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以Zn(NO3)2和Na2WO4为主要原料,利用水热法制备了一系列的纳米ZnWO4,探讨了水热条件对产物物相和形貌的影响,并研究了不同形貌样品对甲醛、苯、酒精、乙酸和氨气等的敏感性能。结果表明:水热条件对产物的物相和形貌有较大的影响;在适宜的水热条件下,可成功制备出ZnWO4纳米颗粒和纳米棒;所制ZnWO4为n型半导体气敏材料;在pH=7,水热温度为180℃时反应24 h所获得的ZnWO4长纳米棒样品制成的元件在305℃时对体积分数为1 000×10–6的酒精蒸气的灵敏度为47.5,并具有较好的选择性,响应时间和恢复时间分别为10 s和24 s。
Zn (NO3) 2 and Na2WO4 were used as raw materials to prepare a series of nano-ZnWO4 by hydrothermal method. The effects of hydrothermal conditions on the morphology and phase of the product were discussed. The effects of different morphologies on the formation of formaldehyde, benzene , Alcohol, acetic acid and ammonia and other sensitive properties. The results show that the hydrothermal conditions have great influence on the phase and morphology of the product. ZnWO4 nanoparticles and nanorods can be successfully prepared under suitable hydrothermal conditions. The prepared ZnWO4 is n-type semiconductor gas sensitive material. At pH = 7, hydrothermal temperature of 180 ℃ for 24 h obtained ZnWO4 long nanorods samples made of components at 305 ℃ on the volume fraction of 1 000 × 10-6 alcohol vapor sensitivity of 47.5, and With good selectivity, response time and recovery time were 10 s and 24 s, respectively.