One-step hydrothermal fabrication of visible-light-responsive AgInS2/SnIn4S8 heterojunction for highly-efficient photocatalytic treatment of organic pollutants and real pharmaceutical industry wastewater
One-step hydrothermal fabrication of visible-light-responsive AgInS2/SnIn4S8 heterojunction for highly-efficient photocatalytic treatment of organic pollutants and real pharmaceutical industry wastewater
复制标题
一步水热制备可见光响应AgInS2/SnIn4S8异质结，用于高效光催化处理有机污染物和真实制药工业废水
DOI：
10.1016/j.apcatb.2017.07.051
复制
发表时间：
2017-12-15
影响因子：
22.1
通讯作者：
Dionysiou, Dionysios D.
中科院分区：
文献类型：
--
作者：
Deng, Fang;Zhong, Fei;Dionysiou, Dionysios D.
虽然三元硫族化合物是可见光下降解有机污染物的有效光催化剂，但其光催化活性和稳定性仍然较低，离实际应用还很远。本研究采用一步水热法制备了二维AgInS 2/SnIn 4S 8纳米片异质结。AgIn 52/SnIn 4S 8纳米片异质结具有较强的可见光吸收和较窄的禁带宽度（2.27-2.35 eV），在降解2-硝基苯酚（2NP）和盐酸四环素（TC.HCl）的过程中表现出了比纯AgInS 2和纯SnIn 4S 8更好的可见光催化活性，这归因于光生电子和空穴的有效分离。进一步研究了AgInS 2/SnIn 4S 8纳米片异质结的实际应用。20 mg AgInS 2/SnIn 4S 8异质结在H2 O2存在下可有效处理100 mL真实的制药工业废水，矿化效率为65.98%，制药工业废水的化学需氧量（COD）降至153 mg/L，达到工业废水排放标准。此外，AgInS 2/SnIn 4S 8异质结在不使用再生手段的情况下连续5个催化循环后仍能保持长期活性而没有明显失活。(C)2017由Elsevier B. V.出版
Although ternary chalcogenide compounds are effective photocatalysts for degrading organic pollutants under visible-light irradiation, their photocatalytic activity and stability are still low and far from practical application. In this study, two-dimensional AgInS2/SnIn4S8 nanosheet heterojunctions were fabricated by one-step hydrothermal method. AgIn52/SnIn4S8 nanosheet heterojunctions have strong visible-light absorption and narrow band gap of 2.27-2.35 eV, and exhibit excellent visible-light photocatalytic activity in the degradation of 2-nitrophenol (2NP) and tetracycline hydrochloride (TC.HCl) compared with pure AgInS2 and pure SnIn4S8, which is attributed to the efficient separation of photogenerated electrons and holes. The practical application of AgInS2/SnIn4S8 nanosheet heterojunctions was further studied. 20 mg AgInS2/SnIn4S8 heterojunctions can effectively treat 100 mL real pharmaceutical industry wastewater in presence of H2O2 with 65.98% mineralization efficiency, and the chemical oxygen demand (COD) of pharmaceutical industry wastewater decreases to 153 mg/L, which meets the discharge standards of industrial effluent. Moreover, AgInS2/SnIn4S8 heterojunctions can maintain long-term activity without obvious inactivation after five consecutive catalytic cycles without using regeneration means. (C) 2017 Published by Elsevier B.V.