Mo-doped BiVO4 and graphene nanocomposites with enhanced photoelectrochemical performance for aptasensing of streptomycin
Mo-doped BiVO4 and graphene nanocomposites with enhanced photoelectrochemical performance for aptasensing of streptomycin
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具有增强光电化学性能的 Mo 掺杂 BiVO4 和石墨烯纳米复合材料用于链霉素适体传感
DOI：
10.1016/j.carbon.2017.04.079
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发表时间：
2017-08
期刊：
影响因子：
10.9
通讯作者：
Jingdong Zhang
中科院分区：
文献类型：
--
作者：
Otieno Kevin Okoth;Kai Yan;Jingdong Zhang
本工作制备了Mo掺杂BiVO4(Mo-BiVO4)和石墨烯纳米复合材料，并探索其作为光活性材料来构建可见光驱动的光电化学生物传感器。光电化学测试表明，适量的石墨烯掺杂到Mo-BiVO4中，由于提高了电荷转移速率和对可见光的吸收，极大地提高了光电流响应。此外，纳米复合材料中的石墨烯通过π-π堆积作用对链霉素适配子的固定化起着至关重要的作用。在没有链霉素的情况下，由于适体的空间位阻，光电化学适配子表现出较弱的光响应。在链霉素与适配子特异性相互作用后，传感器对链霉素的光电流响应增强，这归因于光生空穴对链霉素分子的氧化。在最佳条件下，所设计的光电化学传感器对链霉素在0.1nM-100nM浓度范围内表现出线性光电流响应，检测下限(3S/N)为0.0481 nM。通过对商业兽药中链霉素的检测，成功地评价了PEC适体传感器的适用性。
In this work, Mo-doped BiVO4(Mo-BiVO4) and graphene nanocomposites were prepared and explored as photoactive material to construct a visible light-driven photoelectrochemical biosensor. The photoelectrochemical measurements indicated that suitable amount of graphene incorporated into Mo-BiVO4greatly promoted the photocurrent response, owing to improved charge transfer rate and enhanced absorption of visible light. Moreover, graphene in the nanocomposites played a crucial role in immobilization of streptomycin aptamer through π-π stacking interaction. In the absence of streptomycin, photoelectrochemical aptasensor exhibited a weak photoresponse due to steric hindrance from the aptamer. After specific interaction between streptomycin and the aptamer, the sensor exhibited an enhanced photocurrent response to streptomycin, attributed to the oxidation of streptomycin molecules by photogenerated holes. Under optimal conditions, the designed photoelectrochemical sensor exhibited a linear photocurrent response to streptomycin in the concentration range of 0.1–100 nM, with a detection limit (3S/N) of 0.0481 nM. The applicability of the PEC aptasensor was successfully assessed by measuring streptomycin in commercial veterinary drugs.
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影响因子：
6.2
作者：
Xiaofang Zhang;Yang Zhang;Hong Zhao;Yujian He;Xiangjun Li;Zhuo-bin Yuan
通讯作者：
Xiaofang Zhang;Yang Zhang;Hong Zhao;Yujian He;Xiangjun Li;Zhuo-bin Yuan
还原氧化石墨烯接枝圆柱形 W 掺杂 BiVO4 杂化物，具有增强的光催化应用性能
影响因子：
15.1
作者：
FanQi Zhou;YuLin Min;JinChen Fan;QunJie Xu
通讯作者：
QunJie Xu
由离散 g-C3N4 纳米岛装饰的单斜多孔 BiVO4 网络，具有可调覆盖范围，可实现高效光催化
影响因子：
13.3
作者：
Li, Changjiang;Wang, Shengping;Gong, Jinlong
通讯作者：
Gong, Jinlong
影响因子：
10.9
作者：
N. Yang;Xin Jiang
通讯作者：
N. Yang;Xin Jiang
影响因子：
5
作者：
A. Arabzadeh;A. Salimi;Maysam Ashrafi;S. Soltanian;P. Servati
通讯作者：
A. Arabzadeh;A. Salimi;Maysam Ashrafi;S. Soltanian;P. Servati