Unique g-C3N4/PDI-g-C3N4 homojunction with synergistic piezo-photocatalytic effect for aquatic contaminant control and H2O2 generation under visible light

The visible light–driven ZnS–TiO2/RGO nanocomposites, with good visible light–driven photocatalytic activity, utilizing graphene oxide as precursor, were successfully synthesized via a facile solvothermal thermal method with graphene oxide as precursor. Ti4+ ions were derived from titanium dioxide powder (TiO2, P25) and tetrabutyl titanate. S2− ions and Zn2+ ions were provided by sodium sulfide and zinc acetate, respectively. The photocatalytic and absorbance activity of the nanocomposites was investigated through the photocatalytic degradation of methylene blue in aqueous solution. The results showed that the ZnS–TiO2/RGO nanocomposite prepared by tetrabutyl titanate exhibited better photocatalytic and adsorbance activity for methylene blue under visible light irradiation and its photocatalytic efficiency reached 90% in 60-min light irradiation, almost 1.5 times that of the synthesized ZnS–TiO2/RGO by P25, which was attributed to a cooperative reaction because of an increase of photo-absorption effect of graphene sheets and photocatalytic effect of ZnS nanoparticles. The adsorbance activity for ZnS–TiO2/RGO–tetrabutyl titanate) reached 48%, which was almost 1.7 times higher than that of ZnS–TiO2/RGO-P25 and almost 3.7 times higher than that of ZnS/RGO.

Download Full-text

Plasma electrochemical synthesis of cuprous oxide nanoparticles and their visible-light photocatalytic effect

Electrochimica Acta ◽

10.1016/j.electacta.2016.11.158 ◽

2016 ◽

Vol 222 ◽

pp. 1677-1681 ◽

Cited By ~ 17

Author(s):

Jiandi Liu ◽

Bangbang He ◽

Qiang Chen ◽

Hai Liu ◽

Junshuai Li ◽

...

Keyword(s):

Visible Light ◽

Cuprous Oxide ◽

Electrochemical Synthesis ◽

Oxide Nanoparticles ◽

Photocatalytic Effect ◽

Cuprous Oxide Nanoparticles ◽

Visible Light Photocatalytic

Download Full-text

Visible-light activated photocatalytic effect of glass and glass ceramic prepared by recycling waste slag with hematite

Pure and Applied Chemistry ◽

10.1515/pac-2016-1018 ◽

2017 ◽

Vol 89 (4) ◽

pp. 535-544 ◽

Cited By ~ 6

Author(s):

Shiori Ishikawa ◽

Balazs Kobzi ◽

Kosuke Sunakawa ◽

Szilvia Nemeth ◽

Attila Lengyel ◽

...

Keyword(s):

Visible Light ◽

Local Structure ◽

Marked Decrease ◽

Relaxation Spectrum ◽

Glass Ceramics ◽

Liquid Nitrogen Temperature ◽

Homogeneous Sample ◽

Recycled Glass ◽

Photocatalytic Effect ◽

Heat Treated

Abstract A relationship between the local structure and the visible-light activated photocatalytic effect was investigated in the glass and glass ceramics prepared by recycling waste slag, which was discharged from a Tokyo Household Garbage Combustion Plant. For the preparation of a homogeneous sample of waste slag recycled glass, (WSRG), 10 wt% of Na2CO3 and 10–50 wt% of Fe2O3 were added. 57Fe-Mössbauer spectra of WSRG recorded at liquid nitrogen temperature showed three types of magnetic hfs; one due to FeII(Oh) with δ of 1.21 mm s−1 and Hint of 46.7 T, one due to FeIII(Oh) with δ of 0.46 mm s−1 and Hint of 44.1 T, and the other due to FeIII(Td) with δ of 0.38 mm s−1 and Hint of 47.8 T. They were superimposed on a relaxation spectrum due to superparamagnetic hematite. Methylene blue (MB) degradation test with 40 mg of the heat treated WSRG (50 wt% Fe2O3), under the visible-light irradiation for 6 h showed a marked decrease in the concentration of MB from 20 to 7.7 μmol L−1 with a rate constant (k) of 2.7×10−3 min−1 which was close to the k, 9.26×10−3 min− 1, recently obtained in 15Na2O⋅15CaO⋅40Fe2O3⋅ 11Al2O3⋅19SiO2 glass.

Download Full-text

Photocatalytic effect of carbon-modified n-TiO2 nanoparticles under visible light illumination

Applied Catalysis B Environmental ◽

10.1016/j.apcatb.2005.11.008 ◽

2006 ◽

Vol 64 (3-4) ◽

pp. 312-317 ◽

Cited By ~ 138

Author(s):

Chengkun Xu ◽

Richard Killmeyer ◽

McMahan L. Gray ◽

Shahed U.M. Khan

Keyword(s):

Visible Light ◽

Tio2 Nanoparticles ◽

Light Illumination ◽

Photocatalytic Effect ◽

Visible Light Illumination

Download Full-text

Flower-like CuS/graphene oxide with photothermal and enhanced photocatalytic effect for rapid bacteria-killing using visible light

Rare Metals ◽

10.1007/s12598-021-01759-4 ◽

2021 ◽

Author(s):

Rui Lv ◽

Yan-Qin Liang ◽

Zhao-Yang Li ◽

Sheng-Li Zhu ◽

Zhen-Duo Cui ◽

...

