化工新型材料

化工新型材料 ›› 2023, Vol. 51 ›› Issue (1) : 209-214. DOI: 10.19817/j.cnki.issn1006-3536.2023.01.040

科学研究

银掺杂TiO₂可见光催化剂的制备与表征

作者信息 +

Preparation and characterization of silver doped titanium dioxide visible lighted photocatalyst

Shi Hongyu, Li Jianmin, Zhang Shili, Luo Lijun, Li Guizhen, Wang Hongbin, Yang Min

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Received		Published
2021-09-11		2023-01-20
Issue Date	Revised Date
2023-02-02	2021-09-11

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摘要

制备了Ag掺杂二氧化钛可见光催化剂(Ag/TiO₂),优化了Ag掺杂量、焙烧温度、焙烧时间等制备条件,采用SEM、EDS、XRD、FT-IR、TGA等对Ag/TiO₂进行了表征。结果表明,在Ag掺杂量为1.0%、焙烧温度800℃、焙烧时间3h的优化条件下,Ag/TiO₂在可见光下降解40mg/L的亚甲基蓝,降解率达到了96.85%,与TiO₂在紫外光条件下的光催化降解相当。表征结果表明,Ag被成功地掺杂到了粒子表面,且在TiO₂的表面缔合,这有效地拓宽了TiO₂在可见光区的吸收,增强了Ag/TiO₂光催化剂的光谱响应,大幅度提高了Ag/TiO₂在可见光下的催化活性。

Abstract

A kind of visible light photocatalyst (Ag/TiO₂) doped with silver were prepared firstly.Next,the photocatalytic activity of Ag/TiO₂ was evaluated by the degradation rate of methylene blue.After that,preparation conditions such as the amount of silver doping,calcined temperature and time were optimized.Finally,the Ag/TiO₂ was characterized by SEM,EDS,XRD,FT-IR and TGA.The results showed that the degradation rate of 40mg/L methylene blue degraded by Ag/TiO₂ in visible light reached 96.85% under the optimal conditions of 1.0% Ag doping,calcined temperature 800℃ and calcined time 3h,which was equivalent to the photocatalytic degradation of TiO₂ under ultraviolet light.The results showed that silver was successfully doped onto the surface of particles and associated on the surface of TiO₂,which effectively widened the absorption of TiO₂ in visible light region,enhanced the spectral response of Ag/TiO₂ photocatalyst,and greatly improved the catalytic activity of Ag/TiO₂ under visible light.

关键词

银掺杂 / 二氧化钛 / 光催化 / 亚甲基蓝降解

Key words

silver doping / TiO₂ / visible light photocatalyst / methylene blue degradation

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银掺杂TiO₂可见光催化剂的制备与表征[J]. 化工新型材料, 2023, 51(1): 209-214 DOI:10.19817/j.cnki.issn1006-3536.2023.01.040

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