• 专利标题:   Preparing gas sensor based on graphene oxide-nickel-tindioxide micro-nano porous sensitive film useful in detecting multiple volatile organic compounds gas comprises dissolving pentahydrate stannic chloride and nickel nitrate, cleaning, hydrophilic processing surface and annealing.
  • 专利号:   CN115716712-A
  • 发明人:   CAI W, ZHAO Q, ZHANG W, ZHANG H, XIE D, ZOU K, ZHANG Q, ZHAO Y, ZHANG X, LEI B
  • 专利权人:   ANHUI XIANGHE ENVIRONMENTAL TESTING CO, CHINESE ACAD SCI HEFEI INST PHYS SCI
  • 国际专利分类:   C01B032/198, C01G019/02, C03C017/00, C03C017/22, G01N027/12
  • 专利详细信息:   CN115716712-A 28 Feb 2023 C03C-017/00 202322 Chinese
  • 申请详细信息:   CN115716712-A CN11389706 08 Nov 2022
  • 优先权号:   CN11389706

▎ 摘  要

NOVELTY - Preparing gas sensor based on graphene oxide-nickel-tindioxide micro-nano porous sensitive film, comprises (i) dissolving pentahydrate stannic chloride, nickel nitrate, nonahydrate aluminum nitrate, graphene as precursor in water, ultrasonicating to dissolve to obtain the precursor solution; (ii) forming orderly arranged single-layer organic colloid ball array layer on flat substrate, soaking flat substrate into the precursor solution, separating organic colloid ball array layer from flat substrate; (iii) cleaning and hydrophilic processing surface of gas sensor device, transferring organic colloid ball array layer floating in the precursor solution to surface of the gas sensor device, making the organic colloid ball array layer completely cover surface of device, filling precursor solution in the gap between the organic colloid ball array layer and device and between adjacent organic colloid balls, placing in an oven and drying; and (iv) annealing the dried gas sensor device. USE - The sensor is useful in detecting multiple volatile organic compounds gas (claimed). ADVANTAGE - The gas sensor has high sensitivity to VOC gas (e.g. alcohol, aldehydes, benzene and ketone), better selectivity, and ensures lowest detection limit can reach 5ppb, basically no response to interfering gases e.g. methane, hydrogen, carbon monoxide, nitric oxide and nitrogen dioxide. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for gas sensor based on graphene oxide-nickel-tindioxide micro-nano porous sensitive film.