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论文类型：期刊论文

发表时间：2017-03-01

发表刊物：ACS SUSTAINABLE CHEMISTRY & ENGINEERING

收录刊物：SCIE、EI

卷号：5

期号：3

页面范围：2535-2543

ISSN号：2168-0485

关键字：Selenium nanomaterials; Lysinibacillus sp.; Biogenic; Controllable synthesis; Photocatalysis

摘要：This study comprehensively investigated the feasibility of biogenic selenium nanomaterials (Se NMs) as a photocatalyst in dye degradation. The marine selenite-reducing bacterium Lysinibacillus sp. ZYM-1 was isolated. This strain can reduce selenite to Se NMs over a wide range of pH (5-9), selenite concentration (1-25 mM), and temperature (20-50 degrees C) within 48 h. Draft genome data suggested that sulfite reductase may be responsible for selenite reduction. Biogenic Se NMs generated under different conditions were subsequently characterized. The morphology and size of Se NMs were dependent on medium composition, pH, incubation time, selenite concentration, and temperature. Se nanospheres (Se NSs) exhibited significant visible light-driven photocatalytic activity on Rhodamine B (RhB) with H2O2. Three N-deethylation intermediates and phthalic acid were identified as degradation products of RhB by using liquid chromatography-high resolution mass spectrometry (LC-HRMS), indicating the coexistence of chromophore cleavage and the N-deethylation pathway.