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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Highly-effective photocatalytic properties and interfacial transfer efficiencies of charge carriers for the novel Ag_2CO_3/AgX heterojunctions achieved by surface modification
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Highly-effective photocatalytic properties and interfacial transfer efficiencies of charge carriers for the novel Ag_2CO_3/AgX heterojunctions achieved by surface modification

机译：通过表面改性获得的新型Ag_2CO_3 / AgX异质结的电荷载体的高效光催化性能和界面转移效率

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摘要

Novel Ag_2CO_3/AgX heterojunctions are achieved from the surface modification of Ag_2CO_3 with AgX (X = Cl, Br and I) nanoparticles by a facile and efficient ion-exchange method, which distinctly enhances the degradation activity for typical RhB, MB, and MO dyes compared with Ag_2CO_3. The formation of the heterostructure is evidenced by XRD, SEM, EDS, XPS and UV-vis DRS analyses, which indicates the bonding interaction between Ag_2CO_3 and AgX reduces the potential transfer barrier of charge carriers on their interface and extends visible light harvesting at 480–640 nm. Photocurrent responses and PL spectra demonstrate the Ag_2CO_3/AgX heterojunctions can effectively separate electron–hole pairs and suppress their recombination. The dye sensitization effect indicates that the effective electronic injection from RhB to the heterojunction is in favor of improving the photocatalytic ability. The possible transferred and separated behavior of electron–hole pairs and photocatalytic mechanisms are illustrated in detail.
机译：新型Ag_2CO_3 / AgX异质结是通过便捷高效的离子交换方法，用AgX（X = Cl，Br和I）纳米粒子对Ag_2CO_3进行表面改性而获得的，该方法明显提高了典型RhB，MB和MO染料的降解活性。与Ag_2CO_3相比。 XRD，SEM，EDS，XPS和UV-vis DRS分析证明了异质结构的形成，这表明Ag_2CO_3和AgX之间的键合相互作用降低了电荷载流子在其界面上的潜在转移势垒，并扩展了在480- 640纳米光电流响应和PL光谱表明，Ag_2CO_3 / AgX异质结可以有效地分离电子-空穴对并抑制其重组。染料敏化作用表明，从RhB到异质结的有效电子注入有利于提高光催化能力。详细说明了电子-空穴对可能的转移和分离行为以及光催化机理。

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