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

Lu Y, Liu XL, He L, Zhang YX, Hu ZY, Tian G, Cheng X, Wu SM, Li YZ, Yang XH, Wang LY, Liu JW, Janiak C, Chang GG, Li WH, Van Tendeloo G, Yang XY, Su BL (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Nano Letters American Chemical Society

Book Volume: 20

Pages Range: 3122-3129

Journal Issue: 5

DOI: 10.1021/acs.nanolett.9b05121

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.

Involved external institutions

Wuhan University of Technology CN China (CN) Heinrich-Heine-Universität Düsseldorf DE Germany (DE) Sun Yat-Sen University CN China (CN) Jilin University (JLU) / 吉林大学 CN China (CN) Chinese Academy of Sciences (CAS) / 中国科学院 CN China (CN) Hubei University CN China (CN)

How to cite

APA:

Lu, Y., Liu, X.-L., He, L., Zhang, Y.-X., Hu, Z.-Y., Tian, G.,... 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

MLA:

Lu, Yi, et al. "Spatial Heterojunction in Nanostructured TiO2 and Its Cascade Effect for Efficient Photocatalysis." Nano Letters 20.5 (2020): 3122-3129.

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