Jiaqi Pan

The visible light hydrogen production of the Z-Scheme Ag 3 PO 4 /Ag/g-C 3 N 4 nanosheets composites

The Z-Scheme Ag3PO4/Ag/g-C3N4 nanosheets composites are synthesised via simple annealing and anion-exchange precipitation method. The obtained samples are characterized by SEM, XRD, TEM, XPS, UV–Vis and PL, which imply that the Z-Scheme Ag3PO4/Ag/g-C3N4 structure has been prepared successfully. The photocatalytic activity of the as-prepared Ag3PO4/Ag/g-C3N4 nanosheets composites displays a remarkable enhancement after the Ag3PO4/Ag nanoparticles being introduced by the hydrogen production under visible light. Further, the Z-Scheme structure of the sample and the lamellar structure of the C3N4 are considered as the main reasons for the enhancement.

The visible light photocatalytic activity enhancement of cotton cellulose nanofibers/In2S3/Ag–CdS nanocomposites

Cotton cellulose nanofibers (CCNFs)/In2S3/Ag–CdS nanocomposites were prepared by a typical technical route which combined electrospinning and a chemical method. The results showed that the CCNFs/In2S3/Ag–CdS nanocomposites had a remarkable visible light photocatalytic property and cycling stability, which displayed a significant enhancement compared with that of pure In2S3. Through analysis, this enhancement could be mainly attributed to the multilevel structure of the composites.

p–n junction induced electron injection type transparent photosensitive film of Cu2O/carbon quantum dots/ZnO

An electron injection type transparent photosensitive Cu2O/carbon quantum dot (C QD)/ZnO p-n junction film was prepared by a simple route in which, successively, the ZnO film was prepared by a sputtering process, the C QDs and Cu2O were prepared by hydrothermal synthetic and chemical methods, then the C QDs and Cu2O were introduced onto the surface of the ZnO film. The results indicated that the C QDs and Cu2O were well combined with the ZnO film. The transparency and photosensitivity of this film were investigated, and exhibited an obvious photosensitive enhancement compared with those of the unmodified film. Through analysis, this enhancement of the photoconductivity could be attributed to the remarkable Cu2O/ZnO p-n junction and C QDs with unique up-converted photoluminescence.

The cotton cellulose nanofibers framework of Z-Scheme ZnO/Ag 3 PO 4 heterojunction for visible-light photocatalysis

The cotton cellulose nanofibers framework of Z-Scheme ZnO/Ag3PO4 heterojunction has been successfully fabricated by a simple route of the electrospun-hydrothermal method. The photocatalytic activity of the as-prepared cotton cellulose nanofibers framework of Z-Scheme ZnO/Ag3PO4 heterojunction exhibits significant enhancement after the Ag3PO4 being introduced by the degradation of methylene blue (MB) under visible light irradiation. Furthermore, the high dispersibility of the CCNFs, high visible light absorption and photon-generated carriers separation of Z-Scheme ZnO/Ag3PO4 heterostructure are considered as the main reasons for the enhancement.

Ag-decorated octahedral K2Nb2O6 nanoparticles with enhanced photocatalytic performance

The Ag-K2Nb2O6 nanocomposites are synthesized by a two-step method where the octahedral K2Nb2O6 is initially prepared by solvothermal reaction and then the Ag particles are anchored onto the surface of K2Nb2O6 through the photoreduction of AgNO3. The XRD, SEM, TEM, XPS, DRS are applied to characterize the structure, morphology and optical properties, which confirm that the Ag particles are successfully deposited on the surface of K2Nb2O6. Compared with the pure K2Nb2O6, the Ag modified K2Nb2O6 catalysts show an obvious enhancement catalysis under UV–Vis light, because that could efficiently promote the light absorption and the separation of photoelectrons and holes.

The carbon quantum dots modified ZnO/TiO 2 nanotube heterojunction and its visible light photocatalysis enhancement

The carbon quantum dots modified ZnO/TiO2 nanotube heterojunction is synthesized via simple electrospinning–hydrothermal method. The results of SEM, XRD, TEM, FT-IR and XPS imply that the C QDs and ZnO nanoparticles have deposited on the surfaces of the TiO2 nanotubes successfully. Compared with the unmodified samples, the photocatalytic performance of the as-prepared C QDs modified ZnO/TiO2 nanotube heterojunction exhibits a remarkable enhancement by the degradation of Rhodamine B (RhB) under the visible light. Further, the up-conversion fluorescence of the C QDs, the heterojunction of the ZnO/TiO2 and the tubular structure of the TiO2 are considered as the main reasons for the enhancement.

Photoelectric conversion enhancement of Ag modified p-type Cu2O/n-type ZnO transparent heterojunction device

The Ag modified transparent Cu2O/ZnO p–n junction films were prepared by a simple magnetron sputtering process. The transparence and photoelectric conversion of these devices were investigated, which exhibited an obvious photoelectric conversion enhancement (PCE of 0.48%, ten times) than those of the unmodified heterojunction. Through analysis, the enhancement of the photoelectric conversion could be attributed to the remarkable Cu2O/ZnO p–n junction and Ag0 nanoparticles with the performances of photoelectron donor and surface enhanced plasmonic absorption.

One-step electrospinning route of SrTiO3-modified Rutile TiO2nanofibers and its photocatalytic properties

The SrTiO3 modified rutile TiO2 composite nanofibers were synthesized by a simple electrospinning technique. The result of XRD, SEM and TEM indicate that the SrTiO3/TiO2 heterojuction has been prepared successfully. Compared with the TiO2 and SrTiO3, the photocatalytic activity of the SrTiO3/TiO2 (rutile) for the degradation of methyl orange exhibits an obvious enhancement under UV illumination. which is almost 2 times than that of bare TiO2 (rutile) nanofiber. Further, the high crystallinity and photon-generated carrier separation of the SrTiO3/TiO2 heterojuction are considered as the main reason for this enhancement.

CdS modified Cu2O octahedral nano-heterojunction and its photocatalytic application

The p–n heterojunction of Cu2O/CdS have been prepared by a simple route of co-precipitation method. The results of SEM, TEM, XRD indicate that the surfaces of polyhedron Cu2O with different morphology are decorated by nanoparticle CdS. Compared with other structures under visible light, the Cu2O octahedra/CdS composites exhibit the highest photocatalytic property, which could be ascribed to that the unique heterojunction structure of the Cu2O/CdS could improve the photon-generated carrier separating and the Cu2O octahedral expose much more active surface than Cu2O cube.

The recyclable cotton cellulose nanofibers/ZnO/CuS nanocomposites with enhanced visible light photocatalytic activity

The cotton cellulose nanofibers(CCNFs)/ZnO/CuS nanocomposites have been successfully fabricated by the electrospun-hydrothermal method and successive ionic layer adsorption. The results of XRD, SEM and TEM indicate that the CuS are successfully combined with the ZnO. The photocatalytic activity of the CCNFs/ZnO/CuS nanocomposites is investigated by the degradation of methylene blue under visible light irradiation, and it is demonstrated to be significantly enhanced after the CuS is introduced. Furthermore, the direct interfacial charge transfer of the ZnO/CuS is considered as the main reason for the enhancement.