Scholarlink

<p>TiO<sub>2</sub> nanotubes rich in oxygen vacancies (Ov), which were successfully fabricated on Ti foils, were used as the working electrode of a photoelectrochemical (PEC) sensor. The TiO<sub>2</sub> nanotube electrode optimized with abundant Ov demonstrated a remarkable photocurrent density of 1.03&#xa0;mA/cm<sup>2</sup>, which is approximately 2.9 times higher than that of the TiO<sub>2</sub> nanotube electrode. When applied&#xa0;to&#xa0;the detection of DOC, this electrode exhibited a wide linear detection range spanning from 0.1 to 100&#xa0;μM and achieved an exceptionally low detection limit of 0.043&#xa0;μM with a signal-to-noise ratio of 3. Furthermore, comparative experiments indicated that the Ov-enriched TiO<sub>2</sub> nanotube electrode exhibited excellent anti-interference capabilities and long-term stability, ensuring the accuracy and reliability of the detection outcomes. The superior detection performance is primarily attributed to two aspects: on one hand, Ov act as electron traps, facilitating the capture and transfer of photogenerated electrons, effectively prolonging the lifetime of these carriers; on the other hand, Ov also serves as active sites, enhancing the adsorption of DOC molecules and reaction kinetics, further amplifying the detection signal. This work offers a theoretical and experimental groundwork for the rapid monitoring of residual antibiotics.</p> Graphical abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Ultrasensitive detection of doxycycline enabled by oxygen vacancy modulated TiO2 nanotubes

  • 期刊论文

  • 发表日期：

    2025年3月7日

查看全文
  • Juan Gao,
  • Sen Yang,
  • Chen Xu,
  • Zerui Dong,
  • SiZhu Chen,
  • Lingcheng Zheng,
  • Leilei Lan,
  • Gang He

摘要

TiO2 nanotubes rich in oxygen vacancies (Ov), which were successfully fabricated on Ti foils, were used as the working electrode of a photoelectrochemical (PEC) sensor. The TiO2 nanotube electrode optimized with abundant Ov demonstrated a remarkable photocurrent density of 1.03 mA/cm2, which is approximately 2.9 times higher than that of the TiO2 nanotube electrode. When applied to the detection of DOC, this electrode exhibited a wide linear detection range spanning from 0.1 to 100 μM and achieved an exceptionally low detection limit of 0.043 μM with a signal-to-noise ratio of 3. Furthermore, comparative experiments indicated that the Ov-enriched TiO2 nanotube electrode exhibited excellent anti-interference capabilities and long-term stability, ensuring the accuracy and reliability of the detection outcomes. The superior detection performance is primarily attributed to two aspects: on one hand, Ov act as electron traps, facilitating the capture and transfer of photogenerated electrons, effectively prolonging the lifetime of these carriers; on the other hand, Ov also serves as active sites, enhancing the adsorption of DOC molecules and reaction kinetics, further amplifying the detection signal. This work offers a theoretical and experimental groundwork for the rapid monitoring of residual antibiotics.

Graphical abstract