Synthesis, characterization and photocatalytic activities of Al-doped ZnO for degradation of methyl orange dye under UV light irradiation

2021 ◽  
Author(s):  
Hartini Ahmad Rafaie ◽  
Nur Aliyah Alwani Mohd Nazam ◽  
Nurul Infaza Talalah Ramli ◽  
Ruziana Mohamed ◽  
Muhd Firdaus Kasim
Keyword(s):  
Methyl Orange ◽  
Uv Light ◽  
Light Irradiation ◽  
Uv Light Irradiation ◽  
Photocatalytic Activities ◽  
Methyl Orange Dye ◽  
Doped Zno ◽  
Degradation Of Methyl Orange

Photocatalytic Oxidation of Methyl Orange Dye over Titania Nanocatalyst

2012 ◽  
pp. 33-40
Author(s):  
Norzita Ngadi ◽  
Aisyah Nosri
Keyword(s):  
Aqueous Solution ◽  
Methyl Orange ◽  
Light Source ◽  
Photocatalytic Oxidation ◽  
Uv Light ◽  
Light Condition ◽  
Light Irradiation ◽  
Uv Light Irradiation ◽  
Methyl Orange Dye ◽  
Dark Room

In this study, the ability of titania dioxide nanoparticles (TiO ) to remove methyl orange dye in aqueous solution was investigated. The effects of TiO dosage (i.e. 0.4, 0.8, 1.2, 1.6 and 2 g), pH (i.e. 4, 6, 7, 8, 10 and 12) temperature (30, 40 and 50°C) and light source (i.e. UV, sunlight and dark room) on the removal of methyl orange dye were studied. The experiments were conducted under the UV light irradiation with the presence of air bubbling. The samples were analyzed using UV-vis spectrophotometer at wavelength of 467 nm. From this study, it was found that the TiO dose, pH, temperature and the presence of light had a strong effect on the removal of dye. The removal of dye was optimum at TiO loading of 2.0 g, pH of 4, temperatureof 30°C and under UV light condition. Dalam kajian ini, kebolehupayaan titanium dioksida (TiO ) untuk menyingkirkan pewarna metil oren daripada larutan telah dikaji. Kesan-kesan dos TiO (iaitu 0.4, 0.8, 1.2, 1.6 and 2 g ), pH (iaitu 4,6,8,10 dan 12) suhu (iaitu 30, 40 and 50°C) dan sumber cahaya (UV, cahaya matahari dan bilik yang gelap) terhadap penyingkiran pewarna metil oren telah dikaji. Eksperimen telah dijalankan di bawah radiasi UV dengan kehadiran oksigen terlarut. Sampel telah dianalisa menggunakan UV-vis spektrofotometer dengan panjang gelombang 467 nm. Daripada kajian ini, telah didapati bahawa dos TiO , pH, suhu dan kehadiran cahaya memberikan kesan yang ketara terhadap penyingkiran pewarna. Penyingkiran pewarna adalah paling optimum pada dos TiO, 2 g, pH, 4, suhu, 30°C dan dibawah cahaya UV.

scholarly journals Facile Hydrothermal Synthesis of SnO2 Nanospheres as Photocatalysts

2017 ◽  
Vol 2017 ◽  
pp. 1-6
Author(s):  
Wenquan Hu ◽  
Xiaoguang Yuan
Keyword(s):  
Methylene Blue ◽  
Methyl Orange ◽  
Organic Dyes ◽  
Uv Light ◽  
Average Diameter ◽  
Potential Candidate ◽  
Wastewater Purification ◽  
Uv Light Irradiation ◽  
Degradation Rates ◽  
Photocatalytic Activities

Large amounts of SnO2 nanospheres are successfully synthesized through a simple and effective hydrothermal method. The as-synthesized products consist of numerous small SnO2 nanocrystals with an average diameter of 40 nm. The as-prepared SnO2 nanospheres are further used as the photocatalysts for photodegrading several organic dyes (methylene blue, methyl orange, Congo red, and rhodamine B) under UV light irradiation. The photocatalytic results show that the as-synthesized SnO2 nanospheres possess high photocatalytic activities. Compared with the degradation rates of other dyes, that of methylene blue reaches 98.5% by 30 min irradiation. It reveals that the as-prepared product might be potential candidate in wastewater purification.

