Synergy of Low-Energy {101} and High-Energy {001} TiO2 Crystal Facets for Enhanced Photocatalysis

被引：462

作者：

Roy, Nitish ^{[1
]}

Sohn, Youngku ^{[2
]}

Pradhan, Debabrata ^{[1
]}

机构：

[1] Indian Inst Technol, Ctr Mat Sci, Kharagpur 721302, W Bengal, India

[2] Yeungnam Univ, Dept Chem, Kyongsan 712749, Gyeongbuk, South Korea

来源：

ACS NANO | 2013年 / 7卷 / 03期

基金：

新加坡国家研究基金会;

关键词：

TIO2; nanocrystals; facets control; photocatalysis; oxidation site; reduction site; ANATASE TIO2; NANOTUBE ARRAYS; HYDROGEN-PRODUCTION; SENSITIZED TIO2; TITANIA ANATASE; NANOPARTICLES; PERCENTAGE; NANOCRYSTALS; ENERGETICS; NANOSHEETS;

D O I：

10.1021/nn305877v

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Controlled crystal growth determines the shape, size, and exposed facets of a crystal, which usually has different surface physicochemical properties. Herein we report the size and facet control synthesis of anatase TiO2 nanoaystals (NCs). The exposed facets are found to play a crucial role In the photocatalytic activity of TiO2 NCs. This is due to the known preferential flow of photogenerated carriers to the specific facets. Although, In recent years, the main focus has been on increasing the surface area of high-energy exposed facets such as {001} and {100} to improve the photocatalytic activity, here we demonstrate that the presence of both the high-energy {001} oxidative and low-energy {101} reductive facets in an optimum ratio is necessary to reduce the charge recombination and thereby enhance photocatalytic activity of TiO2 NCs.

引用

页码：2532 / 2540

页数：9

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