Photocatalytic Removal of Nickel from Aqueous Solutions Using Ultraviolet‐Irradiated TiO2

1997 ◽  
Vol 144 (8) ◽  
pp. 2751-2756 ◽  
Author(s):  
Wen‐Yuan Lin ◽  
Krishnan Rajeshwar
Keyword(s):  
Aqueous Solutions ◽  
Photocatalytic Removal

Photocatalytic removal of cyanide with illuminated TiO2

2011 ◽  
Vol 64 (7) ◽  
pp. 1383-1387 ◽  
Author(s):  
M. Shirzad Siboni ◽  
M. R. Samarghandi ◽  
J.-K. Yang ◽  
S.-M. Lee
Keyword(s):  
Aqueous Solutions ◽  
Langmuir Isotherm ◽  
Industrial Wastewater ◽  
Photocatalytic Oxidation ◽  
Maximum Adsorption Capacity ◽  
Photocatalytic Reaction ◽  
Solution Ph ◽  
Cyanide Concentration ◽  
Photocatalytic Removal ◽  
Oxidation Efficiency

Effects of TiO2 dosage, pH and initial cyanide concentration on the removal efficiency of cyanide from aqueous solutions with illuminated TiO2 have been investigated. Adsorption and oxidation were recognized as significant processes for the elimination of cyanide. From the Langmuir isotherm, the maximum adsorption capacity was determined as 17.24 mg/g at pH 7. Adsorbed amount of cyanide slightly increased as the TiO2 dosage increased. However, as no significant increase was observed above 1 g/L TiO2, an optimum TiO2 dosage was determined as 1 g/L. Photocatalytic oxidation efficiency of cyanide was greatly affected by the solution pH. It increased as the solution pH decreased. The photocatalytic oxidation efficiency after 120 min was 80.4% at pH 3 while it was only 20.4% at pH 11. Photocatalytic oxidation of cyanide was well described by the second-order kinetics. Photocatalytic reaction with illuminated TiO2 can be effectively applied to treat industrial wastewater contaminated with cyanide.

Preparation and characterization of TiO 2 incorporated 13X molecular sieves for photocatalytic removal of acetaminophen from aqueous solutions

2016 ◽  
Vol 104 ◽  
pp. 334-345 ◽  
Author(s):  
Mohammad Malakootian ◽  
Maliheh Pourshaban-Mazandarani ◽  
Hiwa Hossaini ◽  
Mohammad Hassan Ehrampoush
Keyword(s):  
Aqueous Solutions ◽  
Molecular Sieves ◽  
Photocatalytic Removal

Photocatalytic removal of two antibiotic compounds from aqueous solutions using ZnO nanoparticles

2015 ◽  
Vol 57 (31) ◽  
pp. 14774-14784 ◽  
Author(s):  
Shabnam Pourmoslemi ◽  
Ali Mohammadi ◽  
Farzad Kobarfard ◽  
Navid Assi
Keyword(s):  
Aqueous Solutions ◽  
Zno Nanoparticles ◽  
Photocatalytic Removal ◽  
Antibiotic Compounds

scholarly journals Photocatalytic removal of Malachite green dye from aqueous solutions by nano-composites containing titanium dioxide: A systematic review

2021 ◽  
Vol 8 (4) ◽  
pp. 295-302
Author(s):  
Soheila Amiri-Hosseini ◽  
Yalda Hashempour
Keyword(s):  
Aqueous Solutions ◽  
Malachite Green ◽  
Dye Removal ◽  
Web Of Science ◽  
Uv Light ◽  
Photocatalytic Decomposition ◽  
Photocatalytic Process ◽  
Malachite Green Dye ◽  
Photocatalytic Removal ◽  
Aquaculture Industry

Background: Malachite green (MG) is widely used as a fungicide, Bactericide parasiticide in the aquaculture industry, as a food additive, medical disinfectant, and also, as a dye for materials such as silk, leather, paper, etc. In this study, the photocatalytic removal of MG from aqueous solutions using TiO2-containing nanocomposites was reviewed. Methods: In this study, four databases (PubMed, Web of Science, ScienceDirect, and Scopus) were systematically searched to collect studies on the decomposition of MG using nanocomposites containing TiO2 under UV light radiation. Results: In total, 10 related and eligible studies were selected. Based on the results, TiO2 was doped with iron, Sn, Ag, Si, and Ni. The highest percentage of photocatalytic decomposition for MG was observed in Sn > Ni > Ag > Fe > Si. The removal efficiency of MG in the studied papers was between 75%-100%. Conclusion: Recombinant nanocomposites had a higher dye removal percentage than uncombined ones because they play an important role in the photocatalytic process of dye, by producing free radicals.

Tailoring of Nanostructured ZnO-Fe3O4/TiO2 Composite Derived from MIL 125(Ti) for Efficient Photocatalytic Removal of Reactive Blue 21 from Aqueous Solutions

2021 ◽  
Author(s):  
Zahra Esania ◽  
Habibollah Younesi ◽  
Mohsen Nowrouzi
Keyword(s):  
Thermal Stability ◽  
Aqueous Solutions ◽  
Positive Impact ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Wastewater Treatment Process ◽  
Photocatalytic Removal ◽  
Successful Removal ◽  
Adsorption Desorption ◽  
Superparamagnetic Properties

Abstract A novel nanostructured ZnO-Fe3O4/TiO2 composite derived from MIL 125(Ti) was synthesized using mixed solvo-hydrothermal and sol-gel methods for efficient removal of Reactive Blue 21 (RB 21) from aqueous solutions under different conditions. The thermal stability, crystalline structure development, and superparamagnetic properties of the final composite were evaluated by thermogravimetric analysis, X-ray diffraction, and vibrating sample magnetometer instrument. The results approved that the as-synthesized ZnO-Fe3O4/TiO2 possessed a very high thermal stability up to ~ 900°C along with Zn-O, Ti-O, and Fe-O functional groups formation, which endowed superparamagnetic properties to this structure. A significant reduction of surface area from 603.96 (MIL 125(Ti)) to 51.48 m2/g (ZnO-Fe3O4/TiO2) was ascribed to the retailoring in construction, mesoporosity, and pore diameter development with a positive impact on the photocatalytic activities of the final product. The optimum condition with > 99% RB 21 removal was assigned at pH, initial concentration dye, catalyst dosage, and temperature of 2, 50 mg/L, 30 mg/100 mL, and 45°C, respectively. The thermodynamic studies disclosed that the adsorption process was nonspontaneous and endothermic. Furthermore, the synthesized ZnO-Fe3O4/TiO2 composite retained > 95% of its initial removal potential after five successive adsorption/desorption runs. Accordingly, ZnO-Fe3O4/TiO2 can be proposed for the successful removal of RB 21 in the wastewater treatment process.

Enhanced photocatalytic removal of phenol from aqueous solutions using ZnO modified with Ag

2018 ◽  
Vol 225 ◽  
pp. 197-206 ◽  
Author(s):  
V. Vaiano ◽  
M. Matarangolo ◽  
J.J. Murcia ◽  
H. Rojas ◽  
J.A. Navío ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Photocatalytic Removal

Application of Ag-doped TiO2nanoparticle prepared by photodeposition method for nitrate photocatalytic removal from aqueous solutions

2013 ◽  
Vol 51 (37-39) ◽  
pp. 7137-7144 ◽  
Author(s):  
Saeed Parastar ◽  
Simin Nasseri ◽  
Saeedeh Hemmati Borji ◽  
Mehdi Fazlzadeh ◽  
Amir Hossein Mahvi ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Photocatalytic Removal
Sign in / Sign up

Export Citation Format

Share Document