Influence of NaNbO3 morphology and particle size on hydrogen production via heterogeneous photocatalysis

IF 4.2 Q2 CHEMISTRY, MULTIDISCIPLINARY

Results in Chemistry Pub Date : 2025-09-20 DOI:10.1016/j.rechem.2025.102731

Fabrício Vieira de Andrade , Giovanna Machado , Leonardo José Lins Maciel , Guilherme Oliveira Siqueira , Matheus Araújo Pereira , Felipe L.N. Sousa , Victor de Alvarenga Oliveira

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Abstract

Sodium niobate (NaNbO₃) was synthesized via microwave-assisted hydrothermal and Pechini polymer precursor resulting in materials with different particle sizes and morphologies. Both synthesized materials were evaluated as photocatalysts for hydrogen production from water under simulated solar irradiation, using glycerol as a hole scavenger. The results demonstrated a strong correlation between photocatalytic performance and material morphology, with the Pechini-derived NaNbO₃ exhibiting significantly higher hydrogen evolution rates. This superior performance was attributed to its nanostructured morphology, which provides a larger specific surface area and an increased number of active sites for photocatalytic reaction. These findings highlight the importance of tailoring synthesis routes to optimize the structural and textural properties of NaNbO₃ for efficient hydrogen generation.

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纳米bo3形貌和粒径对非均相光催化制氢的影响

采用微波辅助水热法和Pechini聚合物前驱体合成了铌酸钠（NaNbO3），得到了不同粒径和形貌的材料。在模拟太阳照射下，以甘油为孔洞清除剂，评价了两种合成材料作为水制氢光催化剂的性能。结果表明，光催化性能与材料形态之间存在很强的相关性，pechini衍生的NaNbO3具有显著更高的析氢速率。这种优异的性能归功于其纳米结构的形态，它提供了更大的比表面积和更多的光催化反应活性位点。这些发现强调了定制合成路线的重要性，以优化NaNbO3的结构和纹理性质，以实现高效制氢。

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