surface modification effects of graphite for selective

Identifying the Active Site of N

Herein, we developed a surface-modification method to identify the ortho-carbon atom of the pyridinic ring as the reactive site for ORR on N-doped graphene. The pyridinic ring of N-doped graphene was selectively grafted by an acetyl group at pyridinic N and ortho -C atoms by electrophilic and radical substitution, respectively.

Is graphene a promising nano

Graphene (G) provides a new kind of coating material that may confer the pro-osteodifferentiation capability on implants and scaffold materials by surface modification. Here, we review recent studies on the effects of graphene on surface modifications of implants or scaffold materials.

The Surface Modification of Graphite Particles by Direct

The dispersion stability of graphite particles in water was largely increased by a surface modification of direct fluorination. The fluorinated graphite particles in water did not flocculate and kept stable suspension for long time, and it was found that the surface of

Starch chemical modification for selective flotation of

2020/9/1Recently, Shrimali et al. (2018) showed that adsorbed corn starch polymer domains exhibited a cellular network on a graphite surface with a roughness of 1.6 nm, thickness of 7.2 nm and 60% surface coverage as demonstrated in Fig. 14.

Modifying graphite felt cathode by HNO3 or KOH to

Both HNO 3 and KOH modification methods successfully introduced OG groups on the surface of graphite felt. After being modified by HNO 3 or KOH, the hydrophily and specific surface area of GFs were enhanced, and both the H 2 O 2 production and the performance for Fe 2+ regeneration of modified GFs were improved obviously.

Selective Surface Modification of Polypropylene using

Such system was studied for the selective hydroxyl functionalization of polypropylene surface. The oxidation of polymer surfaces and the introduction of O‐containing functional groups by underwater plasma was found to exceed concentrations typically achieved in oxygen low‐pressure gas discharge plasmas up‐to two‐folds (maximal 56 O/100 C).

Oxidation of alkylarenes by modified graphite

2019/11/20Herein, an electrochemical method has been introduced and developed for the selective benzylic oxidation of alkylarenes. This work utilizes a simple redox mediator system, N-Hydroxyphthalimide (NHPI), with an inexpensive and innovatory modified graphite and nickel-based electrode using undivided cell setups to the selective oxidation of alkylarenes toward the aldehyde

Direct Electrochemical Synthesis of Graphene Oxide/Cobalt

2019/7/16The surface coverage of the CoO x NPs on the modified GO/PGE was found to be 3.03 10 −7 mol/cm 2 at a scan rate of 5 mV s −1. The role of the graphene layer on the pencil graphite electrode (PGE) is to provide an expanded surface area for the

Preparation of an Amperometric Glucose Biosensor on

Therefore, surface modification of electrode by a polymeric membrane is an ongoing research approach for improving the sensor's response. This paper describes a simple glucose biosensor fabricated by electropolymerization of aniline on graphite substrate and potentiostatic immobilization of GOx onto the PANI film on the graphite surface.

Silver nanoparticles/poly(L

2021/4/1Cold is one of the diseases that annually annoys a large number of people in the world. Cough and sore throat are the common symptoms of the cold that can be diminished by various medications. Guaifenesin (GF) named 3-(2-methoxyphenoxy)-propane-1,2-diol is known as an expectorant medicine that has been used to treat the symptoms of coughs caused by cold and mild upper respiratory tract

Surface modification of biomaterials with proteins

Function The function of surface modification is to change the physical and chemical properties of surfaces to improve the functionality of the original material. Protein surface modification of various types biomaterials (ceramics, polymers, metals, composites) is performed to ultimately increase biocompatibility of the material and interact as a bioactive material for specific applications.

Surface modification effects on defect

We investigated the effects of surface modification on the defect-related photoluminescence (PL) band in colloidal CdS quantum dots (QDs). A size-selective photoetching process and a surface modification technique with a Cd(OH)2 layer enabled the preparation of

Minerals

In flotation, the depressing effect of MF on graphite was achieved by transforming the surface of graphite particles from hydrophobic to hydrophilic, and then the graphite cannot float. The adsorption of MF onto sericite surface also improves its hydrophilicity, and the pre-adsorption of MF interferes with the adsorption of dodecylamine onto sericite surface [ 27 ].

