g-C3N4/UiO-66 nanohybrids with enhanced photocatalytic activities for the oxidation of dye under visible light irradiation

Journal Article · Thu Mar 15 04:00:00 EDT 2018 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2017.11.028· OSTI ID:22805458

Zhang, Xiaodong; Yang, Yang; Huang, Wenyuan; Yang, Yiqiong ^[1]; Wang, Yuxin ^[2]; He, Chi ^[3]; Liu, Ning ^[1]; Wu, Minghong; Tang, Liang ^[4]

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1. Department of Environmental Science and Engineering, School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093 (China)
2. Institute of Applied Biotechnology, Taizhou Vocation & Technical College, Taizhou Zhejiang 318000 (China)
3. State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an Shaanxi 710049 (China)
4. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444 (China)

Highlights: • G-C{sub 3}N{sub 4}/UiO-66 heterojunctions were synthesized by a facile one-pot method. • G-C{sub 3}N{sub 4}/UiO-66 nanohybrids were used as an visible-light-driven photocatalysts. • G-C{sub 3}N{sub 4}/UiO-66 nanohybrids enhanced the separation of photoexcited carriers. • G-C{sub 3}N{sub 4}/UiO-66 nanohybrids were stable even after the four cycles. - Abstract: In this study, g-C{sub 3}N{sub 4} nanosheets coated UiO-66 nanohybrids were fabricated via a simple solvothermal method. The physicochemical parameters, structural and electrochemical properties of g-C{sub 3}N{sub 4}/UiO-66 nanohybrids (CNUO-x) were investigated. The nanohybrids were systematically characterized by XRD, FT-IR, TGA, TEM, SEM, EDS elemental mappings, XPS, N{sub 2} adsorption-desorption isotherms, PL and DRS. It was found that the addition of moderate g-C{sub 3}N{sub 4} could enhance the separation and migration rate of photo-induced charges, consequently leading to the increase of photocatalytic efficiency. The CNUO-1 nanohybrid exhibited better photocatalytic activity for the oxidation of Rh B under visible light irradiation, and displayed about 6.0 and 3.3 times faster than that of g-C{sub 3}N{sub 4} and UiO-66, respectively. Meanwhile, the nanohybrid showed excellent stability and reusability in four cyclic experiments. Finally, the increased photocatalytic reaction mechanism was also proposed. O{sub 2}{sup −}, h{sup +} and OH were further found to be the main active contributors.

• OSTI ID: 22805458
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 99; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ADSORPTION
CARBON NITRIDES
CARRIERS
DYES
FOURIER TRANSFORM SPECTROMETERS
HETEROJUNCTIONS
IRRADIATION
ISOTHERMS
NANOMATERIALS
OXIDATION
PHOTOCATALYSIS
REACTION KINETICS
SCANNING ELECTRON MICROSCOPY
SYNTHESIS
THERMAL GRAVIMETRIC ANALYSIS
TRANSMISSION ELECTRON MICROSCOPY
VISIBLE RADIATION
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY