The Bi2O4/Bi2WO6 composites were synthesized by one step hydrothermal method, which were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transformed infrared spectroscopy (FT-IR), photoluminescence spectra (PL), X-ray photoelectron spectroscopy (XPS) and UV - Vis diffuse reflectance spectroscopy (DRS). The photocatalytic performance of the composite was tested by degrading methyl orange (MO) under visible light irradiation. The results showed that the Bi2O4/Bi2WO6 composites performed better than pure Bi2O4 and Bi2WO6, whose cycle stability was also greatly improved. Among them, S3 sample (Bi2O4:Bi2WO6 = 16:1) could degrade by about 95% methyl orange (MO) within 50 min, and after three cycles the degradation rate could still reach 74%. The enhanced photocatalytic activity and stability was attributed to the formation of heterojunctions. This work provided a promising composite photocatalyst with high performance for organic pollutant degradation.

以本校开发的机械类基础课程 VR 资源库为对象,介绍了 VR 技术的引入在高职课程教学中的重要性,同时以本校所开发VR资源库为载体,具体阐述了机械类专业基础课中的机械制图、机械设计基础和机械制造基础课程在高职院校学生教学上的应用与实践,说明了本校 VR 资源在教学授课中的优势,为未来VR技术在教育行业的应用抛砖引玉.

ABSTRACT The Bi2O4/Bi2WO6 composites were synthesized by one step hydrothermal method, which were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transformed infrared spectroscopy (FT-IR), photoluminescence spectra (PL), X-ray photoelectron spectroscopy (XPS) and UV – Vis diffuse reflectance spectroscopy (DRS). The photocatalytic performance of the composite was tested by degrading methyl orange (MO) under visible light irradiation. The results showed that the Bi2O4/Bi2WO6 composites performed better than pure Bi2O4 and Bi2WO6, whose cycle stability was also greatly improved. Among them, S3 sample (Bi2O4:Bi2WO6 = 16:1) could degrade by about 95% methyl orange (MO) within 50 min, and after three cycles the degradation rate could still reach 74%. The enhanced photocatalytic activity and stability was attributed to the formation of heterojunctions. This work provided a promising composite photocatalyst with high performance for organic pollutant degradation. GRAPHICAL ABSTRACT

就目前我国教育政策发展状况而言,高职院校要想得到积极的发展就要做出合适的教学改革政策,聚焦时代,这在高职院校中是迫在眉睫的问题.根据高职院校机电一体化教学的过程,本文会从高职院校机电一体化专业的教学改革出发,就当前的高职院校以及机电一体化教学改革的现状进行分析.提出高职院校体系构建的合理之处,并就机电一体化教学用生产线开发与设计进行探索,提出理论与实践相结合的教学模式,依托模拟自动生产线,从学生的兴趣入手,循序渐进,有利于提高课堂教学的质量,提高学生的学习效率让学生全面掌握机电一体化的相关技术的同时也可以进一步促进我国高职院校机电一体化的改革和发展.

A series of hierarchical BiOBr architectures were successfully prepared via a simple solvothermal method. The as-prepared samples were characterised by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), N2-sorption and UV-Vis diffuse reflectance spectroscopy. The results showed that the morphologies of BiOBr architectures could be controlled by adjusting the addition amount of acetic acid (HAc) without changing their crystallinities, whose reason was discussed. The photocatalytic activities of the prepared BiOBr architectures were evaluated by degradation of methyl orange (MO) under visible light irradiation. It was found that the as-prepared BiOBr architectures exhibited morphology-dependent photocatalytic activities, among which the photodegradation efficiency of the sample prepared with 5 mL of HAc was as high as 94.3% within 100 min visible light irradiation. The enhanced photocatalytic activity was attributed to strong visible light adsorption, high BET surface area and high separation efficiency of the photogenerated electron-hole pairs.