scholarly journals A novel 2D graphene oxide modified α-AgVO3 nanorods: Design, fabrication, and enhanced visible-light photocatalytic performance

2022 ◽  
Vol 11 (2) ◽  
pp. 308-320
Author(s):  
Jian Wu ◽  
Liangyu Li ◽  
Xing-ao Li ◽  
Xin Min ◽  
Yan Xing
Keyword(s):  
Graphene Oxide ◽  
Visible Light ◽  
Photocatalytic Performance ◽  
Light Response ◽  
Reaction Rate Constant ◽  
First Principles Calculations ◽  
Solar Absorption ◽  
Apparent Reaction Rate Constant ◽  
Apparent Reaction Rate

AbstractSilver vanadates are promising visible-light-responded photocatalysts with suitable bandgap for solar absorption. However, the easy recombination of photogenerated carriers limits their performance. To overcome this obstacle, a novel 2D graphene oxide (GO) modified α-AgVO3 nanorods (GO/α-AgVO3) photocatalyst was designed herein to improve the separation of photocarriers. The GO/α-AgVO3 was fabricated through a facile in-situ coprecipitation method at room temperature. It was found that the as-prepared 0.5 wt% GO/α-AgVO3 exhibited the most excellent performance for rhodamine B (RhB) decomposition, with an apparent reaction rate constant 18 times higher than that of pure α-AgVO3 under visible-light irradiation. In light of the first-principles calculations and the hetero junction analysis, the mechanism underpinned the enhanced photocatalytic performance was proposed. The enhanced photocatalytic performance was ascribed to the appropriate bandgap of α-AgVO3 nanorods for visible-light response and efficient separation of photocarriers through GO nanosheets. This work demonstrates the feasibility of overcoming the easy recombination of photogenerated carriers and provides a valuable GO/α-AgVO3 photocatalyst for pollutant degradation.

scholarly journals A Novel 2D Graphene Oxide Modified α-AgVO3 Nanorods: Design, Fabrication and Enhanced Visible-Light Photocatalytic Performance

2021 ◽  
Author(s):  
Yan Xing ◽  
Jian WU ◽  
Xin MIN ◽  
Xingao LI
Keyword(s):  
Graphene Oxide ◽  
Visible Light ◽  
Photocatalytic Performance ◽  
Light Response ◽  
Reaction Rate Constant ◽  
First Principles Calculations ◽  
Solar Absorption ◽  
In Suit ◽  
Apparent Reaction Rate Constant ◽  
Apparent Reaction Rate

Abstract Silver vanadates are promising visible-light-responded photocatalysts with suitable bandgap for solar absorption. However, the easy recombination of photogenerated carriers limits their performance. To overcome this obstacle, a novel 2D graphene oxide (GO) modified α-AgVO3 nanorods (GO/α-AgVO3) photocatalyst was designed herein to improve the separation of photocarriers. The GO/α-AgVO3 was fabricated through a facile in-suit coprecipitation method at room temperature. It was found that the as-prepared 0.5 wt.% GO/α-AgVO3 exhibited the most excellent performance for Rhodamine B (RhB) decomposition, with an apparent reaction rate constant 18 times higher than that of pure α-AgVO3 under visible-light irradiation. In light of the first-principles calculations and the heterojunction analysis, the mechanism underpinned the enhanced photocatalytic performance was proposed. The enhanced photocatalytic performance was ascribed to the appropriate bandgap of α-AgVO3 nanorods for visible light response and efficient separation of photocarriers through GO nanosheets. This work demonstrates the feasibility of overcoming the easy recombination of photogenerated carriers and provides a valuable GO/α-AgVO3 photocatalyst for pollutant degradation.

scholarly journals Enhanced Heterogeneous Photodegradation of Organic Pollutants by a Visible Light Harvesting CoO@meso–CN@MoS2 Nanocomposites

Catalysts ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 722
Author(s):  
Linjer Chen ◽  
Thanh Binh Nguyen ◽  
Yi-Li Lin ◽  
Chung-Hsin Wu ◽  
Jih-Hsing Chang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Visible Light ◽  
Reaction Rate ◽  
Weight Ratio ◽  
Reaction Rate Constant ◽  
Pollutant Degradation ◽  
New Approach ◽  
Apparent Reaction Rate Constant ◽  
Apparent Reaction Rate

