Versatile nanocellulose-anatase TiO2 hybrid nanoparticles in Pickering emulsions for the photocatalytic degradation of organic and aqueous dyes

Recent advances in the design and use of Pickering emulsions for wastewater treatment applications

“…Pickering emulsions have become ideal candidates for wastewater treatment owing to their many attractive features, such as remarkable stability, tunability, low cost, low toxicity, easy recovery, and high performance due to high interfacial surface areas. 37,38,98,110,111 Various methods based on Pickering emulsions have been developed for removing contaminants from wastewater, including adsorption, photocatalytic oxidation, precipitation, coagulation/flocculation, chemical oxidation, biological processing, or membrane filtration. The adsorption processes were found to be a special case where the most potent techniques rely on the indirect use of Pickering emulsions yielding high performance functional adsorbents.…”

Recent Development and Environmental Applications of Nanocellulose-Based Membranes

“…The construction of a TiO 2 -based composite would be beneficial to achieve better photocatalytic performance [ 18 ]. Voisin et al, (2021) [ 113 ] reported the fabrication of CNC–TiO 2 hybrids with an improvement in photocatalytic properties in suspension compared to the as-prepared control anatase TiO 2 owing to a better dispersibility and colloidal stability. CNC’s interfacial properties were also preserved, enabling organic dye degradation in Pickering emulsions.…”

Biocompatible Nanoparticle Heteroaggregates as Stabilizers of Pickering Emulsions for Vitamin D3 Efficient Delivery

“…A recently proposed approach to cellulose nanocrystal (CNC) surface charge reduction via the addition of oppositely charged colloids lacks these disadvantages . As we have shown previously, when one adds positively charged nanoparticles (TiO 2 , Al 2 O 3 , ferric oxides) to negatively charged CNC, heterocoagulation proceeds according to the mechanism of “charge neutralization–charge reversal”. − Heterocoagulation helps lower ζ-potential values and adds some properties to initial polysaccharide nanocrystals, e.g., magnetic, photocatalytic, adsorptive, etc. , Recent papers on Pickering emulsions showed that stabilization by hybrid organic–inorganic is highly prospective and can add photocatalytic properties to emulsions and make them redispersible after drying . To develop emulsion-based drug delivery systems, it is necessary to use biocompatible nanoparticles.…”

“…9−11 Heterocoagulation helps lower ζpotential values and adds some properties to initial polysaccharide nanocrystals, e.g., magnetic, photocatalytic, adsorptive, etc. 12,13 Recent papers on Pickering emulsions showed that stabilization by hybrid organic−inorganic is highly prospective and can add photocatalytic properties to emulsions 14 and make them redispersible after drying. 15 To develop emulsion-based drug delivery systems, it is necessary to use biocompatible nanoparticles.…”