硫化铟锌/纸浆纤维复合纸的制备与光催化除甲醛性能研究

Preparation of Indium Zinc Sulfide/Pulp Fiber Composite Paper and Its Photocatalytic Performance for Formaldehyde Removal

关键词:  光催化纸  硫化铟锌  原位负载  甲醛去除

Key Words:photocatalytic paper  indium zinc sulfide  in-situ loading  formaldehyde removal

摘要:本研究以硝酸铟为铟源，硫代乙酰胺为硫源，硝酸锌为锌源，将硫化铟锌（ZnIn₂S₄）原位负载于纸浆纤维（PFs）上，制得ZnIn₂S₄/PFs复合纸，对其光催化除甲醛特性进行了分析。X射线光电子能谱仪（XPS）、X射线衍射仪（XRD）、扫描电子显微镜（SEM）分析表明ZnIn₂S₄被成功负载于PFs上，紫外-可见漫反射光谱（UV-Vis DRS）分析表明ZnIn₂S₄/PFs复合纸具有光催化活性。研究发现，随着硝酸铟用量的增加，ZnIn₂S₄/PFs复合纸的甲醛去除率先增加后降低。当硝酸铟用量4 mmol时，所制ZnIn₂S₄/PFs复合纸的甲醛去除率最高（73.14%）。将ZnIn₂S₄/PFs复合纸放置于自然环境中30天，其抗张指数仅下降了5.1%，说明ZnIn₂S₄/PFs复合纸具有很好的环境稳定性。ZnIn₂S₄/PFs复合纸经3次光催化循环后，甲醛去除率下降了26.94%，表明具有较好的循环使用性能。

Abstract:In this study， indium nitrate was used as the source of indium， thioacetamide as the source of sulfur， zinc nitrate as the source of zinc， nano indium zinc sulfide （ZnIn₂S₄） was loaded on pulp fibers （PFs） in situ to prepare ZnIn₂S₄/PFs composite paper， and its photocatalytic performance for formaldehyde removal was explored. The successful loading of nano ZnIn₂S₄ on PFs was confirmed by X-ray photoelectron spectroscopy （XPS）， X-ray diffractometer （XRD）， and scanning electron microscope （SEM）. UV-Vis DRS analysis showed that the ZnIn₂S₄/PFs composite paper had photocatalytic activity. It was found that the formaldehyde removal rate of ZnIn₂S₄/PFs composite paper first increased and then decreased with the increase of indium nitrate dosage. The formaldehyde removal rate of the prepared ZnIn₂S₄/PFs composite paper reached the highest （73.14%） when indium nitrate dosage was 4 mmol. The tensile index of ZnIn₂S_4/PFs composite paper only decreased by 5.1% when it was placed in the natural environment for 30 days， illustrating the ZnIn₂S₄/PFs composite paper was of very good environmental stability. The formaldehyde removal rate of ZnIn₂S₄/PFs composite paper decreased by 26.94% after three photocatalytic cycles， it showed that it had good recycling performance.