超细铂纳米催化剂的光化学合成及其催化还原硝基苯酚的应用
Photochemical synthesis of ultrafine platinum nanocatalysts and their application in the catalytic reduction of nitrophenols
鲜亮 1田小霞 2马婧 2李伟2
作者信息
- 1. 西北民族大学化工学院,甘肃 兰州 730030;甘肃省高校环境友好复合材料及生物质利用省级重点实验室,甘肃 兰州 730030
- 2. 西北民族大学化工学院,甘肃 兰州 730030
- 折叠
摘要
以乙二醇(EG)为还原剂,通过波长为395 nm近紫外光和450、650 nm的可见光照射C60及K 2[PtCl4]混合液,制备了超细铂纳米颗粒(Pt/C60-E).利用X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)、X射线光电子能谱(XPS)以及高分辨率透射电子显微镜(HR-TEM)等表征手段对Pt/C60催化剂的组成及形貌进行了研究,结果表明,铂纳米颗粒在C60表面分散良好,平均粒径约为2.6 nm.在催化p-NP还原实验中,在近紫外光(395 nm)照射下所制备催化剂(Pt/C60-E3)表现出最高的催化活性,其速率常数k=0.12 min-1.在催化剂循环实验中,多次循环催化剂仍具有较高的活性,实验证明光化学法对前驱体铂催化剂制备起到良好的作用.
Abstract
This study focuses on synthesizing ultrafine platinum nanoparticles(Pt/C60-E)by irradiating a mixture of C60 and K2[PtCl4]with ethylene glycol(EG)as the reducing agent.The process utilizes near-ultraviolet(UV)light at a wavelength of 395 nm,along with visible light at 450 and 650 nm.The composition and morphology of the Pt/C60 catalyst were investigated using characterization techniques including X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR),X-ray photoelec-tron spectroscopy(XPS),and high-resolution transmission electron microscopy(HR-TEM).The results revealed a well-dispersed distribution of Pt nanoparticles on the C60 surface,with an average particle size of about 2.6 nm.In the catalytic reduction experiments of p-NP,the Pt/C60-E3 catalyst,prepared under near-ultraviolet irradiation(395 nm),exhibited superior catalytic activity,with a rate constant(k)of 0.12 min-1.Furthermore,in the catalyst cycling experiments,the catalysts remained highly active even after multiple cycles,demonstrating the effectiveness of the photochemical method in synthesizing precursor Pt catalysts.
关键词
超细铂纳米颗粒/富勒烯/光化学法/降解p-硝基苯酚Key words
platinum ultrafine nanoparticles/fullerene/photochemical method/degradation of p-nitrophenol引用本文复制引用
基金项目
国家自然科学基金(52167003)
Key Research and Development Projects in Gansu Province(21YF5WA064)
出版年
2024
国家科技期刊平台
NSTL
万方数据