Hollow Sr/Rh-codoped TiO2 photocatalyst for efficient sunlight-driven organic compound degradation

被引：18
作者：
Chinh-Chien Nguyen [1 ]
Cao-Thang Dinh [2 ]
Trong-On Do [1 ]
机构：
[1] Univ Laval, Dept Chem Engn, Quebec City, PQ G1V 0A8, Canada
[2] Univ Toronto, Dept Elect & Comp Engn, Toronto, ON M5S 1A4, Canada
来源：
RSC ADVANCES | 2017年 / 7卷 / 06期
基金：
加拿大自然科学与工程研究理事会;
关键词：
VISIBLE-LIGHT IRRADIATION; RUTILE TIO2; WATER; ANATASE; NANOPARTICLES; OXYGEN; PHOTOACTIVITY; NANOCOMPOSITE; COCATALYSTS; POLLUTANTS;
D O I：
10.1039/c6ra25987a
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Sunlight-driven photocatalysis has emerged as a potential technology to address organic pollutant issues. Here, we report the first Rh-doped hollow-structured TiO2 photocatalyst, which is highly active in the photocatalytic decomposition of organic pollutants under solar light. We achieved this by introducing Sr2+ as a co-doping agent, which stabilized the hollow structure at high temperatures and enabled us to control the oxidation state of Rh. The designed photocatalyst exhibited strong visible light absorption (up to 600 nm), and a very high surface area (up to 140 m(2) g(-1)). As a result, the Sr/Rh-doped TiO2 hollow photocatalysts demonstrated a photocatalytic efficiency (PE) of 0.242%, which was at least 8 times higher than that of commercial TiO2 (0.03%) and 25 times higher than that of bulk Sr/Rh-TiO2 (0.01%), in the photocatalytic decomposition of isopropanol under solar light irradiation.
引用
收藏
页码：3480 / 3487
页数：8
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