Ag/Ag_(3)PO_(4)/TiO_(2)双异质结催化剂的制备及光催化性能研究  

Preparation of Ag/Ag_(3)PO_(4)/TiO_(2) Double Heterojunction Catalyst and Its Photocatalytic Performance

作　　者：马喜峰[1] MA Xifeng(College of Chemical Engineering,Shaanxi Institute of Technology,Xi′an 710300,China)

机构地区：[1]陕西国防工业职业技术学院化学工程学院,陕西西安710300

出　　处：《化学与生物工程》2021年第10期37-40,45,共5页Chemistry & Bioengineering

基　　金：陕西国防工业职业技术学院科研计划项目(Gfy21-26);陕西省教育厅科研计划项目(17JK0064);陕西省自然科学基础研究计划项目(2019JM-389)。

摘　　要：通过紫外光诱导将Ag纳米颗粒沉积在Ag_(3)PO_(4)/TiO_(2)上,构建了Ag/Ag_(3)PO_(4)/TiO_(2)双异质结催化剂,通过废水中残留非那西丁(PNT)降解实验探究其光催化性能。结果表明,在紫外光照射下,以Ag/Ag_(3)PO_(4)/TiO_(2)为催化剂,当Ag3PO4质量分数为10%、催化剂用量为0.5 g·L^(-1)、初始pH值为9.0、PNT初始浓度为20 mg·L^(-1)时,PNT的降解效果最好,降解率最高可达97%。光致发光光谱显示,Ag的沉积导致Ag_(3)PO_(4)/TiO_(2)的光催化性能明显增强,对光生电子的转移产生积极作用,对电子-空穴对的复合产生抑制作用。We deposited Ag nanoparticles on Ag_(3)PO_(4)/TiO_(2) by UV induction,and constructed Ag/Ag3PO4/TiO2 double heterojunction catalyst.Moreover,we investigated the photocatalytic performance by the degradation experiments of residual Phenacetin(PNT)in wastewater.The results show that the degradation effect of PNT is the best and the degradation rate is up to 97%under UV irradiation upon condition that Ag/Ag_(3)PO_(4)/TiO_(2) is adopted as a catalyst,and that the mass fraction of Ag_(3)PO_(4) is 10%,the catalyst amount is 0.5 g·L^(-1),the initial pH value is 9.0,and the initial concentration of PNT is 20 mg·L^(-1).Photoluminescence spectra show that the deposition of Ag leads to the obvious enhancement of the photocatalytic performance of Ag_(3)PO_(4)/TiO_(2),which plays a positive role in the transfer of photogenerated electrons,and inhibits the recombination of electron-hole pairs.

关 键 词：Ag/Ag_(3)PO_(4)/TiO_(2) 异质结 光催化性能 非那西丁(PNT) 

分 类 号：X787[环境科学与工程—环境工程]