Masking effect of copper oxides photodeposited on titanium dioxide: exploring UV, visible, and solar light activity

2016 ◽  
Vol 6 (13) ◽  
pp. 5079-5087 ◽  
Author(s):  
Wai Ruu Siah ◽  
Hendrik O. Lintang ◽  
Mustaffa Shamsuddin ◽  
Hisao Yoshida ◽  
Leny Yuliati
Keyword(s):  
Titanium Dioxide ◽  
Copper Oxides ◽  
Solar Light ◽  
Masking Effect ◽  
Light Activity ◽  
Uv Visible ◽  
Effect Of Copper

UV, visible, and solar light activations gave different optimum loadings of CuO due to the different masking effects of CuO photodeposited on TiO2.

N-Doped titanium dioxide nanosheets: Preparation, characterization and UV/visible-light activity

2018 ◽  
Vol 232 ◽  
pp. 397-408 ◽  
Author(s):  
Zuzana Barbieriková ◽  
Eva Pližingrová ◽  
Monika Motlochová ◽  
Petr Bezdička ◽  
Jaroslav Boháček ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Visible Light ◽  
Light Activity ◽  
Uv Visible ◽  
Doped Titanium Dioxide

scholarly journals Surface modified titanium dioxide using transition metals: nickel as a winning transition metal for solar light photocatalysis

2018 ◽  
Vol 6 (21) ◽  
pp. 9882-9892 ◽  
Author(s):  
Andraž Šuligoj ◽  
Iztok Arčon ◽  
Matjaž Mazaj ◽  
Goran Dražić ◽  
Denis Arčon ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Transition Metal ◽  
Transition Metals ◽  
Redox Potential ◽  
Solar Light ◽  
Reduction Reactions ◽  
Light Activity ◽  
Surface Modified ◽  
Positive Effect ◽  
Supported Metal

Ni and Zn show a winning combination of redox potential and band positions of TiO2 supported metal-oxo-nanoclusters for enhanced solar-light activity. However, Ni is the only metal which has a positive effect on solar photoactivity in both oxidation and reduction reactions.

Photodegradation of New Methylene Blue N in Aqueous Solution Using Zinc Oxide and Titanium Dioxide as Catalyst

2012 ◽  
Author(s):  
Rusmidah Ali ◽  
Boon Siew Ooi
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Zinc Oxide ◽  
Titanium Dioxide ◽  
Optimum Condition ◽  
Metal Ion ◽  
Optimum Ratio ◽  
Photodegradation Rate ◽  
Uv Visible ◽  
Uv Lamp

Dalam kajian ini, ZnO dan TiO2 digunakan sebagai fotomangkin dalam pendegradasian pewarna New Methylene Blue N (NMBN). Kadar fotodegradasi diukur menggunakan alat spektrofotometer UV-Vis. Dalam kajian ini, New Methylene Blue N menunjukkan nilai serapan pada λ = 590 nm dan λ = 286 nm. Lampu UV (λ = 354 nm) digunakan dalam proses fotodegradasi. Dalam proses degradasi menggunakan ZnO menunjukkan 81.42% NMBN terdegradasi pada λ = 590 nm dan 77.75% pada λ = 286 nm. Sebaliknya, degradasi menggunakan TiO2 adalah 25.68% pada λ = 590 nm dan 26.37% pada λ = 286 nm. Peratus degradasi New Methylene Blue N ialah 88.89% dan 68.94% pada masing-masing λ = 590 nm dan λ = 286 nm apabila ditambahkan dengan H2O2. Campuran ZnO dan TiO2 dalam nisbah 85: 15 (0.085 g; 0.015 g) merupakan campuran fotomangkin yang paling optimum iaitu dengan peratus degradasi NMBN sebanyak 96.97% dan 93.61% pada λ = 590 nm dan λ = 286 nm. Penambahan ion logam Cu2+ memberikan peratus degradasi tertinggi berbanding ion logam lain iaitu 83.83% pada λ = 590 nm. Penambahan ion logam Pb2+ memberikan peratus degradasi tertinggi pada λ = 286 nm iaitu 81.25% pewarna terdegradasi. Keadaan optimum dicapai pada pH 5.90, dengan peratus degradasi tertinggi iaitu 92.84% dan 89.30% pada masing-masing λ = 590 nm dan λ = 286 nm. Kata kunci: New Methylene Blue N; fotodegradasi; larutan; ZnO; TiO2 In this study, ZnO and TiO2 are used as photocatalyst to degrade the dye, New Methylene Blue N (NMBN). The photodegradation rate was measured using UV-Visible spectrophotometer. In this study, New Methylene Blue N showed absorption values at λ = 590 nm and λ = 286 nm. UV lamp (λ = 354 nm) is used in the photodegradation process. Results showed that ZnO is a better photocatalyst compared to TiO2. The degradation by ZnO showed that 81% of NMBN was degraded at λ = 590 nm and 77.75% at λ = 286 nm. In contratst, the degradation using TiO2 was 25.68% at λ = 590 nm and 26.37% at λ = 286 nm. The percent degradation of New Methylene Blue N is 88.89% and 68.94% at λ = 590 nm and λ = 286 nm respectively when H2O2 was added. A mixture of ZnO and TiO2 in the ratio of 85: 15 (0.085 g: 0.015 g) is the most optimum ratio for the mixed photocatalyst where the degradation percentage of NMBN are 96.97% and 93.61% at λ = 590 nm and λ = 286 nm. The addition of Cu2+ metal ion gave the highest percentage of degradation (83.83% at λ = 590 nm) compared to other metal ions. The addition of Pb2+ gave the highest percentage of degradation at λ = 286 nm with 81.25% degradation of the dye. The optimum condition was achieved at pH 5.90, which gave the highest percentage degradation, 92.84% and 89.30% at λ = 590 nm and λ = 286 nm respectively. Key words: New Methylene Blue N; photodegradation; aqueous; ZnO; TiO2

