Hardy Shuwanto, Jenni Lie, Hairus Abdullah, Subur P. Pasaribu, Indra Masmur
In this study, ZnIn2S4 with oxygen vacancies was fabricated using NaBH4-assisted hydrothermal method to enhance the photocatalytic activities. The generated ZIS and ZISVo-x samples exhibited microspherical nanosheet structure and it is proven that NaBH4 could enhance the amount of oxygen vacancies in ZnIn2S4 as confirmed by XPS analysis. Upon solar light irradiation, ZISVo-5 sample performed a fast photodegradation of tetracycline (TC) within 10 min and simultaneously exhibited a hydrogen evolution amount of ∼ 12 mmol (AQE = 6.07 at 420 nm), which is 2.75 times higher than that of pristine ZnIn2S4 (4.4 mmol). The degraded products of TC were further identified using LC-MS. The excellent photocatalytic HER performance was attributed to the optimum amount of oxygen vacancies in ZISVo-5 sample and the reactive oxygen species of •OH, O2•-, and 1O2 as confirmed by ESR analysis under light irradiation played a vital role for the rapid degradation of TC by ZISVo-5. © 2024 Elsevier Ltd
Department of Industrial Engineering, Universitas Prima Indonesia, Medan, 20118, Indonesia; Department of Chemical Engineering, Widya Mandala Catholic University, Surabaya, 60114, Indonesia; Department of Chemistry, Faculty of Mathematics and Natural Sciences, Mulawarman University, Samarinda, 75123, Indonesia; Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Sumatera Utara, Medan, 20155, Indonesia; Department of Materials Science and Engineering, National Taiwan University of Science and Technology, No. 43, Sec. 4, Keelung Road, Taipei, 10607, Taiwan