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Strongly Coupled Metal Oxide/Reassembled Carbon Nitride/Co-Pi Heterostructures for Efficient Photoelectrochemical Water Splitting
An, Xiaoqiang; Hu, Chengzhi; Lan, Huachun; Liu, Huijuan; Qu, Jiuhui
2018-02-21
Source PublicationACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
Volume10Issue:7Pages:6424-6432
AbstractThe photoelectrochemical application of carbon nitride is extremely exciting because of the meta-free components, low cost, nontoxicity, and appropriate band positions. To construct carbon nitride-based heterostructures, a conventional ultrasonic exfoliation method is usually used to fabricate dispersion of ultrathin nanosheets. However, the outstretched structure and the poor dispersity inevitably result in the poor interfacial contact between different materials. To solve this problem, hydrolyzed carbon nitride suspension was used as a homogeneous precursor for the fabrication of composite photoanodes. The in situ reassembly of onedimensional nanofibers resulted in the formation of uniform and ultrathin carbon nitride nanoarchitectures on the surface of Fe2O3 nanorod arrays. Because of the strongly coupled interfaces and the deposition of Co Pi water oxidation cocatalysts, the as synthesized heterostructured photoanodes exhibited three-fold increased photocurrent density and good stability, compared to pristine Fe2O3. The significantly improved photoactivity of the Fe2O3/reassembled carbon nitride/Co Pi heterostructures was ascribed to the decreased interfacial conductivity and facilitated charge separation. This material designing strategy was further used to construct TiO2/carbon nitride, ZnO/carbon nitride, and WO3/carbon nitride heterostructures. The incorporation of hydrolyzed carbon nitride could remarkably enhance the photoelectrochemical performance of these metal oxide photoanodes. Thus, this work provides a new paradigm for designing carbon nitride-based composite nanostructures for efficient and stable solar fuel production.
Department中国科学院饮用水科学与技术重点实验室
Keywordcarbon nitride photoelectrochemical water splitting metal oxides photoanodes
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/41415
Collection中国科学院饮用水科学与技术重点实验室
Recommended Citation
GB/T 7714
An, Xiaoqiang,Hu, Chengzhi,Lan, Huachun,et al. Strongly Coupled Metal Oxide/Reassembled Carbon Nitride/Co-Pi Heterostructures for Efficient Photoelectrochemical Water Splitting[J]. ACS APPLIED MATERIALS & INTERFACES,2018,10(7):6424-6432.
APA An, Xiaoqiang,Hu, Chengzhi,Lan, Huachun,Liu, Huijuan,&Qu, Jiuhui.(2018).Strongly Coupled Metal Oxide/Reassembled Carbon Nitride/Co-Pi Heterostructures for Efficient Photoelectrochemical Water Splitting.ACS APPLIED MATERIALS & INTERFACES,10(7),6424-6432.
MLA An, Xiaoqiang,et al."Strongly Coupled Metal Oxide/Reassembled Carbon Nitride/Co-Pi Heterostructures for Efficient Photoelectrochemical Water Splitting".ACS APPLIED MATERIALS & INTERFACES 10.7(2018):6424-6432.
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