Preparation of a hydroxyethyl–titanium dioxide–carboxymethyl cellulose hydrogel cage and its effect on the removal of methylene blue

Abstract

A novel TiO 2 hydrogel cage model was built for the removal of methylene blue (MB), an organic pollutant. This TiO 2 hydrogel cage was prepared with the biomass materials of hydroxyethyl cellulose (HEC) and carboxymethyl cellulose (CMC), and this hydrogel cage structure was characterized by scanning electron microscopy, transmission electron microscopy, and X-ray diffraction. The contents of the encased TiO 2 and its swelling properties with different CMC proportions of this hydrogel cage were studied to obtain a suitable crosslinking network structure and optimal synthesis conditions. Compared to an equivalent amount of pure TiO 2 , the much higher removal efficiency of MB with our prepared TiO 2 hydrogel cage was attributed to the synergistic effect of the photocatalytic degradation for TiO 2 and the adsorption enrichment for cellulose hydrogels. Furthermore, the adsorption kinetics of the intraparticle diffusion model were used to study the adsorption enrichment process of the TiO 2 hydrogel cage. In addition, on the basis of the results of photocatalytic degradation and recycling experiments, excellent performances with respect to self-cleaning, regenerative ability, and easy recovery, were shown for this HEC-TiO 2 -CMC cage material, which demonstrated ideal application potential for MB removal.

Preparation of aerochitin‐TiO2 composite for efficient photocatalytic degradation of methylene blue

“…They showed over 82% degradation of MB (1. 6 mg/L, 50 mL) in 30 min for their material (100 mg) . Farzana and Meenakshi studied the photocatalytic degradation of MB using a chitosan–TiO 2 composite (CTC) and reported a MB (50 mg/L, 50 mL) degradation of over 93% for CTC (100 mg) in 60 min .…”

Preparation of cellulosic drug‐loaded hydrogel beads through electrostatic and host–guest interactions

“…The polymerization of CMC and HEC was carried out according to our previous work . The double network was crosslinked by EPI in liquid paraffin.…”

“…developed a novel double‐network hydrogel that had shape memory and self‐healing functionalities. In our previous research, a double‐network hydrogel cage structure prepared with CMC and HEC could provide surface carboxymethyl groups for immobilizing nanoparticles of TiO 2 . Predictably, the double‐network hydrogel crosslinked by HEC and CMC could also provide many electronegative binding sites, which have the ability to assemble some electropositive substances and exhibit additional functionalities .…”

Creating Stiff, Tough, and Functional Hydrogel Composites with Low‐Melting‐Point Alloys

“…This result shows that the capillary action is precisely controlled by the geometry of the channels. Possessing the ability to rapid transport fluid over a long distance by capillary force, these hydrogel fluidic devices can serve as fast and efficient molecular filters or chemical reactors …”