UV-activated TiO2 nanoparticles for sensitively detecting ppb-level dimethyl sulfide at room temperature

IF 8 1区化学 Q1 CHEMISTRY, ANALYTICAL

Sensors and Actuators B: Chemical Pub Date : 2025-05-13 DOI:10.1016/j.snb.2025.137966

Dandan Rong , Gang Meng , Longqing Mi , Meng Li , Ruofan Zhang , Xiaohua Ji , Tiantian Dai , Hongtao Li , Xiaodong Fang , Libing You (professor) , Zanhong Deng (associate professor)

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Abstract

Dimethyl sulfide (DMS) is one kind of volatile sulfur compounds (VSCs) possessing disagreeable odor, with a low olfactory threshold around 20 ppb. Highly sensitive detection of DMS at room temperature (RT) is critically needed for emerging application with low power consumption, but it remains a significant challenge owing to its low reactivity. Herein, UV photoactivated titanium dioxide (TiO₂) nanoparticles (NPs) have been employed for detecting DMS at RT. An eco-friendly ultrasonic crushing solution spray technique was developed to prepare TiO₂ based sensors. An ultrahigh response of 30–500 ppb DMS and a low experimental limit of detection (R_a/R_g = 2.7@50 ppb) could be achieved at RT under UV light activation. This work opens a new avenue to achieve highly sensitive, energy-efficient sensors for trace VSCs detection at RT in ambient odor monitoring.

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紫外活化TiO2纳米颗粒用于室温下ppb级二甲基硫化物的灵敏检测

二甲基硫醚（DMS）是一种具有难闻气味的挥发性硫化合物（VSCs），其嗅觉阈值较低，约为20 ppb。室温下DMS的高灵敏度检测对于低功耗的新兴应用是至关重要的，但由于其低反应性，它仍然是一个重大挑战。本文采用紫外光活化二氧化钛纳米颗粒（TiO2）检测rt - DMS，开发了一种环保的超声波破碎溶液喷雾技术来制备二氧化钛纳米颗粒传感器。在紫外光激活下，在RT下可以获得30 ~ 500 ppb DMS的超高响应和较低的实验检测限（Ra/Rg = 2.7@50 ppb）。这项工作为在RT环境气味监测中实现痕量VSCs检测的高灵敏度，高能效传感器开辟了新的途径。

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

Sensors and Actuators B: Chemical 工程技术-电化学

CiteScore

14.60

自引率

11.90%

发文量

1776

审稿时长

3.2 months

期刊介绍： Sensors & Actuators, B: Chemical is an international journal focused on the research and development of chemical transducers. It covers chemical sensors and biosensors, chemical actuators, and analytical microsystems. The journal is interdisciplinary, aiming to publish original works showcasing substantial advancements beyond the current state of the art in these fields, with practical applicability to solving meaningful analytical problems. Review articles are accepted by invitation from an Editor of the journal.