Presence Of Cetyltrimethylammonium Bromide Research Articles

Acidic-treated TS-1 zeolites with high titanium for cyclohexanone efficient oximation

Successful preparation of acidic-treated TS-1 zeolites with high titanium by hydrothermal synthesis in the presence of cetyltrimethylammonium bromide and tetrapropylammonium hydroxide as templates and followed by treatment with 1 M hydrochloric acid were reported in this paper. Many characterization techniques, including XRD, N2 adsorption-desorption, ICP, UV-vis, FT-IR, SEM, Raman, XPS and TEM, were applied to characterize their physical and chemical properties, and the cyclohexanone oximation was also conducted to investigate the catalytic performance. The results showed that although the crystalline TS-1 zeolite with high titanium can be obtained with double templates, the extra-framework TiOx would be formed based on the SEM images and UV-vis spectra. The MFI topological structure with the acidic treatment can be kept and all the titanium species can be almost incorporated into the framework of TS-1 zeolite, whose relative content for S-0.2-CTS-0.04-160 sample was about 96%. The S-0.2-CTS-0.04-160 sample with the skeleton titanium species as high as 3.38 mol.% resulting in more defects showed higher catalytic performance than other catalysts, whose cyclohexanone conversion of 97.6 % and caprolactam yield of 94.6 % can be obtained. Compared to classical TS-1 zeolite, the S-0.2-CTS-0.04-160 catalyst showed good stability with 89.8 % of cyclohexanone conversion and 84.9 % of caprolactam yield even though after repeated use for 5 times.

Assembly of trimetallic palladium-silver-copper nanosheets for efficient C2 alcohol electrooxidation

The synthesis of two-dimensional (2D) alloyed efficient electrocatalysts with several active sites has attracted considerable attention in recent years. In this work, trimetallic palladium-silver-copper (PdAgCu) nanosheet assemblies (NSAs) are synthesized in the presence of cetyltrimethylammonium bromide and molybdenum hexacarbonyl as the structure-directing agents. The morphologies and structures of the trimetallic PdAgCu NSAs are identified by high-angle annular dark-field scanning transmission electron microscopy, transmission electron microscopy, and X-ray diffraction. The trimetallic Pd6Ag3Cu2 NSA has high electrocatalytic performance with outstanding long-term stabilities for ethylene glycol oxidation reaction (EGOR = 5696 mA mgPd−1) and ethanol oxidation reaction (EOR = 4374 mA mgPd−1). The enhanced electrocatalytic activities can be attributed to the synergistic effects, including strain, ligand, and bifunctional effects. Furthermore, the electrocatalytic mechanisms of the trimetallic electrocatalysts toward C2 alcohols are determined, and high concentrations of OH− and C2 alcohols favor EGOR and EOR.

Mg-calcite CaCO3 particle: Rapid synthesis and application in fabrication of environmentally friendly hydrophobic polyurethane sponge for oil–water separation

The hydrophobic modification of polyurethane (PU) sponge is attracting considerable attention in the field of oil–water separation. A hydrophobic PU sponge with microsize cavities on the skeleton surface and interior was prepared with hierarchical structural Mg-calcite CaCO3 (MCC) particles as a template. Hydrophobic-modified MCC particles with controllable morphologies were firstly synthesized by a facile and rapid batch method under high-speed stirring for 1 min by the presence of cetyltrimethyl ammonium bromide. MCC particles were then blended into the starting foaming materials to fabricate hydrophobic PU/MCC sponge by in-situ polymerization method. Finally, MCC particles of PU/MCC sponge were etched by acid solution and microsize cavities were generated on the surface and interior of EPU/MCC sponge skeleton. The oil-adsorption capacity of obtained hydrophobic EPU/MCC sponge was 7.58 and 5.31 times higher than pristine PU sponge for engine oil and sunflower oil, respectively. This could be attributed to the microsize cavities on the skeleton surface and interior which would increase the skeleton flexibility and enhance adhesion level between the oil and sponge surface. The underwater CCl4 was completely adsorbed into the EPU/MCC sponge within 1 s, indicating its high adsorption speed. EPU/MCC sponge exhibited high separation selectivity and separation efficiency in gravity-driven oil-water separation. The results could provide a strategy to develop hydrophobic sponges with excellent oil-water separation property.

