Noble metal sandwich-like TiO2@Pt@C3N4 hollow spheres enhance photocatalytic performance

被引：37
作者：
Cai, Jiabai [1 ,2 ]
Wu, Xueqing [2 ]
Li, Yuehai [2 ]
Lin, Ye [2 ]
Yang, Hui [2 ]
Li, Shunxing [2 ,3 ]
机构：
[1] Xiamen Univ, Coll Environm & Ecol, Xiamen 361102, Peoples R China
[2] Minnan Normal Univ, Coll Chem & Environm, Zhangzhou 363000, Peoples R China
[3] Minnan Normal Univ, Fujian Prov Key Lab Modern Analyt Sci & Separat T, Zhangzhou 363000, Peoples R China
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2018年 / 514卷
基金：
中国国家自然科学基金;
关键词：
Double-shelled nanocomposite; Visible-light-driven photocatalysis; Pollution treatment; CARBON NITRIDE STRUCTURE; ORGANIC POLLUTANTS; EFFICIENT PHOTOCATALYST; TIO2; NANOFIBERS; NANOCOMPOSITE; PHOTODEGRADATION; MICROSPHERES; OXIDATION; NANOPARTICLES; G-C3N4/TIO2;
D O I：
10.1016/j.jcis.2018.01.011
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The goal of this work was to assess the performance of Pt nanoparticles (NPs) as co-catalysts on the photocatalytic activity of TiO2@Pt@C3N4 hollow spheres, which was tested by photodegrading rhodamine B and methyl blue under visible light irradiation. TiO2@Pt@C3N4 composites were fabricated by using modified polystyrene balls as templates, hydrothermal reactions, and calcination. Under simulated sunlight irradiation, photocatalytic activity was in the following of TiO2@Pt@C3N4 > TiO2@C3N4 > C3N4 > P25. The photo-conversion rate of the TiO2@Pt@C3N4 increased significantly relative to TiO2@C3N4 and the others. The combination of TiO2 and C3N4, as well as the sandwiched of Pt NPs reduce electron-hole recombination as a result of having an electron trap site, which can store and shuttle photo-generated electrons, and enhance photo-generation of active radicals. Electron paramagnetic resonance (EPR) spectroscopy, as well as photo-luminescence (PL), and electrochemical measurements were taken to verify this conclusion. Considering the multi-functional combination of precious metals and semiconductor materials, this work may provide new ideas for the design of high-performance catalysts. (C) 2018 Elsevier Inc. All rights reserved.
引用
收藏
页码：791 / 800
页数：10
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