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Semimetal bismuth mediated UV–vis-IR driven photo-thermocatalysis of Bi4O5I2 for carbon dioxide to chemical energy
Journal of CO2 Utilization ( IF 7.7 ) Pub Date : 2017-11-24 , DOI: 10.1016/j.jcou.2017.11.007
Yang Bai , Ping Yang , Pingquan Wang , Haiquan Xie , Haifeng Dang , Liqun Ye

Semimetal bismuth has attracted extensive interests, which were ascribed to the photo-thermal effect and co-catalyst properties. In this paper, Bi/Bi4O5I2 composites were synthesized through a molecular precursor hydrolytic process, and the sunlight induced semimetal Bi mediated photo-thermocatalysis of Bi4O5I2 for carbon dioxide to chemical energy was studied. When the optimal mole ratio of Bi: I was selected at 1.95:1, Bi/Bi4O5I2 displayed outstanding photo-thermocatalytic carbon dioxide to chemical energy (CO and CH4). Under simulate sunlight (UV–vis-IR) irradiation, the CO and CH4 generation over Bi/Bi4O5I2 enhanced to 40.02 μmol h−1 g−1, and 7.19 μmol h−1 g−1, respectively. The light to chemical energy (LTCE) conversion efficiency (80.2 × 10−6) was about 6.47 times than Bi4O5I2 (12.4 × 10−6), and 68.55 times than Bi4O5I2 without IR irradiation (1.17 × 10−6). The dramatically enhanced photo-thermocatalysis activity of Bi/Bi4O5I2 can be attributed to the co-catalyst and photo-thermal effect of Bi nanoparticles, which prohibiting the electron–hole recombination and accelerating light to thermal energy conversion, respectively. Furthermore, the enhanced photo-induced carrier separation rate and reaction system temperature of Bi/Bi4O5I2 was testified.



中文翻译:

半金属铋介导的UV-vis-IR驱动的Bi 4 O 5 I 2对二氧化碳转化为化学能的光热催化

半金属铋引起了广泛的兴趣,这归因于光热效应和助催化剂的性能。本文通过分子前驱体水解法合成了Bi / Bi 4 O 5 I 2复合材料,研究了太阳光诱导的半金属Bi介导的Bi 4 O 5 I 2对二氧化碳的光热催化转化为化学能的过程。当Bi:I的最佳摩尔比选择为1.95:1时,Bi / Bi 4 O 5 I 2显示出出色的光热催化二氧化碳与化学能(CO和CH 4)。在模拟阳光(UV-vis-IR)照射下,Bi / Bi 4 O 5 I 2上的CO和CH 4生成分别提高到40.02μmolh -1  g -1和7.19μmolh -1  g -1。光化学能(LTCE)转换效率(80.2×10 -6)是Bi 4 O 5 I 2(12.4×10 -6)的约6.47倍,是未进行IR照射的Bi 4 O 5 I 2的68.55倍。1.17×10 -6)。Bi / Bi 4 O 5 I 2的显着增强的光热催化活性可以归因于Bi纳米粒子的助催化剂和光热效应,这分别阻止了电子-空穴的重组并加速了光到热能的转化。此外,证明了Bi / Bi 4 O 5 I 2的提高的光诱导载流子分离速率和反应体系温度。

更新日期:2017-11-24
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