Pilot-scale continuous bacterial filtration using nanofibrous filters

The aim of this work was to study the filtration of microbially contaminated water using nanofibrous filters in a continuous process at the pilot scale. For this purpose, media filters of polystyrene and polyacrylonitrile electrospun nanofibers were used. To functionalize the antimicrobial features of these media filters, cetyltrimethylammonium bromide (CTAB) was added in different concentrations to the polymeric solutions. Nanofiber's morphology and its functional groups were characterized by utilizing scanning electron microscopy (SEM) and Fourier-transform infrared (FTIR) spectroscopy, respectively. SEM observations showed suitable electrospinning conditions which led to having nanofibers with 200 to 600 nm diameter with the proper distribution without any disorder and presence of CTAB as a salt, removed beads in polystyrene nanofibers. CTAB's existence also was noticeable in the FT-IR test. To perform filtration tests, a continuous pilot system with a capacity of 150 L/h was designed and built. The microbially contaminated water was prepared artificially and tested in the filtration pilot. The best filter efficiency showed 98.75 ± 1% bacterial removal by microbial test on before and after filtration sample. To the best of our knowledge, this is the first report on the use of a continuous pilot-scale system for the treatment of water contaminated with bacteria.

Green synthesis of silver nanoparticles using Acacia leucophloea in the presence of cetyltrimethylammonium bromide and their antibacterial activity

Green synthesis of silver nanoparticles using Acacia leucophloea in the presence of cetyltrimethylammonium bromide and their antibacterial activity

Simple preparation of surface molecularly imprinted polymer based on silica particles for trace level assay of bisphenol F.

A new electrochemical sensor based on molecularly imprinted tetraethyl orthosilicate (TEOS)-based porous interface was developed for selective recognition of bisphenol F (BPF) in this study. The sensor was prepared by depositing the solution containing TEOS and L-tryptophan (L-Trp) in the presence of cetyltrimethylammonium bromide (CTAB) as a pore-maker via hydrolysis/condensation reaction on the glassy carbon electrode (GCE). While the surface morphology and structure characterization were carried out using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM), electrochemical characterization was performed through electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The resulted MIP(TEOS:L-Trp)@GCE achieved a wide linear range of 1 × 10-15-1 × 10-14M for BPF detection with an excellent detection limit of 0.291 fM. Furthermore, the recovery of BPF from spiked bottled water and serum samples varied between 98.83 and 101.03%. These results demonstrate that MIP(TEOS:L-Trp)@GCE was found to be a simple, sensitive, and selective smart interface to detect trace pollution even from complicated samples.

Optimized purification procedure for Iranian calcium bentonite for producing montmorillonite nanosheets

AbstractIn polymer composites, montmorillonite nanosheets are crucial as fire retardants, reinforcers, anti-corrosives, detoxifying agents and ultraviolet-protection agents. However, the quality of montmorillonite nanosheets can be improved by optimizing the raw bentonite purification process in which undesirable phases are removed. Optimization of Iranian calcium bentonite purification for nanomontmorillonite synthesis considering various parameters based on various physical approaches to dispersion and ultrasonication was investigated; the calcium bentonite purification was performed using sodium hexametaphosphate followed by either sedimentation or centrifugation, and the nanomontmorillonite synthesis was performed using ultrasonic treatment. The effects of suspension concentration, milling type, pH and centrifugation duration and speed on the separation of various impure phases were evaluated qualitatively and optimized. The raw and purified bentonite and the synthesized nanomontmorillonite were characterized using X-ray powder diffraction, X-ray fluorescence spectroscopy, Fourier-transform infrared spectroscopy and scanning electron microscopy. The cation-exchange capacity was also measured in the raw and purified samples. Optimal experimental conditions in the dispersed samples were achieved at a 2.5 wt.% concentration of bentonite suspension and planetary milling at pH 7. While the ultrasonic treatment was more effective than the dispersion approach for cristobalite elimination, a smaller lateral size of the montmorillonite sheets, optimized at 0.5 wt.% concentration of the suspension, was achieved. The increased cation-exchange capacity after the purification improved the exfoliation and delamination of montmorillonite nanosheets in the presence of cetyltrimethylammonium bromide as the surfactant. The interplanar spacing of (001) planes of 15 Å in raw bentonite shifted to 21 Å and 19 Å in purified and non-purified samples, respectively, after synthesis.

Enantioselective recognition of esomeprazole with a molecularly imprinted sol-gel-based electrochemical sensor.

