Degradation of 4-chloro 2-aminophenol using combined approaches based on microwave and photocatalysis

Barik, Arati J.; Kulkarni, Somesh V.; Gogate, Parag R.

doi:10.1016/j.seppur.2016.05.050

Cited by 25 publications

(10 citation statements)

References 43 publications

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“…Despite this result, the presence of H 2 O 2 in association with TiO 2 significantly enhanced the degradation percentages for UVC and solar processes. Synergic effects associated with the combination of TiO 2 and H 2 O 2 has been shown by other works . When TiO 2 and H 2 O 2 are combined, H 2 O 2 can photo‐generate radicals over the TiO 2 surface suppressing electron/hole recombination and increasing the global rate of •OH generation, consequently increasing degradation rates …”

Section: Resultsmentioning

confidence: 75%

“…According to Figure 5A, all the systems reached more than 95% of degradation at the end of the essay, except solar/H 2 O 2 . It did not exhibit effectiveness in the process because the solar spectrum that reaches the Earth's surface is basically composed of UVA and UVB radiation, while H 2 O 2 requires shorter wavelengths to be excited, such as UVC . Despite this result, the presence of H 2 O 2 in association with TiO 2 significantly enhanced the degradation percentages for UVC and solar processes.…”

Section: Resultsmentioning

confidence: 96%

“…Do Nascimento Júnior et al and Wang et al found similar results for synthetic food dyes degradation applying TiO 2 photocatalysis. The direct photolysis systems did not present adequate results because the synthetic dyes are known to be stable to light . Only 9.48% and 9.91% of dyes degradation was obtained after 360 minutes for UVC and solar systems, respectively.…”

Section: Resultsmentioning

confidence: 97%

“…It did not exhibit effectiveness in the process because the solar spectrum that reaches the Earth's surface is basically composed of UVA and UVB radiation, while H 2 O 2 requires shorter wavelengths to be excited, such as UVC. [54] Despite this result, the presence of H 2 O 2 in association with TiO 2 significantly enhanced the degradation percentages for UVC and solar processes. Synergic effects associated with the combination of TiO 2 and H 2 O 2 has been shown by other works.…”

Section: Preliminary Testsmentioning

confidence: 95%

“…The direct photolysis systems did not present adequate results because the synthetic dyes are known to be stable to light. [54] Only 9.48% and 9.91% of dyes degradation was obtained after 360 minutes for UVC and solar systems, respectively. The results of the degradation for the UVC and solar systems are exhibited in Figure 5.…”

Section: Preliminary Testsmentioning

confidence: 97%

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New aluminum mesh from recyclable material for immobilization of TiO₂ in heterogeneous photocatalysis

et al. 2020

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This study presents a new aluminium mesh made out of soda can rings as a support for titanium dioxide (TiO 2 ) in the degradation of the synthetic dyes Bordeaux Red (BR) and Tartrazine (TT). Three pre-treatments including calcination and acidification steps were investigated in order to select the most efficient immobilization procedure for photocatalysis application. Raw and titania-aluminum meshes were characterized by scanning electron microscopy, x-ray diffraction, diffuse reflectance, and Fourier transform infrared spectroscopy. The material presented itself as a suitable alternative in the immobilization of titania for wastewater treatment. Preliminary tests selected H 2 O 2 /TiO 2(suspension) oxidation systems under natural sunlight and germicidal lamps (UVC) exhibiting 97.2% and 99.5% of degradation in 180 minutes, respectively. Immobilized TiO 2 systems reached high degradation rates (>99%) after 180 minutes in both UVC and solar light-based processes. An experimental planning study was carried out for the processes in order to find the best operational conditions and pseudo-first-order model fit well the removal data (discolouration rates of in the order of 0.0274 and 0.0145 min −1 for UVC and solar light systems, respectively). Parameters such as TOC, COD, and turbidity, revealed a great improvement in the environmental quality of the water after the treatment and acute toxicity bioassays demonstrated a significant decrease in toxicity for both systems after the treatments. The TiO 2 -meshes demonstrated high performance in the removal after five cycles of operation. Therefore, the new immobilization procedure demonstrated that the TiO 2 -aluminum mesh is a feasible option for wastewater treatment and photocatalysis. K E Y W O R D Sadvanced oxidation processes, ecotoxicity, heterogeneous photocatalysis, photocatalyst immobilization, synthetic dyes

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Section: Resultsmentioning

confidence: 75%

Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 97%

Section: Preliminary Testsmentioning

confidence: 95%

Section: Preliminary Testsmentioning

confidence: 97%

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New aluminum mesh from recyclable material for immobilization of TiO₂ in heterogeneous photocatalysis

et al. 2020

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Photocatalysis Enhanced by External Fields

Tian

et al. 2021

Angewandte Chemie

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The efficient conversion of solar energy by means of photocatalysis shows huge potential to relieve the ongoing energy crisis and increasing environmental pollution. However, unsatisfactory conversion efficiency still hinders its practical application. The introduction of external fields can remarkably enhance the photocatalytic performance of semiconductors from the inside out. This review focuses on recent advances in the application of diverse external fields, including microwaves, mechanical stress, temperature gradient, electric field, magnetic field, and coupled fields, to boost photocatalytic reactions, for applications in, for example, contaminant degradation, water splitting, CO2 reduction, and bacterial inactivation. The relevant reinforcement mechanisms of photoabsorption, the transport and separation of photoinduced charges, and adsorption of reagents by the external fields are highlighted. Finally, the challenges and outlook for the development of external‐field‐enhanced photocatalysis are presented.

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Photocatalysis Enhanced by External Fields

et al. 2021

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Degradation of 4-chloro 2-aminophenol using combined approaches based on microwave and photocatalysis

Cited by 25 publications

References 43 publications

New aluminum mesh from recyclable material for immobilization of TiO₂ in heterogeneous photocatalysis

New aluminum mesh from recyclable material for immobilization of TiO₂ in heterogeneous photocatalysis

Photocatalysis Enhanced by External Fields

Photocatalysis Enhanced by External Fields

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Degradation of 4-chloro 2-aminophenol using combined approaches based on microwave and photocatalysis

Cited by 25 publications

References 43 publications

New aluminum mesh from recyclable material for immobilization of TiO2 in heterogeneous photocatalysis

New aluminum mesh from recyclable material for immobilization of TiO2 in heterogeneous photocatalysis

Photocatalysis Enhanced by External Fields

Photocatalysis Enhanced by External Fields

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Product

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New aluminum mesh from recyclable material for immobilization of TiO₂ in heterogeneous photocatalysis

New aluminum mesh from recyclable material for immobilization of TiO₂ in heterogeneous photocatalysis