The materials exhibited optimal H2S detection at 250 掳C, demonstrating significant sensitivity (Response = 214.45) and fast response and recovery times (16.85 s and 46.93 s, respectively). Its performance was further validated through concentration-dependent studies, which showed high accuracy even at...
- 利用多孔Co3O4纳米片的电催化活性,可以催化CO、H2S等还原性气体分子在电极表面的电化学反应,产生可测量的电流信号,从而实现对CO、H2S等还原性气体分子的电化学检测; - 利用多孔Co3O4纳米片的吸附能力,可以吸附NH3、NOx等极性气体分子,在其表面形成吡啶类配合物或硝酸盐类物质,从而改变其光谱特征或电阻值,从而...
凭借POD-like活性，它能催化H2O2与TMB的反应，生成蓝色信号，轻松检测六价铬（Cr6+）和亚硝酸盐（NO2-）等氧化性离子。电催化作用下，它能转化CO、H2S等还原性气体，转化为可测量的电化学信号，精准捕捉这些气体分子。吸附力的超凡表现，使得NH3、NOx等极性气体分子在其表面形成特定化合物，通过光谱或...
Solution-processed rapid synthesis strategy of Co 3 O 4 for the sensitive and selective detection of H 2 SSolution-processed rapid synthesis strategy of Co 3 O 4 for the sensitive and selective detection of H 2 SMetal oxidesCBDCo_3O_4Gas...
本发明属于半导体氧化物气体传感器技术领域,具体涉及一种基于cowo4-co3o4异质结纳米结构敏感材料的二甲苯气体传感器及其制备方法。 背景技术: 二甲苯作为一种具有代表性的室内普遍存在的污染物,在涂料、橡胶、皮革等工业中广泛用作溶剂,在汽油、建筑装饰材料等中也有二甲苯的存在。二甲苯气体不仅会对环境造成污染而且...
Herein, we propose a H2S gas sensor with high sensitivity at and below room temperature, even as low as −30 °C, based on Cu2O/Co3O4 nano/microstructure heteroarrays prepared by 2D electrodeposition technique. This heteroarray was designed to be a multi-barrier system, and which was ...
It may be caused by the redox reaction between 10Cu–Co3O4 catalyst and H2S product after hydrolysis of COS. It is deduced that SO42− produced by H2S oxidation could bind to Co or Cu and its high electronegativity leading to a decrease in electron cloud density around Co or Cu, ...
(1)上述反应中涉及的元素原子的半径从大到小的顺序为Na>S>O>H.非金属性最强的元素原子的最外层排布式2s22p4,其电子的自旋方向共有2种.比较两种同主族非金属元素形成的单质的氧化性(用化学方程式表示)2H2S+O2=2S↓+2H2O.(2)能判断反应达到平衡状态的依据是(填序号)BC.A.混合气体的压强不变 B.混合气体...
结果发现,CuO、ZnO纳米粒子最佳修饰时间分别为20min、lh,修饰后纳米纤维表面粗糙,且出现了很多颗粒,说明CuO、ZnO在纳米纤维上生长所导致的,气敏性能也明显提高,尤其是ZnO纳米粒子修饰后的纳米纤维对H2S气体的灵敏度明显提高,工作温度也明显下降,说明ZnO纳米粒子修饰不仅能够提高灵敏性还可以改善其工作温度。关键词:静电...
A simple, fast, and cost-effective colorimetric nitrite (NO2−) sensor based on ZIF-67-derived Co3O4nanocomposite (ZCo-2 NC) structure has been developed. The prepared colorimetric sensor (ZCo-2 NC) was employed to sensitively detect NO2−in drinking water system by the exhibition of ...