Wang Shixuan, Gao Juan, Wang Yanfen, Lu Haowen, Yang Sen, Zheng Lingcheng, Li Yang, He Gang
School of Mechanics and Photoelectric Physics, Anhui University of Science and Technology, Huainan, 232001, People's Republic of China.
The First Affiliated Hospital of Anhui University of Science and Technology (Huainan First People's Hospital), Huainan, 232001, People's Republic of China.
Mikrochim Acta. 2024 May 29;191(6):353. doi: 10.1007/s00604-024-06429-7.
Organic pollutant detection has caused widespread concern regarding due to their potential environmental and human health risks. In this work, a nitrogen-doped titanium dioxide/silver oxide (N-TiO/AgO) composite has been designed as a sensitive photoelectrochemical (PEC) monitoring platform of organic dyes. Sensitive determination relies on the outstanding PEC performance of N-TiO/AgO. The improved PEC performance stems from the effective separation of photocarriers and the extended light response range provided by the narrowing bandgap and a p-n junction with N-TiO/AgO. The N-TiO/AgO electrode exhibits a photocurrent density of up to 2.2 mA/cm, demonstrating three times increase compared with the photocurrent density observed with the pure TiO film. The linear detection range for rhodamine B (RhB), methylene blue (MB), and methyl orange (MO) is 0.2 ng/mL to 10 μg/mL with an ultrasensitive detection limit of 0.2 ng/mL without bias voltage. Due to the outstanding photocurrent density and sensitive response to organic pollutants, the N-TiO/AgO PEC sensor provided a promising analytical method to detect environmental organic dyes.
由于有机污染物具有潜在的环境和人类健康风险，其检测已引起广泛关注。在本研究中，氮掺杂二氧化钛/氧化银（N-TiO₂/Ag₂O）复合材料被设计为一种用于有机染料的灵敏光电化学（PEC）监测平台。灵敏的测定依赖于N-TiO₂/Ag₂O出色的PEC性能。PEC性能的提高源于光生载流子的有效分离以及由窄带隙和N-TiO₂/Ag₂O的p-n结所提供的扩展光响应范围。N-TiO₂/Ag₂O电极表现出高达2.2 mA/cm²的光电流密度，与纯TiO₂薄膜相比，光电流密度增加了两倍。罗丹明B（RhB）、亚甲基蓝（MB）和甲基橙（MO）的线性检测范围为0.2 ng/mL至10 μg/mL，在无偏压情况下超灵敏检测限为0.2 ng/mL。由于出色的光电流密度和对有机污染物的灵敏响应，N-TiO₂/Ag₂O PEC传感器为检测环境有机染料提供了一种有前景的分析方法。
