Azzam Ahmed B, El-Sheikh S M, Geioushy R A, Salah Bahaa Ahmed, El-Dars Farida M, Helal Ahmed S
Chemistry Department, Faculty of Science, Helwan University Helwan Egypt.
Nanomaterials and Nanotechnology Department, Advanced Materials Division, Central Metallurgical R & D Institute (CMRDI) P. O. Box 87, Helwan 11421 Cairo Egypt
RSC Adv. 2019 Jun 3;9(30):17246-17253. doi: 10.1039/c9ra02315a. eCollection 2019 May 29.
A novel BiPO photocatalyst has been fabricated a facile precipitation route using dimethyl sulfoxide (DMSO) as a solvent. The physical and chemical properties of the BiPO photocatalyst material were analyzed using XRD, Rietveld refinements XRD, FE-SEM, TEM, HR-TEM, EDS, XPS, FT-IR, Raman spectra, UV-Vis (DRS), and PL. The results confirm that hexagonal phase BiPO (HBIP) nanorods were successfully synthesized. FE-SEM images reveal that the addition of surfactant "CTAB" during preparation can control the surface morphology of BiPO. The Rietveld refinement technique revealed the formation of a monazite monoclinic (nMBIP) and monoclinic (mMBIP) phase junction resulting from the calcination of HBIP at 500 °C. The photocatalytic behavior of the as-synthesized hexagonal and monoclinic BiPO nanostructures towards aniline blue (AB) degradation under UV light was systematically investigated. Among all catalysts, the phase junction (nMBIP-mMBIP) structure demonstrated the highest photocatalytic activity. The degradation rate of AB over the (nMBIP-mMBIP) phase junction structure was 3.4 times higher than that by HBIP. These results suggested that the surface-phase junction provides a synergistic effect for the electron-hole transfer process.
通过一种简便的沉淀路线，以二甲基亚砜（DMSO）作为溶剂制备了一种新型BiPO光催化剂。利用X射线衍射（XRD）、Rietveld精修XRD、场发射扫描电子显微镜（FE-SEM）、透射电子显微镜（TEM）、高分辨率透射电子显微镜（HR-TEM）、能谱仪（EDS）、X射线光电子能谱（XPS）、傅里叶变换红外光谱（FT-IR）、拉曼光谱、紫外可见漫反射光谱（UV-Vis，DRS）和光致发光光谱（PL）对BiPO光催化剂材料的物理和化学性质进行了分析。结果证实成功合成了六方相BiPO（HBIP）纳米棒。FE-SEM图像显示，制备过程中添加表面活性剂“十六烷基三甲基溴化铵（CTAB）”可以控制BiPO的表面形貌。Rietveld精修技术揭示了在500℃下煅烧HBIP导致形成独居石单斜（nMBIP）和单斜（mMBIP）相结。系统研究了合成的六方相和单斜相BiPO纳米结构在紫外光下对苯胺蓝（AB）降解的光催化行为。在所有催化剂中，相结（nMBIP-mMBIP）结构表现出最高的光催化活性。AB在（nMBIP-mMBIP）相结结构上的降解速率比HBIP高3.4倍。这些结果表明表面相结为电子-空穴转移过程提供了协同效应。
