Abstract

In this study, biomorphic WO₃-Cx nanomaterial was successfully prepared with rice hull as biological templates. The structure and morphology of the nanomaterial showed that WO₃-Cx efficiently copied the original pore-shaped appearance of the rice hull with a specific surface area of 199.18 m²/g. Results of UV–Vis diffuse reflectance spectroscopy and photoluminescence spectroscopy showed that the carbon element of the rice hull biological template promoted the light response range of WO₃-Cx, inhibiting the hole–electron composite. The effects of biomorphic WO₃-Cx and commercially available WO₃ combined with sunlight on the photocatalytic degradation of methylene blue (MB) were studied. Results showed that the degradation rate of biomorphic WO₃-Cx to MB solution was higher than that of commercially available WO₃ for 44%. WO₃-Cx with a concentration of 0.05 mol/L and dose of 0.5 g/L had remarkable degradation activity to MB (10 mg/L). In addition, the quasi-first-order kinetic model could well fit the degradation process with a dynamic constant of 0.0246 min⁻¹.

中文翻译：

---

基于仿生稻壳的生物形态分级WO 3的制备及光催化性能

摘要

本研究以稻壳为生物模板成功制备了生物形态的WO ₃ -Cx纳米材料。纳米材料的结构和形态表明，WO ₃ -Cx有效地复制了比表面积为199.18 m ² / g的稻壳的原始孔状外观。UV-Vis漫反射光谱法和光致发光光谱法的结果表明，稻壳生物模板中的碳元素促进了WO ₃ -Cx的光响应范围，从而抑制了空穴-电子复合物。生物形态WO ₃ -Cx和市售WO _3的作用结合阳光对亚甲基蓝（MB）的光催化降解进行了研究。结果表明，生物形态WO ₃ -Cx降解为MB溶液的降解率比市售WO _3高44％。浓度为0.05 mol / L，剂量为0.5 g / L的WO ₃ -Cx对MB（10 mg / L）具有明显的降解活性。另外，准一阶动力学模型可以很好地拟合降解过程，其动态常数为0.0246 min ^-1。