林产化学与工业2024，Vol.44Issue(2)：33-41,9.DOI:10.3969/j.issn.0253-2417.2024.02.005
可见光响应S空位ZnIn2S4催化剂的制备及选择性氧化HMF研究
Preparation of Visible Light Response ZnIn2S4 Catalyst with S Vacancy and Its Selective Oxidation of HMF
摘要
Abstract
A visible light response catalyst with abundant S vacancies,zinc indium sulfide(VS-ZIS),was prepared in situ by one-step method using thioacetamide as the sulfur source.The process of selective photocatalytic oxidation of 5-hydroxymethylfurfural(HMF)to 2,5-diformylfuran(DFF)over VS-ZIS was studied,and the mechanism of VS-ZIS photocatalytic selective oxidation of HMF to DFF was analyzed.The existence of S vacancies was confirmed by electron paramagnetic resonance(EPR).The optical properties and elemental composition of VS-ZIS were investigated by UV-vis diffuse reflectance spectroscopy(DRS)and XPS,and the surface morphology and crystal structure of the catalyst were observed using SEM and XRD.The results showed that ZnIn2S4 could be successfully synthesized by the one-step method.The catalyst exhibited a petal-like microsphere morphology,and the elements of Zn,In,and S were uniformly distributed.The visible light absorption range of the catalyst was 420-530 nm.The synthesis time did not has significantly effect on the crystal structure of ZnIn2S4,while the S vacancies in the catalyst could be controlled by adjusting the synthesis time.Among the samples of VS-ZIS-2 to VS-ZIS-10 prepared at 2-10 h,the sample VS-ZIS-6 obtainedat 6 h had abundant S vacancies.The VS-ZIS-6 prepared by heating at 80℃for 6 h showed the best performance for the selectiveoxidationof HMFunder theconditionsof areactiontimeof4 h,VS-ZIS-6/HMFmassratioof3.2,HMF concentration of 1.0 mmol/L,and air flow rate of 20 mL/min.The HMF conversion rate reached 95.4%,and the DFF yield was61.8%.The abundant S vacancies on the surface of VS-ZIS could promote the adsorption and activation of O2 on the catalyst surface,capturing photoinduced electrons to generate more O-2·,thereby enhancing the selective oxidation ability of the catalyst towards HMF.关键词
硫空位/硫化铟锌/5-羟甲基糠醛/光催化/选择性氧化/2,5-呋喃二甲醛Key words
sulfur vacancy/ZnIn2S4/HMF/photocatalytic/selective oxidation/DFF分类
化学化工引用本文复制引用
徐俪菲,侯浩强,马春慧,李伟,罗沙,刘守新..可见光响应S空位ZnIn2S4催化剂的制备及选择性氧化HMF研究[J].林产化学与工业,2024,44(2):33-41,9.基金项目
国家自然科学基金资助项目(31890773) （31890773）
中央高校基本科研业务费专项资金(2572021BB12) （2572021BB12）