Synthesis and Characterization of Refluxed Sols and TiO2 Thin Films Using TiOSO4

2007 ◽  
Vol 336-338 ◽  
pp. 2189-2192
Author(s):  
Lei Ge ◽  
Ming Xia Xu ◽  
Hai Bo Fang ◽  
Ming Sun
Keyword(s):  
Thin Films ◽  
Methyl Orange ◽  
Uv Light ◽  
Methyl Orange Solution ◽  
Light Transmittance ◽  
Tio2 Films ◽  
Tio2 Thin Films ◽  
Photocatalytic Activities ◽  
Orange Solution ◽  
Degradation Of Methyl Orange

Nano anatase TiO2 thin films on glass slide substrates were prepared via a dip-coating method using refluxed sols (RS) as precursors, then dried under infrared light and calcined at 500°C for 30min. The RS sols and TiO2 films were characterized by FT-IR, XRD, TEM, UV-Vis and SEM. The photocatalytic activities of the film samples were tested by the degradation of methyl orange solution with a concentration of 10mg/L under UV light irradiation. The results reveal that the RS sols are flavescent, alkalescent and contain needle-like anatase crystals. The TiO2 films are uniform, compact and transparent, their maximal light transmittance exceed 80% under visible light region. The degradation of methyl orange results illustrate that the RS-6 TiO2 thin films show the best photocatalytic activities, the decoloration rate of the methyl orange solution with RS-6 TiO2 thin films reachs 99% after irradiated 160min under UV light.

Preparation and Photocatalysis Property of P-N Coupled Photocatalyst CoO/CdS/TiO2

2012 ◽  
Vol 512-515 ◽  
pp. 1677-1682 ◽  
Author(s):  
Fu Sheng Liu ◽  
Sheng Wang ◽  
Lian Lian Liu ◽  
Huan Du
Keyword(s):  
Optical Properties ◽  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Cadmium Concentration ◽  
Light Irradiation ◽  
Photocatalytic Activities ◽  
Photocatalytic Reactions ◽  
Degradation Of Methyl Orange

In this paper, p-n coupled photocatalyst CoO/CdS/TiO2 was prepared by method of impregnation. The structure and optical properties of CdS/TiO2 and CoO/CdS/TiO2 were characterized by XRD, SEM, BET and UV–vis DRS. The photocatalytic activities of the photocatalysts were evaluated by photocatalytic degradation of methyl orange, and the effect of photocorrosion of CdS in CoO/CdS/TiO2 was investigated by analyzing the cadmium concentration in the supernate collected after photocatalytic reactions. The results showed that p-n coupled photocatalyst CoO/CdS/TiO2 not only showed higher efficiency in degradation of methyl orange than CdS/TiO2, but also exhibited resistance against cadmium leakage under light irradiation. The mechanism of the photocorrosion-delaying by p–n junction was also discussed.

Photocatalytic Performance of Polyoxometallate Intercalated Layered Double Hydroxide

2010 ◽  
Vol 663-665 ◽  
pp. 187-190 ◽  
Author(s):  
Yu Hui Zhang ◽  
Ji Xin Su ◽  
Xiao Peng Wang ◽  
Qi Pan ◽  
Wen Qu
Keyword(s):  
Methyl Orange ◽  
Ir Spectra ◽  
Photocatalytic Performance ◽  
Uv Light ◽  
X Ray Diffraction ◽  
X Ray ◽  
Uv Light Irradiation ◽  
Ft Ir ◽  
Double Hydroxide ◽  
Degradation Of Methyl Orange

Based on X-ray diffraction results, the gallery height of modified Mg3Al-LDH was expanded to 9.6Å from the original 4.8Å, indicating that the H3PW12O40 was indeed inserted into the hydroxide layers. Moreover, the results of FT-IR spectra proved the Keggin structure of PW11O397- species. The resulting material showed a high activity of degradation of methyl orange in the presence of H2O2 and UV light irradiation.

Synthesis of Hybrid Cu-Doped TiO2 Photocatalyst for Dye Removal

2019 ◽  
Vol 797 ◽  
pp. 84-91 ◽  
Author(s):  
Ying Pei Lim ◽  
Ying Chin Lim
Keyword(s):  
Incubation Time ◽  
Incubation Temperature ◽  
Dye Degradation ◽  
Uv Light ◽  
Light Irradiation ◽  
Impregnation Method ◽  
Wet Impregnation ◽  
Uv Light Irradiation ◽  
Photocatalytic Activities ◽  
Wet Impregnation Method

Titanium dioxide (TiO2) photocatalyst is one of the promising semiconductors used for the degradation of commercial dyes. However, it has to be doped with other metals to increase its efficiency, reactivity and stability. This study was carried out to synthesize hybrid Cu-doped TiO2 using wet impregnation method by varying the loading of copper precursor (0.3-1.0 wt%), incubation temperature (50-90°C) and incubation time (1-24 h). The synthesized hybrid Cu-doped TiO2 was characterized using XRD, EDX, FESEM and BET to obtain the structural, elemental, and surface morphological information. The photocatalytic activities of the synthesized Cu-doped TiO2 were investigated for the degradation of methyl orange (MO) under UV-light irradiation. The results revealed that the optimum Cu loading was at 0.5wt% Cu with incubation temperature of 50°C and 2h incubation time. The hybrid Cu-doped TiO2 showed an excellent dye degradation efficiency ranging from 40-82% under UV-light irradiation.

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