检出限
过氧化氢
沸石
电化学
吸附
材料科学
催化作用
电化学气体传感器
电极
线性范围
无机化学
循环伏安法
二氧化钛
化学工程
化学
色谱法
有机化学
物理化学
复合材料
工程类
作者
Yuying Jiang,Xiyuan Tong,E Yifeng,Pengyan Wei,Fang Fang,Peng Chen,Kun Qian
标识
DOI:10.1016/j.jallcom.2023.171866
摘要
Hydrogen peroxide (H2O2) is widely developed in various fields such as industry, biochemistry, and the environment. A titanium dioxide-doped Linde Type-A (TiO2 LTA) zeolite has been hydrothermally prepared and used as an electrochemical catalyst for the detection of H2O2. The morphology and structure of the TiO2 LTA zeolite were analyzed through a series of characterization tests. Results indicated that the TiO2 was partly and highly dispersed on the zeolitic surface, which improved the catalytic site. Moreover, the zeolite showed good adsorption and adsorbed more H2O2 molecules, improving the sensitivity of detection. H2O2 was measured accurately through the square wave voltammetry (SWV) by the TiO2-doped LTA modified electrode (TiO2 LTA/GCE). The electrode had the characteristics of a wide detection range, good stability, and good repeatability, with a detection limit (LOD) of 10 nM, linear range of 78.0 nM-19.9 μM and 96.6-3848.8 μM. In addition, the sensor has been successfully used for analysis in tap water and cell fluid, which has the potential to become a candidate material for environmental and biological sensing applications.
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