氨基功能化SiO2负载磷钼酸催化氧化碘离子性能研究

Study on the catalytic oxidation of iodine ions by functionalized SiO2 supported phosphomolybdic acid

卢林 ¹郭军 ²张丹 ³邱双艳 ¹张以菊¹

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作者信息

1. 贵州师范大学化学与材料科学学院,贵阳 550001
2. 贵州师范大学化学与材料科学学院,贵阳 550001;瓮福(集团)有限责任公司中低品位磷矿及其共伴生资源高效利用国家重点实验室,贵阳 550014
3. 瓮福(集团)有限责任公司中低品位磷矿及其共伴生资源高效利用国家重点实验室,贵阳 550014
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摘要

将Cu取代的磷钼酸(PMo12)通过静电作用锚定在氨基功能化的SiO2(NH2-SiO2)表面,制备出非均相催化剂PMo11Cu/NH2-SiO2.运用PXRD(X射线粉末衍射)、FT-IR(傅里叶变换红外光谱)、UV-VisDRS(紫外-可见漫反射光谱)、SEM(扫描电子显微镜)、EDX(X射线能谱仪)和XPS(X射线光电子能谱)等对该催化剂的结构和组成进行表征;探索了其催化过氧化氢(H2O2)氧化碘离子(I-)性能,结果表明,在T=25 ℃,c(I-)=2.5× 10-3 mol/L,c(H2O2)=2.0×10-3 mol/L,pH=2.4,PMo11 Cu/NH2-SiO2 催化碘离子反应速率 v=8.87 × 10-6 mol/L·s,比空白实验提高了 616倍,且在前10次循环中都能保持优异的催化活性和稳定性.

Abstract

The transition metal Cu substituted polyoxometalates cluster(PMo11Cu)was immobilized by electro-static force on NH2 functionalized SiO2 with the post-modified method,the resulting composite materials,ab-breviated as PMo11Cu/NH2-SiO2.The structure and composition of catalyst was characterized by XRD,FT-IR,UV-Vis-DRS,SEM,EDX XPS,etc.A study was conducted to investigate the catalytic performances of PMo11 Cu/NH2-SiO2 towards the oxidation of iodine ion.The results showed that at T=25 ℃,c(I-)=2.5 × 10-3 mol/L,c(H2 O2)=2.0 × 10-3 mol/L,pH=2.4,the rate of iodide ion reaction catalyzed by PMo11 Cu/NH2-SiO2 with v=8.87 × 10-6 mol/(L·s),was increased by a factor of 616 over that of the blank experiment and the catalytic activity and stability were maintained in the first 10 cycles were able to maintain excellent catalytic activity and stability.

关键词

过渡金属取代磷钼酸/改性SiO2/非均相催化/碘离子

Key words

transition metal replaces phosphomolybdic acid/modified SiO2/heterogeneous catalysis/iodine ion

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基金项目

国家自然科学基金项目(21862005)

出版年

2024

功能材料

重庆材料研究院中国仪器仪表学会仪表材料学会

功能材料

CSTPCDCSCD北大核心

影响因子：0.918

ISSN：1001-9731

参考文献量35

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