Microstructure‐Controllable Graphene Oxide Hydrogel Film Based on a pH‐Responsive Graphene Oxide Hydrogel

Abstract

A graphene oxide hydrogel (GOH) is fabricated via suspending the graphene oxide (GO) in water without any additional processing steps. At the hydrogel/air interface, a well‐defined hydrogel membrane forms once the solvent is removed by vacuum drying. The microstructure of the resulting GOH film can be tailored by different dehydration approaches, as well as by varying the GO concentration in the hydrogel. This GOH exhibited pH‐responsiveness and good mechanical properties. Meanwhile, the GOH presented good adsorption capacity to the organic dye rhodamine B and anionic chromate Cr2O72−. This GOH may find great potential in many fields, such as wastewater treatment, biodetection, etc.

Theranostic GO‐Based Nanohybrid for Tumor Induced Imaging and Potential Combinational Tumor Therapy

“…Figure 2 B showed that around 27% weight loss occurred for GO, which was mainly due to the thermal decomposition of oxygen-containing moieties on GO surface. [ 18 ] The thermal decomposition of PEI-PEG on GO surface accounted for the increased mass loss up to 64% for GO-PEI-PEG sample. The mass loss was further elevated to 74% in the case of GO-PEI(Peptide-DOX)-PEG.…”

“…[ 18 ] GO was conjugated to PEI-PEG by the formation of an amide bond between GO and PEI via EDC chemistry. Briefl y, GO (50 mg) was dispersed in distilled water (125 mL), to which an aqueous solution of the obtained PEI-PEG (624 mg, dissolved in 15 mL distilled water), EDC·HCl and NHS solution (0.11 mol/L, 7.5 mL) were added.…”

Recent Progress in Multifunctional Graphene Aerogels

“…It was mechanically strong, electrically conductive, thermally stable, and exhibited high specific capacitance. It could support 100 g of weight with little deformation and the corresponding GO concentration was lower (2 mg mL −1 ) than that (30 mg mL ) reported by Qin et al (2012) for direct gelation. The strong graphene skeleton is responsible for the greater mechanical strength than that exhibited by conventional hydrogels.…”

“…In addition, the critical gel concentration (CGC) is also an important factor for the gelation of GO suspensions. Qin et al reported CGC of GO was 30 mg/mL during the dispersion of GO by sonication (Qin et al, 2012). However, hydrogel was also formed even when the CGC of GO was 0.075-0.125 mg/mL -but the mechanical strength of the aerogel was weak.…”

A facile one-pot method to two kinds of graphene oxide-based hydrogels with broad-spectrum antimicrobial properties

“…In other words, these raw materials were not suitable for large-scale production. Since three-dimensional (3D) materials can be recycled easily, they have attracted tremendous attention in multidisciplinary research [15][16][17][18]. But, graphene oxide based 3D material has not yet been used in antibacterial fields.…”