Copper oxide (CuO) nanoparticles (NPs) were decorated on reduced graphene (rGO) through the effective synthetic route method. Powder X-ray diffraction, Fourier transform infrared, ultraviolet-visible absorption, and scanning electron microscopy techniques used to analyze chemical structure, functional groups, absorbance, morphology. Under visible light illumination, CuO/rGO nanocomposites have higher catalytic activity compared bare CuO NPs which suitable for degradation of methylene blue...

The strong electrostatic adsorption (SEA) method was applied to the synthesis of a cobalt (Co) catalyst on multi-walled carbon nanotube (CNT) support. In order uptake more cluster with higher dispersion, CNT functionalized via acid and thermal treatment. Co/CNT samples were characterized by range methods including Brunauer–Emmet–Teller (BET) surface area analyzer, transmission electron microscopy (TEM), X-ray powder diffraction (XRD) analysis, atomic absorption spectroscopy (AAS),...

Pre-treating the multi-walled carbon nanotubes (CNTs) support by refluxing in 35 vol% nitric acid followed heating at temperature of 600 to 900 °C resulted formation defects on CNTs. Increasing pre-treatment CNTs from °C, enhanced fraction cobalt-oxide nanoparticles encapsulated channels 31% 70%. The performance Co/CNTs Fischer-Tropsch synthesis (FTS) was evaluated a fixed-bed micro-reactor 240 and pressure 2.0 MPa. highest CO conversion obtained over Co/CNTs.A.900 59% it dropped ~3% after...

This research deals with the effect of temperature on physical, thermal, electrochemical, and adsorption properties carbon micro-spheres using hydrothermal carbonization (HTC). Until recently, limited has been conducted regarding effects delignification during HTC process biomass residues especially Dimocarpus longan. In this regard, lignin was first extracted from lingo-cellulosic waste Longan fruit peel (Dimocarpus longan). The holocellulose (HC) separated raw substrates (Longan...

Using Starch as a capping agent, zinc oxide (ZnO) nanoparticles (NPs) have been synthesized by the low cost and simple chemical precipitation technique. The confirmation of hexagonal crystal structure ZnO NPs were demonstrated X-ray powder diffraction (XRD) pattern. Fourier-transform infrared spectroscopy (FTIR) confirms Zn-O stretching vibrations. scanning electron microscopy (SEM) Transmission (TEM) images reveal surface morphological properties NPs. Optical investigated UV–Visible...

Multiwalled carbon nanotubes (CNT) supported cobalt oxide was prepared as a catalyst by strong electrostatic adsorption (SEA) method. The CNT support initially acid- and thermal-treated in order to functionalize the uptake more Co clusters. Co/CNT were characterized range of analytical methods including transmission electron microscopy (TEM), temperature programmed reduction with hydrogen (H2-TPR), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy,...

Solid waste management needs re-evaluating in developing countries like Pakistan, which currently employs landfilling as a first option. Over time, increasing population will result decreasing space for landfill sites, ultimately the cost of landfilling, while accumulated cause pollution. Locating and preparing sanitary includes securing large sectors also everyday activity with end goal to limit potential negative impacts. Energy production from municipal solid (MSW) is perceptive idea...

This study focuses on the extraction of cellulose nano-whiskers (CNWs) from leaves Adansonia kilima (AK), usually known as African baobab, using a combination microwave-assisted alkali (KOH) pre-treatment with subsequent bleaching process prior to ultra-sonication. Ultra-sonication was carried out ionic liquid (IL) 1-butyl-3-methylimidazolium hydrogen sulfate (Bmim-HSO4). Process parameters for ultra-sonication were optimized two-level factorial Box–Behnken design (BBD). variables such power...

Abstract Herein we developed a simple, cost effective, electrochemical sensor based on nanosized copper telluride (nps‐CuTe) for simultaneous detection of epinephrine (EP) and uric acid (UA). Voltammetric responses suggests dramatical improvement electrocatalytic properties both molecules by incorporating CuTe nps into unmodified graphite paste electrode (bare GP). Differential pulse voltammetric (DPV) measurement depicts large potential separation 128 mV between EP UA, allows their...

Abstract We developed a resistive pressure sensor based on stand‐alone film graphene incorporated natural rubber latex (NR/G) composite fabricated in simple solution casting method. The dispersion had multilayer properties and an average lateral size of ~60 nm successfully into the NR matrix to form bilayer with I 2D /I G calculated ratio 1.301. shows high sensitivity (~ 0.2 kPa −1 ), cycle stability, selective response applied linear relationship ~6.0 kPa. This work that sensors applicable...

This work reports on the refractive index and permittivity of cadmium selenide quantum dots (CdSe QDs) synthesized without use trioctylphosphine (TOP). The transmittance, reflectance, extinction coefficient values increase with QDs' size. is about 2.64 for CdSe QDs crystallite sizes between 2.1-4.1 nm. absorbance dependent real imaginary parts dielectric constant respectively. forbidden direct, allowed indirect band gap transitions are not present in via non-TOP based route.

In this research, gold nanoparticles are prepared via chemical reduction method by varying the concentrations of monosodium glutamate as reducing agent and stabilizer. Characterization studies carried out using TEM, UV-visible, photoluminescence FTIR spectroscopy. Image from TEM reveal that spherical shaped well-dispersed were produced successfully. The absorption spectra exhibit a blue-shift with decreasing particle size. quantum efficiency is found to be higher for high glutamate. However,...

This work describes noncontact temperature measurements using wavelength shifts of CdSe quantum dot (QD) doped poly(methyl methacrylate) microfiber. The sensor is fabricated a drawing method by bridging two tapered single mode fibers with polymer microfiber (PMF) approximately 3 μm in diameter. A set PMF section and without the doping CdSe-ZnS core-shell QD was applied as sensing probes used to measure temperatures over range 25°C–48°C. experimental results show that able achieve higher...

Infections after bone reconstructive surgery become an authentic therapeutic and economic issue when it comes to a modern health care system. In general; infected defects are regarded as contraindications for grafting. Since the pathogens develop biofilm on inner surface of bone; local delivery antibiotics becomes more important. The present work focuses synthesis Mesoporous Hydroxyapatite (MPHAP) loaded with drug Vancomycin (Van) investigate its loading leaching ability in phosphate buffer...

The ecosystem of earth, the habitation 7.53 billion people and more than 8.7 million species, is being imbalanced by anthropogenic activities. ever-increasing human population race industrialization an exacerbated threat to ecosystem. At present, global average waste generation per person articulated as 494 kg/year, enormous amount household (HSW) that ultimately hits 3.71×1012 kg in one year. ultimate destination HSW a burning issue because open dumping main treatment final disposal systems...

The effects of process conditions on Fischer–Tropsch Synthesis (FTS) product distributions were studied using a fixed-bed microreactor and Co–Mn/CNT catalyst. Cobalt Manganese, supported Carbon Nanotubes (CNT) catalyst prepared by Strong Electrostatic Adsorption (SEA) method. CNT supports initially acid thermally treated in order to functionalize support uptake more Co clusters. Catalyst samples characterized Transmitted Electron Microscope (TEM), particle size analyzer, Thermal Gravimetric...

In this work, Cadmium selenide quantum dots (CdSe QDs) are synthesized successfully without the use of trioctylphosphine (TOP) at various concentrations selenium (Se) precursor. UV-vis, PL and FTIR spectroscopy, as well TEM XRD used for characterization studies CdSe QDs. The pattern shows zinc-blend phase absorption spectra exhibit a strong blue-shift with decreasing QDs size, which is attributed to confinement effect. image reveal that spherical, compact dense in structure maximum particles...

Manganese-doped cadmium selenium quantum dots (Mn-doped CdSe QDs) were successfully synthesized in the absence of trioctylphosphine (TOP) at various ripening temperatures and times. The TEM image shows QDs with average particles size 5.3nm almost spherical shape. optical properties Mn-doped investigated using ultraviolet-visible photoluminescence spectroscopy. behavior was monitored red-shift characteristics UV-Vis absorption spectra, their variations estimated by confinement theory. PL...

Microbial fuel cell, as a promising technology for simultaneous power production and waste treatment, has received great deal of attention in recent years; however, generation relatively low density is the main limitation towards its commercial application. This study contributes toward optimization, terms maximization, microbial cell by employing response surface methodology, coupled with central composite design. For this optimization study, interactive effect three independent parameters,...

This study presents the electromagnetic (EM) characterization of a multiwalled carbon nanotubes (MWCNT)–silver nanoparticles (AgNP)-reinforced poly(vinyl alcohol) (PVA) hybrid nanocomposite fabricated via solution mixing technique. Primarily, structure and morphological properties PVA/MWCNT–AgNP are confirmed by X-ray diffraction (XRD) field emission scanning electron microscopy (FESEM). The complex permittivity (ε*) permeability (μ*), as well scattering parameters measured using PNA network...