scholarly journals Creation and research of new bioindifferent photocatalysts that use the energy of solar radiation to purify wastewater from pollutants

2021 ◽  
Vol 895 (1) ◽  
pp. 012024
Author(s):  
K S Makarevich ◽  
O I Kaminsky ◽  
A V Zaitsev ◽  
E A Kirichenko ◽  
V O Krutikova
Keyword(s):  
Photocatalytic Activity ◽  
Low Temperature ◽  
Solar Radiation ◽  
Phase Formation ◽  
Organic Pollutants ◽  
Hydrolytic Stability ◽  
Bismuth Content ◽  
Catalyst Composition ◽  
Strontium Silicate ◽  
Photocatalytic Materials

Abstract This work is devoted to the study of new bioindifferent photocatalysts that use the energy of solar radiation to purify water from organic pollutants. Photocatalytic materials were obtained by a previously developed low-temperature pyrolytic synthesis. Varying the bismuth content in the percursor mixture within 15-30 %, allows controlling the phase formation of the bismuth and strontium silicate phases. The samples obtained at 25 % bismuth in the precursor mixture (in terms of Bi2O3 %, wt.) show the highest photocatalytic activity with Bi12SiO2, Bi4Si3O12 formed in the catalyst composition. Photocatalytic activity of coatings with the predominance of bismuth silicates is inferior to coatings with the predominance of strontium bismuthates, but their greater hydrolytic stability is observed.

Effects of Different Copper Loadings on the Photocatalytic Activity of TiO2 -SiO2 Prepared at a Low Temperature for the Oxidation of Organic Pollutants in Water

ChemCatChem ◽  
2018 ◽  
Vol 10 (14) ◽  
pp. 2982-2993 ◽  
Author(s):  
Tihana Čižmar ◽  
Urška Lavrenčič Štangar ◽  
Mattia Fanetti ◽  
Iztok Arčon
Keyword(s):  
Photocatalytic Activity ◽  
Low Temperature ◽  
Organic Pollutants

Low‐temperature phase formation in the SrF 2 ‐ LaF 3 system

2020 ◽  
Author(s):  
Pavel P. Fedorov ◽  
Alexander A. Alexandrov ◽  
Valery V. Voronov ◽  
Maria N. Mayakova ◽  
Alexander E. Baranchikov ◽  
...  
Keyword(s):  
Low Temperature ◽  
Phase Formation ◽  
Temperature Phase ◽  
Low Temperature Phase

A review on TiO2-based composites for superior photocatalytic activity

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Wail Al Zoubi ◽  
Abbas Ali Salih Al-Hamdani ◽  
Baek Sunghun ◽  
Young Gun Ko
Keyword(s):  
Photocatalytic Activity ◽  
Organic Pollutants ◽  
Cost Efficiency ◽  
High Stability ◽  
Photocatalytic Oxidation ◽  
Oxidation Process ◽  
Ambient Conditions ◽  
Photoelectrochemical Activity ◽  
As Doping ◽  
Degradation Of Pollutants

Abstract Heterogeneous photocatalysts was a promising material for removing organic pollutants. Titanium dioxide (TiO2) was a suitable photocatalyst for its cost efficiency and high stability to reduce various pollutants. Enhancing TiO2 photocatalyst performance by doping with changed metals or non-metal ions and organic compounds have been reviewed. These methods could enhance photoelectrochemical activity via: (i) by a donor of electrons via electron-donor agents that would produce particular defects in TiO2 structure and capture transporters of charge; (ii) by reducing recombination rate of the charge transporters and increasing degradation of pollutants. This study investigates the modification approaches of TiO2 that comprise methods for overcoming the essential TiO2 restrictions and enhancing the photocatalytic degradation of organic pollutants. Consequently, it emphasized on the current progress of modified-TiO2 used for different pollutants in ambient conditions. Amendment techniques, such as inorganic and organic parts as doping, are studied. The reported experimental results obtained with the photocatalytic oxidation process for degrading organic pollutants were also collected and assessed.

