Xue Ma, Chunquan Wang, Youtao Song

College of Environment, Liaoning University,

Jun Wang，Guowei Wang, Siyi Li

College of Chemistry, Liaoning University

Abstract

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 SO₃ ^2- 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 SO₃ ^2- are also studied. Due to the presence of NiS2 as 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 SO₃ ^2- under simulated solar-light irradiation. The conversion ratios of NO₂ ^- and SO₃ ^2- can reach 87.03 % and 97.47 % under optimal experimental conductions, respectively.

Read the full article here:   86-NiS2 as trapezoid conductive channel modified ternary Z-scheme photocatalyst system, NiGa2O4NiS2WO3, for highly photocatalytic simultaneous conversions of NO2- and SO32-.pdf