamil Urbanek, Anna Jakiminska, Wojciech Macyk
Summary: ZnFe2O4 (ZFO) composites with TiO2 (anatase, rutile) were synthesized and investigated for photocatalytic reduction of CO2 to CO. ZFO was obtained through precipitation from zinc and iron nitrates(V) precursors, followed by hydrothermal treatment, and its physicochemical properties were characterized. The results revealed that the ZFO/TiO2 systems formed type-I heterojunctions, which led to enhanced photoactivity of the composites. Furthermore, choosing anatase as the TiO2 polymorph favored higher yields of CO production.
JOURNAL OF CO2 UTILIZATION
(2023)
Review
Energy & Fuels
Jun Cai, Danyang Li, Lei Jiang, Jiangyong Yuan, Zhiqiang Li, Kongzhai Li
Summary: A promising approach to tackle energy shortages and environmental degradation caused by high CO2 levels is the transformation of carbon dioxide into renewable, high value-added products with minimal environmental impact and maximum efficiency. Photocatalytic reduction methods, particularly those utilizing cerium dioxide (CeO2)-based photocatalysts, have gained attention due to their tunable electronic structures and excellent photocatalytic performances. This review provides strategies for modifying CeO2 through techniques such as atom doping, heterostructure fabrication, defect creation, and crystal plane modulation to enhance its catalytic performance. Additionally, the fundamentals of converting CeO2-based photocatalysts into high value-added products and the challenges and prospects of CeO2-based catalysts for CO2 photocatalytic reduction are summarized.
Article
Engineering, Chemical
Yunxia Bai, Mei Li, Xuemei Liu, Jinyu Han, Xinli Zhu, Qingfeng Ge, Hua Wang
Summary: This study presents a direct Z-scheme photocatalytic system using Ti3+-defective TiO2/CdS nanoflowers to enhance CO2 reduction. The optimized heterojunction photocatalyst NF-TiO2/CdS(0.6) exhibits significantly improved activity for CO and CH4 as well as C2-C3 hydrocarbons. The enhanced yield of C1-C3 products is attributed to the synergistic effects of abundant Ti3+ defects, a large surface area, and a direct Z-scheme heterojunction.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Tianwei Ouyang, Jiaqing Guo, Haochen Shen, Manman Mu, Yongli Shen, Xiaohong Yin
Summary: The study involves designing a Z-scheme g-ZnO/2H-MoS2 heterostructure to spatially separate photogenerated carriers for enhancing CO2 photocatalytic reduction efficiency. The calculations show that the heterostructure effectively suppresses recombination of photogenerated electrons and holes, leading to improved reduction of CO2.
