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首页> 外文期刊>Catalysis science & technology >Interfacially bonded CuCo2O4/TiO2 nanosheet heterostructures for boosting photocatalytic H-2 production
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Interfacially bonded CuCo2O4/TiO2 nanosheet heterostructures for boosting photocatalytic H-2 production

机译：界面粘结CuCo2O4 /二氧化钛nanosheet异质结构促进光催化2生产

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Constructing high-performance, economical and environmentally friendly photocatalysts remains a challenge for the efficient conversion of solar energy. In this work, CuCo2O4 nanoparticles modified on TiO2 nanosheets have been designed and fabricated via a facile hydrothermal method followed by an in situ calcination process. The resultant 10%-CuCo2O4/TiO2 heterostructure exhibited superior photocatalytic activity under full spectra. The H-2 generation rate can reach 4830 mu mol g(-1) h(-1) under 300 W Xe lamp irradiation, which is 32 times higher than that of pristine TiO2 and the highest fold increase of a binary TiO2-based non-noble system reported so far. Its apparent quantum yield (AQY) value can reach 11.5% at 365 nm. Furthermore, we demonstrate that there are chemical bonds formed at the interface between well-dispersed CuCo2O4 and TiO2 by XPS spectrometry and electronegativity theory, and the efficient separation of charge carriers due to the p-n junction adopting the interfacial Ti-O-Cu/Co bonds is crucial for the improved performance and photostability. This work develops possibilities to prepare feasible CuCo2O4-based heterostructures for energy conversion.
机译：构建高性能、经济环境友好的催化剂仍然是一个挑战太阳能的转换效率能量。在二氧化钛nanosheets修改设计通过温和的水热法和捏造其次是一个原位煅烧过程。结果10% -cuco2o4 /二氧化钛异质结构表现出优异的光催化活性完整的光谱。4830亩摩尔g (1) h(1)低于300 W氙灯辐照,32倍的原始二氧化钛和最高的成倍增加一个二进制TiO2-based非贵金属系统报道太远了。在365 nm达到11.5%。证明有化学键的形成之间的界面的说法CuCo2O4并通过XPS谱和二氧化钛电负性理论和有效电荷载体由于pn的分离结采用界面Ti-O-Cu / Co改进的性能和债券是至关重要的耐光性。准备可行CuCo2O4-based能量转换的异质结构。

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