A review on the development of elemental and codoped TiO2 photocatalysts for enhanced dye degradation under UV–vis irradiation

Nur, Alam S. M.; Sultana, Marzia; Mondal, Atol; Islam, Sumon; Robel, Fataha Nur; Islam, Md. Aminul; Sumi, Mst. Sumaia Aktar

doi:10.1016/j.jwpe.2022.102728

Cited by 165 publications

(60 citation statements)

References 174 publications

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“…Recycling ability is an important factor affecting the practical application of the prepared photocatalyst [ 3 , 11 , 12 , 13 , 14 ]. Therefore, the reuse of the BiVO 4 catalyst after the removal of OTC and TC was studied.…”

Section: Resultsmentioning

confidence: 99%

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Enhanced Photocatalytic Degradation of Tetracycline and Oxytetracycline Antibiotics by BiVO4 Photocatalyst under Visible Light and Solar Light Irradiation

2022

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The efficient degradation of a toxic antibiotic from an aqueous solution is essential for environmental protection. Our research aimed to fabricate a bismuth vanadate (BiVO4) catalyst via a facile hydrothermal method. The prepared catalyst exhibited a monoclinic phase with a band gap energy of 2.33 eV, indicating the excellent visible-light-active properties of a semiconductor. The photocatalytic performance of the synthesized BiVO4 catalyst was studied by determining the removal of tetracycline (TC) and oxytetracycline (OTC) antibiotics. After 240 min, under sunlight conditions, a high performance of 72% and 83% degradation of TC and OTC, respectively, was achieved. The photocatalytic degradation of the antibiotics correlates well with a first-order reaction, with a high rate constant of 0.0102 min−1. Photogenerated electrons and holes played an important role in the removal of the pollutant. After photocatalytic study, the structural stability of the prepared bismuth vanadate photocatalyst was confirmed. The photocatalyst provided a promising performance even after five successive runs. The result indicates the excellent cycling ability of the sample. The present work demonstrates a promising route for the preparation of a BiVO4 catalyst for the complete removal of toxic antibiotics in aqueous solutions.

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Section: Resultsmentioning

confidence: 99%

“…This photocatalyst, however, shows low photoactivity under natural sunlight. Interestingly, visible-light-active catalysts have gained much attention due to the advantages of utilizing abundant solar light [ 3 , 14 , 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Degradation of Tetracycline and Oxytetracycline Antibiotics by BiVO4 Photocatalyst under Visible Light and Solar Light Irradiation

2022

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“…TiO 2 is the most common and first applied semiconductor in photocatalysis [12], as it is naturally abundant, environmentally friendly, and chemically stable, and it can be synthesized by versatile preparation routes in various morphologies [1,5]. However, photocatalysis by pure TiO 2 is rare, which restricts its work in the UV-region to including only 5% of sunlight radiation [1,5] due to its wide bandgap (3.2 eV) and the fast recombination of the electrons/hole pairs [1,5].…”

Section: Tiomentioning

confidence: 99%

Recent Breakthrough in Layered Double Hydroxides and Their Applications in Petroleum, Green Energy, and Environmental Remediation

et al. 2022

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The fast development of the world civilization is continuously based on huge energy consumption. The extra-consumption of fossil fuel (petroleum, coal, and gas) in past decades has caused several political and environmental crises. Accordingly, the world, and especially the scientific community, should discover alternative energy sources to safe-guard our future from severe climate changes. Hydrogen is the ideal energy carrier, where nanomaterials, like layered double hydroxides (LDHs), play a great role in hydrogen production from clean/renewable sources. Here, we review the applications of LDHs in petroleum for the first time, as well as the recent breakthrough in the synthesis of 1D-LDHs and their applications in water splitting to H2. By 1D-LDHs, it is possible to overcome the drawbacks of commercial TiO2, such as its wide bandgap energy (3.2 eV) and working only in the UV-region. Now, we can use TiO2-modified structures for infrared (IR)-induced water splitting to hydrogen. Extending the performance of TiO2 into the IR-region, which includes 53% of sunlight by 1D-LDHs, guarantees high hydrogen evolution rates during the day and night and in cloudy conditions. This is a breakthrough for global hydrogen production and environmental remediation.

