Article
Materials Science, Multidisciplinary
Guangxin Zhang, Shilin Li, Huifang Jiang
Summary: To overcome the high electron-hole pair recombination rate of g-C3N4 as a photocatalyst, an efficient photocatalyst of g-C3N4/Bi2MoO6/kaolinite composite was constructed in this study. The g-C3N4 prepared by thermal condensation and Bi2MoO6/kaolinite prepared by hydrothermal method were tightly combined using electrostatic self-assembly. The multilevel structure of the composite confirmed the successful collaboration of the three components. The composite exhibited excellent photocatalytic performance when the mass ratio of Bi2MoO6/kaolinite and g-C3N4 was 0.25:0.75. The close contact and layered assembly of kaolinite and Bi2MoO6/g-C3N4 heterostructure contributed to the synergistic effect and the exceptional photocatalytic performance.
Article
Polymer Science
Hayati Mohamad Mukhair, Abdul Halim Abdullah, Zulkarnain Zainal, Hong Ngee Lim
Summary: The effectiveness of PES-Ag3PO4/g-C3N4 film photocatalyst in degrading methyl orange dye under visible light irradiation was explored in this study. The results showed that 13 wt % loading of Ag3PO4/g-C3N4 composite was the best for maintaining degradation performance. The predominant species responsible for methyl orange degradation were found to be O-2(-) and h(+).
Article
Engineering, Chemical
Rui Zhang, Junrong Yu, Chen Zhao, Lu Cai, Ze Yang, Ziyin Chen, Jiacheng Jiang, Yuhui Ma
Summary: This study synthesized g-C3N4/CuBi2O4/Bi2MoO6 3D flower-like spherical photocatalysts by a solvothermal method for the remediation of antibiotic-contaminated water bodies. The photocatalysts exhibited excellent degradation efficiency for tetracycline antibiotics under visible light irradiation. The composites showed low degradation rates for dye-based contaminants but maintained effective photocatalytic activity for antibiotics in a mixed contaminant system.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Engineering, Chemical
Ke Li, Miaomiao Chen, Lei Chen, Wencong Xue, Wenbo Pan, Yanchao Han
Summary: A Fe3O4/Bi2MoO6/g-C3N4 magnetic composite photocatalyst was synthesized for the photocatalytic degradation of sulfonamide antibiotics under visible light. Characterization techniques were used to analyze the samples, demonstrating efficient visible-light absorption and charge separation. The composite showed optimal performance at pH 9.0 and exhibited exceptional stability and recyclability. This study provides valuable insights into using magnetic composite photocatalysts for the degradation of sulfonamide antibiotics and showcases the potential of the Fe3O4/Bi2MoO6/g-C3N4 composite for practical applications in environmental remediation.
Article
Chemistry, Physical
Zhi-Jun Yi, Meng Wu, Yu Pang, Ran Jia, Ru-Ren Xu
Summary: This study investigates the importance of non-local dielectric screening effects in van der Waals heterojunctions, revealing the sensitivity of electronic structures to neighboring materials and the successful enhancement of photocatalytic performances through engineering surrounding polarizability environments in the form of vdWHs.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Ruijie Chen, Lei Wang, Jing Ding, Jinfeng Zhang, Hui Wan, Guofeng Guan
Summary: Photocatalytic CO2 reduction can address both the energy crisis and environmental issues. However, designing photocatalysts with efficient carrier mobility remains a challenge. In this study, a microwave-assisted method was used to construct a Bi2MoO6/g-C3N4 (BMO/CN) heterostructure, enhancing the formation of two-dimensional (2D) structures. The 2D BMO/CN junction exhibited superior performance in photocatalytic CO2 reduction. The optimized BMO/CN-30% catalyst showed a CO and CH3OH production rate of 2.44 and 3.61 μmol·g(-1)·h(-1) respectively. The formation of HCO3- intermediate was observed by in-situ FT-IR, confirming the evolution of CH3OH. This study highlights a microwave-assisted approach for enhancing photoreduction of CO2.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Sivasakthi Sethuraman, Amarnath Marimuthu, Radhakrishnan Kattamuthu, Gurunathan Karuppasamy
Summary: The study showed that Nb doping significantly improved the photocatalytic and gas sensing performance of urea-melamine derived g-C3N4, with 200Nb-UMCN nanosheets exhibiting the best performance. These nanosheets demonstrated high degradation rate, hydrogen production, and gas sensing capability. Additionally, their half-curled worm-like structure showed good structural stability during repeated applications.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Guangxin Zhang, Jianguang Fang, Haoran Xu, Jingmiao Hu
Summary: In this study, heterogeneous photocatalysts were prepared and characterized to improve the separation efficiency of photogenerated carriers. The Bi2MoO6/g-C3N4 composite exhibited excellent photocatalytic performance due to the band structures of g-C3N4 and Bi2MoO6 promoting the migration of photogenerated carriers and reducing the recombination rate of photogenerated electrons and holes. The photocatalytic process was mainly driven by superoxide free radicals.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Environmental Sciences
Bingzhi Yu, Wen Yan, Yunjuan Meng, Yinan Zhang, Xizi Li, Yan Li, Yuchi Zhong, Jiafeng Ding, Hangjun Zhang
Summary: In this study, a g-C3N4/Bi2MoO6 heterostructure was fabricated and optimized for efficient photocatalytic dechlorination of TCS under visible light irradiation. The catalyst exhibited high activity, with over 95.5% of TCS transformed in 180 minutes, which was 3.6 times higher than pure g-C3N4 powder. The catalyst promoted efficient electron-hole separation and showed high recyclability. The results provide a basis for designing high-performance photocatalysts for the reduction of aromatic chlorinated pollutants in dechlorinated waters.
