期刊
JOURNAL OF NANOPARTICLE RESEARCH
卷 15, 期 6, 页码 -出版社
SPRINGER
DOI: 10.1007/s11051-013-1661-y
关键词
Sb2WO6; Photo-reduction property; Azo compound; Hierarchical architecture
资金
- National Natural Science Foundation of China [21003022, 21177024, 21273036]
- National Key Basic Research Program of China (973 Program) [2011CB612314]
- Natural Science Foundation of Fujian Province [2011J01041]
- Science and Technology Project of Education Office of Fujian Province of P.R. China [JA12019]
Novel hierarchical architectures of Sb2WO6 are synthesized successfully by a simple hydrothermal process without any organic solvent or surfactant. The physicochemical properties of the as-prepared products are characterized in detail. Interestingly, the morphologies of Sb2WO6 could be selectively controlled by adjusting pH values of the reactive solutions. The tuft-like, cockscomb-like, and flower-like hierarchical architectures are obtained at pH = 1, 3, and 5, respectively. Based on the time-dependent experimental results, a possible growth mechanism is proposed, which reasonably follows a synergy interaction of reaction-crystallization and dissolution-recrystallization processes. The photocatalytic activities of the novel hierarchical Sb2WO6 are evaluated by the decomposition of azo compounds for the first time. Results show that the as-prepared samples exhibit the excellent photocatalytic activity and universality for the reduction of azo compounds. The conversion of methyl orange reaches 98 % after 140 min of light irradiation. HPLC-MS indicates that the selectivity of 4-aminobenzene sulfonic acid is over 99 %.
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