Investigation of Intermediate Compounds of Phenol in Photocatalysis Process

Trinh, Dang Trung Tri; Le, Shukun; Channei, Duangdao; Khanitchaidecha, Wilawan; Nakaruk, Auppatham

doi:10.18178/ijcea.2016.7.4.588

Cited by 14 publications

(18 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This effect is attributed to the further degradation of phenolic compounds in other products, not detected with the TPC analysis, occurred during the light irradiation period. 55 Previous studies pointed out that photocatalysis exerts a strong oxidation action and so, the initial products can be further oxidized. 20,22,55 On the other hand, considering the experiments 1, 4, 7, 9, 10, where a medium and high concentration of catalyst was tested, an opposite effect of photocatalysis was observed (Table 2).…”

Section: Resultsmentioning

confidence: 99%

TiO₂–AgCl Based Nanoparticles for Photocatalytic Production of Phenolic Compounds from Lignocellulosic Residues

et al. 2018

View full text Add to dashboard Cite

Lignocellulosic biomass residues can be used as an interesting resource for the production of biochemicals or sustainable fuels. In this optic, lignin represents an interesting raw material for the production of chemicals, such as aromatic compounds, or fuels. This can contribute in moving away from petroleum-based industries to bio-based industries. The aim of this study was to investigate the application of a photocatalytic process using a commercial solution composed by TiO2 doped with AgCl for wheat straw valorization. The study investigated the effect of pH and catalyst concentrations for optimal phenolic compounds production. It was found that the photocatalytic treatment boosted the phenolic production from wheat straw. The efficiency of the process depended on the initial pH and catalyst concentration. Process optimization towards increased phenolic compounds production was performed. Catalyst concentration of 1 g/L and a treatment time of 1.56 hours in alkaline conditions resulted in the highest phenolics production. Use of the photocatalytic treated wheat straw for anaerobic digestion (AD) was also evaluated. Results showed that the AD microbiome is strongly inhibited by the presence of toxic compounds presented in the catalyst-straw solution and specifically, HNO3 was toxic to methanogenic communities. Hence, to succeed in an efficient biorefinery framework where total phenols and biogas production are combined, the usage of HNO3 for catalyst synthesis should be avoided.

show abstract

Section: Resultsmentioning

confidence: 99%

TiO₂–AgCl Based Nanoparticles for Photocatalytic Production of Phenolic Compounds from Lignocellulosic Residues

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Moreover, the results reported in Figure 5b show that 2ZnO/s-PS δ-form aerogel is also able to reduce the TOC after each cycle, always leading to a TOC removal of 86% after 180 min of UV irradiation. The small difference between the final values of phenol degradation and TOC removal was possibly due to the formation, during the degradation processes, of some intermediates, such as hydroquinone, benzoquinone and organic acids, some of which were not readily degradable [21,22,23].…”

Section: Resultsmentioning

confidence: 99%

Highly Robust and Selective System for Water Pollutants Removal: How to Transform a Traditional Photocatalyst into a Highly Robust and Selective System for Water Pollutants Removal

et al. 2019

View full text Add to dashboard Cite

Highly porous monolithic aerogels based on ZnO photocatalyst and syndiotactic polystyrene (s-PS) were obtained by supercritical CO2 treatment of ZnO/s-PS gels. The prepared aerogels were characterized and their photocatalytic activity was evaluated using phenol and toluene as water pollutant models. The s-PS nanoporous crystalline phase, able to absorb pollutant molecules, was proven to be necessary to ensure high photocatalytic efficiency as the aerogel acts not only as a support, but also as pollutant pre-concentrator. The reusability of ZnO/s-PS aerogels is also strong showing no decrease in photocatalytic activity after six consecutive degradation trials. Finally, the aerogel matrix prevents ZnO dissolution occurring under acidic conditions and promotes a selective removal of the pollutants. The synergy between the photocatalyst and the innovative polymeric support provides the composite system with robustness, chemical stability, easy recovery after treatment, high efficiency of pollutant removal with a marked selectivity which make these materials promising for large scale applications.

show abstract

“…In addition, Dang et al reported photocatalytic oxidation of phenol over TiO 2 photocatalyst. They found that aromatic pollutant phenol could be further degraded into other intermediate quinone rings such as ortho‐dihydroquinone, ortho‐benzoquinone, hydroxydydroquinone, and hydroxybenzoquinone by reaction withOH • .…”

Section: Resultsmentioning

confidence: 99%

Hybrid high‐porosity rice straw infused with BiVO₄ nanoparticles for efficient 2‐chlorophenol degradation

Channei

Nakaruk

Khanitchaidecha

et al. 2019

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

In this work, the coupling of BiVO4 nanoparticles with a highly porous material derived from rice straw (BiVO4/RS composites) and the photocatalytic degradation of 2‐chlorophenol (2‐CP) in an aqueous solution was studied. The results indicated that BiVO4/RS composites possessed a monoclinic structure. The morphologies of BiVO4/RS composites consisted of spherical shapes of BiVO4 particles coated on the RS adsorbent. The specific surface area of BiVO4 increased from 1.9024 to 31.1153 m2/g after coating with RS adsorbent. A shift occurred in adsorption edge from 510 to 525 nm, corresponding to a reduction in band gap energy from 2.43 to 2.35 eV. The change in the optical adsorption edge and band gap of BiVO4/RS composites may simultaneously result to the duplication of a structure caused by silicon species in rice straw, which was expected to be self‐doped into the BiVO4 crystal lattice during synthesis. The photocatalytic performance of 2‐chlorophenol under visible irradiation clearly showed that BiVO4/RS composites displayed the highest photocatalytic activities in comparison with other pure samples, which were 2 times higher than that of BiVO4.

show abstract

Investigation of Intermediate Compounds of Phenol in Photocatalysis Process

Cited by 14 publications

References 19 publications

TiO₂–AgCl Based Nanoparticles for Photocatalytic Production of Phenolic Compounds from Lignocellulosic Residues

TiO₂–AgCl Based Nanoparticles for Photocatalytic Production of Phenolic Compounds from Lignocellulosic Residues

Highly Robust and Selective System for Water Pollutants Removal: How to Transform a Traditional Photocatalyst into a Highly Robust and Selective System for Water Pollutants Removal

Hybrid high‐porosity rice straw infused with BiVO₄ nanoparticles for efficient 2‐chlorophenol degradation

Contact Info

Product

Resources

About

Investigation of Intermediate Compounds of Phenol in Photocatalysis Process

Cited by 14 publications

References 19 publications

TiO2–AgCl Based Nanoparticles for Photocatalytic Production of Phenolic Compounds from Lignocellulosic Residues

TiO2–AgCl Based Nanoparticles for Photocatalytic Production of Phenolic Compounds from Lignocellulosic Residues

Highly Robust and Selective System for Water Pollutants Removal: How to Transform a Traditional Photocatalyst into a Highly Robust and Selective System for Water Pollutants Removal

Hybrid high‐porosity rice straw infused with BiVO4 nanoparticles for efficient 2‐chlorophenol degradation

Contact Info

Product

Resources

About

TiO₂–AgCl Based Nanoparticles for Photocatalytic Production of Phenolic Compounds from Lignocellulosic Residues

TiO₂–AgCl Based Nanoparticles for Photocatalytic Production of Phenolic Compounds from Lignocellulosic Residues

Hybrid high‐porosity rice straw infused with BiVO₄ nanoparticles for efficient 2‐chlorophenol degradation