The catalytic effect of Pt0 species on Pt/ZnO nanorods for robust triethylamine sensing detection

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2024-10-22 DOI:10.1016/j.materresbull.2024.113156

Li-Juan Yue , Su-Mei Shen , Wen-Jie Zhang , Fei-Long Gong, Xuan-Yu Yang, Yong-Hui Zhang

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Abstract

The noble metal Pt modified ZnO nanomaterials are widely used to improve their gas sensing performance. However, the relationship between the catalytic effect of Pt^x+ species on the oxygen vacancies formation and gas-sensing performance is still unclear. Herein, the Pt/ZnO nanorods are successfully synthesized by using hydrothermal method, and the content of Pt⁰ species are finely tuned through treating in different atmospheres. Notably, Pt modified ZnO calcined under Ar/H₂ (Pt/ZnO-3) exhibits excellent sensing response (R_a/R_g = 2196, 81 times higher than pure ZnO) to 50 ppm triethylamine at 140 °C, with fast response/recovery behavior, low limit of detection, and superior selectivity. Detailed structural characterization indicates that Pt nanoparticle modification reduces the band gap of the samples. In addition, the high content of Pt⁰ species promotes the generation of adsorbed oxygen, which significantly enhances the gas-sensitive performance of the sensor. This work demonstrates that the concentration of Pt⁰ species greatly affects gas-sensing performance.

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Pt/ZnO 纳米棒上的 Pt0 物种对三乙胺传感检测的催化作用

贵金属铂修饰的 ZnO 纳米材料被广泛用于提高其气体传感性能。然而，Ptx+物种对氧空位形成的催化作用与气体传感性能之间的关系尚不清楚。本文采用水热法成功合成了 Pt/ZnO 纳米棒，并通过在不同气氛中的处理对 Pt0 物种的含量进行了微调。值得注意的是，在 Ar/H2 条件下煅烧的铂修饰氧化锌（Pt/ZnO-3）在 140 °C 下对 50 ppm 的三乙胺具有极佳的传感响应（Ra/Rg = 2196，是纯氧化锌的 81 倍）、快速响应/恢复行为、低检测限和卓越的选择性。详细的结构表征表明，铂纳米粒子修饰降低了样品的带隙。此外，高含量的 Pt0 物种促进了吸附氧的生成，从而显著提高了传感器的气敏性能。这项工作表明，Pt0 物种的浓度会极大地影响气敏性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.