Surface Modification on Cellulose Nanofibers by TiO2 Coating for Achieving High Capture Efficiency of Nanoparticles

Abstract

Cellulose nanofibers were modified by TiO2 gel layer (~25 nm in thickness) via hydrolysis reaction on the surface of the cellulose nanofibers. After the TiO2 coating, the surface charge of the nanofiber dramatically changed from negative to positive. A high efficiency (~100%) of capturing negatively charged Au nanoparticles (5 nm) was successfully obtained by effectively utilizing the electrostatic interaction of surface charge between the TiO2-coated cellulose nanofibers and Au nanoparticles. Therefore, this technique of surface modification will be potentially used in improving filtration efficiency for membrane applications.

Preparation and characterization of lignin-TiO2 UV-shielding composite material by induced synthesis with nanofibrillated cellulose

“…As demonstrated in the XRD patterns, some XRD peaks of the composite materials were still identifiable by referring to JCPDS No. 21-1272 due to the low crystallinity of the NFC (Zhang et al 2019). Since lignin is amorphous in nature and lacks ordered structure, the XRD diffractograms of both composites did not show any diffraction peak and that can be referred to lignin, and no other crystalline by-products are formed even after the formation of lignin-TiO2@NFC composite (Ibrahim et al 2019).…”

Synthesis of bimetallic Co–Pt/cellulose nanocomposites for catalytic reduction of p-nitrophenol

“…38 However, the peak responsible for the asymmetric stretching vibration of C–O–C arising from the – glucosidic linkage in a cellulose chain was observed not only in CANFs but also in CNFs and Co–Pt/CNFs and is present at 1016.2 cm −1 . 39 The FTIR spectrum of the Co–Pt/CNF catalyst and CNFs are found to be similar in terms of the presence of characteristic peaks belonging to cellulose; this indicates the proper distribution of Co and Pt NPs over the CNF surface without changing the original nature of CNFs.…”

Preparation and characterization of nanocellulose coating modified by titanium dioxide

“…1c), aside from two peaks at 423 cm -1 and 647 cm -1 , which are the characteristic absorbance peaks of TiO2 (Fig. 1a) (Zhang et al 2019). These results indicate that TiO2 successfully was loaded on CNWs, but the addition of TiO2 caused no significant chemical reaction with CNWs.…”