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Author

Ni Han

Bio: Ni Han is an academic researcher from Jiangsu University. The author has contributed to research in topics: Photocatalysis & Photodegradation. The author has an hindex of 2, co-authored 6 publications receiving 27 citations.

Papers
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Journal ArticleDOI
TL;DR: A two-step exfoliation-restacking process was employed to construct ultrathin Z-scheme two-dimensional (2D)/2D N-doped HTiNbO5 nanosheets/g-C3N4 (RTCN) heterojunction composites with the increased specific surface areas, showing the enhanced photocatalytic performance for rhodamine B (RhB) degradation and hydrogen generation under visible light irradiation.

53 citations

Journal ArticleDOI
TL;DR: In this article, a two-dimensional (2D)/2D porous layered Z-scheme heterojunction led to suppressed recombination and the efficient separation of photogenerated electron-hole pairs.

19 citations

Journal ArticleDOI
TL;DR: In this article, a highly potential visible light active g-C3N4/Bi4NbO8X (Cl, Br) heterojunction photocatalysts were constructed at the interface of the coupling between Bi4nbO 8X and g-c3n4, and pristine materials were analyzed to be 2.68 eV, 2.69 eV and 2.48 eV.

15 citations

Journal ArticleDOI
TL;DR: In this article, bismuth-based oxychloride photocatalysts such as BiOCl, Bi3O4Cl and Bi12O15Cl6 were prepared by a solvothermal (or hydrothermal) method with the controlled amount between Bi(NO3)3·5H2O and NH4Cl.

8 citations

Journal ArticleDOI
TL;DR: In this paper, ZnO@SiO2@Ag triple-layered core-shell nanocomposites were synthesized by a facile chemical precipitation route at 400°C using as-prepared samples as a precursor were investigated for photocatalytic application.
Abstract: Core-shell nanocomposites are promising materials in the degradation of harmful chemicals released from industries/factories. In this work, ZnO@SiO2@Ag triple–layered core-shell nanocomposites synthesized by a facile chemical precipitation route at 400 °C using as-prepared ZnO@SiO2 samples as a precursor were investigated for photocatalytic application. The synthesized ZnO@SiO2 and ZnO@SiO2@Ag samples were characterized using XRD, SEM, TEM, XPS, and UV-Vis spectrometer. The XRD studies showed that both nanocomposites possess the hexagonal wurtzite crystalline phase of the core ZnO. Moreover, the average crystallite sizes of ZnO@SiO2@Ag composites determined from the XRD spectra were found to be 27.98 nm and 30.56 nm for reaction times of 4 h and 12 h, respectively. The SEM and TEM analyses indicate that the morphologies of the samples were rod-shaped. The UV-Vis spectroscopy showed that the ZnO@SiO2@Ag nanoparticles exhibited maximum absorbance peak at 363 nm with a calculated band gap energy of 3.13 eV. In addition, the photocatalytic activity and stability were analyzed by a photoreduction method using the photodegradation property of organic methylene blue under UV-Vis light irradiation. Compared with the “bare” ZnO@SiO2 samples, the stability and photocatalytic performance of the Ag coated ZnO@SiO2@Ag nanocomposites were highly enhanced, and the reasons for the enhancement are discussed.

6 citations


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Journal ArticleDOI
TL;DR: A comprehensive, systematic and timely summary on the LBB-based materials applied in photocatalysis, which start with the classification, characteristics, and synthesis, is provided in this paper , where four types of LBB photocatalysts with different crystal structures are introduced.

53 citations

Journal ArticleDOI
TL;DR: In this article, a hierarchical erythroid-like BiVO4/hm-C4N3 direct Z-Scheme heterojunction is developed through elaborate template inducement and in-situ polymerization.
Abstract: Photocatalytic overall CO2 and H2O conversion has been very challenging. Herein, a hierarchical erythroid-like BiVO4/hm-C4N3 direct Z-Scheme heterojunction is developed through elaborate template inducement and in-situ polymerization. The superior CO2 capture, activation and charge deliver features are all integrated in reduction site of the Z-Scheme system. The overall photocatalytic CO2 and H2O conversion to CO and O2 are achieved without any sacrificial reagent and co-catalyst. In particular, the optimized BiVO4/hm-C4N3 presents a CO production rate of 40.8 μmol g−1 h−1 with a selectivity beyond 97 %. DFT calculation and in-situ DRIFTS spectra indicate that the dehydration of *COOH to CO is the rate-determining step. The supplement of proton by H2O oxidation from BiVO4 and the prolonged lifetime of electrons simultaneously contribute to the remarkable decreased reaction barrier. This work provides a new strategy to develop organic half-metal based photocatalyst, and may pave a new way to the target of artificial photosynthesis.

45 citations

Journal ArticleDOI
TL;DR: In this paper, the authors surveyed the recent advances in non-centrosymmetric (NCS) based photocatalytic materials, including piezoelectrics, pyroelectrics, ferro-electrics and nonlinear optical (NLO) materials, and highlighted the strategies towards improving polarization of NCS materials.

43 citations