Photocatalytic Degradation of Congo Red Dye Using Silver Doped TiO2 Nanosheets

Fe-doped TiO2 (2, 5, 10, 15 and 20% wt. of Fe) photocatalysts have been synthesized by sol-gel method using titanium aquacomplex precursor. The structure and morphology have been characterized by XRD, BET, SEM, and EDS analyses, Mossbauer and IR spectroscopies. XRD analysis confirmed the anatase structure. The introduction of ferric ions into the titania structure causes its amorphization. The crystallite sizes of obtained samples are around 3 nm. Fe-doped TiO2 samples possess mesoporous structure and high specific surface area (from 274 m2g-1 for 5Fe-TiO2 to 416.4 m2g-1 for 20Fe-TiO2). Mossbauer spectroscopy data confirms the incorporation of Fe3+ ions in the anatase structure. Photocatalytic degradation of Congo red dye using Fe-doped TiO2 photocatalysts was studied under the UV-A light. Optimized conditions for photocatalytic degradation of CR in the presence of hydrogen peroxide are obtained. It was found that the 2Fe-TiO2 sample in the presence of 20 mM H2O2 solution showed highest efficiency in dye photodegradation (99.4%) under UV-A light. The photodegradation kinetics was analyzed using a smartphone and fits well with first-order kinetics model.

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A Facile Hydrothermal Synthesis of Novel CeO2/CdSe and CeO2/CdTe Nanocomposites: Spectroscopic Investigations for Economically Feasible Photocatalytic Degradation of Congo Red Dye

Inorganic Chemistry Communications ◽

10.1016/j.inoche.2021.108750 ◽

2021 ◽

pp. 108750

Author(s):

Mostafa A. Sayed ◽

M.M. Abo-Aly ◽

Ayman A. Abdel Aziz ◽

Amr Hassan ◽

Abdel Naby M. Salem

Keyword(s):

Hydrothermal Synthesis ◽

Photocatalytic Degradation ◽

Congo Red ◽

Congo Red Dye ◽

Spectroscopic Investigations ◽

Red Dye

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Alginate/CMC/ZnO nanocomposite for photocatalytic degradation of Congo red dye

10.1063/5.0008095 ◽

2020 ◽

Author(s):

S. Ramadhani ◽

H. Helmiyati

Keyword(s):

Photocatalytic Degradation ◽

Congo Red ◽

Congo Red Dye ◽

Red Dye

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Development of chitosan decorated Fe3O4 nanospheres for potential enhancement of photocatalytic degradation of Congo red dye molecules

Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy ◽

10.1016/j.saa.2021.120511 ◽

2021 ◽

pp. 120511

Author(s):

Muthuchamy Maruthupandy ◽

Thillaichidambaram Muneeswaran ◽

Thirumalaiswamy Vennila ◽

Muthusamy Anand ◽

Wan-Seob Cho ◽

...

Keyword(s):

Photocatalytic Degradation ◽

Congo Red ◽

Dye Molecules ◽

Congo Red Dye ◽

Fe3o4 Nanospheres ◽

Red Dye

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Photocatalytic Performance Evaluation of Bismuth Doped Tin-Dioxide under UV and Direct Sunlight Irradiation for Congo Red Dye Degradation

Journal of the chemical society of pakistan ◽

10.52568/000689 ◽

2020 ◽

Vol 42 (5) ◽

pp. 687-687

Author(s):

Nauman Ali Nauman Ali ◽

Adnan khan Adnan khan ◽

Aaisha Riaz Aaisha Riaz ◽

Abdullah M Asiri and Tahseen Kamal Abdullah M Asiri and Tahseen Kamal

Keyword(s):

Photocatalytic Degradation ◽

Congo Red ◽

Tin Dioxide ◽

Photocatalytic Performance ◽

Dye Degradation ◽

Sno2 Nanoparticles ◽

Research Work ◽

Precipitation Method ◽

Congo Red Dye ◽

Red Dye

In the current research work, bismuth doped tin-dioxide (Bi-SnO2) was prepared by wet chemical co-precipitation method. The synthesized material was used as a photocatalyst in the degradation of congo red dye (CR) in its aqueous solution. The prepared catalyst was used in the uncalcined- and calcined forms for the photocatalytic reaction. The synthesized catalyst in both forms was characterized by UV-visible spectroscopy, scanning electron microscopy (SEM) and X-ray diffraction (XRD). The XRD revealed that the calcination of the Bi-SnO2 improved its crystallinity. The SEM showed that the Bi-SnO2 had average size less than 150nm. Photocatalytic degradation of CR dye was carried out under ultra-violet light as well as under sunlight. While testing the photocatalytic degradation performance, it was found that more than 80% of the CR was degraded by using Bi-SnO2 nanoparticles under both lighting conditions. Moreover, the calcined Bi-SnO2 nanoparticles showed better photocatalytic performance as compared to its uncalcined form. The present work provides a viable way to make efficient photocatalyst based-on Bi-SnO2 to employ under UV and sunlight for the degradation of the CR dye without the need of oxidizing or reducing agents.

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Visible light driven efficient photocatalytic degradation of Congo red dye catalyzed by hierarchical CuS–Bi2CuxW1−xO6−2x nanocomposite system

RSC Advances ◽

10.1039/c6ra02612e ◽

2016 ◽

Vol 6 (42) ◽

pp. 35589-35601 ◽

Cited By ~ 28

Author(s):

Yagna Prakash Bhoi ◽

Swaraj Rashmi Pradhan ◽

Chinmaya Behera ◽

B. G. Mishra

Keyword(s):

Visible Light ◽

Photocatalytic Degradation ◽

Congo Red ◽

Nanocomposite Materials ◽

Congo Red Dye ◽

System P ◽

Nanocomposite System ◽

Visible Light Driven ◽

Red Dye

A series of CuS–Bi2CuxW1−xO6−2x nanocomposite materials were prepared and evaluated as photocatalyst for degradation of Congo red dye from aqueous sources.

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