Article
Chemistry, Multidisciplinary
Dong Liang, Xiaoyu Zhang, Yanle Li, Yumiao Zhou, Mengyu Ren, Xiaoyue Zhang, Yongxiang Li, Na Zhu
Summary: An energy-saving and friendly process was used to enhance the photocatalytic ability of the Ag/g-C3N4 photocatalyst for the ipso-nitration of bromophenols and nitrite. The presence of Ag nanoparticles on the surface of g-C3N4 was confirmed using SEM, TEM, and XRD, and their role in improving the photocatalytic ability was demonstrated through UV-vis, PL spectra, and photoelectronic analysis. The regioselective conversion of bromophenols was found to be influenced by their substituents, with fluoro-, chloro-, and bromo-substituted bromophenols showing higher nucleophilic potential. The photo-generated superoxide and active holes were identified as crucial in the photo-catalytic nitration process, leading to the formation of center dot NO2 radicals via the peroxynitrite pathway. The electrostatic potentials of the bromophenols were calculated to explain the distribution of photo-driven nitration products.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2023)
Article
Physics, Applied
Purna Chandra Patra, Y. N. Mohapatra
Summary: Graphitic carbon nitride, a highly stable wide bandgap material, has potential for thin-film applications, especially when used in conjunction with Al2O3 to increase dielectric constant in sandwiched devices. The leakage current density is low and current transport mechanisms are mainly space charge limited, with a slight but significant difference between forward and reverse bias due to the presence of negative sheet charge at the interface between the two dielectrics.
APPLIED PHYSICS LETTERS
(2021)
Article
Environmental Sciences
Vu Quang Hieu, Truong Chi Lam, Afrasyab Khan, Thu-Thao Thi Vo, Thanh-Quang Nguyen, Van Dat Doan, Dai Lam Tran, Van Thuan Le, Vy Anh Tran
Summary: The research utilized the titanium atom from Ti3C2 MXene to develop TiO2, forming a close heterostructure with semiconductors, while the high surface area of amorphous g-C3N4 contributed to light harvesting during photocatalytic activity. The optimized TTC-450 heterostructure demonstrated a higher H-2 generation efficiency compared to pure g-C3N4 and other samples.
Article
Chemistry, Inorganic & Nuclear
Jie Zhou, Beibei Zhu, Lu Wang, Yan Bao, Guofeng Guan
Summary: A novel Z-scheme CdS/CeO2/g-C3N4 nanocomposite was synthesized by a solvothermal method and its photocatalytic activity for the degradation of phenol was evaluated. The nanocomposite exhibited remarkable photocatalytic activity with a degradation rate of 95 % in 180 min, surpassing that of pure CeO2 and CdS/CeO2. The enhanced photocatalytic ability is mainly attributed to the higher adsorption capacity of three-dimensional porous g-C3N4 and the three-dimensional space electric field formed by its complex with CdS and CeO2.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Dapeng Zhang, Baofeng Li, Xinlong Mao, Zitong Fan, Zhe Yang, Min Wei, Ailing Zhang, Jin Feng, Siwei Bi
Summary: This study investigates the effect of alkali solution on the electronic structure of H2O/g-C3N4 and the dynamic process of water splitting. It is found that alkali can promote hydrogen production in g-C3N4 by accelerating the decomposition of H2O into H+. The alkali also reduces the free energy for H2O splitting and changes the position of the rate-determining step, making it easier for H to capture excited electrons and form H2.
