Chemiluminescence Reactions of a Luminol System Catalyzed by ZnO Nanoparticles
Chemiluminescence Reactions of a Luminol System Catalyzed by ZnO Nanoparticles
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DOI：
10.1021/jp808312j
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发表时间：
2009-01
影响因子：
3.7
通讯作者：
Shifeng Li;Xin-ming Zhang;Wan-Xin Du;Y. Ni;Xian‐Wen Wei
中科院分区：
文献类型：
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作者：
Shifeng Li;Xin-ming Zhang;Wan-Xin Du;Y. Ni;Xian‐Wen Wei
采用溶胶-凝胶法制备了ZnO纳米粒子，并通过紫外-可见光谱和光致发光光谱对其进行了表征。研究了ZnO纳米粒子对鲁米诺-H2 O2化学发光体系的影响。结果表明，粒径范围为6 ~ 21 nm的ZnO纳米粒子可以增强鲁米诺-H2 O2体系的化学发光，当ZnO纳米粒子的平均粒径为6 nm时，体系的化学发光信号最强。为了研究CL的增强机制，我们使用UV-可见光谱，FT-IR光谱和CL光谱来研究在存在/不存在ZnO纳米颗粒的情况下CL反应前后的光学性质。ZnO纳米粒子对鲁米诺-H2 O2体系的化学发光增强作用可能来源于ZnO纳米粒子的催化作用，它可以催化H2 O2分解产生羟基自由基和超氧阴离子等活性中间体。然后，生成的羟基自由基...
Colloidal ZnO nanoparticles were synthesized by the sol−gel method and were characterized by UV−visible spectroscopy and photoluminescence spectroscopy. The effect of ZnO nanoparticles on the luminol−H2O2 chemiluminescence (CL) system, a popular model CL system, was investigated. It was found that ZnO nanoparticles with a size regime from 6 to 21 nm could enhance the CL of the luminol−H2O2 system, and the strongest CL signal was obtained when the mean diameter of ZnO nanoparticles was 6 nm. To investigate the enhancement mechanism of the CL, we used UV−visible spectroscopy, FT-IR spectroscopy, and CL spectroscopy to study optical properties before and after the CL reaction in the presence/absence of ZnO nanoparticles. The CL enhancement of the luminol−H2O2 system by ZnO nanoparticles should originate from the catalysis of ZnO nanoparticles, which could catalyze the decomposition of H2O2 to produce some reactive intermediates such as hydroxyl radical and superoxide anion. Then, the resulting hydroxyl radic...