树枝状硅钛杂化纳米球的制备及乙醚催化发光性能研究  

Fabrication of dendritic mesoporous silica & titania nanospheres as cataluminescence material for the detection of diethyl ether

作　　者：马熙 马慧 何娟 呼科科 张琰图[1] MA Xi;MA Hui;HE Juan;HU Keke;ZHANG Yantu(College of Chemistry and Chemical Engineering,Yan’an University,Yan'an 716000)

机构地区：[1]延安大学化学与化工学院,延安716000

出　　处：《分析试验室》2021年第5期497-502,共6页Chinese Journal of Analysis Laboratory

基　　金：国家重点研发计划项目(2019YFC1905801)资助。

摘　　要：采用两步后接枝法制备了树枝状硅钛杂化纳米球(DMSTNs),将DMSTNs均匀涂覆于陶瓷加热棒表面构建了一种新型乙醚催化发光传感平台。采用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射仪(XRD)、电感耦合等离子体发射光谱(ICP-OES)、傅里叶红外光谱(FT-IR)以及N_(2)吸附-解吸曲线对DMSTNs的形貌、结构、晶型、化学组成、孔体积、比表面积等进行表征,并讨论了乙醚在DMSTNs催化剂表面的催化发光机理。在优化条件下(440 nm吸收波长、380℃反应温度、270 mL/min载气流速),乙醚传感器催化发光强度与乙醚浓度在10~45 mmol/L范围内有良好的线性关系(R2=0.9933),检出限为4 mmol/L,相对标准偏差RSD为2.4%(S/N=3)。Dendritic mesoporous silica & titana nanospheres( DMSTNs) which were prepared by a two-step postgrafting method had been coated. DMSTNs had been uniformly coated on the surface of the ceramic heating rod to construct a novel catalytic platform for light-emitting ether sensing. The morphology,structure,crystal form,chemical composition,pore volume,and specific surface area of DMSTNs had been characterized by scanning electron microscope( SEM), transmission electron microscope( TEM), X-ray diffractometer( XRD),inductively coupled plasma emission spectroscopy( ICP-OES),fourier infrared spectroscopy( FT-IR) and N_(2) adsorption-desorption isotherm. The catalytic luminescence mechanism of ether on the surface of DMSTNs catalyst had been discussed as well. Under optimal conditions( absorption wavelength of 440 nm,reaction temperature of 380℃,carrier gas flow rate of 270 m L/min),there was a good linear relationship between the catalytic luminescence intensity of the ether sensor and the concentration of ether in the range of 10-45 mmol/L( R2= 0. 9933),the detection limit was 4 mmol/L,and the RSD was 2. 4%( S/N = 3).

关 键 词：催化发光 乙醚 DFNST纳米球 气体传感器 滤光片 

分 类 号：O656.31[理学—分析化学]