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WO3氣敏材料的制備及H2敏感性能
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國(guó)家自然科學(xué)基金 (50872064)；國(guó)家“973”項(xiàng)目 (2007CB936601)；國(guó)家自然基金重點(diǎn)項(xiàng)目 (50931002)


Preparation of WO3 Gas Sensor and H2-Sensing Properties
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    摘要:

    采用簡(jiǎn)易水熱法并通過控制原料Na2WO4·2H2O和鹽酸的配比制備了六方相WO3納米棒及斜方相WO3納米顆粒氣敏材料，并用絲網(wǎng)印刷法將WO3材料制備成氣敏元件。測(cè)試了氣敏元件在200~350 ℃對(duì)低濃度 (5~100) μL/L H2的氣敏性能。結(jié)果表明：材料具有良好的響應(yīng)-恢復(fù)特性、重復(fù)性和穩(wěn)定性。當(dāng)n(Na2WO4·2H2O):n(HCl) = 1: 2時(shí)，材料具有最高的靈敏度和穩(wěn)定性；在該測(cè)試溫度和H2濃度范圍內(nèi)，隨溫度和H2濃度的升高，材料的靈敏度呈上升趨勢(shì)

    Abstract:

    Hexagonal WO3 nanorods and orthorhombic WO3 nanoparticles were prepared by a simple hydrothermal method with Na2WO4·2H2O and hydrochloric acid as raw materials, and then WO3 was prepared into gas sensor by a screen printing method. The gas sensitivity of the sensor was investigated in the H2 concentration range from 5 to 100 μL/L at 200, 250, 300 and 350 oC. The results show that the sensitivity, stability and response-restoring characteristics of the H2 gas sensors are all excellent. When n(Na2WO4·2H2O):n(HCl) = 1:2, the sensitivity and stability of the product are the highest. And the sensitivity of the H2 gas sensor gradually ascends as the temperature and the H2 concentration are increased.

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蔡文濤,唐子龍,徐宇興,張中太. WO3氣敏材料的制備及H2敏感性能[J].稀有金屬材料與工程,2011,40(11):2051~2054.[Cai Wentao, Tang Zilong, Xu Yuxing, Zhang Zhongtai. Preparation of WO3 Gas Sensor and H2-Sensing Properties[J]. Rare Metal Materials and Engineering,2011,40(11):2051~2054.]
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  • 收稿日期:2010-11-30
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