化工新型材料

化工新型材料 ›› 2020, Vol. 48 ›› Issue (12) : 191-195. DOI: 10.19817/j.cnki.issn 1006-3536.2020.12.045

科学研究

球状AgCl/Bi₂WO₆光催化剂的合成及其光催化性能

作者信息 +

Synthesis and property of sphere-like AgCl/Bi₂WO₆ photocatalyst

Qin Liqin, Yang Huanggen, Liang Chunjie, Tao Pingfang

Author information +

文章历史 +

Received		Published
2020-06-28		2020-12-20
Issue Date	Revised Date
2021-01-21	2020-06-28

PDF

摘要

利用两步水相法合成球状AgCl/Bi₂WO₆光催化剂,其结构、形貌和性能分别用X射线衍射仪、扫描电镜、光电子能谱仪、紫外-可见光谱仪及荧光光谱仪等进行分析,以水中微污染物甲基橙(MO)的降解评价AgCl/Bi₂WO₆光催化剂的可见光催化活性及光催化降解机理。结果表明:产物是球状的AgCl/Bi₂WO₆纳米晶,且随着AgCl合量的增大,颗粒状越明显。当AgCl质量分数为70%时,直径为700～900nm,光催化活性最好。0.08g球状的AgCl/Bi₂WO₆纳米晶可见光催化降解甲基橙(200mL,8mg/L)溶液6min后降解率达到99.1%,是相同条件下Bi₂WO₆降解率的5.5倍。循环使用3次后降解率达91.95%。光催化降解MO溶液是通过·OH和Cl⁰氧化机制实现。

Abstract

The sphere-like AgCl/Bi₂WO₆ composite was synthesized via two hydrofacies process.The obtained samples were characterized by XRD,SEM,DRS,XPS and PL.The samples exhibited remarkable enhanced visible-light photocatalytic degradations of an aqueous solution of methyl orange(MO).The results revealed that the prepared samples was spherical nanocrystalline AgCl/Bi₂WO₆ with the diameter of 700～900nm.The sample obtained with the optimal theoretical AgCl quality ratio of 70% exhibited the highest photocatalytic activity.Under visible light of 6min,the degradation efficiency of samples was 99.1% in methyl orange (MO,200mL,8mg/L),which displayed photocatalytic activity were 5.5 times than that of Bi₂WO₆.The degradation rate of MO could reach 91.95% after cycled for three times.Photocatalytic mechanism investigations demonstrated that the degradation of MO over AgCl/Bi₂WO₆ under visible light was mainly via ·OH and Cl⁰ oxidation mechanism.

关键词

氯化银/钨酸铋 / 球状 / 光催化性能

Key words

AgCl/Bi₂WO₆ / sphere-like / photocatalytic activity

引用本文

引用格式 ▾

球状AgCl/Bi₂WO₆光催化剂的合成及其光催化性能[J]. 化工新型材料, 2020, 48(12): 191-195 DOI:10.19817/j.cnki.issn 1006-3536.2020.12.045

登录浏览全文

4963

注册一个新账户忘记密码

参考文献

原文顺序 | 出版日期 | 本文引用

[1] Xiao L B,Lin R B,Wang J,et al.A novel hollow-hierarchical structured Bi₂WO₆ with enhanced photocatalytic activity for CO₂ photoreduction[J].Journal of Colloid and Interface Science,2018,523(1):151-158.
[2] 郭丹,赵彬侠,高美莉,等.Bi₂WO₆催化剂的合成及光催化性能的研究[J].功能材料,2015,46(3):3055-3059.
[3] 王江飞,张静,王志猛.不同形貌Bi₂WO₆的可控合成及光催化机理研究[J].人工晶体学报,2018,47(7):1418-1423.
[4] Sun X J,Zhang H,Wei J Z,et al.Preparation of point-line Bi₂WO₆@TiO₂ nanowires composite photocatalysts with enhanced UV/visible-light-driven photocatalytic activity[J].Materials Science in Semiconductor Processing,2016,45:51-56.
[5] Zhang J L,Ma Z.Enhanced visible-light photocatalytic performance of Ag₃VO₄/Bi₂WO₆ heterojunctions in removing aqueous dyes and tetracycline hydrochloride[J].Journal of the Taiwan Institute of Chemical Engineers,2017,78:212-218.
[6] Wang Z L,Hu T P,Dai K,et al.Construction of Z-scheme Ag₃PO₄/Bi₂WO₆ composite with excellent visible-light photodegradation activity for removal of organic contaminants[J].Chinese Journal of Catalysis,2017,38(12):2021-2029.
[7] Zhao Y Y,Liang X H,Wang Y B,et al.Degradation and removal of ceftriaxone sodium in aquatic environment with Bi₂WO₆/g-C₃N₄ photocatalyst[J].Journal of Colloid and Interface Science,2018,523(1):7-17.
[8] Xue W J,Peng Z W,Huang D L,et al.In situ synthesis of visible-light-driven Z-scheme AgI/Bi₂WO₆ heterojunction photocatalysts with enhanced photocatalytic activity[J].Ceramics International,2019,45(5):6340-6349.
[9] Lu H D,Wang J X,Du Z Y,et al.In-situ anion-exchange synthesis AgCl/AgVO₃ hybrid nanoribbons with highly photocatalytic activity[J].Materials Letters,2015,157:231-234.
[10] Jonjana S,Phuruangrat A,Thongtem S,et al.Preparation and enhanced photocatalytic performance of AgCl/Bi₂MoO₆heterojunction[J].Materials Letters,2016,179(15):162-165.
[11] Guo J H,Shi H X,Huang X B,et al.AgCl/Ag₃PO₄:a stable Ag-based nanocomposite photocatalyst with enhanced photocatalytic activity for the degradation of parabens[J].Journal of Colloid and Interface Science,2018,515(1):10-17.
[12] Sun L L,Liu C Y,Li J Z,et al.Fast electron transfer and enhanced visible light photocatalytic activity by using poly-o-phenylenediamine modified AgCl/g-C₃N₄nanosheets[J].Chinese Journal of Catalysis,2019,40(1):80-94.
[13] Li J D,Yu C L,Fang W,et al.Preparation,characterization and photocatalytic performance of heterostructured AgCl/Bi₂WO₆ microspheres[J].Chinese Journal of Catalysis,2015,36:987-993.
[14] Jonjana S,Phuruangrat A,Ekthammathat N,et al.Precipitation-deposition of visible-light-driven AgCl/Bi₂WO₆ nanocomposites used for the removal of rhodamine B[J].Journal of Electronic Materials,2019,48(8):4789-4796.
[15] Zhu J L,Liu S M,Yang Q,et al.Fabrication of flower-like Ag@AgCl/Bi₂WO₆ photocatalyst and its mechanism of photocatalytic degradation[J].Colloids and Surfaces A:Physicochem Eng Aspects,2016,489:275-281.
[16] 安伟佳,田玲玉,芮玉兰,等.Ag@AgCl/Bi₂WO₆复合光催化剂的制备及可见光催化性能[J].材料导报(B),2019,33(6):1932-1938.
[17] 何云鹏,金雪阳,李文卓,等.Bi₂WO₆/UiO-66复合材料的制备及其光催化性能[J].无机化学学报,2019,35(6):996-1004.
[18] 梁喜珍,余荣清.光催化降解甲基橙的研究[J].化工时刊,2007,21(10):21-23.
[19] Cao J,Luo B,Lin H,et al.Visible light photocatalytic activity enhancement and mechanism of AgBr/Ag₃PO₄ hybrids for degradation of methyl orange[J].Journal of Hazardous Materials,2012,217-218(38):107-115.