Sonophotocatalytic Degradation of Chitosan in the Presence of Fe(III)/H2O2 System

Taghizadeh, Mohammad Taghi; Abdollahi, Reza; Orang, Naser Sadeghpour

doi:10.1007/s10924-011-0409-y

Cited by 10 publications

(6 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Authors compared the effects of sonocatalysis (24 kHz, 30-90 W) and photocatalysis (8 WU V lamp, 254 nm) in the presence of TiO 2 particles (0.1t o 0.6 gL À1 ). [70,71] The work reported the kineticso fd egradation of chitosana nd depending on the operating parameters used, as ynergistic effect between US, UV and Fentonr eagent (iron salt) was clearly demonstrated. Interestingly,t he authors showedt he cleavage of b-glycosidic linkages under sonophotochemical conditions, without the formation of carboxylic groups.I ndeed, the initial chitosan monomeric structures till existed in the degraded chitosan showing decreased molecular weight.…”

Section: Sonophotocatalysis:acombination Essentially Used As An Advanmentioning

confidence: 99%

“…on the treatment of chitosan (Figure ). Authors compared the effects of sonocatalysis (24 kHz, 30–90 W) and photocatalysis (8 W UV lamp, 254 nm) in the presence of TiO 2 particles (0.1 to 0.6 g L −1 ) . The work reported the kinetics of degradation of chitosan and depending on the operating parameters used, a synergistic effect between US, UV and Fenton reagent (iron salt) was clearly demonstrated.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Combined Approach using Sonochemistry and Photocatalysis: How to Apply Sonophotocatalysis for Biomass Conversion?

et al. 2017

View full text Add to dashboard Cite

The innovative combination of sonochemistry (power ultrasound) and photocatalysis (UV light) has been extensively investigated in the literature, especially as an advanced oxidation process. Based on these results but with a completely different strategy, the sonophotocatalysis starts to be applied to organic reactions and could represent an innovative way to valorize biomass into fuels or platform molecules. This article discusses this opportunity and proposes some trends and outlooks for further researches in the area.

show abstract

Section: Sonophotocatalysis:acombination Essentially Used As An Advanmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Combined Approach using Sonochemistry and Photocatalysis: How to Apply Sonophotocatalysis for Biomass Conversion?

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The reaction rate constants for applied degradation methods (sonocatalytic and sonophotocatalytic) are summarized in Table 2. Combination of ultrasound and photolysis resulted in better efficacy as compared to the individual operations and the rate of degradation does not appear to slow down with time of treatment [45]. In previous works, Gogate et el.…”

Section: Sonophotocatalytic (Us + Uv + Tio 2 ) Degradation Of Carragementioning

confidence: 82%

Influence of Different Degradation Techniques on the Molecular Weight Distribution of κ -Carrageenan

Taghizadeh¹,

Abdollahi²

2015

ijbb

Self Cite

View full text Add to dashboard Cite

Carrageenan as an abundant natural carbohydrate could be used as a representative material instead of synthetic polymers. In this work, the degradation of κ-Carrageenan by means of ultrasound irradiation at a frequency of 24 kHz and its combination with heterogeneous Titanium dioxide, followed by a photocatalytic process was investigated. The scission of carrageenan chains induced by a high intensity field of ultrasonic irradiation; result in various molecular weights of carrageenan. The low molecular weight species of carrageenan have biological and pharmaceutical uses that only should be obtained from the degradation method. The ultrasound power not only led to enhanced turbulence and liquid streaming, but also increased the active surface area. Therefore, TiO 2 sonophotocatalysis was carried out faster than sonolysis and sonocatalysis processes. The influence of the basic operational parameters such as, ultrasound power and amount of TiO 2 on the degradation rate of carrageenan was also studied. The results revealed that the extent of sonolytic degradation was increased with increasing of ultrasound power (in the range 30-80 W) and at higher catalyst concentration, the degradation rate in the solution soared. The degraded carrageenans were characterized by gel permeation chromatography (GPC).

show abstract

“…Generally, the polymer crystallinity increases due to the destruction of its structure and functional groups after degradation. 28,29 We speculate that certain functional groups are destroyed and produced during the aging process of PEG2000.…”

Section: Resultsmentioning

confidence: 98%

Study on aging behavior of polyethylene glycol under three wavelengths of ultraviolet light irradiation

Shang,

Wei,

Zhou

et al. 2023

RSC Adv.

View full text Add to dashboard Cite

show abstract

Sonophotocatalytic Degradation of Chitosan in the Presence of Fe(III)/H2O2 System

Cited by 10 publications

References 39 publications

A Combined Approach using Sonochemistry and Photocatalysis: How to Apply Sonophotocatalysis for Biomass Conversion?

A Combined Approach using Sonochemistry and Photocatalysis: How to Apply Sonophotocatalysis for Biomass Conversion?

Influence of Different Degradation Techniques on the Molecular Weight Distribution of κ -Carrageenan

Study on aging behavior of polyethylene glycol under three wavelengths of ultraviolet light irradiation

Contact Info

Product

Resources

About