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- 저자 : Quande Che (검색결과 3 건)
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Quande Che,Hongxing Yang,Lin Lu,Yuanhao Wang,Hai Wang 대한금속·재료학회 2013 ELECTRONIC MATERIALS LETTERS Vol.9 No.3
This paper reports a one-step synthesis of hybrid rod-like and spherical silver particles and its application in the silver front contact paste for crystalline silicon solar cells. The hybrid silver particles were synthesized by reducing silver nitrate in ethylene glycol. X-ray diffraction indicated that the hybrid silver particles were well crystallized with no crystallographic impurities. Scanning electron microscopy showed that the rod-like particles in the hybrid particles were 0.2 μm to 0.5 μm in width and 1 μm to 4 μm in length, and that the average size of the spherical particles was 0.5 μm. The fabricated crystalline silicon solar cell based on the as-prepared hybrid silver particles showed good photovoltaic performance.
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Tong Song,Xiao Zhang,Quande Che,Ping Yang 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.113 No.-
Novel g-C3N4/SnS2 van der Waals heterojunctions were fabricated via SnS2 crystals embedded superiorthin g-C3N4 nanosheets for efficient photocatalytic oxidation and reduction activities simultaneously. S-scheme charge migration path was confirmed through test and density functional theory (DFT) calculation. Two dimensional (2D)/2D interfaces, powerful internal electric field (IEF) and band bending effecttogether expedited charge transfer. Photocatalytic removal of organic pollutants and hydrogen evolutionwere employed to evaluate photocatalytic performance. Particularly, the g-C3N4/SnS2 heterojunctionsexhibited excellent 2,4-dichlorophenol (2,4-DCP) photooxidation and Cr(VI) photoreduction activitiesat the same time. 85% of Cr(VI) and 94% of 2,4-DCP were removed in the mixed solution after visible lightirradiation for 2 h (k > 420 nm). The hydrogen evolution rate enhanced to 6.58 times of g-C3N4. DFT simulationmatched with test for narrowed band gap and enhanced IEF (accelerating photogenerated carriertransfer). This work provided new insights for constructing S-scheme multifunctional g-C3N4-basedphotocatalyst.
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Enhanced carrier separation in g-C3N4/MoO3-x heterostructures towards efficient phenol removal
Tong Song,Cong Xie,Quande Che,Ping Yang 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.122 No.-
Two-dimensional (2D)/2D g-C3N4/MoO3-x heterojunctions were constructed for enhanced photocatalyticphenol removal. The oxygen vacancies in MoO3-x help to extend absorption in a full solar spectrum especiallyin near-infrared (NIR) region. Improved charge transfer path preserved photogenerated electronsand holes with powerful enough redox abilities, which simultaneously improved phenol photodegradationperformance and photocatalytic activation efficiency of peroxydisulfate (PDS). In full solar spectrumactivated PDS system, the phenol removal efficiency using g-C3N4/MoO3-x heterostructures reached 98%within 60 min. For the contribution of PDS activation process, active species trapping experiment and insituopen-circuit potentials (OCP) measurement indicated that radical and non-radical pathways jointlypromoted the elimination of phenol. The existence of oxygen vacancies promoted the formation ofcatalyst-PDS* complex and thus facilitated the electron transfer process, which exerted crucial effectas non-radical pathway. This result provided an ideal catalyst for photocatalytic persulfate activation systemin the field of environmental remediation.
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