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银在锌/钙铁氧体纳米颗粒上的光沉积：对高效废水修复和催化剂再利用的贡献

Photodeposition of Silver on Zinc/Calcium Ferrite Nanoparticles: A Contribution to Efficient Effluent Remediation and Catalyst Reutilization.

作者信息

Fernandes Ricardo J C, Magalhães Carlos A B, Rodrigues Ana Rita O, Almeida Bernardo G, Pires Ana, Pereira André Miguel, Araujo João Pedro, Castanheira Elisabete M S, Coutinho Paulo J G

机构信息

Physics Center of Minho and Porto Universities (CF-UM-UP), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.

IFIMUP-Instituto de Física dos Materiais, Universidade do Porto, R. Campo Alegre, 4169-007 Porto, Portugal.

出版信息

Nanomaterials (Basel). 2021 Mar 24;11(4):831. doi: 10.3390/nano11040831.

DOI:10.3390/nano11040831
PMID:33805004
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8063958/
Abstract

The efficient photodegradation of textile dyes is still a challenge, especially considering resistant azo dyes. In this work, zinc/calcium mixed ferrite nanoparticles prepared by the sol-gel method were coupled with silver by a photodeposition method to enhance the photocatalytic potency. The obtained zinc/calcium ferrites are mainly cubic-shaped nanoparticles sized 15 ± 2 nm determined from TEM and XRD and an optical bandgap of 1.6 eV. Magnetic measurements indicate a superparamagnetic behavior with saturation magnetizations of 44.22 emu/g and 27.97 emu/g, respectively, for Zn/Ca ferrite and Zn/Ca ferrite with photodeposited silver. The zinc/calcium ferrite nanoparticles with photodeposited silver showed efficient photodegradation of the textile azo dyes C.I. Reactive Blue 250 and C.I. Reactive Yellow 145. Subsequent cycles of the use of the photocatalyst indicate the possibility of magnetic recovery and reutilization without a significant loss of efficiency.

摘要

纺织染料的高效光降解仍然是一项挑战，尤其是考虑到具有抗性的偶氮染料。在这项工作中，通过溶胶-凝胶法制备的锌/钙混合铁氧体纳米颗粒通过光沉积法与银耦合，以提高光催化效能。所获得的锌/钙铁氧体主要是立方体形纳米颗粒，通过透射电子显微镜（TEM）和X射线衍射（XRD）测定其尺寸为15±2纳米，光学带隙为1.6电子伏特。磁性测量表明，对于锌/钙铁氧体和光沉积银的锌/钙铁氧体，分别具有44.22电磁单位/克和27.97电磁单位/克的饱和磁化强度的超顺磁行为。光沉积银的锌/钙铁氧体纳米颗粒对纺织偶氮染料C.I.活性蓝250和C.I.活性黄145表现出高效的光降解。光催化剂的后续使用循环表明了磁性回收和再利用的可能性，且效率没有显著损失。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3635/8063958/fc2bc8791bd8/nanomaterials-11-00831-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3635/8063958/bf3e34139713/nanomaterials-11-00831-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3635/8063958/fa7e16b378e4/nanomaterials-11-00831-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3635/8063958/cdaafd2225af/nanomaterials-11-00831-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3635/8063958/91bbe8223f0d/nanomaterials-11-00831-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3635/8063958/b3250fd27f53/nanomaterials-11-00831-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3635/8063958/cdf79dbaa2f0/nanomaterials-11-00831-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3635/8063958/ec307de5b2ac/nanomaterials-11-00831-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3635/8063958/a23fb7f9f0ed/nanomaterials-11-00831-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3635/8063958/fc2bc8791bd8/nanomaterials-11-00831-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3635/8063958/bf3e34139713/nanomaterials-11-00831-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3635/8063958/fa7e16b378e4/nanomaterials-11-00831-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3635/8063958/cdaafd2225af/nanomaterials-11-00831-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3635/8063958/91bbe8223f0d/nanomaterials-11-00831-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3635/8063958/b3250fd27f53/nanomaterials-11-00831-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3635/8063958/cdf79dbaa2f0/nanomaterials-11-00831-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3635/8063958/ec307de5b2ac/nanomaterials-11-00831-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3635/8063958/a23fb7f9f0ed/nanomaterials-11-00831-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3635/8063958/fc2bc8791bd8/nanomaterials-11-00831-g009.jpg

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