Surface modification of nanoparticles with octadecyl trichlorosilane and its effects on photocatalytic activity

Tungsten trioxide (WO3) was surface modified with Cu(II) nanoclusters and titanium dioxide (TiO2) nanopowders by using a simple impregnation method followed by a physical combining method. The obtained nanocomposites were studied by scanning electron microscope, X-ray photoelectron spectroscopy spectra, UV-visible light spectra, and photoluminescence, respectively. Although the photocatalytic activity of WO3was negligible under visible light irradiation, the visible light photocatalytic activity of WO3was drastically enhanced by surface modification of Cu(II) nanoclusters and TiO2nanopowders. The enhanced photocatalytic activity is due to the efficient charge separation by TiO2and Cu(II) nanoclusters functioning as cocatalysts on the surface. Thus, this simple strategy provides a facile route to prepare efficient visible-light-active photocatalysts for practical application.

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Surface modification of Na-K 2 Ti 6 O 13 photocatalyst with Cu(II)-nanocluster for efficient visible-light-driven photocatalytic activity

Materials Letters ◽

10.1016/j.matlet.2018.02.132 ◽

2018 ◽

Vol 220 ◽

pp. 50-53 ◽

Cited By ~ 9

Author(s):

Azam khan ◽

Umair Alam ◽

Danish Ali ◽

Detlef Bahnemann ◽

M. Muneer

Keyword(s):

Photocatalytic Activity ◽

Surface Modification ◽

Visible Light ◽

Visible Light Driven

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Reducing the Photocatalytic Activity of Zinc Oxide Quantum Dots by Surface Modification

Journal of the American Ceramic Society ◽

10.1111/j.1551-2916.2009.03142.x ◽

2009 ◽

Vol 92 (9) ◽

pp. 2083-2088 ◽

Cited By ~ 39

Author(s):

Jinfeng Wang ◽

Takuya Tsuzuki ◽

Lu Sun ◽

Xungai Wang

Keyword(s):

Quantum Dots ◽

Zinc Oxide ◽

Photocatalytic Activity ◽

Surface Modification

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Controllable synthesis of phosphate-modified BiPO4 nanorods with high photocatalytic activity: surface hydroxyl groups concentrations effects

RSC Advances ◽

10.1039/c5ra20189f ◽

2015 ◽

Vol 5 (121) ◽

pp. 99712-99721 ◽

Cited By ~ 18

Author(s):

Yan Li ◽

Yawen Wang ◽

Yu Huang ◽

Junji Cao ◽

Wingkei Ho ◽

...

Keyword(s):

Photocatalytic Activity ◽

Surface Modification ◽

Photocatalytic Performance ◽

High Photocatalytic Activity ◽

Hydroxyl Groups ◽

Controllable Synthesis ◽

Surface Hydroxyl ◽

Methylene Orange ◽

Surface Hydroxyl Groups

Surface modification by phosphate efficiently improves the photocatalytic performance of BiPO4 for the degradation of methylene orange (MO), by enhancing the concentration of surface hydroxyl groups and improving its hydrophilicity.

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Surface Modification of the ZnO Nanoparticles with γ-Aminopropyltriethoxysilane and Study of Their Photocatalytic Activity, Optical Properties and Antibacterial Activities

International Journal of Chemical Reactor Engineering ◽

10.1515/ijcre-2015-0141 ◽

2016 ◽

Vol 14 (3) ◽

pp. 785-794 ◽

Cited By ~ 9

Author(s):

Nurun Nahar Rabin ◽

Jannatul Morshed ◽

Hashi Akhter ◽

Md. Saidul Islam ◽

Md. Asjad Hossain ◽

...

Keyword(s):

Photocatalytic Activity ◽

Surface Modification ◽

Zno Nanoparticles ◽

Photoelectron Spectroscopy ◽

Dye Degradation ◽

Antibacterial Activities ◽

Bet Analysis ◽

Modified Zno Nanoparticles ◽

Grafted Nanoparticles ◽

Surface Modified

Abstract Surface modification of Zinc oxide nanoparticles (ZnO) with γ-aminopropyltriethoxy silane (APTES) was investigated. Successful surface modification of the nanoparticles was confirmed experimentally by X-ray Photoelectron Spectroscopy (XPS) and Fourier transform infrared spectroscopy (FT-IR). The effect of the surface modifier concentration on the grafting density and surface area was studied by CHN elemental analysis and Brunauer–Emmett–Teller (BET) analysis. The photocatalytic activity and UV shielding ability of the surface-modified particles prepared in water-ethanol solvent in the presence of the surface modifiers were compared to those of non-modified particles. As a case study, It was observed by methylene blue (MB) dye degradation experiment that the photocatalytic activity in the presence of modified nanoparticles was lower than that observed with non-modified ZnO nanoparticles. Dispersion stability tests visually showed that APTES grafted nanoparticles had acquired better stability than non-modified ZnO nanoparticles in aqueous solution.

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