溶胶-凝胶法合成氧化硅纳米颗粒：探索气体传感和光催化应用

IF 3.4 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Mechanical and Materials Engineering Pub Date : 2025-02-04 DOI:10.1186/s40712-025-00209-8

Laxmi D. Sonawane, Abhinay S. Mandawade, Anil B. Gite, Sarika D. Shinde, Ganesh E. Patil, Latesh K. Nikam, Vishal H. Goswami, Ramesh B. Bhise, Pradip B. Sarawade, Mahendra S. Shinde

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引用次数: 0

摘要

本研究采用溶胶-凝胶法制备了氧化硅纳米颗粒（SiO2）。通过各种技术对合成材料进行了表征。傅里叶变换红外光谱（FTIR）揭示了Si-O-Si键对应的吸收带。紫外-可见（UV-Vis）光谱分析表明带隙能量为5 eV。x射线衍射（XRD）分析显示出宽峰，证实了材料的无定形性质。场发射扫描电镜（FESEM）进一步证实了SiO2纳米颗粒的球形形貌。研究了二氧化硅纳米粒子对MB染料的光催化降解，揭示了其良好的降解性能。即使是少量的SiO2 NPs，在240 min内对MB的降解也达到了69.20%左右，材料的速率常数为0.001 min−1。在家用气体传感器装置上测试了SiO2 NPs在室温至300℃范围内对不同气体的气敏性能，包括乙醇、甲醇、CO2、LPG、H2S、NH3、O2和Cl2。在这些材料中，SiO₂NPs对H₂S气体的响应最强，在浓度为100 ppm时表现出优异的气敏性能。反应时间为18 S，快速恢复时间约为22 S

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Sol–gel synthesis of silicon oxide (SiO2) nanoparticles: exploring gas sensing and photocatalytic applications

In this research, silicon oxide (SiO₂) nanoparticles (NPs) were synthesized using the sol–gel method. The synthesized materials were characterized through various techniques. Fourier transform infrared spectroscopy (FTIR) revealed the absorption band corresponding to Si–O–Si bonds. Ultraviolet–visible (UV–Vis) spectroscopy analysis indicated a band gap energy of 5 eV. X-ray diffraction (XRD) analysis displayed a broad peak, confirming the amorphous nature of the material. Field emission scanning electron microscopy (FESEM) further demonstrated a spherical morphology of the SiO₂ NPs. The photocatalytic degradation of MB dye using SiO₂ NPs has been examined, revealing promising and improved degradation properties. Even a small amount of SiO₂ NPs achieved around 69.20% degradation of MB within 240 min, with the rate constant for the material being 0.001 min⁻¹. The gas sensing properties of the SiO₂ NPs were tested on domestic gas sensor units for different gases, including ethanol, methanol, CO₂, LPG, H₂S, NH₃, O₂, and Cl₂, at temperatures ranging from room temperature to 300 °C. Among these materials, SiO₂ NPs displayed the strongest response to H₂S gas, showing outstanding gas-sensing performance at a concentration of 100 ppm. The response time was 18 S, with a quick recovery time of approximately 22 S.