Photoactivity of S-doped nanoporous activated carbons: A new perspective for harvesting solar energy on carbon-based semiconductors

被引：83

作者：

Bandosz, Teresa J. ^{[1
,2
]}

Matos, Juan ^{[3
]}

Seredych, Mykola ^{[1
,2
]}

Islam, M. S. Z. ^{[4
]}

Alfano, R. ^{[4
]}

机构：

[1] CUNY City Coll, Dept Chem, New York, NY 10031 USA

[2] CUNY City Coll, CUNY Energy Inst, New York, NY 10031 USA

[3] Venezuelan Inst Sci Res IVIC, Engn Mat & Nanotechnol Ctr, Caracas 1020A, Venezuela

[4] CUNY City Coll, IUIL, Dept Phys, New York, NY 10031 USA

来源：

APPLIED CATALYSIS A-GENERAL | 2012年 / 445卷

基金：

美国国家科学基金会;

关键词：

S-doped activated carbon; Photoactivity; Photocurrent; Photocatalysis; GRAPHENE OXIDE; METHYLENE-BLUE; BAND-GAP; TIO2; ADSORPTION; NITROGEN; PHASE; PHOTOCATALYST; DEGRADATION; IRRADIATION;

D O I：

10.1016/j.apcata.2012.08.020

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：

Photoactivity of S-doped nanoporous carbons was tested using photocurrent generation, cyclic voltammetry and photodegradation of methylene blue (MB) under artificial solar irradiation. The results were compared to those obtained on unmodified carbons and on commercial TiO2. A significant generation of photocurrent at visible and NIR radiation from 400 to 1200 nm was found. An exposure to ambient light has a strong effect on an open circuit potential indicating the strong activity of S-doped carbons in oxidation reactions. The activity in the process of MB degradation was about 2.2 and 1.9 higher than that obtained on a commercial TiO2. The extent of photoactivity depends both on the composition of the activated carbon and on the sulfur content. The results suggest that incorporation of sulfur decreases the energy band gap in activated carbon. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：159 / 165

页数：7

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