Self-assembly synthesis of BiVO4/Polydopamine/g-C3N4 with enhanced visible light photocatalytic performance

Journal Article · Thu Feb 15 00:00:00 EST 2018 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2017.10.016· OSTI ID:22805396

Huo, Rui ^[1]; Yang, Xue-Ling ^[2]; Yang, Jing-Yu; Yang, Si-Yuan; Xu, Yue-Hua ^[1]

---

1. College of Materials and Energy, South China Agricultural University, Guangzhou, 510642 (China)
2. Guangzhou CAS Test Technical Services Co., Ltd., Guangzhou, 510650 (China)

Highlights: • BiVO{sub 4}/PDA/g-C{sub 3}N{sub 4} was synthesized via simple self-assembly at the room temperature. • PDA has a strong binding affinity to BiVO{sub 4} and g-C{sub 3}N{sub 4} to form BiVO{sub 4}/PDA/g-C{sub 3}N{sub 4}. • BiVO{sub 4}/PDA/g-C{sub 3}N{sub 4} exhibits good stability and reusability in the photocatalytic reaction of glyphosate. • The enhanced activity of BiVO{sub 4}/PDA/g-C{sub 3}N{sub 4} is mainly attributed to the increased charge separation. - Abstract: BiVO{sub 4}/PDA(Polydopamine)/g-C{sub 3}N{sub 4} was synthesized by facile ultrasonic dispersion and self-assembly at the room temperature, and monoclinic BiVO{sub 4} was embedded on PDA/g-C{sub 3}N{sub 4} sheet, which PDA was first formed in situ on the surface of g-C{sub 3}N{sub 4} via self-polymerization of dopamine. The dependence of photocatalytic activity on the structural, electronic and optical properties of the BiVO{sub 4}/PDA/g-C{sub 3}N{sub 4} nanostructure has been explored using XRD, XPS, TEM, SEM, DRS, PL, BET and photocurrent. The BiVO{sub 4}/PDA/g-C{sub 3}N{sub 4} photocatalysts show higher activity of glyphosate degradation than BiVO{sub 4}, g-C{sub 3}N{sub 4} and BiVO{sub 4}/g-C{sub 3}N{sub 4} under visible light irradiation. The enhanced activity of BiVO{sub 4}/PDA/g-C{sub 3}N{sub 4} can be significantly attributed to the improved visible light absorption, enhanced specific surface area and increased charge separation. PDA has a strong and irreversible binding ability onto BiVO{sub 4} and g-C{sub 3}N{sub 4} to form BiVO{sub 4}/PDA/g-C{sub 3}N{sub 4}. This simple method at the room temperature is promising for the synthesis of high performance composite photocatalysts for different applications, such as pollutant degradation, photocatalytic splitting water, etc.

• OSTI ID: 22805396
• Journal Information: Materials Research Bulletin, Vol. 98; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BISMUTH COMPOUNDS
CARBON NITRIDES
DOPAMINE
MONOCLINIC LATTICES
OPTICAL PROPERTIES
PERFORMANCE
PHOTOCATALYSIS
PHOTOCURRENTS
POLYMERIZATION
RADIATION EFFECTS
SCANNING ELECTRON MICROSCOPY
SPECIFIC SURFACE AREA
SYNTHESIS
TEMPERATURE RANGE 0273-0400 K
TRANSMISSION ELECTRON MICROSCOPY
ULTRASONIC WAVES
VANADATES
VISIBLE RADIATION
WATER
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY