NiS2 as trapezoid conductive channel modified ternary Z-scheme photocatalyst system, NiGa2O4/NiS2/WO3, for highly photocatalytic simultaneous conversions of NO2− and SO32−
NiS2 as trapezoid conductive channel modified ternary Z-scheme photocatalyst system, NiGa2O4/NiS2/WO3, for highly photocatalytic simultaneous conversions of NO2− and SO32−
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DOI：
10.1016/j.cej.2018.05.149
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发表时间：
2018-10
影响因子：
15.1
通讯作者：
Xue Ma;Guowei Wang;Chunquan Wang;Siyi Li;Jun Wang;Youtao Song
中科院分区：
文献类型：
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作者：
Xue Ma;Guowei Wang;Chunquan Wang;Siyi Li;Jun Wang;Youtao Song
本文采用溶胶-水热和煅烧法制备了一种新型的三元Z-scheme光催化剂NiGa2O4/NiS2/WO3。通过模拟太阳光照射下NO2−和SO32−的同时转化，评价了所制备光催化剂的光催化性能。同时，研究了溶液酸度、模拟太阳光照时间、e -和h+清除剂、使用次数和光催化剂种类对NO2−和SO32−光催化转化的影响。由于NiS2as导电通路的存在，能够快速转移光生电子（e−）并有效促进电子（e−）与空子（h+）的分离，所制备的三元Z-scheme光催化剂NiGa2O4/NiS2/WO3在模拟太阳光照下同时转化NO2−和SO32−表现出优异的性能。在最佳实验电导下，NO2−和SO32−的转化率分别可达87.03%和97.47%。
In this work, a novel ternary Z-scheme photocatalyst, NiGa2O4/NiS2/WO3, is prepared by sol-hydrotherma and calcination methods. The photocatalytic performance of prepared photocatalyst is evaluated through the simultaneous conversions of NO2−and SO32−under simulated solar-light irradiation. At the same time, the effects of solution acidity, simulated solar-light irradiation time, e−and h+scavengers, used times and photocatalyst species on photocatalytic conversions of NO2−and SO32−are also studied. Due to the presence of NiS2as conducting pathway, which can quickly transfer photo-generated electron (e−) and efficiently promote separation of electrons (e−) and holse (h+), the prepared ternary Z-scheme photocatalyst, NiGa2O4/NiS2/WO3, exhibits excellent performance in the simultaneous conversions of NO2−and SO32−under simulated solar-light irradiation. The conversion ratios of NO2−and SO32−can reach 87.03% and 97.47% under optimal experimental conductions, respectively.