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Protonated Branched Polyethyleneimine Induces the Shape Evolution of BiOCl and Exposed {010} Facet of BiOCl Nanosheets
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2018-07-26 00:00:00 , DOI: 10.1021/acs.cgd.8b00828 Zhaohui Wu 1 , Zhongfu Li 1 , Qingyong Tian 2, 3 , Jun Liu 3, 4 , Shumin Zhang 1 , Kaiqiang Xu 1 , Jie Shen 1 , Shiying Zhang 1 , Wei Wu 2, 3
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2018-07-26 00:00:00 , DOI: 10.1021/acs.cgd.8b00828 Zhaohui Wu 1 , Zhongfu Li 1 , Qingyong Tian 2, 3 , Jun Liu 3, 4 , Shumin Zhang 1 , Kaiqiang Xu 1 , Jie Shen 1 , Shiying Zhang 1 , Wei Wu 2, 3
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Protonated branched polyethyleneimine (BPEI) are employed to induce the shape evolution of BiOCl and facet exposure of BiOCl nanosheets through the interaction of protonated positive charges and negative charges stemmed from the {010} facet of BiOCl. During the synthesis process, vital factors including the concentration of protonated BPEI, protonated ability of BPEI caused by the concentration of chlorine ions (Cl–), and solvent for the shape and exposure facet of BiOCl are investigated detailly. The shape and phase of the resultant BiOCl is highly determined by the concentration of added BPEI. That is, when increasing the concentration of BPEI from 0 to 14.29 g/L, the shape of resulting products is evolved from three-dimensional (3D) assembled flowers to two-dimensional (2D) nanosheets. Especially, well-defined 2D BiOCl nanosheets with {010} exposed facets are obtained at a fixed concentration of BPEI (3.57 g/L). Furthermore, even fixing this concentration of BPEI, the protonated ability of BPEI is boosted by altering the concentration of Cl– sources and substitutive solvent of aqueous, resulting in increased concentration of vacancies on the surface of BiOCl (such as BiOCl-Cl3 and BiOCl-AQ) nanosheets. These BiOCl nanosheets with increased vacancies present dramatically enhanced photoreduction efficiency of Cr(VI) removal under simulated solar light irradiation. This work provides a valuable and facile route to design the adjustable shape and exposed facet of BiOCl nanosheets for photocatalysis.
中文翻译：
质子化的支化聚乙烯亚胺诱导BiOCl的形状演变和BiOCl纳米片的暴露{010}面
质子化的支化聚乙烯亚胺（BPEI）用于通过BiOCl的{010}刻面产生的质子化正电荷和负电荷的相互作用来诱导BiOCl的形状演变和BiOCl纳米片的刻面暴露。在合成过程中，至关重要的因素包括质子化BPEI的浓度，氯离子（Cl –），并详细研究了BiOCl的形状和暴露面的溶剂。所得BiOCl的形状和相高度取决于所添加BPEI的浓度。也就是说，当将BPEI的浓度从0增加到14.29 g / L时，所得产品的形状从三维（3D）组装花演变为二维（2D）纳米片。特别地，以固定浓度的BPEI（3.57 g / L）获得具有{010}暴露小平面的界限分明的二维BiOCl纳米片。此外，即使固定BPEI的该浓度，BPEI的质子化能力是通过改变的Cl浓度升压-源和水溶液替代溶剂，得到的BiOCl（如的BiOCl-CL的表面上的空位浓度的增加3和BiOCl-AQ）纳米片。这些具有增加的空位的BiOCl纳米片材在模拟的太阳光照射下显着提高了Cr（VI）去除的光还原效率。这项工作为设计BiOCl纳米片的可调节形状和裸露面提供了一条宝贵而又容易的途径，用于光催化。
更新日期：2018-07-26
中文翻译：
质子化的支化聚乙烯亚胺诱导BiOCl的形状演变和BiOCl纳米片的暴露{010}面
质子化的支化聚乙烯亚胺（BPEI）用于通过BiOCl的{010}刻面产生的质子化正电荷和负电荷的相互作用来诱导BiOCl的形状演变和BiOCl纳米片的刻面暴露。在合成过程中，至关重要的因素包括质子化BPEI的浓度，氯离子（Cl –），并详细研究了BiOCl的形状和暴露面的溶剂。所得BiOCl的形状和相高度取决于所添加BPEI的浓度。也就是说，当将BPEI的浓度从0增加到14.29 g / L时，所得产品的形状从三维（3D）组装花演变为二维（2D）纳米片。特别地，以固定浓度的BPEI（3.57 g / L）获得具有{010}暴露小平面的界限分明的二维BiOCl纳米片。此外，即使固定BPEI的该浓度，BPEI的质子化能力是通过改变的Cl浓度升压-源和水溶液替代溶剂，得到的BiOCl（如的BiOCl-CL的表面上的空位浓度的增加3和BiOCl-AQ）纳米片。这些具有增加的空位的BiOCl纳米片材在模拟的太阳光照射下显着提高了Cr（VI）去除的光还原效率。这项工作为设计BiOCl纳米片的可调节形状和裸露面提供了一条宝贵而又容易的途径，用于光催化。
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