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Oxygen-deficient photostable Cu2O for enhanced visible light photocatalytic activity†
Nanoscale ( IF 5.8 ) Pub Date : 2018-02-16 00:00:00 , DOI: 10.1039/c7nr08388b Mandeep Singh 1, 2, 3, 4, 5 , Deshetti Jampaiah 1, 2, 3, 4, 5 , Ahmad E. Kandjani 3, 4, 5, 6, 7 , Ylias M. Sabri 3, 4, 5, 6, 7 , Enrico Della Gaspera 3, 4, 5, 7 , Philipp Reineck 3, 4, 5, 7, 8 , Martyna Judd 7, 9, 10, 11 , Julien Langley 7, 9, 10, 11 , Nicholas Cox 7, 9, 10, 11 , Joel van Embden 3, 4, 5, 7 , Edwin L. H. Mayes 4, 5, 7, 12 , Brant C. Gibson 3, 4, 5, 7, 8 , Suresh K. Bhargava 3, 4, 5, 6, 7 , Rajesh Ramanathan 1, 2, 3, 4, 5 , Vipul Bansal 1, 2, 3, 4, 5
Nanoscale ( IF 5.8 ) Pub Date : 2018-02-16 00:00:00 , DOI: 10.1039/c7nr08388b Mandeep Singh 1, 2, 3, 4, 5 , Deshetti Jampaiah 1, 2, 3, 4, 5 , Ahmad E. Kandjani 3, 4, 5, 6, 7 , Ylias M. Sabri 3, 4, 5, 6, 7 , Enrico Della Gaspera 3, 4, 5, 7 , Philipp Reineck 3, 4, 5, 7, 8 , Martyna Judd 7, 9, 10, 11 , Julien Langley 7, 9, 10, 11 , Nicholas Cox 7, 9, 10, 11 , Joel van Embden 3, 4, 5, 7 , Edwin L. H. Mayes 4, 5, 7, 12 , Brant C. Gibson 3, 4, 5, 7, 8 , Suresh K. Bhargava 3, 4, 5, 6, 7 , Rajesh Ramanathan 1, 2, 3, 4, 5 , Vipul Bansal 1, 2, 3, 4, 5
Affiliation
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Oxygen vacancies in inorganic semiconductors play an important role in reducing electron–hole recombination, which may have important implications in photocatalysis. Cuprous oxide (Cu2O), a visible light active p-type semiconductor, is a promising photocatalyst. However, the synthesis of photostable Cu2O enriched with oxygen defects remains a challenge. We report a simple method for the gram-scale synthesis of highly photostable Cu2O nanoparticles by the hydrolysis of a Cu(I)-triethylamine [Cu(I)–TEA] complex at low temperature. The oxygen vacancies in these Cu2O nanoparticles led to a significant increase in the lifetimes of photogenerated charge carriers upon excitation with visible light. This, in combination with a suitable energy band structure, allowed Cu2O nanoparticles to exhibit outstanding photoactivity in visible light through the generation of electron-mediated hydroxyl (OH˙) radicals. This study highlights the significance of oxygen defects in enhancing the photocatalytic performance of promising semiconductor photocatalysts.
中文翻译：
缺氧光稳定的Cu 2 O可增强可见光的光催化活性†
无机半导体中的氧空位在减少电子-空穴复合中起着重要作用，这可能对光催化具有重要意义。可见光活性p型半导体氧化亚铜（Cu 2 O）是一种有前途的光催化剂。然而，富含氧缺陷的光稳定Cu 2 O的合成仍然是一个挑战。我们报告了一种通过在低温下水解Cu（I）-三乙胺[Cu（I）-TEA]络合物水解高光稳定性Cu 2 O纳米颗粒的克级合成的简单方法。这些Cu 2中的氧空位在可见光激发下，O纳米颗粒导致光生载流子的寿命显着增加。结合合适的能带结构，这使得Cu 2 O纳米粒子通过产生电子介导的羟基（OH +）自由基而在可见光下表现出出色的光活性。这项研究强调了氧缺陷在增强有前途的半导体光催化剂的光催化性能方面的重要性。
更新日期：2018-02-16
中文翻译：
缺氧光稳定的Cu 2 O可增强可见光的光催化活性†
无机半导体中的氧空位在减少电子-空穴复合中起着重要作用，这可能对光催化具有重要意义。可见光活性p型半导体氧化亚铜（Cu 2 O）是一种有前途的光催化剂。然而，富含氧缺陷的光稳定Cu 2 O的合成仍然是一个挑战。我们报告了一种通过在低温下水解Cu（I）-三乙胺[Cu（I）-TEA]络合物水解高光稳定性Cu 2 O纳米颗粒的克级合成的简单方法。这些Cu 2中的氧空位在可见光激发下，O纳米颗粒导致光生载流子的寿命显着增加。结合合适的能带结构，这使得Cu 2 O纳米粒子通过产生电子介导的羟基（OH +）自由基而在可见光下表现出出色的光活性。这项研究强调了氧缺陷在增强有前途的半导体光催化剂的光催化性能方面的重要性。
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