热处理对掺锡TiO纳米材料的锐钛矿-金红石相转变及光催化活性的影响。

The effect of heat treatment on the anatase-rutile phase transformation and photocatalytic activity of Sn-doped TiO nanomaterials.

作者信息

Zhu Xiaodong, Han Shihu, Feng Wei, Kong Qingquan, Dong Zhihong, Wang Chenxi, Lei Jiahao, Yi Qian

机构信息

College of Mechanical Engineering, Chengdu University Chengdu 610106 China

College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology Chengdu 610059 China.

出版信息

RSC Adv. 2018 Apr 17;8(26):14249-14257. doi: 10.1039/c8ra00766g.

DOI:10.1039/c8ra00766g

PMID:35540772

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9079907/

Abstract

Sn-doped TiO nanomaterials with different amounts of Sn (1, 2.5, 5, 10, and 15 at%) were prepared by a sol-gel method and characterized by XRD, TG, DTA, EDS, XPS, DRS, SEM, BET, and PL. The photocatalytic activity of the prepared samples was investigated by measuring the degradation of rhodamine B in aqueous solution under UV light. The experimental results indicate that doping with Sn promotes phase transformation from anatase to rutile. The photocatalytic activity of TiO is influenced by both the heat treatment temperature and the Sn doping concentration. 1% Sn-TiO exhibits the highest degradation rate at 350 °C and 5% Sn-TiO exhibits the best photocatalytic activity at 500 °C and 650 °C. The enhancement of the photocatalytic activity can be ascribed to a larger surface area and a better hydration ability, as well as less recombination of the photogenerated pairs.

摘要

采用溶胶-凝胶法制备了不同Sn含量（1%、2.5%、5%、10%和15%原子分数）的Sn掺杂TiO纳米材料，并通过XRD、TG、DTA、EDS、XPS、DRS、SEM、BET和PL对其进行了表征。通过测量罗丹明B在紫外光下在水溶液中的降解情况，研究了所制备样品的光催化活性。实验结果表明，Sn掺杂促进了从锐钛矿到金红石的相变。TiO的光催化活性受热处理温度和Sn掺杂浓度的影响。1%Sn-TiO在350℃时表现出最高的降解率，5%Sn-TiO在500℃和650℃时表现出最佳的光催化活性。光催化活性的提高可归因于更大的表面积和更好的水合能力，以及光生载流子对的复合减少。