Tuning the photonic properties of graphene oxide suspensions with nanostructured additives

Nanoscale ◽  
2021 ◽  
Author(s):  
Yi-Tao Xu ◽  
Urmi Vijay Mody ◽  
Mark J. MacLachlan
Keyword(s):  
Graphene Oxide ◽  
Cellulose Nanocrystals ◽  
Temperature Sensitive ◽  
Depletion Interaction

Colloidal additives such as clay nanoplates and cellulose nanocrystals induce the ordering formation of graphene oxide via depletion interaction for hybrid photonic suspensions with temperature-sensitive properties.

Manipulating the Assembly of the CNC/RGO Composite Film for Superior Electromagnetic Interference Shielding Properties

2021 ◽  
Author(s):  
kexia Jin ◽  
Jianxiong Xing ◽  
Xinge Liu ◽  
Zehui Jiang ◽  
Shumin Yang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Cellulose Nanocrystals ◽  
Electromagnetic Interference ◽  
Practical Application ◽  
Emi Shielding ◽  
Electromagnetic Interference Shielding ◽  
High Mechanical Strength ◽  
Dispersing Agent ◽  
Reduced Graphene ◽  
Shielding Properties

To achieve high mechanical strength electromagnetic interference (EMI) shielding materials for practical application, cellulose nanocrystals (CNC) as a reinforcing and dispersing agent, are intercalated into reduced graphene oxide (RGO) layers,...

scholarly journals Reduced Graphene Oxide-Based Double Network Polymeric Hydrogels for Pressure and Temperature Sensing

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 3162 ◽  
Author(s):  
Wei Liu ◽  
Xiaoyuan Zhang ◽  
Gang Wei ◽  
Zhiqiang Su
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Mechanical Deformation ◽  
Temperature Sensors ◽  
Carboxymethyl Chitosan ◽  
Temperature Sensitive ◽  
Facile Synthesis ◽  
Bending Properties ◽  
Double Network ◽  
Reduced Graphene

We demonstrate the fabrication of novel reduced graphene oxide (rGO)-based double network (DN) hydrogels through the polymerization of poly(N-isopropylacrylamide) (PNIPAm) and carboxymethyl chitosan (CMC). The facile synthesis of DN hydrogels includes the reduction of graphene oxide (GO) by CMC, and the subsequent polymerization of PNIPAm. The presence of rGO in the fabricated PNIPAm/CMC/rGO DN hydrogels enhances the compressibility and flexibility of hydrogels with respect to pure PNIPAm hydrogels, and they exhibit favorable thermoresponsivity, compressibility, and conductivity. The created hydrogels can be continuously cyclically compressed and have excellent bending properties. Furthermore, it was found that the hydrogels are pressure- and temperature-sensitive, and can be applied to the design of both pressure and temperature sensors to detect mechanical deformation and to measure temperature. Our preliminary results suggest that these rGO-based DN hydrogels exhibit a high potential for the fabrication of soft robotics and artificially intelligent skin-like devices.

Extraction of Cellulose Nanocrystals with Structure I and II and Their Applications for Reduction of Graphene Oxide and Nanocomposite Elaboration

2018 ◽  
Vol 10 (7) ◽  
pp. 1913-1927 ◽  
Author(s):  
Faouzia Khili ◽  
Joao Borges ◽  
Pedro L. Almeida ◽  
Rabah Boukherroub ◽  
Amel Dakhlaoui Omrani
Keyword(s):  
Graphene Oxide ◽  
Cellulose Nanocrystals

scholarly journals Cellulose nanocrystals/graphene oxide composite for the adsorption and removal of levofloxacin hydrochloride antibiotic from aqueous solution

2020 ◽  
Vol 7 (10) ◽  
pp. 200857 ◽  
Author(s):  
Junhong Tao ◽  
Jie Yang ◽  
Chengxiao Ma ◽  
Junfeng Li ◽  
Keqing Du ◽  
...  
Keyword(s):  
Composite Material ◽  
Graphene Oxide ◽  
Adsorption Capacity ◽  
Cellulose Nanocrystals ◽  
Photoelectron Spectroscopy ◽  
High Surface ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Three Dimensional Structure ◽  
Oxide Composite

Residual antibiotics in water are often persistent organic pollutants. The purpose of this study was to prepare a cellulose nanocrystals/graphene oxide composite (CNCs-GO) with a three-dimensional structure for the removal of the antibiotic levofloxacin hydrochloride (Levo-HCl) in water by adsorption. The scanning electron microscope, Fourier transform infrared (FT-IR), energy-dispersive spectroscopy, X-ray photoelectron spectroscopy and other characterization methods were used to study the physical structure and chemical properties of the CNCs-GO. The three-dimensional structure of the composite material rendered a high surface area and electrostatic attraction, resulting in increased adsorption capacity of the CNCs-GO for Levo-HCl. Based on the Box–Behnken design, the effects of different factors on the removal of Levo-HCl by the CNCs-GO were explored. The composite material exhibited good antibiotic adsorption capacity, with a removal percentage exceeding 80.1% at an optimal pH of 4, the adsorbent dosage of 1.0 g l −1 , initial pollutant concentration of 10.0 mg l −1 and contact time of 4 h. The adsorption isotherm was well fitted by the Sips model, and kinetics studies demonstrated that the adsorption process conformed to a quasi-second-order kinetics model. Consequently, the as-synthesized CNCs-GO demonstrates good potential for the effective removal of antibiotics such as levofloxacin hydrochloride from aqueous media.

scholarly journals Light-controllable polymeric material based on temperature-sensitive hydrogels with incorporated graphene oxide (Phys. Status Solidi A 6∕2015)

2015 ◽  
Vol 212 (6) ◽  
pp. n/a-n/a
Author(s):  
L. Breuer ◽  
M. Raue ◽  
M. Kirschbaum ◽  
T. Mang ◽  
M. J. Schöning ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Polymeric Material ◽  
Temperature Sensitive

scholarly journals Graphene Oxide and Polyethyleneimine Cooperative Construct Ionic Imprinted Cellulose Nanocrystals Aerogel for Selective Adsorption of Dy(III)

2021 ◽  
Author(s):  
Xudong Zheng ◽  
Wen Sun ◽  
Ang Li ◽  
Bin Wang ◽  
Rong Jiang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Rare Earth ◽  
Cellulose Nanocrystals ◽  
Selective Adsorption ◽  
Chemical Properties ◽  
Regeneration Ability ◽  
Maximum Adsorption Capacity ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
And Chemical Properties

Abstract Because of dysprosium's unique physical and chemical properties and limited supply, the price of rare earth dysprosium has been high in recent years. Therefore, the study of the method of high efficiency selective separation of dysprosium has the double value of scientific research and practical economy. In this paper, we used periodic cellulose nanocrystals as the basic structure, polyethylenimine and graphene oxide were introduced, combined with imprinting technology, to construct porous imprinted aerogel and use it for selective adsorption of Dy(III). The physical and chemical properties were characterized by SEM, TEM, FT-IR and TGA. It was proved that both polyethylenimine and graphene oxide were crosslinked effectively with cellulose nanocrystals. Adsorption experiments showed that the composite imprinted aerogel could selectively adsorb dysprosium effectively, and the maximum adsorption capacity for Dy(III) was 36.495 mg g− 1. The reproducibility experiment showed that aerogel had good regeneration ability. In conclusion, cellulose nanocrystals aerogel, which is environmentally friendly, efficient and repeatable, is expected to provide a new direction for the recovery of rare earth elements.

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