Z-scheme V2O5-Ag2O/g-C3N4异质结制备及其可见光催化性能

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (1092 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract V₂O₅ was prepared by in-situ synthesized method, and then composited with Ag₂O/g-C₃N₄ by hydrothermal method to produce V₂O₅-Ag₂O/g-C₃N₄ photocatalysts. The morphology and optical properties of the as-prepared samples were characterized by XRD, FT-IR, SEM and UV-Vis DRS. The results showed that V₂O₅ was successfully doped on the surface of Ag₂O/g-C₃N₄, and the visible-light absorption range of V₂O₅-Ag₂O/g-C₃N₄ composites were broadened compared to Ag₂O/g-C₃N₄. The degradation efficiency of methylene blue (MB) by 15% V₂O₅-Ag₂O/g-C₃N₄ composites reached 99.10% after 180min of visible-light irradiation. The degradation efficiency of MB was above 85% by the composites after 3cycles of degradation, which revealed that V₂O₅-Ag₂O/g-C₃N₄ composites had excellent stability. The quenching tests of radicals indicated that holes (h⁺) was the main active species during the photocatalytic reaction process. The p-n heterojunction at the interface of Ag₂O and g-C₃N₄ was formed, and the recombination process of Ag₂O and V₂O₅ followed Z-scheme visible-light-driven mechanism, which effectively hindered the recombination of photogenerated electron-hole pairs and promoted the production of active species, thus, enhancing the photocatalytic activity of composites.

Key words： V₂O₅ Ag₂O/g-C₃N₄ ternary photocatalyst visible light heterojunction

Received: 22 May 2020

PACS:

X703

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	ZHANG Cong
	WANG Can
	ZHAO Xin
	PAN Shuang

Cite this article:

ZHANG Cong,WANG Can,ZHAO Xin等. Fabrication and visible-light photocatalytic performance of Z-scheme V₂O₅-Ag₂O/g-C₃N₄ heterostructure[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(1): 185-191.

URL:

