Morphology Effect of Bismuth Vanadate on Electrochemical Sensing for the Detection of Paracetamol

Abstract

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 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.

Microwave-Assisted Synthesis of MoS2/BiVO4 Heterojunction for Photocatalytic Degradation of Tetracycline Hydrochloride

“…Moreover, it proved the successful preparation of MoS 2 /BiVO 4 [38]. The enhancement of the diffraction peak intensity of the (121) crystal plane in MB5 and MB7 was significantly greater than the other diffraction peaks, and this probably attributed to the addition of MoS 2 affected the crystal structure and the growth direction of BiVO 4 [39,40] The grain size can be calculated by the Debye-Scherrer equation [41] (Equation ( 1)),…”

In Situ Synthesis of a Bismuth Vanadate/Molybdenum Disulfide Composite: An Electrochemical Tool for 3-Nitro-l-Tyrosine Analysis

“…39 To surpass the sluggish response of monoclinic BiVO 4 with high rates of charge recombination, high operating temperature, long response time, and lower active surface area, tetragonal-phase BiVO 4 (∼2.9 eV) is of recent significance. 40,41 Liu et al 42 compared the electrochemical sensing ability of polymorphic phases of BiVO 4 . The study demonstrated that the tetragonal clavate BiVO 4 afforded the highest sensitivity and lowest detection limit.…”

“…Generally, because of the small bandgap (∼2.4 eV) and distortion of the Bi–O bond, monoclinic BiVO 4 is widely utilized for diverse applications. , However, the possibility of electron–hole recombination and poor surface adsorption results in reduced charge transfer, restricting its use in electrochemistry . To surpass the sluggish response of monoclinic BiVO 4 with high rates of charge recombination, high operating temperature, long response time, and lower active surface area, tetragonal-phase BiVO 4 (∼2.9 eV) is of recent significance. , Liu et al compared the electrochemical sensing ability of polymorphic phases of BiVO 4 . The study demonstrated that the tetragonal clavate BiVO 4 afforded the highest sensitivity and lowest detection limit.…”