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采用水为溶剂,Bi(NO_3)_3?5H_2O为Bi源,C_6H_5Na_3O_7?2H_2O(TCD)为配体构筑了前驱配合物Bi-TCD,通过配合物分解实现了由纳米片自组装的碳酸氧铋(BS)微米绒球的绿色可控合成,例如,BS的结构和形貌可经由改变反应物浓度和反应时间来调控。我们发现,一方面,TCD的配位作用可致BiO~+离子缓慢释出从而调控BS的形成速率;另一方面,尿素在BS材料的形成过程中起碳源、碱源、形貌调控剂和晶体成长控制剂的多重作用,通过调控尿素的浓度制备了三种分别沿着[001]、[110]和[013]优势生长方向的BS晶体。这种合成方法成本低,不需要有机溶剂、模板、表面活性剂、高温和很长的反应时间;产物分散性好;产率高;且拥有可控的形貌和优势生长方向。特别是由纳米片自组装的BS微米绒球对罗丹明B展现出优异的光催化性能。我们相信当前工作将是绿色可控合成和无机微纳材料应用方面的一个重要进展。
Bi-TCD, a precursor complex of C_6H_5Na_3O_7-2H_2O (TCD), was prepared by using water as solvent, Bi (NO_3) _3-5H_2O as bi source, BS) The green controllable synthesis of micropulveon, for example, the structure and morphology of BS can be controlled by changing the reactant concentration and reaction time. We found that, on the one hand, coordination of TCD can cause the slow release of BiO ~ + ions to regulate the formation rate of BS; on the other hand, urea plays a role of carbon source, alkali source and morphological regulator in the formation of BS material And crystal growth control agents, three kinds of BS crystals along the dominant growth direction of [001], [110] and [013] were prepared by controlling the concentration of urea. This method of synthesis is low cost, does not require organic solvents, templates, surfactants, high temperature and long reaction time; good product dispersion; high yield; and has a controlled morphology and dominant growth direction. In particular, self-assembled nanosheets of BS micromepulsions showed excellent photocatalytic activity toward rhodamine B. We believe the current work will be an important advance in the applications of green controlled synthesis and inorganic micro / nano materials.