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“…Industries utilizing dye which are dying, textile, cosmetics, plastics, pharmaceutical, photographic, and many others, used more than 700,000 tons of various colorings produced from around 100,000 kinds of commercial synthetic dyes (Nur et al, 2022). Dye pollution discharged from these industries is a serious environmental problem, such as the textile industry is utilized an amount of dyestuff at approximately 10 000 tons per year worldwide (Katheresan et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Titanium exists as different polymorphs with various physical properties such as brookite, anatase, and rutile phases (Besançon et al, 2016). Among them, the anatase phase of TiO 2 is the preferable semiconductor because of its long-term photostability, commercial availability, low toxicity, and excellent semiconductor which is a bandgap of 3.2 eV (Lachheb et al, 2011;Nur et al, 2022;Wei et al, 2018). However, photocatalytic e ciency is limited by several parameters such as low surface area, agglomeration of nanoparticles in aqueous media, and defective crystal structure (Mehta et al, 2016).Also, nano-TiO 2 particles have separation and recycling problems thus limiting their application on an industrial scale (Castanheira et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Reusable titania-SBA-15 photocatalyst synthesized by different silica/titania ratios for enhancing methylene blue photodegradation

Göl

Akbay

2022

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In this study, a series of TiO2/SBA-15 photocatalysts were synthesized with different Si/Ti ratios by a one-step hydrothermal method with TiO2 nano-powder as a titanium source. These materials were characterized by XRD, SEM-EDX, N2 adsorption-desorption isotherms-desorption isotherms, XRF, and UV-DRS analysis. During the synthesis of TiO2/SBA-15s, the SBA-15 pore structure and channels did not deteriorate, and the Si/Ti molar ratios are close to the expected nominal ratios. SBA-15 and TiO2/SBA-15s exhibited a uniform- narrow pore size distribution, but TiO2/SBA-15s pore size shifted to a smaller range, and the BET area values of TiO2/SBA-15s materials are in the range of the 621–583 m2/g. TiO2 nanocrystals into the SBA-15 mesopores walls wall up to the ratio of Si/Ti = 16. With high TiO2 loading of that value, clogging occurs in the SBA-15 pores. The optical band gap energies were significantly blue-shifted which is the quantization effects improving the photocatalytic activities Photocatalytic activities of TiO2/SBA-15s were evaluated by degradation of methylene blue under UV-light irradiation at constant TiO2 content. The highest efficiency was obtained in the TiO2/SBA-15 (16) photocatalyst at 79.6%, and all efficiencies in synthesized photocatalyst are higher than bulk TiO2 photocatalyst activity (27.52%) due to the poor dispersion of active phases. Reused photocatalyst has no activity losses for five runs and may be used for long periods without loss of activity. For the stability of the photocatalyst, a combination of XRD, SEM, and N2 adsorption-desorption isotherms was employed after the fifth run. These results demonstrate that the photocatalyst activity and stability are good, and photocatalytic activity was sustainable after reuse for several cycles.

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A review on the development of elemental and codoped TiO2 photocatalysts for enhanced dye degradation under UV–vis irradiation

Cited by 165 publications

References 174 publications

Enhanced Photocatalytic Degradation of Tetracycline and Oxytetracycline Antibiotics by BiVO4 Photocatalyst under Visible Light and Solar Light Irradiation

Enhanced Photocatalytic Degradation of Tetracycline and Oxytetracycline Antibiotics by BiVO4 Photocatalyst under Visible Light and Solar Light Irradiation

Recent Breakthrough in Layered Double Hydroxides and Their Applications in Petroleum, Green Energy, and Environmental Remediation

Reusable titania-SBA-15 photocatalyst synthesized by different silica/titania ratios for enhancing methylene blue photodegradation

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