Bulk Modification of Carbon Paste Electrode with Bi 2 O 3

Read Bulk Modification of Carbon Paste Electrode with Bi 2 O 3 Nanoparticles and Its Application as an Electrochemical Sensor for Selective Sensing of Anti HIV Drug Nevirapine, Electroanalysis on DeepDyve, the largest online rental service for scholarly

(PDF) Surface

The surface modification techniques employed in this study emphasize introduction of hydrophilic groups on graphite nanomaterials to facilitate their dispersion in aqueous media. These include: (i) polymer wrapping of oxidized carbon nanofiber; and (ii) covalent attachment of functional groups.

Surface modification effects of graphite for selective

Surface modification effects of graphite and organic solvents on Ti were investigated by thermogravimetry (TG), Raman spectroscopy, and transmission electron microscopy (TEM) observations to improve its hydrogen absorption properties. As a result, Ti ball-milled

Bulk Modification of Carbon Paste Electrode with Bi 2 O 3

Read Bulk Modification of Carbon Paste Electrode with Bi 2 O 3 Nanoparticles and Its Application as an Electrochemical Sensor for Selective Sensing of Anti HIV Drug Nevirapine, Electroanalysis on DeepDyve, the largest online rental service for scholarly

A comparison between physically and chemically driven

2010/4/15STM images evidencing the modification of a graphite surface subjected to DBD air plasma. Isolated atomic-scale defects with increasing concentration are noticed in (a) through (c). When the defect density reaches a certain point, the defects are no longer individually resolved and a uniformly rough morphology appears, as in (d).

Effect of Ammonium Bicarbonate on Intercalation and

Figure 3 shows the X-ray diffraction patterns of EG in three stages, where the peak corresponding to graphite-2 h can also be clearly seen. of the (002) crystal face is 26.161, and the value is 3.4035. After ammonium bicarbonate being inserted, of the (002) crystal surface reduces to 26.009 and the value increases to 3.4230.

Surface modification of biomaterials with proteins

Function The function of surface modification is to change the physical and chemical properties of surfaces to improve the functionality of the original material. Protein surface modification of various types biomaterials (ceramics, polymers, metals, composites) is performed to ultimately increase biocompatibility of the material and interact as a bioactive material for specific applications.

Minerals

Efficient beneficiation of microcrystalline graphite remains a challenge. Selective recovery of microcrystalline graphite from quartz using hydrophobized magnetite as magnetic seed is studied in this work. Magnetite was hydrophobized by the surface coating of sodium oleate. The hydrophobic agglomerates were then separated by magnetic separation. Sedimentation experiments were

Study of the Graphite Electrode Surface with In and Pt

Abstract: Electrolytic deposit of indium, platinum and platinum-indium alloy on the surface of graphite electrodes has been studied using the scanning electron microscopy and the stripping voltammetry. [1] N. A. Kolpakova, N.V. Borisova, V.A. Nevostruev, Nature positive anodic peak current on the current-voltage curve in the stripping voltammetry binary systems platinum metal, J of Anal Chem

Modifying graphite felt cathode by HNO3 or KOH to

Both HNO 3 and KOH modification methods successfully introduced OG groups on the surface of graphite felt. After being modified by HNO 3 or KOH, the hydrophily and specific surface area of GFs were enhanced, and both the H 2 O 2 production and the performance for Fe 2+ regeneration of modified GFs were improved obviously.

EFFECTS OF SURFACE STATES, DEFECTS AND

We also explored the effects of surface states on the magnetic behavior of nanoscale ZnO through detailed calculations. In the case of grapheme, we have observed new combination modes in the range from 1650 to 2300 cm−1 in single-(SLG), bi-, few-layer and incommensurate bilayer graphene (IBLG) on silicon dioxide substrates.

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