Liu Ying, Xu Xiaocui, Ma Churong, Zhao Feng, Chen Kai
Guangdong Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou 510632, China.
Nanomaterials (Basel). 2022 Apr 1;12(7):1173. doi: 10.3390/nano12071173.
Morphology-control, as a promising and effective strategy, is widely implemented to change surface atomic active sites and thus enhance the intrinsic electrocatalytic activity and selectivity. As a typical n-type semiconductor, a series of bismuth vanadate samples with tunable morphologies of clavate, fusiform, flowered, bulky, and nanoparticles were prepared to investigate the morphology effect. Among all the synthesized samples, the clavate shaped BiVO with high index facets of (112), (301), and (200) exhibited reduced extrinsic pseudocapacitance and enhanced redox response, which is beneficial for tackling the sluggish voltammetric response of the traditional nanoparticle on the electrode surface. Benefiting from the large surface-active area and favorable ion diffusion channels, the clavate shaped BiVO exhibited the best electrochemical sensing performance for paracetamol with a linear response in the range of 0.5-100 µmol and a low detection limit of 0.2 µmol. The enhanced electrochemical detection of paracetamol by bismuth vanadate nanomaterials with controllable shapes indicates their potential for applications as electrochemical sensors.
形态控制作为一种有前景的有效策略，被广泛应用于改变表面原子活性位点，从而提高本征电催化活性和选择性。作为典型的n型半导体，制备了一系列具有棒状、纺锤形、花状、块状和纳米颗粒等可调形态的钒酸铋样品，以研究形态效应。在所有合成样品中，具有(112)、(301)和(200)高指数晶面的棒状BiVO表现出降低的非本征赝电容和增强的氧化还原响应，这有利于解决传统纳米颗粒在电极表面缓慢的伏安响应问题。得益于大的表面活性面积和良好的离子扩散通道，棒状BiVO对扑热息痛表现出最佳的电化学传感性能，线性响应范围为0.5-100 μmol，检测限低至0.2 μmol。形状可控的钒酸铋纳米材料对扑热息痛的电化学检测增强，表明它们作为电化学传感器的应用潜力。
