Department of Materials Science and Engineering, National Taiwan University of Science and Technology, No.43, Sec. 4, Keelung Road, Taipei, 10607, Taiwan.
Department of Materials Science and Engineering, National Taiwan University of Science and Technology, No.43, Sec. 4, Keelung Road, Taipei, 10607, Taiwan.
Chemosphere. 2020 Sep;254:126823. doi: 10.1016/j.chemosphere.2020.126823. Epub 2020 Apr 18.
Environmentally toxic organic pollutants, namely methylene blue (MB), neutral red (NR), Rhodamine B (RhB), and methyl orange (MO) dyes contain highly toxic, carcinogenic, non-biodegradable, and colored pigments which cause harm for humans and aquatic organisms even at low concentrations. To detoxify these toxic organic pollutants from the wastewater, the bimetallic solid solution-typed In-Mo(O,S) catalyst with various indium (In) contents were synthesized at low temperature through a simple precipitation method. The morphological, structural, chemical compositions, electrochemical and optical properties of the catalysts were thoroughly characterized. The photodegradation performance of the In-Mo(O,S) catalysts over the cationic, anionic and neutral dyes were studied under visible light irradiation. It has been observed that the photocatalytic activity was enhanced as In was added to the Mo(O,S) catalyst, and In-Mo(O,S)-20 was found to be the best composition to completely degrade four organic dyes. The dye degradation had rate constant values of 9.5 × 10 min, 6.3 × 10 min, 4.4 × 10 min, and 15.7 × 10 min for MB (20 ppm), NR (20 ppm), RhB (10 ppm), and MO (10 ppm) dyes, respectively. The active species for degradation of MB is different from those for RhB and MO. Single phase In-Mo(O,S)-20 capable to degrade four kinds of dyes at a fast rate is a good photocatalyst.
环境有毒有机污染物，即亚甲蓝（MB）、中性红（NR）、罗丹明 B（RhB）和甲基橙（MO）染料，含有高毒性、致癌性、不可生物降解和有色颜料，即使在低浓度下也会对人类和水生生物造成危害。为了从废水中解毒这些有毒有机污染物，通过简单的沉淀法在低温下合成了具有各种铟（In）含量的双金属固溶体型 In-Mo（O，S）催化剂。对催化剂的形态、结构、化学成分、电化学和光学性质进行了彻底的表征。研究了在可见光照射下，In-Mo（O，S）催化剂对阳离子、阴离子和中性染料的光降解性能。结果表明，随着 In 的加入，Mo（O，S）催化剂的光催化活性得到增强，In-Mo（O，S）-20 是完全降解四种有机染料的最佳组成。四种染料的降解速率常数分别为 9.5×10 min、6.3×10 min、4.4×10 min 和 15.7×10 min，对于 MB（20 ppm）、NR（20 ppm）、RhB（10 ppm）和 MO（10 ppm）染料。MB 降解的活性物质与 RhB 和 MO 的不同。单相 In-Mo（O，S）-20 能够快速降解四种染料，是一种良好的光催化剂。