Developing simple and effective synthetic strategies regarding the formation of heterostructure photocatalytic semiconductors remains an intense challenge in research matters. Uniform heterostructure cobalt oxide@meso–CN@MoS2 (CoO@meso–CN@MoS2) photocatalyst exhibits excellent photocatalytic redox performance for pollutant degradation under visible light. By adjusting the weight ratio of CoO@meso–CN and MoS2, we fabricated a CoO@meso–CN@MoS2 heterostructure photocatalyst, and the established heterostructure between CoO@meso–CN and MoS2 was indicated by various physicochemical and morphological characterizations. The photocatalytic response to the fabricated hybrid was determined by rodamine B (RhB), methylene blue (MB), and congo red (CR) degradation in aqueous solution under visible light, and the nanocomposites with a slight content consisting of CoO@meso–CN achieved better catalysis than pure MoS2. This finding confirmed the propriety of this heterostructure as a valuable photocatalyst. The experimental results demonstrated that the apparent reaction rate constant of the 3 wt% CoO@meso–CN modified MoS2 was about two times higher than that of pure MoS2. The present work serves as a new approach for designing highly efficient visible light-induced heterostructure-based photocatalysts for environmental applications in the future.

scholarly journals Synthesis of MgFe2O4/Reduced Graphene Oxide Composite and Its Visible-Light Photocatalytic Performance for Organic Pollution

2018 ◽  
Vol 2018 ◽  
pp. 1-5 ◽  
Author(s):  
Fengmin Wu ◽  
Wenlu Duan ◽  
Mei Li ◽  
Hang Xu
Keyword(s):  
Electron Microscopy ◽  
Graphene Oxide ◽  
Visible Light ◽  
Reduced Graphene Oxide ◽  
Photocatalytic Performance ◽  
Light Response ◽  
Organic Pollution ◽  
Reduced Graphene ◽  
Potential Applications ◽  
Electron Hole Pair

Recently, binary metal oxides have been proven to be the most investigated semiconductors due to their high activity for the removal of organic pollutants. In this paper, to improve the photocatalytic efficiency of MgFe2O4, a MgFe2O4/reduced graphene oxide (MFO/rGO) photocatalyst was synthesized by a facile generalized solvothermal method. The morphology, structure, and photocatalytic activities in the degradation of methyl orange (MO) reaction were systematically characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and UV-vis absorption spectroscopy, respectively. The results showed that the MFO/rGO composite exhibited enhanced photocatalytic performance in the photodegradation of MO under visible-light irradiation and reached a maximum degradation rate of 99% within 60 min of irradiation. This excellent photocatalytic performance is attributed to the introduction of rGO in the composite, which can effectively reduce the photoproduction of the electron-hole pair recombination rate. The excellent photocatalytic activity reveals that the MFO/rGO composite photocatalyst is a promising photocatalyst with good visible-light response and has potential applications in the field of water treatment.

scholarly journals In situ formation of 2-thiobarbituric acid incorporated g-C3N4 for enhanced visible-light-driven photocatalytic performance

RSC Advances ◽  
2021 ◽  
Vol 11 (34) ◽  
pp. 21084-21096
Author(s):  
Tingting Chen ◽  
Shan Hu ◽  
Quanfeng Xing ◽  
Xiaofeng Yu ◽  
Jinming Chen ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Performance ◽  
Light Response ◽  
Thiobarbituric Acid ◽  
Efficient Strategy ◽  
Visible Light Driven ◽  
In Situ Formation

Embedding heterocycles into the skeleton of g-C3N4 has been proved to be a simple and efficient strategy for improving light response and the separation of photo-excited charges.

Solution Processed Sb2S3-based Photocathode with Enhanced Photocatalytic Performance via Constructing Ultrathin TiO2 Overlayer and Noble Metal Modification

2021 ◽  
Author(s):  
Yanwen Wang ◽  
Rong Liang ◽  
Chao Qin ◽  
Lei Ren ◽  
Zhizhen Ye ◽  
...  
Keyword(s):  
Visible Light ◽  
Noble Metal ◽  
Photocatalytic Performance ◽  
Low Cost ◽  
Light Response ◽  
Solution Processed ◽  
Antimony Sulfide ◽  
Visible Light Response ◽  
Absorbing Material

Antimony sulfide (Sb2S3) is a light absorbing material with strong visible light response, which is suitable for efficient and low-cost photoelectrodes. Nano-structured films have unique advantages in constructing photoelectrodes due...

In situ construction of WO3/g-C3N4 composite photocatalyst with 2D–2D heterostructure for enhanced visible light photocatalytic performance

2019 ◽  
Vol 43 (44) ◽  
pp. 17416-17422 ◽  
Author(s):  
Huaqiang Zhuang ◽  
Zhenping Cai ◽  
Wentao Xu ◽  
Mianli Huang ◽  
Xiaobin Liu
Keyword(s):  
Visible Light ◽  
Photocatalytic Performance ◽  
Composite Photocatalyst ◽  
Preparation Strategy ◽  
Visible Light Photocatalytic

A WO3/g-C3N4 composite photocatalyst with 2D–2D heterostructure was designed and constructed by an in situ preparation strategy.

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