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Ultrathin NiAl-Layered Double Hydroxides Grown on 2D Ti3C2Tx MXene to Construct Core–Shell Heterostructures for Enhanced Photocatalytic CO2 Reduction
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2021-05-07 , DOI: 10.1021/acs.jpcc.1c00017 Shuang Zhao 1 , Deng Pan 2 , Qian Liang 1 , Man Zhou 1 , Chao Yao 1 , Song Xu 1 , Zhongyu Li 1, 3
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2021-05-07 , DOI: 10.1021/acs.jpcc.1c00017 Shuang Zhao 1 , Deng Pan 2 , Qian Liang 1 , Man Zhou 1 , Chao Yao 1 , Song Xu 1 , Zhongyu Li 1, 3
Affiliation
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Photocatalytic CO2 reduction into renewable fuels by sustainable and clean solar energy can be considered as an ideal option to decrease the atmospheric CO2 level and fulfill the energy requirements. Layered double hydroxides (LDHs) with high surface area, tunable composition as well as exposed active sites have received enormous attention for photocatalytic CO2 reduction. Herein, a novel NiAl-LDH/Ti3C2Tx nanosheet (NiAl-LDH/TNS) with a core–shell structure was synthesized via an in situ hydrothermal method, and 2D NiAl-LDH coupled with the 2D Ti3C2Tx nanosheet to form a Schottky junction can suppress the back-diffusion of electrons and facilitate the transfer of charge carriers. Benefiting from the feature, the optimized sample with the additive Ti3C2Tx amount of 75 mg (NiAl-LDH/TNS-75) has the photocatalytic CO2 reduction conversion rate of CO (2128.46 μmol h–1 g–1) with the selectivity of CO (90.2%) under visible-light irradiation, which is about 8.6 times higher than that of pristine NiAl-LDH. This work provides a new insight into the construction of novel 2D semiconductor photocatalysts.
中文翻译：
在2D Ti 3 C 2 T x MXene上生长的超薄NiAl层状双金属氢氧化物，构建核-壳异质结构以增强CO 2的光催化还原
可持续和清洁的太阳能将光催化将CO 2还原为可再生燃料可被视为降低大气中CO 2含量并满足能源需求的理想选择。具有高表面积，可调整的组成以及暴露的活性位点的层状双氢氧化物（LDH）在光催化还原CO 2方面引起了极大的关注。本文中，通过原位水热法合成了具有核-壳结构的新型NiAl-LDH / Ti 3 C 2 T x纳米片（NiAl-LDH / TNS），并将二维NiAl-LDH与二维Ti 3 C 2偶联。Ť X形成肖特基结的纳米片可以抑制电子的反向扩散并促进电荷载流子的转移。得益于此功能，添加了Ti 3 C 2 T x量为75 mg（NiAl-LDH / TNS-75）的优化样品具有CO的光催化CO 2还原转化率（2128.46μmolh –1 g –1）。在可见光照射下，CO的选择性为90.2％，是原始NiAl-LDH的8.6倍左右。这项工作为新型2D半导体光催化剂的构建提供了新的见解。
更新日期：2021-05-20
中文翻译：
在2D Ti 3 C 2 T x MXene上生长的超薄NiAl层状双金属氢氧化物，构建核-壳异质结构以增强CO 2的光催化还原
可持续和清洁的太阳能将光催化将CO 2还原为可再生燃料可被视为降低大气中CO 2含量并满足能源需求的理想选择。具有高表面积，可调整的组成以及暴露的活性位点的层状双氢氧化物（LDH）在光催化还原CO 2方面引起了极大的关注。本文中，通过原位水热法合成了具有核-壳结构的新型NiAl-LDH / Ti 3 C 2 T x纳米片（NiAl-LDH / TNS），并将二维NiAl-LDH与二维Ti 3 C 2偶联。Ť X形成肖特基结的纳米片可以抑制电子的反向扩散并促进电荷载流子的转移。得益于此功能，添加了Ti 3 C 2 T x量为75 mg（NiAl-LDH / TNS-75）的优化样品具有CO的光催化CO 2还原转化率（2128.46μmolh –1 g –1）。在可见光照射下，CO的选择性为90.2％，是原始NiAl-LDH的8.6倍左右。这项工作为新型2D半导体光催化剂的构建提供了新的见解。
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