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APPLIED SURFACE SCIENCE · 2010 ·Vol. 257 ·期 9 ·3920-3923 · IF 1.616

Hydrothermal synthesis of C-doped Zn3(OH)2V2O7 nanorods and their photocatalytic properties under visible light illumination

Hongxu Guo,Jianhua Chen,Wen Weng,Shunxing Li

A visible light-driven photocatalyst, C-doped Zn 3 (OH) 2 V 2 O 7 , prepared by a hydrothermal method was studied. The as-prepared catalyst was characterized by SEM, XRD , DRS, and XPS , and exhibited efficient photocatalytic activity in the degradation of methylene blue (MB) under visible-light irradiation. Besides decoloring, the decomposition of MB was also observed, further demonstrating the performance of the photocatalyst. The carbon existing on the surface of Zn 3 (OH) 2 V 2 O 7 nanorods was free and in carbide form. Dye degradation followed first-order kinetics, and was explained on the basis of the Langmuir–Hinshelwood mechanism.

研究领域: 材料化学 · 光催化 · 纳米材料 · 环境化学 · 无机合成

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JOURNAL OF POWER SOURCES · 2024 · IF 8.1

In-situ electrochemical conversion of V2O3@C into Zn3(OH)2V2O7·2H2O@C for high-performance aqueous Zn-ion batteries

Cong Gao,Wei Sun,Weitong Zhang,Qiao Zhang,Shanyi Guang,Qianjin Chen

Open-framework crystal structured vanadates have been extensively investigated as cathode materials for aqueous zinc-ion batteries (ZIBs). However, the inherent challenges of poor electronic conductivity and structural instability compromise the rate capability and overall cycle life. Herein, we first successfully synthesized octahedral MIL-101(V) and prepared the Zn 3 (OH) 2 V 2 O 7 ·2H 2 O@C (ZVOH@C) composite by in-situ electrochemical conversion of MIL-101(V)-derived crystalline V 2 O 3 and carbon composite (V 2 O 3 @C). The ZVOH@C composite of open-framework crystal structured Zn 3 (OH) 2 V 2 O 7 ·2H 2 O and conductive carbon skeleton not only possesses more active sites, more stable crystal structure and higher electrical conductivity , but also provides faster Zn 2+ diffusion kinetics. As expected, the ZVOH@C composite electrode exhibits excellent capacity of 506.3 mAh/g at a current density of 1.0 A/g, exceptional rate performance (375.7 mAh/g at 20.0 A/g), and impressive long-term cycling stability, maintaining 314.5 mAh/g over 5000 cycles at 20.0 A/g. This study demonstrates a promising method for designing new cathode materials through in-situ electrochemical synthesis for ZIBs .

研究领域: 材料科学 · 电化学

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Hydrothermal synthesis of C-doped Zn3(OH)2V2O7 nanorods and their photocatalytic properties under visible light illumination

In-situ electrochemical conversion of V2O3@C into Zn3(OH)2V2O7·2H2O@C for high-performance aqueous Zn-ion batteries