A simple, selective, and accurate electrochemical chiral sensor based on molecularly imprinted polymer (MIP) has beendevelopedfor sensitive and selective detection of esomeprazole (ESOM). For this purpose, the porous MIP sensor was prepared using tetraethyl orthosilicate (TEOS) and cetyltrimethylammonium bromide (CTAB) in the presence of β-cyclodextrin (β-CD) as a chiral recognizing element on aglassy carbon electrode (GCE). The changes in the MIP-layer related to removal and rebinding of the target ESOM were performed via differential pulse voltammetry (DPV) and cyclic voltammetry (CV) by using [Fe(CN)6]3-/4- as the redox probe. The structures of the developed sensor surface were characterized by using scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). Electrochemical impedance spectroscopy (EIS) was also utilized for a complementary electrochemical characterization. The calibration curve was obtained in the range 1.0 × 10-14-2.0 × 10-13M with alimit of detection (LOD) of 1.9 × 10-15M. The developed method has improved the accessibility of binding sites by producing the porous material via hydrolysis/condensation reaction of TEOS in presence of CTAB. The selectivity tests of the developed SiO2-β-CD@MIP/GCE sensor indicated a high specificity towards ESOM compared with structurally related competitor molecules such as R-omeprazole (R-OM), R-lansoprazole, and S-lansoprazole. The developed sensor was successfully used to determine ESOM in tablets and commercial human serum samples with satisfactory recoveries (100.25 to 100.60%) and precision (RSD 0.46 to 0.66%).

The study of Piszkiewicz’s and Berezin’s models on the redox reaction of allylthiourea and bis-(2-pyridinealdoximato)dioxomolybdate(IV) complex in an aqueous acidic medium

BackgroundThe study of Piszkiewicz’s and Berezin’s models on the redox reaction of allylthiourea and bis-(2-pyridinealdoximato)dioxomolybdate(IV) complex ([MoIVO2(paoH)2]2−) in an aqueous acidic medium is suggested. The Piszkiewicz’s and Berezin’s models are applied, and their parameters are used to explain the redox behaviour of allylthiourea with Mo(IV) complex in the presence of surfactants.ResultsThe reaction followed a high cooperativity pattern that reflects a strong interaction between the two redox partners in the presence of cetyltrimethylammonium bromide (CTAB) which is reinforced by a notable binding constant at the Stern layer of the micelle. The effect of cationic counter-ion (Ca2+) on the reaction rate further confirmed the effectiveness of the interaction at the rate-limiting step. The presence of sodium dodecyl sulphate (SDS) in the reaction medium resulted in reaction inhibition which reveals the interplay of electrostatic repulsion at the electrophilic polar head of the surfactant and the redox species. The effect of ionic strength on the reaction rate shows that one of the reacting species is not charged (neutral) which kept the rate of the reaction uniform at different salt concentrations studied. The change in the medium polarity buttressed the effect of ionic strength on the reaction which is explained better by Piszkiewicz’s and Berezin’s models. Free radical was actively engaged in the reductive process of the Mo(IV) complex, and this revealed that the hydrophobic region is a possible location for the interaction of the redox partner in the presence of SDS micelle.ConclusionsThe models depict well the microenvironments of enzymatic reactions involving bimolecular interactions with significant binding constants and cooperativity indexes that show the strength of the interaction between the substrates and surfactant molecules.Graphical

Synthesis of Cu2O microcubes for facet selective reduction of 4-nitrophenol

Nanomaterials with enhanced active sites are essential for improving the catalytic activity of nanomaterials. Herein, we report a simple and one-step hydrothermal method to synthesize highly active catalytic Cu2O microcubes in aqueous phase using sodium citrate in the presence of cetyl trimethylammonium bromide (CTAB) as a cationic surfactant. The electron microscopy investigations revealed the formation of sharp edged uniformly distributed Cu2O microcubes of 2.5±0.5 μm in size. The Cu2O crystal model showed (100) plane having oxygen atoms in the unit cell and Cu atoms as dangling bonds with subsequent (111) plane that resulted in excess positive charge on the cubic surface. A detailed investigations on {110} and {111} facets revealed that the {110} facet had ∼1.5 times more Cu atoms than the {111} facet. The formed Cu2O microcubes showed enhanced catalytic activity for converting p-nitrophenol into p-aminophenol. The reaction followed a linear trend at different catalyst concentrations and their rate constants and conversion time were estimated. The {110} and {111} facets acted as predominant active sites for the catalytic conversion, most likely the positive charge resulted by the dangling Cu atoms enhanced the adsorption of hydride ions. Hence, the proposed microcube system have huge potential in areas such as microreactors, photovoltaics, electronics, optics and biosensing.

Adaptive neuro fuzzy selection of important factors for prediction of plasmons in silver nanorods.

The major goal of this study was to find predictors of plasmon positions in silver nanorod (NR) optical absorption spectra. The goal of this study is to use an adaptive neural fuzzy inference system to identify the various input parameters for longitudinal surface plasmon resonance (LSPR) and transverse surface plasmon resonance (TSP). A seed strategy has been used for preparation of the silver NRs. During the preparation, the seed particles are synthesized in the presence of cetyltrimethylammonium bromide (CTAB). To produce the silver NRs, metal salt (AgNO3) has been added, as well as ascorbic acid (AA) and CTAB. Skillful prediction could play a pivotal role in the plasmon NR production management. The combination of CTAB and the seeds has the largest influence on the TSPR. The combination of CTAB and AA has the largest influence on the LSPR. The study considering different input parameters simultaneously, to the best of our knowledge, is the first on a small scale and should attract great general interest.

Mechanochemical preparation of NiCuSn nanoparticles and composites in presence of cetyltrimethylammonium bromide (CTAB) and the catalytic application of the products in homocoupling and hydration of terminal alkynes

We report the synthesis of the NiCuSn nanoparticles and nanocomposites in mechanochemical route using CTAB as milling additive. The study of grinding intensity (frequency) and time interval drew up the importance of the well-chosen operation parameters. The mild milling resulted in formation of NiSn intermetallics, while the intense ones aided the evolution of bronze and copper(I) oxide phases. The utilization of CTAB proved to be the key factor to prevent or slow down the process of mechanical alloying and to fritter the metal grains into the nanodimensions. The dynamic light scattering data demonstrated positively charged particles with average solvodynamic diameters of around 70 nm applying intense or long-term millings. Without CTAB or with relatively short or weak grindings, these values remained between 230 and 550 nm, as in the case of the surface areas getting around 20 m2/g with and 1 m2/g without CTAB. The catalytic transformation of p-methoxyphenylacetylene in dimethyl sulfoxide showed that the copper, copper(I) oxide and bronze particles managed the reaction toward the evolution of 1,3-diyne in Glaser-Hay homocoupling without base addition, while the Sn and SnO2 phases assisted to the Markovnikov-type hydration of alkyne groups. The formation of α-diketone signed that the anti-Markovnikov route was also occurred. The use of CTAB was found to exert a profound effect on the quality of catalytic end-products through the controlled generation of bronze and tin oxide phases and the solid solution of nickel atoms.

Influence of nanoscale defects on the improvement of photocatalytic activity of Ag/ZnO

This study presents the advances in the field of ZnO/Ag catalysts from the synthesis of hierarchical ZnO nanowires (NWs) decorated with Ag nanoparticles, prepared by a facile solvothermal method at 120°C. It evaluates the photocatalytic efficiency from studying the time reaction of Ag/Zn concentration ratio and the presence of cetyltrimethylammonium bromide (CTAB) as an organic dispersant. X-ray diffraction, scanning electron microscopy, and analytical/high-resolution transmission electron microscopy results confirmed the presence of homogeneous cylindrical ZnO nanowires and quasi-spherical Ag crystals. ZnO NWs exhibited hexagonal wurtzite structure and cubic FCC symmetry in Ag nanoparticles (NPS). Two types of nanostructures, including homogeneous cylindrical ZnO NWs in the absence of Ag and simultaneous presence of ZnO NWs and Ag NPs, formed depending on experimental conditions. The photocatalytic activity was evaluated by studying methylene blue (MB) degradation time under UV light excitation. Diffuse reflectance UV–Vis spectrophotometry (UV–Vis DRS) allowed identifying the ZnO absorption band at ~393 nm. Crystal size varied depending on the reaction time and the addition of CTAB. Synthesis time increased bandgap values, getting better photocatalytic performance in samples synthesized in intermediate times (6 h), higher Ag + /Zn 2+ molar ratio (0.2/1.0), and CTAB. According to HRTEM observations, the presence of silver nanocrystals with high content of defects (twinning, stacking faults) could play an essential role in the photocatalytic response. In this context, the specific synthesis conditions of Ag/ZnO might be more appropriate for their use in organic dyes degradation in water and the potential use in protective treatments against materials biodeterioration processes. • Ag/ZnO nanostructures were synthesized by solvothermal method using CTAB at 120°C. • Wurtzite (ZnO) and face-centered-cubic (Ag) crystalline phases have been identified. • The presence of defects in Ag NPs could be identified and related to PCA enhanced. • The photocatalytic behavior can be improved by incorporating Ag NPs on NWs of ZnO. • The PCA of Ag/ZnO depends upon the crystallinity, surface area, and morphology.

