Photocatalytic degradation of dye by Ag/ZnO prepared by reduction of Tollen’s reagent and the ecotoxicity of degraded products

Thongrom, Boonya; Amornpitoksuk, Pongsaton; Suwanboon, Sumetha; Baltrušaitis, Jonas

doi:10.1007/s11814-013-0262-x

Cited by 32 publications

(11 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…orange [20,21] and methylene blue [22] in water. The degradation efficiency largely depends on the adsorption behavior of photocatalyst and pollutant molecules.…”

Section: June 2015mentioning

confidence: 99%

Efficient sorption and photocatalytic degradation of malachite green dye onto NiS nanoparticles prepared using novel green approach

Prasad

Prajapati²,

Selvaraj

2015

Korean J. Chem. Eng.

View full text Add to dashboard Cite

The extract of the Asparagus racemosus leaf tissue works as a stabilizing and capping agent and assists the formation of stable colloidal nanoparticles. Nanoparticles were characterized using UV-vis spectrophotometer, photoluminescence, TEM, EDAX and XRD, respectively. Transmission electron microscopy followed by selected area electron diffraction pattern analysis indicated the formation of near spherical, polydispersed, crystalline NiS of diameter ranging from 4-27 nm. X-ray diffraction studies showed the formation of 110, 101, 300, 021, 220, 221, 131, 410, 401, 321, 330 and 021 planes of hexagonal NiS. EDAX analysis confirmed the presence of Ni and S in nanosphere. The maximum sorption capacity (q m ) of NiS nanoparticles for MG dye was found to be 64.85 mg/g. Decolorization as well as disintegration of malachite green under white light illumination was confirmed by LC-MS studies. Results of the present study suggest that nanosized NiS can play an instrumental role in photocatalytic degradation of malachite green dye present in water bodies.

show abstract

“…orange [20,21] and methylene blue [22] in water. The degradation efficiency largely depends on the adsorption behavior of photocatalyst and pollutant molecules.…”

Section: June 2015mentioning

confidence: 99%

Efficient sorption and photocatalytic degradation of malachite green dye onto NiS nanoparticles prepared using novel green approach

Prasad

Prajapati²,

Selvaraj

2015

Korean J. Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…Смещение фоточувствительности фотокатализаторов в длинноволновую часть спектра достигается за счет применения гетероструктурных композиций, содержащих наряду с ZnO и/или TiO 2 связанные с ними полупроводниковые частицы с меньшей шириной запрещенной зоны [10,11]. Другой подход к увеличению чувствительности фотокатализатора к видимому свету состоит во введении в его структуру тонких пленок или наночастиц металлов [8][9][10][11][12][13][14][15].…”

Section: приведеныunclassified

Прозрачные фотоактивные ZnO-MgO-Ag-=SUB=-2-=/SUB=-O-покрытия на стеклах

Евстропьев¹,

Никоноров²,

Киселев³

et al. 2019

Журнал Технической Физики

View full text Add to dashboard Cite

Transparent ZnO–MgO–Ag_2O coatings are formed on glasses by the polymer–salt method, and the optical properties of these coatings are studied. The optical properties of the films are studied by optical spectroscopy and photoluminescence. The structure of the oxide coatings is studied by X-ray diffraction analysis and scanning electron microscopy. It is found that an increase in the silver concentration in the coatings leads to a decrease in the band gap width of the material. It is shown that the films are characterized by a high transparency in the visible spectral region and can generate singlet oxygen under action of UV radiation (370 nm) and blue light (405 nm).

show abstract

“…Samples were taken periodically. Methylene blue is a model compound commonly used to characterize the photocatalytic performance [52][53][54][55]. A high concentration of methylene blue was chosen to generate slow degradation rates in order to be able to monitor the reaction with reduced error.…”

Section: Photocatalytic Activitymentioning

confidence: 99%

Synthesis of High Crystalline TiO2 Nanoparticles on a Polymer Membrane to Degrade Pollutants from Water

et al. 2018

View full text Add to dashboard Cite

Titanium dioxide (TiO 2 ) is described as an established material to remove pollutants from water. However, TiO 2 is still not applied on a large scale due to issues concerning, for example, the form of use or low photocatalytic activity. We present an easily upscalable method to synthesize high active TiO 2 nanoparticles on a polyethersulfone microfiltration membrane to remove pollutants in a continuous way. For this purpose, titanium(IV) isopropoxide was mixed with water and hydrochloric acid and treated up to 210 • C. After cooling, the membrane was simply dip-coated into the TiO 2 nanoparticle dispersion. Standard characterization was undertaken (i.e., X-ray powder diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, water permeance, contact angle). Degradation of carbamazepine and methylene blue was executed. By increasing synthesis temperature crystallinity and photocatalytic activity elevates. Both ultrasound modification of nanoparticles and membrane pre-modification with carboxyl groups led to fine distribution of nanoparticles. The ultrasound-treated nanoparticles gave the highest photocatalytic activity in degrading carbamazepine and showed no decrease in degradation after nine times of repetition. The TiO 2 nanoparticles were strongly bound to the membrane. Photocatalytic TiO 2 nanoparticles with high activity were synthesized. The innovative method enables a fast and easy nanoparticle production, which could enable the use in large-scale water cleaning.Catalysts 2018, 8, 376 2 of 16 efficiently from water. The main challenge is to generate a low cost, long-term stable, and reusable system with a high activity to degrade organic contaminants.The mode of application of TiO 2 is a crucial parameter as it already defines the degradation rate and success. Theoretically, the photocatalytic activity is the highest when using TiO 2 as nanoparticles in a suspension as the overall surface area can be immense. However, nanoparticles tend to agglomerate to larger particles (i.e., surface area is diminished) and after final cleaning the nanoparticles have to be removed extensively [9,10]. Binding TiO 2 to a support (e.g., membrane [11][12][13][14]) decreases the overall surface area but the degradation of pollutants can be executed in one step. Designing a porous support can overcome the surface area issues of a supported system. Membranes are ideal support systems as they are highly porous and can be produced easily, are cost effective, and exist in many different forms according to the need of the consumer. The pollutant is directly transported through the membrane to the photocatalyst for degradation. Slow transport of the pollutant to the photocatalyst (e.g., diffusion) is avoided. To generate a high surface area compound, the porosity should be high and the pore size low. Nonetheless, decreasing the pore size will increase the energy needed to operate the membrane system. Microfiltration membranes with a pore size of 0.22 and 0.45 µm have been successfully utilized [13,14].Other param...

show abstract

Photocatalytic degradation of dye by Ag/ZnO prepared by reduction of Tollen’s reagent and the ecotoxicity of degraded products

Cited by 32 publications

References 27 publications

Efficient sorption and photocatalytic degradation of malachite green dye onto NiS nanoparticles prepared using novel green approach

Efficient sorption and photocatalytic degradation of malachite green dye onto NiS nanoparticles prepared using novel green approach

Прозрачные фотоактивные ZnO-MgO-Ag-=SUB=-2-=/SUB=-O-покрытия на стеклах

Synthesis of High Crystalline TiO2 Nanoparticles on a Polymer Membrane to Degrade Pollutants from Water

Contact Info

Product

Resources

About