Issue 43, 2013
From the journal:

RSC Advances

Enhanced photocatalytic hydrogen generation from water by Ni(OH)2 loaded on Ni-doped δ-FeOOH nanoparticles obtained by one-step synthesis

Thomás da Silva Rocha,a   Eliandro Silva Nascimento,a   Adilson Cândido da Silva,b   Henrique dos Santos Oliveira,b   Eric Marsalha Garcia,c   Luiz Carlos Alves de Oliveira,b   Douglas Santos Monteiro,a   Mariandry Rodrigueza  and  Márcio César Pereira*a  

* Corresponding authors

a Instituto de Ciência, Engenharia e Tecnologia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 39803-371 Teófilo Otoni, Minas Gerais, Brazil
E-mail: mcpqui@gmail.com
Fax: +55 33 3522-6037
Tel: +55 33 3522-6037

b Departamento de Química, ICEx, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Minas Gerais, Brazil

c Universidade Federal de São João del Rei, Campus Sete Lagoas, 29800-000 Sete Lagoas, Minas Gerais, Brazil

Abstract

Ni(OH)2 loaded on Ni-doped δ-FeOOH photocatalysts were prepared by a simple and low-cost one-step precipitation method. The effect of Ni(OH)2 nanoparticles and Ni2+ doping on the photocatalytic hydrogen production rates by δ-FeOOH in aqueous suspension was investigated. The results showed that the photocatalytic H2-production activity of δ-FeOOH was significantly enhanced by doping with Ni2+ ions and by loading Ni(OH)2 on its surface. The maximum H2-production was obtained for the sample with 20 wt% Ni, which provided 5746 μmol h−1 g−1. This high photocatalytic H2-production is due to the combined effects of Ni2+ doping and Ni(OH)2 loaded on the δ-FeOOH surface. The Ni2+ doping increased the conductivity and charge transfer in δ-FeOOH, whereas the Ni(OH)2 improved the charge separation in the δ-FeOOH and, consequently, the photocatalytic H2-production activity.

Graphical abstract: Enhanced photocatalytic hydrogen generation from water by Ni(OH)2 loaded on Ni-doped δ-FeOOH nanoparticles obtained by one-step synthesis

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Article information

DOI
https://doi.org/10.1039/C3RA43561J
Article type
Paper
Submitted
11 Jul 2013
Accepted
21 Aug 2013
First published
21 Aug 2013

RSC Adv., 2013,3, 20308-20314

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Enhanced photocatalytic hydrogen generation from water by Ni(OH)2 loaded on Ni-doped δ-FeOOH nanoparticles obtained by one-step synthesis

T. D. S. Rocha, E. S. Nascimento, A. C. da Silva, H. D. S. Oliveira, E. M. Garcia, L. C. A. de Oliveira, D. S. Monteiro, M. Rodriguez and M. C. Pereira, RSC Adv., 2013, 3, 20308 DOI: 10.1039/C3RA43561J

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