Eco-Friendly Synthesis of SnO2-Cu Nanocomposites and Evaluation of Their Peroxidase Mimetic Activity

被引:14
|
作者
Tripathi, Ravi Mani [1 ,2 ]
Chung, Sang J. [1 ]
机构
[1] Sungkyunkwan Univ, Sch Pharm, 2066 Seoburo, Suwon 16419, Gyeonggido, South Korea
[2] Amity Univ Uttar Pradesh, Amity Inst Nanotechnol, Sect 125, Noida 201303, India
基金
新加坡国家研究基金会;
关键词
green synthesis; SnO2-Cu nanocomposites; nanozyme; peroxidase mimetic activity; colorimetric detection; 3,3 ',5,5 '-tetramethylbenzidine; COLORIMETRIC DETECTION; CATALYTIC-ACTIVITY; THUJA-ORIENTALIS; URIC-ACID; NANOPARTICLES; DEGRADATION;
D O I
10.3390/nano11071798
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The enzyme mimetic activity of nanomaterials has been applied in colorimetric assays and point-of-care diagnostics. Several nanomaterials have been exploited for their peroxidase mimetic activity toward 3,3 ',5,5 '-tetramethylbenzidine (TMB) in the presence of hydrogen peroxide. However, an efficient nanomaterial for the rapid and strong oxidation of TMB remains a strategic challenge. Therefore, in this study, we developed copper-loaded tin oxide (SnO2-Cu) nanocomposites that rapidly oxidize TMB. These nanocomposites have strong absorption at 650 nm and can be used for highly sensitive colorimetric detection. An environmentally friendly (green), rapid, easy, and cost-effective method was developed for the synthesis of these nanocomposites, which were characterized using ultraviolet-visible, energy-dispersive X-ray, and Fourier-transform infrared spectroscopy, as well as scanning electron microscopy. This is the first green synthesis of SnO2-Cu nanocomposites. Their enzyme mimetic activity, which was first studied here, was found to be strongly dependent on the temperature and pH value of the solution. The synthesized nanocomposites have the advantages of low cost, high stability, and ease of preparation for enzyme mimetic applications. Hence, SnO2-Cu nanocomposites are a promising alternative to peroxidase enzymes in colorimetric point-of-care diagnostics.
引用
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页数:13
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