Journal
NANOMATERIALS
Volume 12, Issue 7, Pages -Publisher
MDPI
DOI: 10.3390/nano12071173
Keywords
BiVO4; morphology control; electrochemical sensor; paracetamol
Categories
Funding
- National Science Foundation for Young Scientists of China [6210030074]
- National Natural Science Foundation of China [61975067]
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Morphology-control can enhance the electrocatalytic activity and selectivity by changing the surface atomic active sites. Clavate shaped BiVO4 demonstrated improved electrochemical sensing performance and is potentially useful as an electrochemical sensor.
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 BiVO4 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 BiVO4 exhibited the best electrochemical sensing performance for paracetamol with a linear response in the range of 0.5-100 mu mol and a low detection limit of 0.2 mu mol. The enhanced electrochemical detection of paracetamol by bismuth vanadate nanomaterials with controllable shapes indicates their potential for applications as electrochemical sensors.
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