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首页> 外文会议>Energy Technologies Symposium >A Novel Preparation of Bi_2O_3 and Their Potent Photocatalytic Activity Under Visible-Light Irradiation
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A Novel Preparation of Bi_2O_3 and Their Potent Photocatalytic Activity Under Visible-Light Irradiation

机译：在可见光照射下的Bi_2O_3的新制剂及其有效的光催化活性

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Three phases of Bi_2O_3 were first synthesized by extraction-stripping-precipitation and post decomposition from BiCl_3 leaching solution. The as-prepared Bi_2O_3 were characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectra (FT-IR), scanning and transmission electron microscopy (SEM, TEM), UV-vis diffuse reflectance spectroscopy (UV-vis DRS), Brunauer-Emmett-Teller (BET) and X-ray photoelectron spectroscopy (XPS). The photocatalytic performances of the oxides were investigated by decomposing rhodamine B (RB) under visible irradiation. It shows that the Bi_2O_3 with different crystal structures and morphology were obtained under different decomposition temperature. The band gaps of as-prepared samples were 2.36, 2.41, and 2.78 eV for β-Bi_2O_3, α-Bi_2O_3, and δ-Bi_2O_3, respectively, and the photocatalytic activities followed the order: β-Bi_2O_3 > α-Bi_2O_3 > δ-Bi_2O_3, which was in good accordance with the photoluminescence spectra measurement results. The β-Bi_2O_3 exhibited the best photocatalytic performance which can effectively degrade 99.23% RB within 240 min.
机译：首先通过提取剥离沉淀和来自BICL_3浸出溶液的分解后合成BI_2O_3的三相。由X射线粉末衍射（XRD），傅里叶变换红外光谱（FT-IR），扫描和透射电子显微镜（SEM，TEM），UV-VI扩散反射光谱（UV-VIS）（UV-VIS）（UV-VIS DRS）的X射线粉末衍射（XRD）表征为如制备的BI_2O_3 ，Brunauer-Emmett-Teller（Bet）和X射线光电子能谱（XPS）。通过在可见光照射下分解罗丹明B（RB）来研究氧化物的光催化性能。它表明，在不同的分解温度下获得具有不同晶体结构和形态的BI_2O_3。对于β-Bi_2O_3，α-Bi_2O_3和Δ-Bi_2O_3分别为2.36,2.41和2.78eV，并且光催化活动遵循顺序：β-Bi_2O_3>α-Bi_2O_3>Δ- Bi_2O_3，与光致发光光谱测量结果良好。 β-Bi_2O_3表现出最好的光催化性能，可以在240分钟内有效地降解99.23％的RB。

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