CAJ | 학술논문

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1000×10–6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。
이Zn(NO3)2화Na2WO4위주요원료，이용수열법제비료일계렬적납미ZnWO4，탐토료수열조건대산물물상화형모적영향，병연구료불동형모양품대갑철、분、주정、을산화안기등적민감성능。결과표명：수열조건대산물적물상화형모유교대적영향；재괄의적수열조건하，가성공제비출 ZnWO4납미과립화납미봉；소제 ZnWO4위n형반도체기민재료；재pH=7，수열온도위180℃시반응24 h소획득적ZnWO4장납미봉양품제성적원건재305℃시대체적분수위1000×10–6적주정증기적령민도위47.5，병구유교호적선택성，향응시간화회복시간분별위10 s화24 s。
A series of ZnWO4 nano-powders were prepared through a hydrothermal process with Zn(NO3)2 and Na2WO4 as the main raw materials. The influences of the hydrothermal reaction conditions on the phase compositions and the morphologies of the products were discussed, and the gas-sensing properties of the ZnWO4 with different morphologies to HCHO, C6H6, C2H5OH, CH3COOH and NH3 were investigated as well. The experimental results show that the hydrothermal reaction conditions significantly affect the phase and morphology of the resultants. ZnWO4 nanoparticles and nanorods can be obtained under appropriate conditions. The prepared ZnWO4 is a kind of n-type semiconductor gas sensing material. Furthermore, the gas sensor based on the ZnWO4 nanorods sample prepared by hydrothermal treatment at 180 ℃with pH =7 for 24 h exhibits excellent selectivity as well as high sensitivity (S=47.5) to alcohol of 1 000×10–6 (volume fraction) at 305 ℃, with the response time and recovery time of 10 s and 24 s.