Titanium dioxide/carbon nitride nanosheet nanocomposites for gas phase CO2 photoreduction under UV-visible irradiation

2019 ◽  
Vol 242 ◽  
pp. 369-378 ◽  
Author(s):  
Angus Crake ◽  
Konstantinos C. Christoforidis ◽  
Robert Godin ◽  
Benjamin Moss ◽  
Andreas Kafizas ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Gas Phase ◽  
Carbon Nitride ◽  
Co2 Photoreduction ◽  
Visible Irradiation ◽  
Uv Visible

scholarly journals Ruthenium (Ru) Doped Titanium Dioxide (P25) Electrode for Dye Sensitized Solar Cells

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1532 ◽  
Author(s):  
Tharmakularasa Rajaramanan ◽  
Muthukumarasamy Natarajan ◽  
Punniamoorthy Ravirajan ◽  
Meena Senthilnanthanan ◽  
Dhayalan Velauthapillai
Keyword(s):  
Titanium Dioxide ◽  
Electrochemical Impedance ◽  
Short Circuit ◽  
Control Cell ◽  
Dye Sensitized Solar Cells ◽  
Doped Tio2 ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Tio2 Nanomaterials ◽  
Uv Visible

In this study, P25-titanium dioxide (TiO2) was doped with ruthenium (Ru) by systematically varying the Ru content at 0.15, 0.30, 0.45 and 0.6 mol%. The synthesized Ru-doped TiO2 nanomaterials have been characterized by X-ray diffraction (XRD), Raman spectroscopy, energy-dispersive X-ray (EDX) analysis, UV-visible (UV–Vis) spectroscopy, and electrochemical impedance (EIS) spectroscopy. The XRD patterns of undoped and Ru-doped TiO2 nanomaterials confirm the presence of mixed anatase and rutile phases of TiO2 while EDX spectrum confirms the presence of Ti, O and Ru. Further, UV-visible absorption spectra of doped TiO2 nanomaterial reveal a slight red shift on Ru-doping. The short circuit current density (JSC) of the cells fabricated using the Ru-doped TiO2 photoanode was found to be dependent on the amount of Ru present in TiO2. Optimized cells with 0.3 mol% Ru-doped TiO2 electrodes showed efficiency which is 20% more than the efficiency of the control cell (η = 5.8%) under stimulated illumination (100 mWcm−2, 1 sun) with AM 1.5 filter. The increase in JSC resulted from the reduced rate of recombination upon doping of Ru and this was confirmed by EIS analysis.

Surface oxygen vacancy induced solar light activity enhancement of a CdWO4/Bi2O2CO3 core–shell heterostructure photocatalyst

2017 ◽  
Vol 19 (22) ◽  
pp. 14431-14441 ◽  
Author(s):  
Chunming Yang ◽  
Guimei Gao ◽  
Junjun Zhang ◽  
Ruiping Liu ◽  
Ruicheng Fan ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Hydrothermal Process ◽  
Solar Light ◽  
Core Shell ◽  
Surface Oxygen ◽  
Surface Oxygen Vacancy ◽  
Light Activity ◽  
Activity Enhancement

A CdWO4/Bi2O2CO3 core–shell heterostructure photocatalyst was fabricated via a facile two-step hydrothermal process.

scholarly journals Ceftriaxone Degradation by Titanium Dioxide (TiO2) Nanoparticles: Toxicity and Degradation Mechanism

2020 ◽  
Vol 6 (1) ◽  
pp. 82-89
Author(s):  
Mohammad Rofik Usman ◽  
Azmi Prasasti ◽  
Sovia Islamiah ◽  
Alfian Nur Firdaus ◽  
Ayu Wanda Marita ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Tio2 Nanoparticles ◽  
Degradation Mechanism ◽  
Degradation Process ◽  
Light Sources ◽  
E Coli ◽  
Cephalosporin Antibiotics ◽  
Uv Visible ◽  
Uv Lamp ◽  
Degradation Degree

Ceftriaxone is a third generation of cephalosporin antibiotics that commonly used in patients with ulcers. Ceftriaxone residues in the environment are degraded using Titanium dioxide (TiO2) nanoparticles. Degradation of ceftriaxone using TiO2 nanoparticles was influenced by environmental conditions, such as light sources, pH of the solution, the mass of TiO2 nanoparticles, and the length of radiation. The remained ceftriaxone was analyzed by using a spectrophotometer UV-visible. The toxicity of the solution after the degradation process was tested on Escherichia coli and the type of products resulted was analyzed using Liquid Chromatography-Mass Spectrophotometry (LC-MS). The optimum conditions in degrading 50 mL 250 ppm ceftriaxone was radiation under a mercury UV lamp (white), pH 8, and 100 mg of TiO2 nanoparticles for 9 hours. The degradation degree of ceftriaxone obtained was 96.52%, producing simpler compounds that not toxic to E. Coli.

scholarly journals Author Correction: Novel multilayer TiO2 heterojunction decorated by low g-C3N4 content and its enhanced photocatalytic activity under UV, visible and solar light irradiation

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Yizheng Wang ◽  
Jiang Yu ◽  
Weidong Peng ◽  
Jing Tian ◽  
Chun Yang
Keyword(s):  
Photocatalytic Activity ◽  
Light Irradiation ◽  
Solar Light ◽  
Solar Light Irradiation ◽  
Uv Visible

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

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