Abstract
It is a challenging issue to further drive charge separation through the oriented design of Z-scheme het-erojunction in the exploitation of cost-effective photocatalytic materials.In this contribution,the unique Z-scheme 3D/2D In2Se3/PCN heterojunction is developed through implanting In2Se3 microspheres on PCN nanosheets using an in situ growth technique,which acquires the effective CO generation activity from photocatalytic CO2 reduction(CO2R).The CO yield of 4 h in the CO2R reaction over the optimal In2Se3/PCN-15 sample reaches up to 11.40 and 2.41 times higher than that of individual PCN and In2Se3,respectively.Such greatly enhanced photocatalytic performance is primarily the improvement of photo-generated carrier separation efficiency.To be more specific,the formed built-in electric field is signifi-cantly intensified by producing the temperature difference potential between In2Se3 and PCN owing to the photothermoelectric effect of ln2Se3,which actuates the high-efficiency separation of photogenerated charge carriers along the Z-scheme transfer path in the ln2Se3/PCN heterojunction.The effective strat-egy of enhancing the built-in electric field to drive photogenerated charge separation proposed in this work opens up an innovative avenue to design Z-scheme heterojunction applied to high-efficiency pho-tocatalytic reactions,such as hydrogen generation from water splitting,CO2R,and degradation of organic pollutants.
基金项目
National Natural Science Foundation of China(52072153)
National Natural Science Foundation of China(62004143)
Key R&D Program of Hubei Province(2022BAA084)
Postdoctoral Science Foundation of China(2021M690023)
Graduate Research Innovation Program of Jiangsu Provincial(KYCX22_3694)
Graduate Research Innovation Program of Jiangsu Provincial(KYCX23_3649)
Zhenjiang Key R&D Programmes(SH2021021)
NETL
NSTL
万方数据