TiO2-Pt composite photocatalyst for photodegradation and chemical reduction of recalcitrant organic pollutants

Photocatalytic degradation of waste pollutants using TiO2is a promising technology. Recently, the use of bentonite for the removal of organic pollutants was widely studied because of large specific surface areas. Studies have shown that TiO2supported on bentonite, or TiO2/bentonite composite, exhibits bifunctionality of adsorption and photo catalysis in synergism. This paperpresents a literature review of the preparation and modification techniques of bentonite/TiO2composite photocatalyst, and their characteristics. The review will also focus on the current researches on the degradation of water organic pollutants by using bentonite/TiO2composite photocatalyst and its key influencing factors.

Download Full-text

Catalytic potential of cobalt oxide and agar nanocomposite hydrogel for the chemical reduction of organic pollutants

International Journal of Biological Macromolecules ◽

10.1016/j.ijbiomac.2020.08.140 ◽

2020 ◽

Vol 164 ◽

pp. 2922-2930 ◽

Cited By ~ 2

Author(s):

Ashi Khalil ◽

Nauman Ali ◽

Adnan Khan ◽

Abdullah M. Asiri ◽

Tahseen Kamal

Keyword(s):

Cobalt Oxide ◽

Organic Pollutants ◽

Chemical Reduction ◽

Nanocomposite Hydrogel ◽

Catalytic Potential

Download Full-text

Fabrication of novel p–n heterojunction BiOI/La2Ti2O7 composite photocatalysts for enhanced photocatalytic performance under visible light irradiation

Dalton Transactions ◽

10.1039/c6dt00862c ◽

2016 ◽

Vol 45 (19) ◽

pp. 7986-7997 ◽

Cited By ~ 63

Author(s):

Yanhui Ao ◽

Kedan Wang ◽

Peifang Wang ◽

Chao Wang ◽

Jun Hou

Keyword(s):

Visible Light ◽

Organic Pollutants ◽

Visible Light Irradiation ◽

Photocatalytic Performance ◽

Light Irradiation ◽

Composite Photocatalyst ◽

Composite Photocatalysts ◽

First Time

A novel BiOI/La2Ti2O7 composite photocatalyst with p–n heterojunctions was prepared for the first time. The as-obtained photocatalysts exhibit efficient activity under visible light irradiation for degradation of organic pollutants.

Download Full-text

Synthesis of biomass-supported CuNi zero-valent nanoparticles through wetness co-impregnation method for the removal of carcinogenic dyes and nitroarene

Green Processing and Synthesis ◽

10.1515/gps-2020-0028 ◽

2020 ◽

Vol 9 (1) ◽

pp. 237-247

Author(s):

Shah Hussain ◽

Hani S. H. Mohammed Ali ◽

Shahid Ali Khan ◽

Aliya Farooq ◽

Najla bint Saud Al-Saud ◽

...

Keyword(s):

Methylene Blue ◽

Methyl Orange ◽

Elemental Composition ◽

Organic Pollutants ◽

Persistent Organic Pollutants ◽

Rhodamine B ◽

Congo Red ◽

Chemical Reduction ◽

Impregnation Method ◽

Crystalline Peak

AbstractStabilization of zero-valent CuNi nanoparticles (NPs) supported on Cicer arietenum (CP) is reported here for the reduction and removal of persistent organic pollutants. The functional groups and interactions of NPs with the CP were determined by ATR-FTIR. The crystallinity, morphology, and the elemental composition of the samples were determined through powder XRD, FESEM, and EDS techniques, respectively. The XRD spectrum displayed a sharp crystalline peak at 43.9 for CuNi. The Cu and Ni zero-valent NPs displayed a peak at almost the same region, and thus, both the peaks are merged and appeared as a single peak. The chemical reduction/degradation of eight model pollutants, viz., 2-nitrophenol (ONP), 3-nitrophenol (MNP), 4-nitrophenol (PNP), 2,4-dinitrophenol (DNP), methyl orange (MO), congo red (CR), methylene blue (MB), and rhodamine B (RB) were carried out in the presence of NaBH4. The kapp value of 0.1 mM 4NP was highest which was 1.8 × 10−1 min−1 while the slowest rate was observed for CR and RB with kapp 5.5 × 10−3 and 5.4 × 10−3 min−1 respectively. This article helps in the removal of toxic organic pollutants through green supported NPs.

Download Full-text

Nano Gold Doped Nano TiO2 – An Efficient Solar Photocatalyst for the Degradation of Persistent Organic Pollutants

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.938.292 ◽

2014 ◽

Vol 938 ◽

pp. 292-296 ◽

Cited By ~ 3

Author(s):

Jesty Thomas ◽

K.R. Chitra

Keyword(s):

Gold Nanoparticles ◽

Photocatalytic Activity ◽

Organic Pollutants ◽

Chemical Reduction ◽

Organic Pollutant ◽

Visible Region ◽

Titania Nanoparticles ◽

Visible Range ◽

Hydrothermal Route ◽

Nano Gold

Novel nanogold doped TiO2nanoparticles are found to be highly efficient for the photocatalytic degradation of organic pollutants. TiO2nanoparticles were synthesized from titanium (IV) isopropoxide through hydrothermal route. Gold nanoparticles were prepared by chemical reduction and stabilization employing D-glucosamine, and were doped in TiO2nanoparticles. The analysis revealed that the diameter of gold nanoparticles used for doping is around 5 nm. Undoped and gold doped samples were characterized by X-ray diffraction (XRD), Raman spectroscopy, UV-Vis diffuse reflectance spectra (DRS) and field emission scanning electron microscopy (SEM). DRS study showed that nanogold doping in titania nanoparticles induces a shift of absorption edge to the visible range and reduces the band gap. Complementing our earlier finding that noble metal doping in titania nanoparticles enable photocatalytic activity in the visible region, it is showed that gold doping enhances photocatalytic activity of the titania nanoparticles. This was confirmed by the degradation of the dye methylene blue repeatedly using gold doped nanoparticles under direct sunlight. Further, the nanoparticles were used to study the degradation of the persistent organic pollutant, β endosulfan, and near complete degradation were observed in an hour. Regenerated nanoparticles were found effective for the degradation of the pesticide for more than three cycles.

Download Full-text