Spatial Heterojunction in Nanostructured TiO2 and Its Cascade Effect for Efficient Photocatalysis

Yi Lu; Xiao Long Liu; Li He; Yue Xing Zhang; Zhi Yi Hu; Ge Tian; Xiu Cheng; Si Ming Wu; Yuan Zhou Li; Xiao Hang Yang; Li Ying Wang; Jia Wen Liu; Christoph Janiak; Gang Gang Chang; Wei Hua Li; Gustaaf Van Tendeloo; Xiao Yu Yang; Bao Lian Su

doi:10.1021/acs.nanolett.9b05121

Spatial Heterojunction in Nanostructured TiO₂ and Its Cascade Effect for Efficient Photocatalysis

Yi Lu, Xiao Long Liu, Li He, Yue Xing Zhang, Zhi Yi Hu, Ge Tian, Xiu Cheng, Si Ming Wu, Yuan Zhou Li, Xiao Hang Yang, Li Ying Wang, Jia Wen Liu, Christoph Janiak, Gang Gang Chang, Wei Hua Li, Gustaaf Van Tendeloo, Xiao Yu Yang, Bao Lian Su

University of Namur

Research output: Contribution to journal › Article › peer-review

Abstract

A highly efficient photoenergy conversion is strongly dependent on the cumulative cascade efficiency of the photogenerated carriers. Spatial heterojunctions are critical to directed charge transfer and, thus, attractive but still a challenge. Here, a spatially ternary titanium-defected TiO₂@carbon quantum dots@reduced graphene oxide (denoted as V_Ti@CQDs@rGO) in one system is shown to demonstrate a cascade effect of charges and significant performances regarding the photocurrent, the apparent quantum yield, and photocatalysis such as H₂ production from water splitting and CO₂ reduction. A key aspect in the construction is the technologically irrational junction of Ti-vacancies and nanocarbons for the spatially inside-out heterojunction. The new "spatial heterojunctions" concept, characteristics, mechanism, and extension are proposed at an atomic-/nanoscale to clarify the generation of rational heterojunctions as well as the cascade electron transfer.

Original language	English
Pages (from-to)	3122-3129
Number of pages	8
Journal	Nano Letters
Volume	20
Issue number	5
DOIs	https://doi.org/10.1021/acs.nanolett.9b05121
Publication status	Published - 13 May 2020

Keywords

carbon dioxide reduction
cascade effect
seawater splitting
spatial heterojunction
Ti-vacancy

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1021/acs.nanolett.9b05121

Cite this

Lu, Y., Liu, X. L., He, L., Zhang, Y. X., Hu, Z. Y., Tian, G., Cheng, X., Wu, S. M., Li, Y. Z., Yang, X. H., Wang, L. Y., Liu, J. W., Janiak, C., Chang, G. G., Li, W. H., Van Tendeloo, G., Yang, X. Y., & Su, B. L. (2020). Spatial Heterojunction in Nanostructured TiO₂ and Its Cascade Effect for Efficient Photocatalysis. Nano Letters, 20(5), 3122-3129. https://doi.org/10.1021/acs.nanolett.9b05121

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abstract = "A highly efficient photoenergy conversion is strongly dependent on the cumulative cascade efficiency of the photogenerated carriers. Spatial heterojunctions are critical to directed charge transfer and, thus, attractive but still a challenge. Here, a spatially ternary titanium-defected TiO2@carbon quantum dots@reduced graphene oxide (denoted as VTi@CQDs@rGO) in one system is shown to demonstrate a cascade effect of charges and significant performances regarding the photocurrent, the apparent quantum yield, and photocatalysis such as H2 production from water splitting and CO2 reduction. A key aspect in the construction is the technologically irrational junction of Ti-vacancies and nanocarbons for the spatially inside-out heterojunction. The new {"}spatial heterojunctions{"} concept, characteristics, mechanism, and extension are proposed at an atomic-/nanoscale to clarify the generation of rational heterojunctions as well as the cascade electron transfer.",

keywords = "carbon dioxide reduction, cascade effect, seawater splitting, spatial heterojunction, Ti-vacancy",

author = "Yi Lu and Liu, {Xiao Long} and Li He and Zhang, {Yue Xing} and Hu, {Zhi Yi} and Ge Tian and Xiu Cheng and Wu, {Si Ming} and Li, {Yuan Zhou} and Yang, {Xiao Hang} and Wang, {Li Ying} and Liu, {Jia Wen} and Christoph Janiak and Chang, {Gang Gang} and Li, {Wei Hua} and {Van Tendeloo}, Gustaaf and Yang, {Xiao Yu} and Su, {Bao Lian}",

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month = may,

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doi = "10.1021/acs.nanolett.9b05121",

language = "English",

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AU - Lu, Yi

AU - Liu, Xiao Long

AU - He, Li

AU - Zhang, Yue Xing

AU - Hu, Zhi Yi

AU - Tian, Ge

AU - Cheng, Xiu

AU - Wu, Si Ming

AU - Li, Yuan Zhou

AU - Yang, Xiao Hang

AU - Wang, Li Ying

AU - Liu, Jia Wen

AU - Janiak, Christoph

AU - Chang, Gang Gang

AU - Li, Wei Hua

AU - Van Tendeloo, Gustaaf

AU - Yang, Xiao Yu

AU - Su, Bao Lian

PY - 2020/5/13

Y1 - 2020/5/13

N2 - A highly efficient photoenergy conversion is strongly dependent on the cumulative cascade efficiency of the photogenerated carriers. Spatial heterojunctions are critical to directed charge transfer and, thus, attractive but still a challenge. Here, a spatially ternary titanium-defected TiO2@carbon quantum dots@reduced graphene oxide (denoted as VTi@CQDs@rGO) in one system is shown to demonstrate a cascade effect of charges and significant performances regarding the photocurrent, the apparent quantum yield, and photocatalysis such as H2 production from water splitting and CO2 reduction. A key aspect in the construction is the technologically irrational junction of Ti-vacancies and nanocarbons for the spatially inside-out heterojunction. The new "spatial heterojunctions" concept, characteristics, mechanism, and extension are proposed at an atomic-/nanoscale to clarify the generation of rational heterojunctions as well as the cascade electron transfer.

AB - A highly efficient photoenergy conversion is strongly dependent on the cumulative cascade efficiency of the photogenerated carriers. Spatial heterojunctions are critical to directed charge transfer and, thus, attractive but still a challenge. Here, a spatially ternary titanium-defected TiO2@carbon quantum dots@reduced graphene oxide (denoted as VTi@CQDs@rGO) in one system is shown to demonstrate a cascade effect of charges and significant performances regarding the photocurrent, the apparent quantum yield, and photocatalysis such as H2 production from water splitting and CO2 reduction. A key aspect in the construction is the technologically irrational junction of Ti-vacancies and nanocarbons for the spatially inside-out heterojunction. The new "spatial heterojunctions" concept, characteristics, mechanism, and extension are proposed at an atomic-/nanoscale to clarify the generation of rational heterojunctions as well as the cascade electron transfer.

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Spatial Heterojunction in Nanostructured TiO₂ and Its Cascade Effect for Efficient Photocatalysis

Abstract

Keywords

UN SDGs

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Physical Chemistry and characterization(PC2)

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Spatial Heterojunction in Nanostructured TiO2 and Its Cascade Effect for Efficient Photocatalysis

Abstract

Keywords

UN SDGs

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Fingerprint

Equipment

Physical Chemistry and characterization(PC2)

Cite this

Spatial Heterojunction in Nanostructured TiO₂ and Its Cascade Effect for Efficient Photocatalysis