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Direct growth of nanostructural MoS2 over the h-BN nanoplatelets: An efficient heterostructure for visible light photoreduction of CO2 to methanol
Journal of CO2 Utilization ( IF 7.7 ) Pub Date : 2020-10-22 , DOI: 10.1016/j.jcou.2020.101345
Sangita Kumari , Rashi Gusain , Anurag Kumar , Nilesh Manwar , Suman L Jain , Om P Khatri

Photocatalytic conversion of CO2 has attracted immense attention as a clean and sustainable approach to produce chemicals and fuels. Several semiconductors and heterojunction-based photocatalysts have been explored for efficient conversion of CO2 into high-value chemicals and opened new opportunities for tailoring optoelectronic properties of 2D materials. In the present study, nanostructural molybdenum disulfide (MoS2) is grown over the hexagonal boron nitride (h-BN) nanoplatelets by a hydrothermal approach and prepared the h-BN-MoS2 heterostructure. The chemical, structural, morphological, and optical features of h-BN-MoS2 hybrid are evaluated using XPS, Raman, XRD, HRTEM, UV–vis, and PL analyses. The potential of h-BN-MoS2 hybrid as a photocatalyst is explored for photoreduction of CO2 under the visible light irradiation. Pristine h-BN and MoS2 nanomaterials are not pertinent for the photoreduction of CO2 as former is inactive and later afforded a low yield in comparison to h-BN-MoS2 hybrid under identical conditions. The effective charge separation in h-BN-MoS2 hybrid extended the life of photo-excited electrons and enhanced the photoreduction of CO2. The maximum yield of methanol using h-BN-MoS2 hybrid is found to be 5994 μmol.g−1cat, which is 3.8 folds higher than the pristine MoS2 under the visible light irradiation.



中文翻译:

h -BN纳米片上直接生长MoS 2纳米结构:一种有效的异质结构,用于将可见光光还原CO 2为甲醇

作为一种清洁,可持续的生产化学品和燃料的方法,CO 2的光催化转化引起了极大的关注。已经探索了几种半导体和基于异质结的光催化剂,以将CO 2有效地转化为高价值的化学物质,并为定制2D材料的光电特性提供了新的机会。在本研究中,通过水热法在六方氮化硼(h -BN)纳米片上生长纳米结构的二硫化钼(MoS 2),并制备了h -BN-MoS 2异质结构。h -BN-MoS 2的化学,结构,形态和光学特征使用XPS,拉曼,XRD,HRTEM,UV-vis和PL分析来评估杂交。探索了h -BN-MoS 2杂化物作为光催化剂在可见光照射下光还原CO 2的潜力。原始ħ -BN和MoS 2纳米材料不相关的CO的光还原2作为前者是不活动的和以后,得到低产率相比于ħ -BN-MOS 2相同的条件下混合。在h -BN-MoS 2杂化物中有效的电荷分离延长了受激电子的寿命并增强了CO 2的光还原。发现使用h -BN-MoS 2杂化物的甲醇的最大产率为5994μmol.g- 1猫,在可见光照射下比原始MoS 2高3.8倍。

更新日期:2020-10-30
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