Pervaporation of isopropanol–water mixtures through polyion complex membranes

Dhanuja, G.; Smitha, B.; Sridhar, S.

doi:10.1016/j.seppur.2005.01.001

Cited by 37 publications

(20 citation statements)

References 16 publications

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“…However, the formation of TiO 2 particles dramatically interfered with the ordered packing of polymer chains by both steric effect and hydrogen bonds between CS and TiO 2 , leading to the decrease in CS crystallinity. The absence of the peak at 11.2 • suggested that a large number of hydrogen bonds formed between -NH 2 and -OH in the CS chain were destroyed (Dhanuja et al, 2004). Introduction of TiO 2 particles into CS structures should lower the crystallinity of membranes and increase the flexibility of polymer chains.…”

Section: Structure Of Cs/tio 2 Hybrid Membranesmentioning

confidence: 99%

Chitosan/TiO2 nanocomposite pervaporation membranes for ethanol dehydration

Yang

Jiang

et al. 2009

Chemical Engineering Science

176

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Section: Structure Of Cs/tio 2 Hybrid Membranesmentioning

confidence: 99%

Chitosan/TiO2 nanocomposite pervaporation membranes for ethanol dehydration

Yang

Jiang

et al. 2009

Chemical Engineering Science

176

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“…Although the crystal form of pure chitosan displayed the major crystalline peak at 20.238, no evident peak between 208 and 308 was observed in the XRD pattern of CTA, which revealed that TiO 2 particles dramatically interfered with the polymer chains between chitosan and TiO 2 . Besides, the new absence of the peak at 12.958 confirmed that a large number of hydrogen bonds formed between -NH 2 and -OH in the chitosan were destroyed [18]. And therefore, the introduction of TiO 2 nanoparticles into chitosan could lower the crystallinity of CTA and increase the flexibility of polymer chains.…”

Section: Characterization Of Ctamentioning

confidence: 95%

Simultaneous removal of metal ions and methyl orange by combined selective adsorption and photocatalysis

Zhao¹,

Li²,

Zhang³

et al. 2010

Env Prog and Sustain Energy

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The technology of the selective biosorption and photocatalysis were coupled to synthesize a double functional Chitosan-TiO 2 adsorbent (CTA). CTA can not only degrade organic pollutants but also adsorb metal ions simultaneously. It was interesting that the photocatalysis of CTA for methyl orange (MO) was promoted when MO was coexisted with metal ions. In the presence of Ni 21 , the degradation ratio of MO gradually increased from 78.9 to 94.2% with the increasing of Ni 21 concentration from 50 to 150 mg L 21 ; furthermore with the presence of Ag 1 , the degradation ratio for MO increased from 65.9 to 79.3%. At the same time the existence of MO had no obvious effect on the adsorption ability for metal ions. CTA can be reused more than 10 batches without losing its adsorption and degradation ability. XPS showed the binding energy of Ni 21 increased with Ni 21 initial concentration growing in a particular range. Higher binding energy of Ni will result in stronger OH• formation, so it has a positive influence on the photocatalysis of CTA. Scanning electron microscope (SEM) revealed that silver nanoparticles were found on the surface of CTA and in the solution of MO and Ag 1 , and the silver nanoparticles had promoter action on the degradation for MO. The results showed that the technology of biosorption and photocatalysis were synergistic when they were applied to the system of binary pollutants containing metal ions and MO.

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“…Sridhar et al [104] and Jiang et al [105] also prepared CS-PAA BPECM in a similar method, and studied their performances in dehydrating isopropanol and ethyl glycol, respectively. Sridhar et al pointed out that the ionic complexation interaction between CS and PAA chains broke the hydrogen bond interactions inside CS chains.…”

Section: Blend Pec Membranes For Pervaporationmentioning

confidence: 99%