Das Sangita, Paul Sayantani, Sen Bibaswan, Rudra Pratyasha, Mondal Swastik, Ali Sk Imran
Department of Chemistry, University of Kalyani, Nadia, Kalyani 741235, West Bengal, India.
CSIR-Central Glass and Ceramic Research Institute, Jadavpur, Kolkata 700032, West Bengal, India.
Inorg Chem. 2024 Feb 5;63(5):2709-2724. doi: 10.1021/acs.inorgchem.3c04068. Epub 2024 Jan 22.
A potential adsorbent, SbOCl@NbSe composite, was generated from the SbOCl photocatalyst and 5 wt % layered 2H-NbSe nanoparticles for the highly effective removal of Cr(VI) and Fe(III) ions and methyl orange (MO) from aqueous solution, and a comparison was drawn against the precursors. SbOCl crystallites and NbSe nanoparticles were synthesized hydrothermally, and the composite was prepared by the incipient wetness impregnation technique. The crystal structure of SbOCl was determined by single-crystal X-ray diffraction (SCXRD) data. Powder X-ray diffraction (PXRD) study revealed the 2H phase of NbSe nanoparticles. Field emission scanning electron microscopy (FESEM) analysis confirmed the formation of the spherical-shaped NbSe nanoparticles from rod-shaped bulk 2H-NbSe. Morphological changes from the hexagonal to irregular prismatic shape were found upon the formation of the SbOCl@NbSe composite compared to pure SbOCl. Negative ζ-potential values indicated that electrostatic interactions were the predominant factor for the adsorption process. SbOCl@NbSe provided removal efficiencies of 99% for MO in 6 h, 96.52% for Cr(VI) within 2.5 h, and 92.43% for Fe(III) within 4 h of 10 mg/L initial concentration. The maximum adsorption capacities of the composite for MO, Fe(III), and Cr(VI) were found to be 66.56, 131.48, and 122.30 mg/g, respectively, as calculated using the Langmuir isotherm equation.
一种潜在的吸附剂SbOCl@NbSe复合材料，由SbOCl光催化剂和5 wt%的层状2H-NbSe纳米颗粒制备而成，用于从水溶液中高效去除Cr(VI)、Fe(III)离子和甲基橙(MO)，并与前驱体进行了比较。通过水热法合成了SbOCl微晶和NbSe纳米颗粒，并采用初湿浸渍技术制备了复合材料。利用单晶X射线衍射(SCXRD)数据确定了SbOCl的晶体结构。粉末X射线衍射(PXRD)研究揭示了NbSe纳米颗粒的2H相。场发射扫描电子显微镜(FESEM)分析证实了由棒状块状2H-NbSe形成了球形的NbSe纳米颗粒。与纯SbOCl相比，SbOCl@NbSe复合材料形成后，形态从六边形变为不规则棱柱形。负的ζ电位值表明静电相互作用是吸附过程的主要因素。对于初始浓度为10 mg/L的溶液，SbOCl@NbSe在6 h内对MO的去除效率为99%，在2.5 h内对Cr(VI)的去除效率为96.52%，在4 h内对Fe(III)的去除效率为92.43%。使用朗缪尔等温方程计算得出，该复合材料对MO、Fe(III)和Cr(VI)的最大吸附容量分别为66.56、131.48和122.30 mg/g。
