Porous and Homogeneous Nanoheterojunction-Accumulating PdO@ZnO Structure for Exhaled Breath Ammonia Sensing

IF 4.3 2区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Pub Date : 2024-11-13 DOI:10.1021/acs.inorgchem.4c04094

Lifei Yin, Yutao Liu, Zhengxuan Song, Yuxin Wang, Yang Chen, Jinping Li, Libo Li, Jia Yao

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Abstract

The functional gas sensor device plays a pivotal role in intelligent medical treatment, among which metal oxide semiconductors are widely studied because of their inexpensiveness and ease of fabrication. However, the metal oxide sensors present a significant challenge in detecting NH₃ at ppm levels within complex exhaled gases. Herein, the ZnO/PdO-x series were prepared by in situ loading palladium particles and calcining using nano-ZIF-8 as a precursor, which not only provided more transport path for ammonia adsorption but also achieved homogeneous nanoheterojunction accumulation structure. The tailor-made ZnO/PdO-2 sensor exhibits the optimum gas sensitivity, with a response value of 5.56 for 100 ppm of NH₃ at 160 °C and a lower detection limit of 0.75 ppm. Particularly, it has a clear quantitative response to the actual exhaled gas of liver and kidney patients. By elucidating the intrinsic link between the in situ loading of MOF templates and the sensing mechanism, it is expected to broaden the rational design of metal-oxide sensors and thus provide an effective method for clinical detection.

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用于呼出气体氨传感的多孔同质纳米异质结-累积 PdO@ZnO 结构

功能气体传感器设备在智能医疗中发挥着举足轻重的作用，其中金属氧化物半导体因其不敏感和易于制造而被广泛研究。然而，金属氧化物传感器在检测复杂呼出气体中ppm级的NH3时面临巨大挑战。本文以纳米 ZIF-8 为前驱体，通过原位负载钯颗粒和煅烧制备了 ZnO/PdO-x 系列，不仅为氨吸附提供了更多的传输路径，还实现了均匀的纳米异质结堆积结构。量身定制的 ZnO/PdO-2 传感器具有最佳的气体灵敏度，在 160 °C、100 ppm 的 NH3 条件下响应值为 5.56，检测下限为 0.75 ppm。特别是，它对肝脏和肾脏患者的实际呼出气体具有明显的定量响应。通过阐明 MOF 模板原位负载与传感机制之间的内在联系，有望拓宽金属氧化物传感器的合理设计，从而为临床检测提供一种有效的方法。

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

Inorganic Chemistry 化学-无机化学与核化学

CiteScore

7.60

自引率

13.00%

发文量

1960

审稿时长

1.9 months

期刊介绍： Inorganic Chemistry publishes fundamental studies in all phases of inorganic chemistry. Coverage includes experimental and theoretical reports on quantitative studies of structure and thermodynamics, kinetics, mechanisms of inorganic reactions, bioinorganic chemistry, and relevant aspects of organometallic chemistry, solid-state phenomena, and chemical bonding theory. Emphasis is placed on the synthesis, structure, thermodynamics, reactivity, spectroscopy, and bonding properties of significant new and known compounds.