Insights into cetyl trimethyl ammonium bromide improving dewaterability of anaerobically fermented sludge

Cetyl trimethyl ammonium bromide (CTAB) is considered a promising sludge dewatering conditioner, but its potential dewatering mechanism has not been thoroughly understood. This study, therefore, aims to fully investigate how CTAB improves sludge dewaterability. Experimental results showed that after sludge was conditioned by 75 mg/g TSS CTAB, capillary suction time (CST), specific resistance to filtration (SRF), and the water content of sludge cake (WCSC) by vacuum filtration decreased from 164.1 ± 10.7 s, 1.90 ± 0.05 × 1012 m/kg, and 97.36 ± 0.12 % to 32.1 ± 1.4 s, 0.18 ± 0.01 × 1012 m/kg, and 70.55 ± 0.21 %, respectively. Mechanism revelations showed that CTAB could neutralize the negative charges on EPS surface and reduce the repulsive force between sludge particles to reduce the Zeta potential; CTAB could also enhance the hydrophobicity and the adhesion among the sludge particles to reduce the surface energy, and CTAB could release the intracellular water by damaging the outer membrane of sludge cells. The presence of CTAB also decreased the concentrations of PO43-, humic acid, and proteins in the liquid phase through electrostatic attractive or hydrophobic interactions. All these CTAB-caused variations in either the solid or liquid phase of sludge could result in the enhancement of sludge dewaterability. The findings deepen our understanding of CTAB affecting sludge dewatering and also might guide engineers to exploit promising strategies to facilitate sludge dewatering in the future.

Synthesis of Hollow Silica Nanotubes from Linear Metallosupramolecular Polyelectrolytes and Their Application as Catalyst Supports for Hydrogenation.

In this study, we report a facile templating method to construct hollow silica nanotubes. In particular, bis-terpyridine is used to coordinate metal ions to form polymeric bis-terpyridine-metal complexes that further self-assemble into tubular organogels in the presence of cetyltrimethylammonium bromide. The following silica deposition on organogels and subsequent calcination give metal oxide-doped hollow silica nanotubes (MxOy-HSNs). Facilitated by the high coordination stability constants of bis-terpyridine with metal ions, a series of metal ions, such as Fe, Ni, Cu, and Zn, could be used to form polymeric bis-terpyridine-metal complexes. The supported Pt/FexOy-HSNs exhibit good catalytic performance for hydrogenation of a series of substituted nitrobenzenes, showing that the obtained MxOy-HSNs could be used as catalyst supports due to their good textural properties.

The effect of cationic, anionic and nonionic surfactants on morphology and antibacterial properties of zinc oxide

In this study, zinc oxide was synthesized through wet chemical method at room temperature (RT), 40 °C and 60 °C without surfactant and at the presence of cetyltrimethylammonium bromide (CTAB), sodium dodecyl sulfate (SDS) and polyethylene glycol (PEG 6000) as cationic, anionic and non-ionic surfactants, respectively. Field emission scanning electron microscopy (FESEM) was used to investigate the effect of temperature and type of surfactants on the morphology of zinc oxide. FESEM images showed that the morphology of zinc oxide changed from rod-like at room temperature with increasing temperature. The morphology of zinc oxide samples synthesized by CTAB, SDS, and PEG surfactants was worm-like, nut-like and rod-like, respectively. The results of X-ray diffraction spectroscopy (XRD) analysis indicated the presence of zinc oxide phase in all samples. Zn(OH)2 phase was also detected in the sample synthesized with PEG 6000. Fourier-transform infrared spectroscopy (FTIR) analysis was used to evaluate the functional groups. Antibacterial activity of zinc oxide samples against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) strains was evaluated by using disc diffusion technique and colony-forming unit (CFU) method. Both methods confirmed the antibacterial activity of all samples. Moreover, the highest antibacterial activity was shown for the sample synthesized in the presence of PEG as a surfactant.

