Polyaniline/palladium nanohybrids for moisture and hydrogen detection.

Q1 Chemistry Chemistry Central Journal Pub Date : 2018-08-16 DOI:10.1186/s13065-018-0461-y
Chanaka Sandaruwan, H M P C K Herath, T S E F Karunarathne, S P Ratnayake, G A J Amaratunga, D P Dissanayake
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引用次数: 10

Abstract

Palladium nanoparticles display fascinating electronic, optical and catalytic properties, thus they can be used for various applications such as sensor fabrication. Conducting polymers such as polyaniline have also been widely used in sensor technology due to its cost effectiveness, versatility, and ease of synthesis. In this research, attention was given to unify the exceptional properties of these two materials and construct palladium nanoparticle coated polyaniline films to detect hydrogen and moisture. Electrochemical polymerization of aniline was carried out on gold sputtered epoxy resin boards. Polyaniline film was generated across a gap of 0.2 mm created by a scratch made on the gold coating prior to electrochemical polymerization. A palladium nanoparticle dispersion was prepared using sonochemical reduction method and coated on to polyaniline film using drop-drying technique. Polyaniline only films were also fabricated for comparative analysis. Sensitivity of films towards humidity and hydrogen was evaluated using impedance spectroscopy in the presence of the respective species. According to the results, polyaniline films exhibited an impedance drop in the presence of humidity and the response was significantly improved once palladium nanoparticles were incorporated. Interestingly, polyaniline only films did not respond to hydrogen. Nevertheless, palladium nanoparticle coated polyaniline films exhibited remarkable response towards hydrogen.

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用于水分和氢检测的聚苯胺/钯纳米杂化物。
钯纳米颗粒显示出迷人的电子、光学和催化性能,因此它们可以用于各种应用,如传感器制造。导电聚合物如聚苯胺因其成本效益、通用性和易于合成而广泛应用于传感器技术。本研究着眼于统一这两种材料的特殊性能,构建钯纳米粒子包覆聚苯胺膜来检测氢和水分。在环氧树脂板上进行了苯胺的电化学聚合。聚苯胺薄膜在电化学聚合之前在金涂层上产生的划痕产生0.2 mm的间隙上生成。采用声化学还原法制备了钯纳米分散体,并采用滴干技术将其涂覆在聚苯胺薄膜上。还制备了纯聚苯胺薄膜进行对比分析。薄膜对湿度和氢的敏感性在各自的物种的存在下使用阻抗谱进行了评估。结果表明,在湿度条件下,聚苯胺薄膜的阻抗下降,而钯纳米粒子的加入则显著改善了反应。有趣的是,聚苯胺薄膜对氢没有反应。然而,钯纳米颗粒包覆的聚苯胺膜对氢表现出显著的响应。
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来源期刊
Chemistry Central Journal
Chemistry Central Journal 化学-化学综合
CiteScore
4.40
自引率
0.00%
发文量
0
审稿时长
3.5 months
期刊介绍: BMC Chemistry is an open access, peer reviewed journal that considers all articles in the broad field of chemistry, including research on fundamental concepts, new developments and the application of chemical sciences to broad range of research fields, industry, and other disciplines. It provides an inclusive platform for the dissemination and discussion of chemistry to aid the advancement of all areas of research. Sections: -Analytical Chemistry -Organic Chemistry -Environmental and Energy Chemistry -Agricultural and Food Chemistry -Inorganic Chemistry -Medicinal Chemistry -Physical Chemistry -Materials and Macromolecular Chemistry -Green and Sustainable Chemistry
期刊最新文献
Design, synthesis and biological potential of heterocyclic benzoxazole scaffolds as promising antimicrobial and anticancer agents. Regio and stereoselective synthesis of anticancer spirooxindolopyrrolidine embedded piperidone heterocyclic hybrids derived from one-pot cascade protocol. Augmentation of hepatoprotective potential of Aegle marmelos in combination with piperine in carbon tetrachloride model in wistar rats. Polyaniline/palladium nanohybrids for moisture and hydrogen detection. Benzoxazole derivatives: design, synthesis and biological evaluation.
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