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Physicochemical properties of surface modified ZnFe2O4 nanocomposite incorporated with bio-templated kapok fiber for photoelectrochemical application
Surface and Interface Analysis ( IF 1.7 ) Pub Date : 2021-04-22 , DOI: 10.1002/sia.6950
Mohd Faizal Md Nasir 1, 2, 3 , Wan Ramli Wan Daud 3, 4 , Mohamad Hafiz Mamat 2, 5 , Saifollah Abdullah 1, 2 , Mohamad Rusop Mahmood 2, 5
Affiliation  

Surface-modified zinc ferrite nanocomposites were successfully prepared thru ultrasonic impregnation technique by taking kapok fiber as a bio-template. This work demonstrates a fast preparation method to produce the bio-templated ZnFe2O4 composite photocatalyst. The templating method for photocatalyst is favorable due to the benefit of a large surface area for solar harvesting activities in the photoelectrochemical (PEC) system. Comprehensive physicochemical analyses have successfully determined the unique properties of the prepared catalysts. The pure mimetic fibrous catalysts were successfully fabricated as photoelectrodes on the fluorine tin oxide substrate using electrophoretic deposition technique for PEC measurement. The ranging ratio of precursors used to prepare bio-templated zinc ferrite catalysts shows an effect on their surface structure then influences the photocurrent density performance of PEC analysis. The ZF1 photoanode at 1:1 Zn/Fe ratio has generated the highest photocurrent density of 58 μA cm−2 at 0.7 V vs. Ag/AgCl compare to other samples in 0.5 M Na2SO4 electrolyte solution under 100 mW cm−2 light irradiation. The high photocurrent density was attributed to the enhancement in light-harvesting properties, fine surface structure, and high charge transfer properties that correlate with the composite ratio's alteration. The bio-templated zinc ferrite photocatalysts are a promising photoanode in PEC activities.

中文翻译:

表面改性ZnFe2O4纳米复合材料与生物模板化木棉纤维的物理化学性质用于光电化学应用

以木棉纤维为生物模板,通过超声浸渍技术成功制备了表面改性铁酸锌纳米复合材料。这项工作展示了一种快速制备生物模板化 ZnFe 2 O 4 的方法复合光触媒。由于光电化学 (PEC) 系统中太阳能收集活动的表面积大,因此光催化剂的模板方法是有利的。综合理化分析已成功确定所制备催化剂的独特性能。使用电泳沉积技术在 PEC 测量中成功地将纯模拟纤维催化剂制备为氟氧化锡基底上的光电极。用于制备生物模板化铁酸锌催化剂的前体的范围比对其表面结构有影响,进而影响 PEC 分析的光电流密度性能。Zn/Fe 比为 1:1 的 ZF1 光阳极产生了最高的光电流密度 58 μA cm -2在 0.7 V vs. Ag/AgCl 与其他样品在 0.5 M Na 2 SO 4电解质溶液中在 100 mW cm -2光照射下进行比较。高光电流密度归因于与复合比改变相关的光捕获性能、精细表面结构和高电荷转移性能的增强。生物模板化锌铁氧体光催化剂是 PEC 活性中很有前途的光阳极。
更新日期:2021-06-04
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