Synthesis of (Sn,Zn)(O,S) bimetallic oxysulfide catalyst for the detoxification of Cr+6 in aqueous solution

• Published in: Advanced powder technology : the international journal of the Society of Powder Technology, Japan Vol. 30; no. 12; pp. 3099 - 3106
• Main Authors: Zelekew, Osman Ahmed, Kuo, Dong-Hau, Abdullah, Hairus
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.12.2019
• Subjects: Bimetallic; Chromium; Detoxification; Photocatalysis; Reduction; Chromium; Reduction; Photocatalysis; Detoxification; Bimetallic
• ISSN: 0921-8831; 1568-5527
• DOI: 10.1016/j.apt.2019.09.016

The reduction reaction mechanism for Cr(VI) under visible light by Sn-20 catalyst. [Display omitted] •The new designed (Sn,Zn)(O,S) bimetallic oxysulfide catalyst was synthesized.•The synthesis was a single-step, easy, and done at low temperature below 100 °C.•The effect of the amount of Zn to (Sn, Zn) (O, S) were studied systematically.•The (Sn,Zn)(O,S) oxiysulfide had excellent performance for reduction of Cr+6. Herein, we report the bimetallic (Sn,Zn)(O,S) oxysulfide nanocatalyst with a facile method. The Sn-based catalyst with the addition of Zn was synthesized with the proportions of 0, 20, 30 and 50% of Zn to Sn precursors for preparation. The catalysts were characterized by XRD, TEM, SEM XPS, and UV–vis instruments. The nanocatalysts were also tested for the detoxification of Cr+6. The Sn-20 catalyst with 20 M percent of Zn(Ac)2·2H2O showed an excellent performance for the induced photocatalytic reduction of Cr+6 under visible light irradiation at room temperature. The complete reduction of Cr+6 was achieved within 80 min by Sn-20 catalyst. However, 85.6, 97, and 94% of Cr+6 reductions were achieved within 80 min under visible light illumination by Sn-0, Sn-30, and Sn-50 catalysts, respectively. Hence, the bimetallic (Sn,Zn)(O,S) oxysulfide nanocatalyst will be a candidate and highly potential material for the detoxification of Cr(VI)-containing polluted water.