scholarly journals Fabrication of TiO2/Fe2O3/CdS systems: effects of Fe2O3 and CdS content on superior photocatalytic activity

RSC Advances ◽  
2021 ◽  
Vol 11 (17) ◽  
pp. 10300-10308
Author(s):  
Hui Feng ◽  
Siqi Feng ◽  
Niu Tang ◽  
Songbai Zhang ◽  
Xiangyang Zhang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Organic Pollutants ◽  
High Performance ◽  
Low Cost

New idea for the low cost synthesis of high performance photocatalysts for the photodegradation of organic pollutants in aqueous solution.

scholarly journals Laser-Ablated ZnO Nanoparticles and Their Photocatalytic Activity toward Organic Pollutants

Materials ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1127 ◽  
Author(s):  
Neli Mintcheva ◽  
Ali Aljulaih ◽  
Wilfried Wunderlich ◽  
Sergei Kulinich ◽  
Satoru Iwamori
Keyword(s):  
Photocatalytic Activity ◽  
Organic Pollutants ◽  
Zno Nanoparticles

scholarly journals Low temperature hydrothermal synthesis of SrTiO3 nanoparticles without alkali and their effective photocatalytic activity

2016 ◽  
Vol 5 (4) ◽  
pp. 298-307 ◽  
Author(s):  
Hongfang Shen ◽  
Youjun Lu ◽  
Yanmin Wang ◽  
Zhidong Pan ◽  
Guozhong Cao ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrothermal Synthesis ◽  
Low Temperature

Ag-TiO2 Nanocomposites: visible or solar light driven plasmonic photocatalysis?

2021 ◽  
Vol 02 ◽  
Author(s):  
Larissa Bach-Toledo ◽  
Patricio G. Peralta-Zamora ◽  
Liziê Daniela Tentler Prola
Keyword(s):  
Photocatalytic Activity ◽  
Solar Radiation ◽  
Noble Metals ◽  
Halogen Lamp ◽  
Tio2 Surface ◽  
Electronic Microscopy ◽  
Visible Radiation ◽  
Artificial Uv ◽  
Positive Effect

Background: The demand for photocatalytic processes assisted by solar radiation has stimulated the upgrading of established systems, as the semiconductor modification with noble metals. Objective: the synthesis, characterization, and photocatalytic activity evaluation of the Ag-TiO2, against sulfamethoxazole molecule, and investigate the significance of the plasmonic phenomenon in Visible (450 - 1000nm) and UV-Vis (315-800 nm) radiation. Methods: Different nanocomposites Ag/TiO2 ratios were synthesized by the deposition of Ag nanoparticles on the TiO2 surface by in-situ photoreduction, and then calcinated at 400°C for 2 hr. The chemical-physical properties of the materials were examined by UV-Vis Diffuse Reflectance (UV-Vis DRS) Scanning Electronic Microscopy (SEM), Transmission Electronic Microscopy (TEM), X-Ray Energy Dispersive Spectroscopy (EDS). The experiments were conducted in a cooled photochemical reactor irradiated by halogen lamp (250W). The degradation of Sulfamethoxazole was monitored by HPLC-DAD. Results: Although the prepared photocatalysts show an intense plasmonic band centered at 500 nm, no photocatalytic activity was observed in the process assisted by artificial visible radiation ( ≥ 450 nm). In processes assisted by artificial UV-Vis radiation, the photolysis rate of the model compound (sulfamethoxazole) was higher than the photocatalytic rate, and in the absence of UV radiation, all the reactions were inhibited. The positive effect of the presence of silver nanoparticles onto the TiO2 surface was only evidenced in studies involving solar radiation. Conclusion: The results suggest the need for a balance between UV and Vis radiation to activate the nanocomposite and perform the sulfamethoxazole degradation.

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