Tuning Photo(electro)Catalytic Activity of Nano ZnO by Varying Current Density during Electrosynthesis

IF 0.9 4区工程技术 Q4 ELECTROCHEMISTRY

Russian Journal of Electrochemistry Pub Date : 2025-12-23 DOI:10.1134/S1023193525600762

T. A. Belichenko, D. A. Ponomarev, A. N. Yatsenko, L. N. Fesenko, N. V. Smirnova, A. A. Ulyankina

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Abstract

Zinc oxide (ZnO) remains a promising candidate in the field of photo(electro)catalytic hydrogen/electricity production from water/biomass and wastewater treatment. However, there has been a need for the development of sustainable, versatile tools for achieving controlled and economically viable production of nano ZnO. This research is aimed at assessing the electrochemical approaches to tune ZnO morphology through electrosynthesis using pulse alternating current (PAC) by varying the average anodic/cathodic current densities ratio (j_a : j_c) and NaCl electrolyte as one of the most naturally abundant compounds. The composition, morphology, and specific surface area (SSA) of the ZnO synthesized at different j_a : j_c were investigated using X-ray diffraction (XRD), transmission electron microscopy (TEM), and low-temperature nitrogen adsorption-desorption (BET) methods. The synthesized ZnO nanopowders were applied as photoelectrocatalytic (PEC) and photocatalytic (PC) materials. PEC performance of ZnO/FTO was investigated using Na₂SO₃, ethanol, glycerol, ethylene glycol, formic acid, and glucose as inorganic and organic oxygenates. The PC activity of nano ZnO was evaluated using 2,4-dinitrophenol (DNP) as an organic pollutant. The variation in PEC and PC performance depending on the ZnO electrosynthesis conditions was shown.

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电合成过程中改变电流密度调节纳米ZnO光（电）催化活性

氧化锌（ZnO）在水/生物质光（电）催化制氢/电和废水处理领域具有广阔的应用前景。然而，为了实现可控和经济可行的纳米ZnO生产，需要开发可持续的、通用的工具。本研究旨在评估利用脉冲交流电流（PAC）通过改变平均阳极/阴极电流密度比（ja: jc）和NaCl电解质作为最丰富的天然化合物之一，通过电合成来调整ZnO形貌的电化学方法。采用x射线衍射（XRD）、透射电镜（TEM）和低温氮吸附-脱附（BET）等方法研究了不同ja: jc合成的ZnO的组成、形貌和比表面积（SSA）。将合成的氧化锌纳米粉体应用于光催化（PEC）和光催化（PC）材料。以Na2SO3、乙醇、甘油、乙二醇、甲酸和葡萄糖为无机氧和有机氧，考察了ZnO/FTO的PEC性能。以2,4-二硝基苯酚（DNP）为有机污染物，对纳米ZnO的PC活性进行了评价。研究了ZnO电合成条件对PEC和PC性能的影响。

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来源期刊

Russian Journal of Electrochemistry 工程技术-电化学

CiteScore

1.90

自引率

8.30%

发文量

102

审稿时长

6 months

期刊介绍： Russian Journal of Electrochemistry is a journal that covers all aspects of research in modern electrochemistry. The journal welcomes submissions in English or Russian regardless of country and nationality of authors.