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Effect of fluoride on the properties of spray-dried niobium-based composites: structure, porosity, particle size, morphology, and photoactivity
Chemical Engineering Communications ( IF 1.9 ) Pub Date : 2021-10-20 , DOI: 10.1080/00986445.2021.1993202
Nicolas Perciani de Moraes 1 , Rodrigo Barbosa Anselmo 1 , Rebeca Bacani 1 , Luís Otávio Sartor 1 , Liana Alvares Rodrigues 1 , Livia Chaguri 1
Affiliation  

Abstract

The development of simple and cost-effective photocatalytic materials in the treatment of effluents containing organic compounds is of extreme importance. This work evaluated the influence of fluoride ions on the synthesis of spray-dried Nb2O5/Carbon Xerogel composites. The material processed in the system with high fluoride concentration showed the presence of hexagonal NbO2F and Nb2O5 crystalline phases, whereas the material synthesized in lower fluoride concentration showed mainly the Nb2O5 phase. The higher content of the fluoride was detrimental to the adsorption capacity of the material and resulted in a significant reduction in the photocatalytic activity of spray-dried materials, probably due to the significant reduction in the specific surface area observed.



中文翻译:

氟化物对喷雾干燥铌基复合材料性能的影响:结构、孔隙率、粒径、形态和光活性

摘要

在处理含有机化合物的废水中,开发简单且具有成本效益的光催化材料极为重要。这项工作评估了氟离子对喷雾干燥 Nb 2 O 5 /碳干凝胶复合材料合成的影响。在高氟化物浓度体系中处理的材料显示存在六方NbO 2 F和Nb 2 O 5晶相,而在较低氟化物浓度下合成的材料主要显示Nb 2 O 5较高含量的氟化物不利于材料的吸附能力,并导致喷雾干燥材料的光催化活性显着降低,这可能是由于观察到的比表面积显着降低所致。

更新日期:2021-10-20
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