Surfactant-mediated and wet-impregnation approaches for modification of ZIF-8 nanocrystals: Mixed matrix membranes for CO2/CH4 separation

ZIF-8 nanocrystals were synthesized in the presence of cetyltrimethylammonium bromide, as a cationic surfactant, (ZIF-8@CTAB) and then modified by iron promoter (ZIF-8@Fe-CTAB) through a wet impregnation process. Self-assembly of surfactant in the synthesis route changed morphology of ZIF-8 nanocrystals from rhombic dodecahedron (RD) to truncated rhombic dodecahedron (TRD). The structural modifications significantly changed the adsorption properties of the nanocrystals for CO 2 and CH 4 , so that ZIF-8@Fe-CTAB nanocrystals provided the highest CO 2 /CH 4 adsorption selectivity ( ∼ 19) compared to values have ever been reported in the literature. The nanocrystals were also employed for preparation of mixed matrix membranes (MMMs) using Matrimid®5218 as the polymeric matrix. Investigation of gas transport properties of the MMMs confirmed promising separation performance of ZIF-8@Fe-CTAB nanocrystals for CO 2 /CH 4 separation. • Surfactant mediated approach was used to synthesize ZIF-8@CTAB nanocrystals. • ZIF-8@CTAB nanocrystals were impregnated by FeCl 3 ·6H 2 O as a metal promoter. • CO 2 /CH 4 selectivity of the impregnated nanocrystals significantly increased. • The MMMs prepared by ZIF-8@Fe-CTAB showed promising separation performance.

Improved mechanical properties of antimicrobial poly(N-[3-(dimethylaminopropyl)] methacrylamide) hydrogels prepared by free radical polymerization in the presence of cetyltrimethylammonium bromide as a lyotropic liquid crystal template

In this study, the effect of liquid crystal templates on improving the mechanical and antibacterial properties of poly(N-[3-(dimethylaminopropyl)] methacrylamide) hydrogels was investigated.

Kinetic Study of SN2 Reaction between Paranitrophenyl Benzoate and Hydrazine in the Presence of CTAB Reverse Micelles

Kinetic study of the reaction between p-Nitrophenyl benzoate (PNPB) by hydrazine (HYN) in the presence of Cetyltrimethylammonium bromide (CTAB)/Chloroform/Hexane reverse micellar medium shows that the reaction obeys first order kinetics with respect to each of the reactants. The rate of the reaction is much slower in reverse micellar medium compared to aqueous medium under identical conditions (kˈAq = 2.84×10−3 sec−1, krm =1.34×10−4 sec−1). The rate constants for the reaction in the reverse micellar medium have been determined at different values of W {W=[H2O]/[CTAB]} and at different concentrations of CTAB. It was found that the observed rate constant decreases with W. This kinetic behaviour was interpreted by using modified Berezin pseudo phase model, taking into consideration the distribution of the reactants, PNPB and hydrazine between the three pseudo phases, i.e., water pool, interface an organic phase. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

Improving Fracture Toughness of Tetrafunctional Epoxy with Functionalized 2D Molybdenum Disulfide Nanosheets.

In this work, improved fracture toughness of tetra-functional epoxy polymer was obtained using two-dimensional (2H polytype) molybdenum disulfide (MoS2) nano-platelets as a filler. Simultaneous in-situ exfoliation and functionalization of MoS2 were achieved in the presence of cetyltrimethylammonium bromide (CTAB) via sonication. The aim was to improve the dispersion of MoS2 nanoplatelets in epoxy and enhance the interfacial interaction between nanoplatelets and epoxy matrix. Epoxy nanocomposites with CTAB functionalized MoS2 (f-MoS2) nanoplatelets, ranging in content from 0.1 wt% up to 1 wt%, were fabricated. Modified MoS2 improved the fracture properties (81%) of tetrafunctional epoxy nanocomposites. The flexural strength and compressive strength improved by 64% and 47%, respectively, with 0.25 wt% loading of f-MoS2 nanoplatelets compared to neat epoxy. The addition of f-MoS2 nanoplatelets enhanced the thermomechanical properties of epoxy. This work demonstrated the potential of organically modified MoS2 nanoplatelets for improving the fracture and thermal behavior of tetrafunctional epoxy nanocomposites.