NEW JOURNAL OF CHEMISTRY
(2022)
Review
Chemistry, Physical
Yash Rajput, Parveen Kumar, Tian C. Zhang, Dinesh Kumar, Meena Nemiwal
Summary: This review presents the recent advances in g-C3N4-based photocatalysts for hydrogen evolution reactions (HER), including the design and engineering of doped-g-C3N4, composites of g-C3N4, and engineered-g-C3N4. The characteristics and advantages of g-C3N4-based heterojunctions are analyzed, and current challenges and future perspectives are discussed.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Thermodynamics
Jiajia Xu, Pengyu Guo, Qiangling Duan, Xinchun Yu, Lin Zhang, Yujun Liu, Qingsong Wang
APPLIED THERMAL ENGINEERING
(2020)
Article
Chemistry, Multidisciplinary
Yupeng Song, Feng Zhou, Yongheng Chai, Su Zhan
Summary: The study indicates that the RGO/Bi2WO6 composite material shows potential applications in marine anti-pollution, with its microsphere structure demonstrating a higher sterilization rate. By improving charge separation efficiency and enhancing light utilization, it exhibits excellent performance.
RESEARCH ON CHEMICAL INTERMEDIATES
(2021)
Article
Chemistry, Physical
Ning Su, Feng Zhou
Summary: Improving the antimicrobial performance of surface coatings on ships in the complex marine environment is a pressing issue. Photocatalytic materials like BiOIO3 are used to enhance the sterilization performance of fluorocarbon resin coatings, showing significantly improved results in experimental tests.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Environmental Sciences
Fengguang Wang, Feng Zhou, Su Zhan, Qiuchen He, Yupeng Song, Chenglin Zhang, Jianfu Lai
Summary: This study prepared petal-like microspheres with silver nanoparticles, and the 0.7% Ag/Bi2O2CO3 composite photocatalyst exhibited excellent bacterial removal efficiency and high photogenerated carrier separation efficiency under visible light irradiation, achieving a sterilization rate of 95%.
ENVIRONMENTAL RESEARCH
(2021)
Article
Environmental Sciences
Peng Xing, Feng Zhou, Su Zhan
Summary: The research finds that vacancies can enhance photocatalytic activity, but may not be suitable for reactions in seawater. The addition of ZIF-8 can reduce N vacancies in g-C3N4 and improve photocatalytic activity. Heteroatoms in seawater can compete with proton reduction in catalytic reactions.
ENVIRONMENTAL RESEARCH
(2021)
Article
Environmental Sciences
Chenglin Zhang, Feng Zhou, Su Zhan, Yupeng Song, Fengguang Wang, Jianfu Lai
Summary: By synthesizing H2O2 through photocatalysis in seawater, the efficiency of inactivating marine microorganisms can be increased, expanding the application of photocatalytic technology in the field of marine antifouling.
ENVIRONMENTAL RESEARCH
(2021)
Article
Engineering, Chemical
Song Wang, Jingjing Tong, Liying Cui, Peng Zhang, Feng Zhou
Summary: The study successfully prepared LSN-MC dual-phase membrane for CO2 capture, demonstrating good chemical compatibility and stability, high CO2 permeability at high temperature, and stable operation in simulated flue gas.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Qiuchen He, Su Zhan, Feng Zhou
Summary: In this study, a tandem reaction of electrocatalytic synthesis and photocatalytic decomposition of hydrogen peroxide (H2O2) was constructed to improve the efficiency of marine microorganism inactivation. Experimental results showed that the tandem reaction was significantly more effective in sterilizing marine bacteria compared to single electrocatalytic or photocatalytic methods. Furthermore, boron doping was found to enhance the photocatalytic decomposition performance of H2O2.
