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Ammonia Sensing by Sn1–xVxO2 Mesoporous Nanoparticles
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-07-06 , DOI: 10.1021/acsanm.0c01183 Nirman Chakraborty 1 , Ambarish Sanyal 1 , Sagnik Das 1 , Debdulal Saha 1 , Samar Kumar Medda 1 , Swastik Mondal 1
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-07-06 , DOI: 10.1021/acsanm.0c01183 Nirman Chakraborty 1 , Ambarish Sanyal 1 , Sagnik Das 1 , Debdulal Saha 1 , Samar Kumar Medda 1 , Swastik Mondal 1
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Chemiresistive gas sensing by metal oxide based materials has been usually explained in terms of surface chemistry and band structure modifications due to factors such as chemical composition, particle surface to volume ratio, material morphology, temperature, and surface oxygen vacancy. In this work, keeping parameters such as particle size, morphology, surface area, temperature, and surface oxygen vacancy fixed, we have for the first time attempted to delineate quantitatively the role of crystal structure and surface electronic states in improving gas sensing responses of doped nanosized metal oxide samples. While vanadium-doped tin oxide samples show a nearly 4-fold increase in 10 ppm ammonia sensing responses, the Sn0.696V0.304O2 sample shows ∼1.2 times more sensing response as compared to Sn0.657V0.343O2. The ammonia sensing behavior has been found to be directly correlated to crystal structures and concentrations of various oxidation states of vanadium dopants present in the studied samples. Detailed comparative analysis of crystal and electronic structures of the samples has revealed the mechanism of enhancement in the ammonia sensing behavior of vanadium-doped tin oxides. It is expected that similar mechanisms might be responsible for enhancement in gas sensing properties of other metal oxide based systems.
中文翻译：
Sn 1– x V x O 2介孔纳米颗粒的氨感测
由于基于诸如化学成分，颗粒表面与体积之比，材料形态，温度和表面氧空位的因素，通常基于表面化学和能带结构的改变来解释基于金属氧化物的材料的化学气体的传感。在这项工作中，在保持诸如粒径，形态，表面积，温度和表面氧空位等参数不变的情况下，我们首次尝试定量描述晶体结构和表面电子态在改善掺杂气体感测响应中的作用。纳米金属氧化物样品。钒掺杂的氧化锡样品显示10 ppm的氨感测响应几乎增加了4倍，而Sn 0.696 V 0.304 O 2样品显示的传感响应是Sn 0.657 V 0.343 O 2的约1.2倍。已发现氨感测行为与所研究样品中存在的钒掺杂剂的晶体结构和各种氧化态浓度直接相关。样品的晶体和电子结构的详细比较分析揭示了钒掺杂氧化锡氨感测行为增强的机理。预期类似的机制可能负责增强其他基于金属氧化物的系统的气敏特性。
更新日期：2020-08-28
中文翻译：
Sn 1– x V x O 2介孔纳米颗粒的氨感测
由于基于诸如化学成分，颗粒表面与体积之比，材料形态，温度和表面氧空位的因素，通常基于表面化学和能带结构的改变来解释基于金属氧化物的材料的化学气体的传感。在这项工作中，在保持诸如粒径，形态，表面积，温度和表面氧空位等参数不变的情况下，我们首次尝试定量描述晶体结构和表面电子态在改善掺杂气体感测响应中的作用。纳米金属氧化物样品。钒掺杂的氧化锡样品显示10 ppm的氨感测响应几乎增加了4倍，而Sn 0.696 V 0.304 O 2样品显示的传感响应是Sn 0.657 V 0.343 O 2的约1.2倍。已发现氨感测行为与所研究样品中存在的钒掺杂剂的晶体结构和各种氧化态浓度直接相关。样品的晶体和电子结构的详细比较分析揭示了钒掺杂氧化锡氨感测行为增强的机理。预期类似的机制可能负责增强其他基于金属氧化物的系统的气敏特性。
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