Interface engineering of highly sensitive and humidity independent PPy/SnO2 nanocomposites for room temperature ammonia gas detection

IF 2.2 4区化学 Q2 Engineering

Chemical Papers Pub Date : 2025-01-31 DOI:10.1007/s11696-025-03906-y

A. J. Heiner, S. Imran Hussain

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引用次数: 0

Abstract

Tin oxide (SnO₂) nanoparticles have been synthesized by Sol–Gel method. Polypyrrole (PPy)–tin oxide (SnO₂) hybrid nanocomposite has synthesized by chemical polymerization of PPy in the presence of SnO₂ nanoparticles. The band gap energy of the hybrid nanocomposite is calculated as 3.39 eV using UV–VIS absorption spectroscopy. The synthesized SnO₂ nanoparticle is tetragonal rutile structure which has been confirmed using X-ray diffraction spectroscopy. Scanning electron microscope is involved in the morphological analysis of the hybrid nanocomposite. Sensing electrodes are fabricated by spin coating of the sensing material on printed circuit board. The electrodes have been investigated for their sensing behaviour towards oxygen (O₂), hydrogen (H₂), ammonia (NH₃), carbon dioxide (CO₂) and liquid petroleum gas at room temperature. The fabricated electrode is selectively sensitive to 1 ppm of NH₃ with improved sensitivity (55%), response time (20 s) and recovery time (8 s). The electrode shows stable sensitivity towards NH₃ at different ranges of relative humidity (% RH) (30%, 50% and 80%). The electrode maintains 85.33% stability for the period of 50 days.

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室温氨气检测用高灵敏度、不依赖湿度的PPy/SnO2纳米复合材料界面工程

采用溶胶-凝胶法制备了氧化锡纳米颗粒。以聚吡咯(PPy) -氧化锡（SnO2）为原料，在SnO2纳米粒子存在下，通过化学聚合合成了聚吡咯-氧化锡杂化纳米复合材料。利用紫外-可见吸收光谱计算得到复合材料的带隙能为3.39 eV。合成的SnO2纳米颗粒为四方金红石结构，经x射线衍射谱分析证实。利用扫描电子显微镜对复合材料进行了形貌分析。传感电极是通过在印刷电路板上对传感材料进行自旋镀膜制备的。研究了电极在室温下对氧（O2）、氢（H2）、氨（NH3）、二氧化碳（CO2）和液化石油气的传感行为。在不同相对湿度（% RH）范围内（30%、50%和80%），电极对NH3的灵敏度为55%，响应时间为20 s，恢复时间为8 s。该电极在50天内保持85.33%的稳定性。

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来源期刊

Chemical Papers Chemical Engineering-General Chemical Engineering

CiteScore

3.30

自引率

4.50%

发文量

590

期刊介绍： Chemical Papers is a peer-reviewed, international journal devoted to basic and applied chemical research. It has a broad scope covering the chemical sciences, but favors interdisciplinary research and studies that bring chemistry together with other disciplines.