Cataluminescence gas sensor for ketones based on nanosized NaYF₄:Er

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• 作者：Jie TangAuthor Vitae ; Hongjie SongAuthor Vitae ; Binrong ZengAuthor Vitae ; Lichun Zhang ; ^{zhanglichun@scu.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Yi LvAuthor Vitae
• 关键词：NaYF4 ; Gas sensor ; Cataluminescence ; Ketones ; Dope
• 刊名：Sensors & Actuators: B. Chemical
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：222
• 期：Complete
• 页码：300-306
• 全文大小：2064 K

文摘

A novel gas sensor toward ketones based on cataluminescence generated on the surface of nanosized NaYF₄:Er was developed. The sensing materials NaYF₄:Er was synthesized by a simple hydrothermal method and characterized by powder X-ray diffraction, scanning electron microscope and energy dispersive X-ray spectroscopy. The effect of Er³⁺ doping concentration and crystallinity of NaYF₄:Er on the CTL intensity were studied. When the Er³⁺ doping concentration reaches 20%, the materials show excellent sensing characteristics for ketones. Under the optimal experimental conditions, as represented by the acetone and butanone, the gas sensor has fast responses (3 s) and relatively low work temperature (250 °C). The linear range of cataluminescence intensity versus concentration were 2.388–143.28 渭g mL⁻¹ for acetone and 2.45–49.0 渭g mL⁻¹ for butanone, with a detection limit (signal-to-noise ratio is 3) of 1.7 渭g mL⁻¹ and 0.7 渭g mL⁻¹, respectively. Foreign 11 substances in common have little interference which indicates the high selectivity of the CTL sensor for ketones.