A pH-mediated enhancement of the graphene carbocatalyst activity for the reduction of 4-nitrophenol

Hu, Huawen; Wang, Xiaowen; Miao, Dagang; Wang, Yuanfeng; Lai, Chuilin; Guo, Yujuan; Wang, Wenyi; Xin, John Haozhong; Hu, Hong

doi:10.1039/c5cc05826k

Cited by 49 publications

(20 citation statements)

References 30 publications

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“…S10 ) and FTIR ( Fig. S11 ), which is good line with the GO structure as reported elsewhere 13 39 40 . The oxygen groups of the GO sheets ( Figs S10 and S11, SI ) are also likely to have an interaction with the hydrophilic blocks of mPEG-PCL-mPEG, which may exert an disruption impact on the hydrophilic and hydrophobic balance between mPEG and PCL blocks, despite the fact that the FTIR spectra of all these samples ( i.e.…”

Section: Resultssupporting

confidence: 89%

“…This article for the first time explores the feasibility of using graphene oxide (GO), a popular carbon material in various scientific disciplines including biomedicine 7 10 11 12 13 14 , etc. to make an amphiphilic copolymer, poly (ethylene glycol) methyl ether (mPEG)-poly(ε-caprolactone) (PCL)-mPEG, highly UV light-sensitive, which leads to the generation of a new smart nanocomposite material promising potential biomedical applications.…”

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confidence: 99%

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Graphene oxide-enhanced sol-gel transition sensitivity and drug release performance of an amphiphilic copolymer-based nanocomposite

Wang

Lee

et al. 2016

Sci Rep

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We report the fabrication of a highly sensitive amphiphilic copolymer-based nanocomposite incorporating with graphene oxide (GO), which exhibited a low-intensity UV light-triggered sol-gel transition. Non-cytotoxicity was observed for the composite gels after the GO incorporation. Of particular interest were the microchannels that were formed spontaneously within the GO-incorporated UV-gel, which expedited sustained drug release. Therefore, the present highly UV-sensitive, non-cytotoxic amphiphilic copolymer-based composites is expected to provide enhanced photothermal therapy and chemotherapy by means of GO’s unique photothermal properties, as well as through efficient passive targeting resulting from the sol-gel transition characteristic of the copolymer-based system with improved sensitivity, which thus promises the enhanced treatment of patients with cancer and other diseases.

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Section: Resultssupporting

confidence: 89%

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confidence: 99%

Graphene oxide-enhanced sol-gel transition sensitivity and drug release performance of an amphiphilic copolymer-based nanocomposite

Wang

Lee

et al. 2016

Sci Rep

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“…Increasing worldwide concern regarding environmental pollution has inspired researchers to explore high-performance functional materials to remediate the contaminated global environment, especially aquatic systems that have a key impact on human life and food supply [1,2,3,4,5,6,7,8,9,10,11,12]. Various kinds of functional materials have thus been reported for achieving environmental remediation [3,4,13,14,15,16,17,18,19,20,21].…”

Section: Introductionmentioning

confidence: 99%

Functionalization of Molecularly Imprinted Polymer Microspheres for the Highly Selective Removal of Contaminants from Aqueous Solutions and the Analysis of Food-Grade Fish Samples

