Nanotube-confinement induced size-controllable g-C3N4 quantum dots modified single-crystalline TiO2 nanotube arrays for stable synergetic photoelectrocatalysis

被引：351

作者：

Li, Guisheng ^{[1
]}

Lian, Zichao ^{[1
]}

Wang, Wenchao ^{[1
]}

Zhang, Dieqing ^{[1
]}

Li, Hexing ^{[1
,2
]}

机构：

[1] Shanghai Normal Univ, Shanghai Key Lab Rare Earth Funct Mat, Minist Educ, Key Lab Resource Chem, Shanghai 200234, Peoples R China

[2] Shanghai Univ Elect Power, Shanghai 200090, Peoples R China

来源：

NANO ENERGY | 2016年 / 19卷

基金：

中国国家自然科学基金;

关键词：

g-C3N4 quantum dots; TiO2-NTAs; Photoelectrocatalytic; H-2; evolution; Pollutant degradation; PHOTOCATALYTIC DEGRADATION; WATER; HYDROGEN; NANOPARTICLES; SILVER; ARCHITECTURES; ELECTRODES; NANOSHEETS; EVOLUTION; CATALYST;

D O I：

10.1016/j.nanoen.2015.10.011

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：

Size-controllable g-C3N4 quantum dots (QDs) were in-situ synthesized and grafted onto single crystalline TiO2 nanotube arrays (TiO2-NTAs) based on nanotube-confinement effect. This photoelectrocatalyst exhibited high activity in synergetic H-2 evolution and organic pollutant degradation. The g-C3N4 QDs, together with TiO2-NTAs due to multiple light reflections, promoted light harvesting owing to the narrow energy band gap and upconversion from quantum size effect of g-C3N4 QDs. Meanwhile, the single-crystal TiO2 in-situ formed during the g-C3N4 synthesis process favored the photoelectron transfer, and the g-C3N4/TiO2 heterojunctions further promoted separation of photoelectrons from holes. Moreover, the strong g-C3N4-TiO2 interaction and the confinement effect of TiO2 nanotubes efficiently inhibited self-gathering and leaching of g-C3N4 QDs, leading to excellent stability in photoelectrocatalysis. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：446 / 454

页数：9

共 46 条

[1] Toward Enhanced Photocatalytic Oxygen Evolution: Synergetic Utilization of Plasmonic Effect and Schottky Junction via Interfacing Facet Selection [J].