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Preparation method of PdPt/SnO2 (at) ZIF-8 gas-sensitive composite material and hydrogen sensing application of PdPt/SnO2 (at) ZIF-8 gas-sensitive composite material
The invention discloses a preparation method of a PdPt/SnO2 (at) ZIF-8 gas-sensitive composite material and hydrogen sensing application of the PdPt/SnO2 (at) ZIF-8 gas-sensitive composite material, and belongs to the technical field of semiconductor gas-sensitive materials. According to the gas-sensitive composite material, sodium stannate serves as a tin source, urea serves as a precipitator, and SnO2 nanoparticles are obtained through a hydrothermal method; taking palladium chloride as a palladium source, chloroplatinic acid hexahydrate as a platinum source and ascorbic acid as a reducing agent, and combining with the prepared SnO2 by adopting a water bath method to obtain a PdPt/SnO2 composite material; the preparation method comprises the following steps: coating an Al2O3 ceramic substrate with PdPt/SnO2 to obtain a PdPt/SnO2 gas sensitive element, and growing a ZIF-8 shell layer on the surface of the PdPt/SnO2 gas sensitive element in a mixed solution of zinc nitrate hexahydrate and 2-methylimidazole by adopting a chemical bath precipitation method to obtain the PdPt/SnO2 ZIF-8 gas sensitive composite material. The PdPt/SnO2 (at) ZIF-8 gas-sensitive composite material disclosed by the invention can be used for realizing hydrogen detection at room temperature, ultrahigh response (1000ppm (at) 365489), ultrafast (1s) and high selectivity.
本发明公开了一种PdPt/SnO2@ZIF‑8气敏复合材料的制备方法及其氢气传感应用，属于半导体气敏材料技术领域。本发明的气敏复合材料以锡酸钠为锡源，尿素为沉淀剂，采用水热法得到SnO2纳米颗粒；以氯化钯为钯源，六水合氯铂酸为铂源，抗坏血酸为还原剂，采用水浴法与制备的SnO2结合得到PdPt/SnO2复合材料；将PdPt/SnO2涂覆在Al2O3陶瓷基片上得到PdPt/SnO2气敏元件，在六水合硝酸锌和2‑甲基咪唑的混合溶液中，采用化学浴沉淀法，在PdPt/SnO2气敏元件表面生长ZIF‑8壳层得到PdPt/SnO2@ZIF‑8气敏复合材料。本发明的PdPt/SnO2@ZIF‑8气敏复合材料可实现室温、超高响应（1000ppm@365489）、超快速（1 s）和高选择性氢气检测。
Preparation method of PdPt/SnO2 (at) ZIF-8 gas-sensitive composite material and hydrogen sensing application of PdPt/SnO2 (at) ZIF-8 gas-sensitive composite material
The invention discloses a preparation method of a PdPt/SnO2 (at) ZIF-8 gas-sensitive composite material and hydrogen sensing application of the PdPt/SnO2 (at) ZIF-8 gas-sensitive composite material, and belongs to the technical field of semiconductor gas-sensitive materials. According to the gas-sensitive composite material, sodium stannate serves as a tin source, urea serves as a precipitator, and SnO2 nanoparticles are obtained through a hydrothermal method; taking palladium chloride as a palladium source, chloroplatinic acid hexahydrate as a platinum source and ascorbic acid as a reducing agent, and combining with the prepared SnO2 by adopting a water bath method to obtain a PdPt/SnO2 composite material; the preparation method comprises the following steps: coating an Al2O3 ceramic substrate with PdPt/SnO2 to obtain a PdPt/SnO2 gas sensitive element, and growing a ZIF-8 shell layer on the surface of the PdPt/SnO2 gas sensitive element in a mixed solution of zinc nitrate hexahydrate and 2-methylimidazole by adopting a chemical bath precipitation method to obtain the PdPt/SnO2 ZIF-8 gas sensitive composite material. The PdPt/SnO2 (at) ZIF-8 gas-sensitive composite material disclosed by the invention can be used for realizing hydrogen detection at room temperature, ultrahigh response (1000ppm (at) 365489), ultrafast (1s) and high selectivity.
本发明公开了一种PdPt/SnO2@ZIF‑8气敏复合材料的制备方法及其氢气传感应用，属于半导体气敏材料技术领域。本发明的气敏复合材料以锡酸钠为锡源，尿素为沉淀剂，采用水热法得到SnO2纳米颗粒；以氯化钯为钯源，六水合氯铂酸为铂源，抗坏血酸为还原剂，采用水浴法与制备的SnO2结合得到PdPt/SnO2复合材料；将PdPt/SnO2涂覆在Al2O3陶瓷基片上得到PdPt/SnO2气敏元件，在六水合硝酸锌和2‑甲基咪唑的混合溶液中，采用化学浴沉淀法，在PdPt/SnO2气敏元件表面生长ZIF‑8壳层得到PdPt/SnO2@ZIF‑8气敏复合材料。本发明的PdPt/SnO2@ZIF‑8气敏复合材料可实现室温、超高响应（1000ppm@365489）、超快速（1 s）和高选择性氢气检测。
Preparation method of PdPt/SnO2 (at) ZIF-8 gas-sensitive composite material and hydrogen sensing application of PdPt/SnO2 (at) ZIF-8 gas-sensitive composite material
一种PdPt/SnO2@ZIF-8气敏复合材料的制备方法及其氢气传感应用
GAO WEI (Autor:in) / MENG XIAONING (Autor:in)
14.11.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
G01N
Untersuchen oder Analysieren von Stoffen durch Bestimmen ihrer chemischen oder physikalischen Eigenschaften
,
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
/
C01G
Verbindungen der von den Unterklassen C01D oder C01F nicht umfassten Metalle
,
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
/
C04B
Kalk
,
LIME
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