Liang

Zhong

et al. 2018

Polymers

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The proliferation of pollution in aquatic environments has become a growing concernand calls for the development of novel adsorbents capable of selectively removing notorious andrecalcitrant pollutants from these ecosystems. Herein, a general strategy was developed for thesynthesis and functionalization of molecularly imprinted polymer microspheres (MIPs) that couldbe optimized to possess a significant adsorption selectivity to an organic pollutant in aqueousmedia, in addition to a high adsorption capacity. Considering that the molecular imprinting alonewas far from satisfactory to produce a high-performance MIPs-based adsorbent, further structuralengineering and surface functionalization were performed in this study. Although the more carboxylgroups on the surfaces of the MIPs enhanced the adsorption rate and capacity toward an organicpollutant through electrostatic interactions, they did not strengthen the adsorption selectivity in aproportional manner. Through a systematic study, the optimized sample exhibiting both impressiveselectivity and capacity for the adsorption of the organic pollutant was found to possess a smallparticle size, a high specific surface area, a large total pore volume, and an appropriate amount ofsurface carboxyl groups. While the pseudo-second-order kinetic model was found to better describethe process of the adsorption onto the surface of MIPs as compared to the pseudo-first-order kineticmodel, neither Langmuir nor Freundlich isothermal model could be used to well fit the isothermaladsorption data. Increased temperature facilitated the adsorption of the organic pollutant onto theMIPs, as an endothermic process. Furthermore, the optimized MIPs were also successfully employedas a stationary phase for the fabrication of a molecularly imprinted solid phase extraction column,with which purchased food-grade fish samples were effectively examined.

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“…For instance, nanotitania can be used to seal aluminum oxide for corrosion resistance and UV-protection by virtue of the commonly-known physiochemical stability and UVshielding performance of the nanotitania [42,43]. However, it remains a great challenge to use nanotitania as a hole sealing material for AAO film [23][24][25][26][27][28][29][30][31][32][33][34] This study aims to grow a layer of nanotitania film for the purpose of sealing the holes of the AAO film on the aluminum alloy.…”

Section: Introductionmentioning

confidence: 99%

“…A large number of methods have been employed to prepare the titania film primarily based on the vapor phase, liquid phase, solgel, precipitation, and electrical deposition [21,22,[25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43]. In this study, an anodic oxidation method was adopted for deposition of nanotitania under alternating voltage conditions, leading to the generation of a composite film.…”

Section: Introductionmentioning

confidence: 99%

Sealing Holes of an Anodic Aluminum Oxide Alloy by Nanotitania for Enhanced Corrosion Resistance

Chang¹,

Wei²,

Chen³

et al. 2017

Nano Res Appl

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This study aims to explore an effective, novel, and environmentally friendly method that overcomes the limitations and shortcomings existing in the traditional approaches for sealing holes on aluminum alloy. Herein, the holesealing treatment of an Anodic Aluminum Oxide (AAO) alloy film using two types of titanium sources with a high stability in aqueous electrolytes, that is, ammonium fluorotitanate and titanium potassium oxalate, to electrically deposit nanotitania on the film surface was investigated. The nanotitania deposited electrochemically for hole sealing has the advantages of the high physiochemical stability, low cost, and non-toxicity, which can thus readily improve the corrosion resistance of the sealed AAO in an environmentally friendly manner. Such sealed AAO can also result in a UV-shielding performance due to the commonly-known UV absorption properties of nanotitania. The hole sealing effect is also compared between the two systems involving the two types of titanium sources at different concentrations, voltages and time. The optimization of the preparation conditions is achieved by means of weight loss measurements. Potentiodynamic scan and electrochemical impedance spectroscopy results reveal that the hole-sealed sample-based on ammonium fluorotitanate shows a higher corrosion resistance as compared to the one based on titanium potassium oxalate. Significantly, the optimal conditions for the hole sealing of the aluminum alloy are evidenced to be the concentration of ammonium fluorotitanate of 0.1 mol/L, AC voltage of 3 V, and time of 900 s.

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A pH-mediated enhancement of the graphene carbocatalyst activity for the reduction of 4-nitrophenol

Cited by 49 publications

References 30 publications

Graphene oxide-enhanced sol-gel transition sensitivity and drug release performance of an amphiphilic copolymer-based nanocomposite

Graphene oxide-enhanced sol-gel transition sensitivity and drug release performance of an amphiphilic copolymer-based nanocomposite

Functionalization of Molecularly Imprinted Polymer Microspheres for the Highly Selective Removal of Contaminants from Aqueous Solutions and the Analysis of Food-Grade Fish Samples

Sealing Holes of an Anodic Aluminum Oxide Alloy by Nanotitania for Enhanced Corrosion Resistance

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