Keyword(s):

Graphene Oxide ◽

Visible Light ◽

Photocatalytic Effect ◽

Bacteria Killing

Download Full-text

Visible Light-Activated Photocatalytic Effect of Iron-Containing Silicate Glass - A Review

ACS Symposium Series - Green Catalysts for Energy Transformation and Emission Control ◽

10.1021/bk-2014-1184.ch004 ◽

2014 ◽

pp. 71-84 ◽

Cited By ~ 1

Author(s):

Y. Takahashi ◽

S. Kubuki ◽

T. Nishida

Keyword(s):

Visible Light ◽

Silicate Glass ◽

Photocatalytic Effect

Download Full-text

A Novel Fenton Process Without H2O2 or Fe Addition Realized by Visible Light-Activated Cu2O/Rectorite Composite

Journal of Nanoelectronics and Optoelectronics ◽

10.1166/jno.2018.2457 ◽

2018 ◽

Vol 13 (10) ◽

pp. 1564-1575

Author(s):

Yurong Wang

Keyword(s):

Visible Light ◽

Diffuse Reflectance Spectroscopy ◽

Radical Scavenger ◽

Fenton Process ◽

Experimental Conditions ◽

Solid State Method ◽

X Ray ◽

Photocatalytic Effect ◽

Uv Visible ◽

Mixture System

A novel, self-established, immobilised Fenton process (SIFP) was designed using a visible light-activated nano-Cu2O/rectorite composite (nCu2O/R). The nCu2O/R was synthesised using a low temperature, solid-state method and was characterised using scanning electron microscopy (SEM), X-ray powder diffraction (XRD), UV-Visible diffuse reflectance spectroscopy (UV-Vis DRS) and X-ray fluorescence (XRF). Under the following experimental conditions: 160 mg/L Reactive Brilliant Red X-3B (named as X-3B) solution, neutral pH, and 1 g/L nCu2O/R dosage, 72% decoloration and 70% COD removal were achieved. Hydroxyl radicals (.OH) were indirectly detected in this system without the addition of H2O2 or Fe2+ or the adjustment of the pH. Isopropanol (IP) was added as a radical scavenger into the SIFP to provide further evidence that OH played a key role in the photocatalytic degradation of X-3B by nCu2O/R. Compared with the Cu2 O/Fe2+ Fenton-like process (CFP), the Fe-bearing clay/H2O2 system (FCHS) and the Cu2O+rectorite physical mixture system (PMS), the SIFP had a greater discoloration capability. The photocatalytic effect of the SIFP is due to a synergistic catalytic effect caused by the coupling of two advanced oxidation processes (AOPs), semiconductor photocatalysis technology (consisting of Cu2O and visible light) and Fenton processes (consisting of Fe and H2O2). The content of Fe and Cu2O were changed in nCu2O/R composites to study the role that Fe and Cu2O played in the SIFP and to further study the photocatalytic mechanism of the nCu2O/R composite.

Download Full-text

Open air plasma deposited antimicrobial SiOx/TiOx composite films for biomedical applications

Current Directions in Biomedical Engineering ◽

10.1515/cdbme-2016-0013 ◽

2016 ◽

Vol 2 (1) ◽

pp. 43-47

Author(s):

Christin Rapp ◽

Andreas Baumgärtel ◽

Lucas Artmann ◽

Markus Eblenkamp ◽

Syed Salman Asad

Keyword(s):

Visible Light ◽

Composite Coatings ◽

Composite Films ◽

Chemical Vapour ◽

Atmospheric Pressure Plasma ◽

Antimicrobial Effect ◽

Deposition Process ◽

Structure Property ◽

Air Plasma ◽

Photocatalytic Effect

AbstractOpen air atmospheric pressure plasma jet (APPJ) enhanced chemical vapour deposition process was used to deposit biocompatible SiOx/TiOx composite coatings. The as deposited films are hydrophilic and show visible light induced photocatalytic effect, which is a consequence of the formation of defects in the TiOx structure due to the plasma process. This photocatalytic effect was verified by the demonstration of an antimicrobial effect under visible light on E. coli as well as by degradation of Rhodamine B. The films are non-cytotoxic as shown by the cytocompatibility tests. The films are conductive to cell growth and are stable in DMEM and isopropanol. The structural evaluation using SEM, EDS and XPS shows a dispersion of TiOx phase in a SiOxCyHz matrix. These analyses were used to correlate the structure-property relationship of the composite coating.

Download Full-text