http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I1/185

[1]	朱红庆,杨兵,魏世强,等.微米SiC/石墨烯复合物光催化降解罗丹明B[J]. 环境科学, 2020,41(2):756-762. Zhu H Q, Yang B, Wei S Q, et al. Photocatalytic degradation of rhodamine B with micro-SiC/graphene composite under visible light irradiation[J]. Environmental Science, 2020,41(2):756-762.
[2]	Li N, Gao H, Wang X, et al. Novel indirect Z-scheme g-C3N4/Bi2MoO6/Bi hollow microsphere heterojunctions with SPR-promoted visible absorption and highly enhanced photocatalytic performance[J]. Chinese Journal of Catalysis, 2020,41(3):426-434.
[3]	Chen X Y, Kuo D H, Hou Y X. Enhancing the photodegradation of charged pollutants under visible light in Ag2O/g-C3N4catalyst by Coulombic interaction[J]. Journal of Materials Science, 2017,52(9):5147-5154.
[4]	Tang M L, Ao Y H, Wang P F, et al. All-solid-state Z-scheme WO3 nanorod/ZnIn2S4composite photocatalysts for the effective degradation of nitenpyram under visible light irradiation[J]. Journal of Hazardous Materials, 2020,387:1-10.
[5]	郭梅,任学昌,王建钊,等.TiO2/pg-C3N4复合催化剂的制备及光催化性能[J]. 中国环境科学, 2019,39(12):5119-5125. Guo M, Ren X C, Wang J Z, et al. Preparation and photocatalytic properties of TiO2/pg-C3N4composite photocatalyst[J]. China Environmental Science, 2019,39(12):5119-5125.
[6]	Tang G G, Zhang F X, Huo P W, et al. Constructing novel visiblelight-driven ternary photocatalyst of AgBr nanoparticles decorated 2D/2D heterojunction of g-C3N4/BiOBr nanosheets with remarkably enhanced photocatalytic activity for water-treatment[J]. Journal of Hazardous Materials, 2019,45:19197-19205.
[7]	Ren H T, Jia S Y, Wu Y, et al. Improved photochemical reactivities of Ag2O/g-C3N4 in phenol degradation under UV and visible light[J]. Industrial & Engineering Chemistry Research, 2014,53:17645-17653.
[8]	Hong Y Z, Jiang Y H, Li C S, et al. In-situ synthesis of direct solid-state Z-scheme V2O5/g-C3N4heterojunctions with enhanced visible light efficiency in photocatalytic degradation of pollutants[J]. Applied Catalysis B:Environmental, 2016,180:663-673.
[9]	Dadigala R, Bandi R, Gangapuram B R, et al. Fabrication of novel 1D/2D V2O5/g-C3N4 composites as Z-scheme photocatalysts for CR degradation and Cr (VI) reduction under sunlight irradiation[J]. Journal of Environmental Chemical Engineering, 2019,7(1):1-11.
[10]	Zhang L L, Xiao X Y, Li Y, et al. Enhanced photocatalytic activity of TiO2 nanoparticles using WS2/g-C3N4 hybrid as co-catalyst[J]. Transactions of Nonferrous Metals Society of China, 2017,27(5):1117-1126.
[11]	Qian L, Hou Y P, Yu Z B, et al. Metal-induced Z-scheme CdS/Ag/g-C3N4photocatalyst for enhanced hydrogen evolution under visible light:The synergy of MIP effect and electron mediator of Ag[J]. Molecular Catalysis, 2018,458:43-51.
[12]	Shi W L, Li M Y, Huang X L, et al. Three-dimensional Z-scheme Ag3PO4/Co3(PO4)2@Ag heterojunction for improved visible-light photocatalytic degradation activity of tetracycline[J]. Journal of Alloys and Compounds, 2020,818:1-10.
[13]	Liu J, Xia H, Xue D F, et al. Double-shelled nanocapsules of V2O5-based composites as high-performance anode and cathode materials for Li ion batteries[J]. Journal of the American Chemical Society, 2009,131(34):12086-12087.
[14]	Bhaskaruni S, Maddila S, van Zyl W, et al. V2O5/ZrO2 as an efficient reusable catalyst for the facile, green, one-pot synthesis of novel functionalized 1,4-dihydropyridine derivatives[J]. Catalysis Today, 2018,309:276-281.
[15]	赵洪飞,陈林,贺凤婷,等.碳纳米管/BiOBr复合材料的制备及其光催化性能[J]. 中国环境科学, 2019,39(11):4704-4711. Zhao H F, Chen L, He F T, et al. Preparation and photocatalytic property of carbon nanotubes/BiOBr composite[J]. China Environmental Science, 2019,39(11):4704-4711.
[16]	Chen X J, Yu C M, Zhu R L, et al. Photocatalytic performance and mechanism of Z-Scheme CuBi2O4/Ag3PO4 in the degradation of diclofenac sodium under visible light irradiation:Effects of pH, H2O2, and S2O82-[J]. Science of the Total Environment, 2020,711:1-12.
[17]	王新,熊巍,王金,等.AgInS2/g-C3N4复合材料光催化降解邻二氯苯性能[J]. 中国环境科学, 2019,39(11):4697-4703. Wang X, Xiong W, Wang J, et al. Photocatalytic degradation of o-dichlorobenzene by AgInS2/g-C3N4 composites[J]. China Environmental Science, 2019,39(11):4697-4703.
[18]	Mousavi M, Habibi-Yangjeh A, Seifzadeh D. Novel ternary g-C3N4/Fe3O4/MnWO4 nanocomposites:Synthesis, characterization, and visible-light photocatalytic performance for environmental purposes[J]. Journal of Materials Science & Technology, 2018,34(9):1638-1651.
[19]	Kang J, Jin C Y, Li Z L, et al. Dual Z-scheme MoS2/g-C3N4/Bi24O31Cl10 ternary heterojunction photocatalysts for enhanced visible-light photodegradation of antibiotic[J]. Journal of Alloys and Compounds, 2020,825:1-34.
[20]	Yang S B, Xu D B, Chen B Y, et al. In-situ synthesis of a plasmonic Ag/AgCl/Ag2O heterostructures for degradation of ciprofloxacin[J]. Applied Catalysis B:Environmental, 2017,204:602-610.
[21]	Sun C Y, Xu Q H, Xie Y, et al. High-efficient one-pot synthesis of carbon quantum dots decorating Bi2MoO6 nanosheets heterostructure with enhanced visible-light photocatalytic properties[J]. Journal of Alloys and Compounds, 2017,723:333-344.
[22]	Chang F, Zheng J J, Wang X F, et al. Heterojuncted non-metal binary composites silicon carbide/g-C3N4 with enhanced photocatalytic performance[J]. Materials Science in Semiconductor Processing, 2018,75:183-192.
[23]	Wang C L, Hu L M, Chai B, et al. Enhanced photocatalytic activity of electrospun nanofibrous TiO2/g-C3N4 heterojunction photocatalyst under simulated solar light[J]. Applied Surface Science, 2018,430:243-252.
[24]	Jiang Z F, Xie J M. In situ growth of Ag/Ag2O nanoparticles on g-C3N4 by a natural carbon nanodot-assisted green method for synergistic photocatalytic activity[J]. RSC Advance, 2016,6(4):3186-3197.
[25]	彭小明,罗文栋,胡玉瑛,等.磷掺杂的介孔石墨相氮化碳光催化降解染料[J]. 中国环境科学, 2019,39(8):3277-43285. Peng X M, Luo W D, Hu Y Y, et al. Study on the photocatalytic degradation of dyes by phosphorus doped mesoporous graphite carbon nitride[J]. China Environmental Science, 2019,39(8):3277-43285.
[26]	Meng X C, Zhang Z S. Bi2MoO6co-modified by reduced graphene oxide and palladium (Pd2+ and Pd0) with enhanced photocatalytic decomposition of phenol[J]. Applied Catalysis B:Environmental, 2017,209:383-393.
[27]	Ding X, Ho W K, Shang J. Self doping promoted photocatalytic removal of no under visible light with Bi2MoO6:Indispensable role of superoxide ions[J]. Applied Catalysis B:Environmental, 2016,182:316-325.
[28]	Tian W H, Wu H Y, Su C Y, et al. Heterostructure based on silver/silver chloride nanocubes loaded titanium dioxide nanofibers:A high-efficient and recyclable visible light-responsive photocatalyst[J]. Journal of Photochemistry and Photobiology A:Chemistry, 2018,350:122-129.
[29]	Yang Z M, Deng C H, Ding Y H, et al. Eco-friendly and effective strategy to synthesize ZnO/Ag2O heterostructures and its excellent photocatalytic property under visible light[J] Journal of Solid State Chemistry, 2018,268:83-93.