Article
Chemistry, Physical
Minhe Li, Feng Zhou, Su Zhan
Summary: In this study, a photocatalyst Zn2SnO4 was produced and calcined at different temperatures. Characterization of the prepared photocatalyst was conducted using XRD, SEM, UV-Vis DRS, FT-IR and XPS. The antibacterial properties of the Zn2SnO4 coating were evaluated after replacing the fluorocarbon resin coating with the photocatalyst. The results showed that the sterilization rate of Zn2SnO4 was highest at 500 degrees C calcination, and the mechanism of improving photocatalytic efficiency was proposed. This research provides new insights into the development of marine antifouling coatings and has significant implications for treating marine ballast water.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2022)
Article
Chemistry, Physical
Chenglin Zhang, Qiuchen He, Su Zhan, Feng Zhou
Summary: This study established a ballast water treatment system that can efficiently inactivate marine microorganisms without the need for additional sacrificial agents. The introduction of AgQDs improved the photocatalytic sterilization efficiency, and it was found that AgQDs play multiple roles in facilitating charge transportation and generating robust oxygen species for bacterial inactivation.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Chemistry, Physical
Yanzhu Wang, Feng Zhou, Su Zhan, Jiahong Sun, Ruichao Xu
Summary: AgI/Bi2O2CO3 composite photocatalyst was prepared by in situ deposition and characterized by XRD, SEM, TEM, XPS, and UV-Vis diffuse reflectance spectroscopy (DRS). The sterilization performance of a fluorocarbon resin coating (PEVE) modified with photocatalysts of different composite proportions for ship ballast water was evaluated. The results showed that AgI/Bi2O2CO3-0.3 exhibited the best photocatalytic sterilization performance under simulated sunlight irradiation, with a sterilization rate of 98%. The AgI/Bi2O2CO3 heterojunction was successfully synthesized and the mechanism of photocatalytic sterilization involving holes as the main active species was explored. This paper provides a new idea for ship ballast water treatment.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2023)
Article
Chemistry, Physical
Ruichao Xu, Yang Qu, Ziming Zhao, Yanzhu Wang, Minhe Li, Feng Zhou
Summary: Due to the increase in global power consumption, energy supply shortage and global warming have become the main obstacles to social and economic development. Cleaner and greener energy, represented by solar energy, is being gradually developed in today's society to alleviate the current energy shortage. Semiconductor photocatalytic water splitting technology is one of the most important methods used for this purpose. However, global freshwater resources are scarce, and designing and synthesizing proper photocatalysts for seawater splitting has been considered as one of the most effective approaches to address the shortage of freshwater resources and utilize solar energy. In this study, quaternion Pt/Co3O4-NiS/STO composites were successfully synthesized and used for photocatalytic water splitting in a seawater system. The introduction of Pt and Co3O4 cocatalysts greatly improved the separation efficiency of photogenerated electrons and holes. Additionally, the surface modification of NiS enabled the photocatalysts to resist the toxicity of chloride ions in seawater. The oxygen yield for seawater splitting was nearly double that of untreated samples and approximately half of that in pure water. This work demonstrated the feasibility of seawater splitting and provided guidance for future development of other photocatalytic seawater splitting systems.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Engineering, Environmental
Fengguang Wang, Su Zhan, Feng Zhou, Qiuchen He, Chenglin Zhang, Jianfu Lai, Yupeng Song
Summary: Studies have shown the favorable application of Bi-based semiconductor photocatalysts in environmental protection. This study synthesized Bi-based photocatalysts using the glycol-assisted solvothermal method and evaluated their effectiveness in purifying ship's ballast water and killing bacteria. The results demonstrated that the in-situ generation of Bi nanospherical particles within nanosheets of flower-ball-like (BiO)2CO3 resulted in the preparation of 3D-3D Bi/(BiO)2CO3 heterojunctions. The combined surface plasmon resonance effects of semimetallic Bi and (BiO)2CO3 promoted the photocatalytic killing of bacteria in ship's ballast water.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Fengguang Wang, Yupeng Song, Qiuchen He, Chenglin Zhang, Jianfu Lai, Su Zhan, Feng Zhou
Summary: Through surface modification of Bi2O2CO3 to improve its photocatalytic activity, g-C3N4/BOC heterojunction photocatalysts were successfully prepared, and their photocatalytic sterilisation activity was verified under simulated sunlight irradiation, showing excellent environmental catalytic stability. The 10CNB composite photocatalyst exhibited the highest photocatalytic sterilization activity, with a 5-fold increase compared to pure BOC photocatalyst and a 3.4-fold increase compared to pure g-C3N4 photocatalyst.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Chenglin Zhang, Yupeng Song, Qiuchen He, Fengguang Wang, Su Zhan, Feng Zhou
Summary: This study successfully synthesized BiQDs/BiVO4, with 3%BiQDs/BiVO4 exhibiting the highest photocatalytic sterilization efficiency under visible light irradiation with low concentration of H2O2 present in real seawater. The combination of BiQDs with BiVO4 showed a great potential for efficient decontamination of ballast water.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
