A facile one-step hydrothermal preparation of Mn(VO 3 ) 2 under different pH conditions and their photocatalytic perform
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A facile one‑step hydrothermal preparation of Mn(VO3)2 under different pH conditions and their photocatalytic performance Jinqiu Huang1 · Ruijie Liang1 · Yuan Huang1 · Feng Li1,2 · Taohai Li1,2 Received: 29 January 2020 / Accepted: 7 September 2020 © Iranian Chemical Society 2020
Abstract Adopting MnSO4·H2O and K6V10O28·9H2O as the manganese and vanadium source, respectively, the Mn(VO3)2 product was obtained by the facile one-step hydrothermal method under different pH conditions without adding any additives. The effects of pH on microstructure and photoactivity were investigated. The photocatalytic results demonstrate that Mn(VO3)2 prepared at pH = 5.0 showed optimal photoactivity in the photodegradation of RhB under UV light irradiation, and 95% of RhB was degraded by irradiation within 80 min, offering a new insight with the functional materials in the application of the photochemistry field. Keywords Mn(VO3)2 · Microstructure · Hydrothermal · XPS · Photocatalytic
Introduction The increasing pollution of water by industrial wastes demands effective solution methods of modern decontamination technology urgently, where photocatalytic degradation of harmful organic matters with semiconductor catalysts has been considered as a novel and efficient route [1]. Among various synthetic semiconductors, the group of metal vanadate has shown multifunctional potentials as photocatalysts in water purification [2–5]. However, the species of metal metavanadates are mainly limited to the AgVO3, Cu(VO3)2 and their composites [6–10]. The Mn(VO3)2 (manganese metavanadate) receives much less attentions than its possible applications, though it has been referred to a promising electrode material in the Li-ion battery [11, 12]. It has been generally noticed the performances of catalytic activities Electronic supplementary material The online version of this article (https://doi.org/10.1007/s13738-020-02060-4) contains supplementary material, which is available to authorized users. * Taohai Li [email protected] 1
Key Laboratory of Environment‑Friendly Chemistry and Applications Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
Nano and Molecular Systems Research Unit, Faculty of Science, University of Oulu, P. O. Box 3000, 90014 Oulu, Finland
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heavily depend on the morphologies of catalysts, which are subjected to the preparation conditions. Hence, the synthesis of Mn(VO3)2 with the controlled crystal form and morphology is highly desirable. Up to now, only a few preparation of Mn(VO3)2 has been reported. For example, Mn(VO3)2·yH2O compounds were synthesized with a precipitation method [13, 14] or refluxing route with the mixture of V2O5 with Mn(CH3COO)2 in water medium [15]. The powder form of Mn(VO3)2 can also be reached via route-rheological phase reaction method or polymer gelation method [16, 17]. However, the preparation conditions are complicated, and the purity of the synthetic product is hardly controlled precisely. Hydrothermal method has also b
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