Photoinduced phase-transition on CuO electrospun nanofibers over the TiO2 photosensitizer for enhancing non-enzymatic glucose-sensing performance
Photoinduced phase-transition on CuO electrospun nanofibers over the TiO2 photosensitizer for enhancing non-enzymatic glucose-sensing performance
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DOI：
10.1016/j.jallcom.2021.163409
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发表时间：
2022
影响因子：
6.2
通讯作者：
Shi-bin Hou;Na Lu;Yongan Zhu;Jiaming Zhang;Xinlong Zhang;Yiming Yan;Peng Zhang;Zhenyi Zhang
中科院分区：
文献类型：
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作者：
Shi-bin Hou;Na Lu;Yongan Zhu;Jiaming Zhang;Xinlong Zhang;Yiming Yan;Peng Zhang;Zhenyi Zhang
构建具有多价态和氧化还原对的金属氧化物基复合材料是提高非酶葡萄糖传感性能的有效策略。本文报道了一种温和有效的制备多价铜基氧化物复合纳米纤维（CuxO CNFs）的方法，即在CuO纳米纤维中引入TiO 2光敏剂，在紫外-可见光照射下，使CuO（Cu 2+）发生局域相转变，形成Cu 2 O（Cu+）。与TiO 2/CuO CNFs相比，所获得的TiO 2/Cu 2 O/CuO CNFs对葡萄糖传感（0-2 mM）的灵敏度可以提高1.12-1.31倍。增强的灵敏度依赖于原始TiO 2/CuO CNFs中的TiO 2-含量。引入5.0时。%当CuO与TiO 2的组分比为0.46：1时，光致相变过程可形成最佳的TiO 2/Cu 2 O/CuO纳米纤维。与纯CuO电纺纳米纤维（1581 µA·mM−1·cm−2; 0.75 µM）的相应值相比，该TiO 2/Cu 2 O/CuO CNFs（2074.7 µA·mM−1·cm−2; 0.25 µ M）显示出接近1.32倍的灵敏度提高和3.0倍的检测限提高。经过14天的连续测量，优化后的样品的灵敏度可以保持其初始值的89.4%。紫外可见光照射1h后，其灵敏度可进一步恢复到初始值的97.4%。
Constructing metal-oxide-based composites with the multiple valence-states and redox-couples has been proved as an effective strategy to enhance the performance of non-enzymatic glucose sensing. Herein, we report a mild and efficient method to prepare multiple-valent copper-based oxide composite nanofibers (CuxO CNFs) through introducing the TiO2photosensitizer into the CuO NFs for actuating the localized phase transition from tenorite CuO (Cu2+) to cuprite Cu2O (Cu+) upon UV–visible light irradiation. The sensitivity of the obtained TiO2/Cu2O/CuO CNFs for glucose sensing (0–2 mM) could be enhanced by 1.12–1.31 times as compared to that of the TiO2/CuO CNFs. The enhanced sensitivity is dependent on the TiO2-content in the primal TiO2/CuO CNFs. When introducing 5.0 at.% of TiO2into the CuO nanofibers, the photoinduced phase-transition process could result in the formation of optimal TiO2/Cu2O/CuO CNFs with the component ratio of Cu2O to CuO at 0.46:1. This TiO2/Cu2O/CuO CNFs (2074.7 µA·mM−1·cm−2; 0.25 µM) exhibited nearly 1.32-fold improvement on the sensitivity and 3.0-fold enhancement on the detection limit as compared to the corresponding values of the pure CuO electrospun nanofibers (1581 µA·mM−1·cm−2; 0.75 µM). After the continuous measurements for 14 days, the sensitivity of the optimal sample could maintain 89.4% of its initial value. Notably, its sensitivity could be further recovered to 97.4% of the initial value after UV–visible light irradiation for 1 h.