School of Forestry, Henan Agricultural University, Zhengzhou 450002, China; Department of Geology Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia; School of Environmental Studies, China University of Geosciences, 430074 Wuhan, China.
School of Forestry, Henan Agricultural University, Zhengzhou 450002, China.
J Photochem Photobiol B. 2019 Sep;198:111579. doi: 10.1016/j.jphotobiol.2019.111579. Epub 2019 Jul 25.
The sol-gel/ultrasonically rout produced the novel MnS2-SiO2 nano-hetero-photocatalysts with the various ratio of MnS. Prepared nano-catalyst were investigated in the photo-degradation of methylene blue under UV light illumination. Structural and optical attributes of as-prepared nano-catalysts were evaluated by X-ray diffraction and photoelectron spectroscopy. The morphological were studied by scanning electron microscopy-EDS, and dynamic light scattering. The diffuse reflectance spectroscopy was applied to examine the band gap energy. The E values of SiO, MnS-SiO-0, MnS-SiO-1, and MnS-SiO-2 nanocomposites are 6.51, 3.85, 3.17, and 2.67 eV, respectively. The particle size of the SiO and MnS-SiO-1 nanocomposites were 100.0, and 65.0 nm, respectively. The crystallite size values of MnS-SiO-1 were 52.21 nm, and 2.9 eV, respectively. MnS-SiO nano-photocatalyst was recognized as the optimum sample by degrading 96.1% of methylene blue from water. Moreover, the influence of pH of the solution, and contact time as decisive factors on the photo-degradation activity were investigated in this project. The optimum data for pH and time were found 9 and 60 min, respectively. The photo-degradation capacity of MnS-SiO-2 is improved (96.1%) due to the low band gap was found from UV-vis DRS. The antimicrobial data of MnS-SiO were studied and demonstrated that the MnS-SiO has fungicidal and bactericidal attributes.
溶胶-凝胶/超声法制备了具有不同 MnS 比的新型 MnS2-SiO2 纳米异质光催化剂。在紫外光照射下，研究了所制备的纳米催化剂对亚甲基蓝的光降解性能。采用 X 射线衍射和光电子能谱对所制备的纳米催化剂的结构和光学性质进行了评价。采用扫描电子显微镜-能谱仪（EDS）和动态光散射研究了形貌。采用漫反射光谱法测定了带隙能。SiO、MnS-SiO-0、MnS-SiO-1 和 MnS-SiO-2 纳米复合材料的 E 值分别为 6.51、3.85、3.17 和 2.67 eV。SiO 和 MnS-SiO-1 纳米复合材料的粒径分别为 100.0 和 65.0 nm。MnS-SiO-1 的晶粒尺寸值分别为 52.21nm 和 2.9eV。MnS-SiO 纳米光催化剂被认为是最佳样品，可将水中的亚甲基蓝降解 96.1%。此外，本项目还研究了溶液 pH 值和接触时间等决定性因素对光降解活性的影响。发现最佳的 pH 值和时间分别为 9 和 60 分钟。MnS-SiO-2 的光降解能力得到了提高（96.1%），因为从紫外-可见 DRS 中发现了较低的带隙。还研究了 MnS-SiO 的抗菌数据，并证明了 MnS-SiO 具有杀菌和抑菌属性。
