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碳氧化纤维素衍生碳介导的花样木氧合物,可在可见光下有效降低Cr(VI)

Biyao Fang¹, Jianhao Qiu², Guanglu Xia¹

¹Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China.

Journal of colloid and interface science

|September 6, 2024

概括

使用纤维素衍生碳 (CDC) 合成的花样木氧化物 (BiOX) 光催化剂显示出增强的活性. 这种形态增加了表面积和多孔度,显著改善了可见光光催化剂的Cr (VI) 减少.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
环境化学环境化学

背景情况:

定制光催化剂形态对于增强活性至关重要.
氧化物 (BiOX) 是有前途的光催化剂,但通常面积和效率有限.
来自生物质的碳材料为复合光催化剂设计提供了独特的特性.

研究的目的:

开发一种简单的方法,利用碳氧化纤维素衍生碳 (CDC) 将木氧化物 (BiOX) 形态转化为类似花朵的结构.
为了研究这种形态转变对表面积,多孔性和光催化性能的影响.
评估由此产生的BIOX/CDC复合材料在可见光下降低Cr (VI) 的效率.

主要方法:

BiOX (X = Br,I,Cl) 的形态转化,使用碳氧化纤维素衍生碳 (CDC) 作为模板.
合成的BIOX/CDC复合材料的表征,重点是表面积和孔隙度的测量.
在可见光照射下对BiOX/CDC复合材料进行光催化评价,以检测可见光照射下的Cr (VI) 减少.

主要成果:

与花样BiOX/CDC复合材料成功合成,与纯BiOX相比,其表面积和孔隙性显著增加.
在30分钟内,BiOBr/CDC表现出了98%的显著的Cr(VI) 减少效率,远远超过纯BiOBr (6%) 的效率.
与纯相对应物相比,BIOI/CDC和BIOCl/CDC也显示了增强的光催化活性 (分别为89%和69%).

结论:

使用CDC有效诱导形成类似花朵的BiOX形态,从而提高光催化性能.
与CDC增加的表面积,多孔性和协同效应有助于改善BiOX/CDC复合材料的可见光活性.
这项研究提出了一种新且高效的方法,用于设计使用生物质衍生碳材料的高性能光催化剂.

关键词:

木氧化的氧化.纤维素衍生的碳来自纤维素.光催化作用的光催化

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