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Mohammed M. Rahman,M.M. Alam,Khalid A. Alamry 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.77 No.-
In this approach, the wet-chemical (co-precipitation) technique was used to prepare the cadmium oxide(CdO) nanoparticles (NPs) decorated with multi-walled carbon nanotubes (CNT) at low temperature. Thepowder XDR, UV–vis, TEM, XPS, and FTIR spectroscopy were used for detail characterization of thesynthesized CdO/CNT nanocomposite (NCs). A thin layer of CdO/CNT NCs was deposited onto a glassycarbon electrode (GCE) with conducting coating binder to obtain a chemical sensor which wassubsequently used to detect m-tolyl hydrazine hydrochloride (m-THyd) in buffer medium byelectrochemical approach for environmental safety. The proposed m-THyd chemical sensor exhibitedlong-term stability, good selectivity, broad linear dynamic range, lower detection limit, and enhancedelectrochemical response. The calibration curve of the current vs concentration of m-THyd was found tobe linear (r2 = 0.9903) over the linear dynamic range (LDR) of 0.01 nM to 0.1 mM. The sensitivity(25.7911 mA mM cm 2) of chemical sensor was calculated from the slope of calibration curve and surfacearea of GCE (0.0316 cm2) and the detection limit (4.0 0.2 pM) was estimated from the signal to noiseratio at 3. These preliminary results suggest that the newly developed CdO/CNT NCs nanocompositecould be promising electrochemical sensors for the detection of hazardous toxins to clean theenvironment in broad scales.
Cu-loaded ZSM-5 zeolites: An ultra-sensitive phenolic sensor development for environmental safety
Mohammed M. Rahman,Bahaa M. Abu-Zied,Abdullah M. Asiri 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.61 No.-
Various copper loaded ZSM-5 zeolites was prepared and characterized in details of their optical, structural, morphological, elemental properties by various conventional methods. The Cu-ZSM-5 zeolites were deposited on silver electrode to result in a chemical sensor that has a fast response to selective 3-methoxyphenol (3-MP) in buffer phase. Analytical sensor parameters such as sensitivity, detection limit, reproducibility, selectivity, repeatability, linear dynamic range, and electrochemical performances were investigated in details with the Cu-ZSM-5 zeolites fabricated sensors. The calibration plot is linear over the large 3-MP concentration range. The sensitivity and detection limit of target 3-MP is calculated as ∼13.232 μA cm−2 μM−1 and 0.083 ± 0.002 nM (at a signal-to-noise-ratio, SNR of 3) respectively. With such excellent features as wide linear dynamic range, higher sensitivity, good stability, lowest detection limit, excellent selectivity, the developed sensor provides a new strategy for determination of 3-MP in biomedical and environmental sample with satisfactory results.
Mohammed M. Rahman,M.M. Alam,Abdullah M. Asiri 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.62 No.-
In this approach, we report the assembly of a dynamic, high sensitive, selective and reproducible 1,2-dichlorobenzene (1,2-DCB) chemi-sensor development based on solvothermally prepared nanocubes (NCs) of FeO/CdO. The synthesized FeO/CdO NCs was exhibited as an excellent electron mediator during the sensing performance of 1,2-DCB in aqueous medium and this research work was executed by electrochemical method. The morphological, optical, elemental, and structural characterization of synthesized NCs were investigated by various conventional techniques such as FTIR, UV–vis, FESEM, XPS, EDS, and XRD. NCs were used to fabricate glassy carbon electrode (GCE) with nafion conducting binder. The sensitivity of proposed chemi-sensor was estimated from the slope of calibration curve attained as current versus concentration of 1,2-DCB relation. It was introduced a reliable future sensitive sensor development using FeO/CdO NCs by electrochemical approach for the probable detection of toxic 1,2-DCB and other environmental carcinogenic chemicals for the safety of environmental and health care fields.
Mohammed M. Rahman,M.M. Alam,Abdullah M. Asiri 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.65 No.-
The nanocomposites (NCs) of carbon black (CB) co-adsorbed ZnO nanomaterials were synthesized by facile wet-chemical process at low temperature. The prepared NCs were characterized by UV/vis, EDS, TEM, FTIR, EIS, XPS, and powder XRD. In this research approach, a newly developed benzaldehyde (BZH) chemical sensor with active ZnO/CB is studied by electrochemical method. A uniform thin layer of ZnO/CB NCs was deposited on a glassy carbon electrode (GCE) with conducting binder to result the working electrode for BZH chemical sensor. The proposed chemical sensor is displays good selectivity with lower detection limit, long-term stability and enhanced electrochemical responses. The calibration plot is found to be linear over the concentration (LDR) range of 0.1 nM–0.1 mM. The sensitivity (5.0633 μA μM−1 cm−2) and detection limit (18.75 ± 0.94 pM) of projected BZH chemical sensor were estimated from the slope of calibration plot. Based on sensing performance of ZnO/CB NCs/binder/GCE, this chemical sensor is introduced a well-organized route of efficient detection of hazardous and carcinogenic chemicals to safe the environmental and healthcare sectors in broad scales.
Mohammed M. Rahman,M.M. Alam,Abdullah M. Asiri,Sulaiman Y. M. Alfaifi,Hadi M. Marwani 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.106 No.-
High performance acute toxic methanol sensor based on hydrothermally prepared hexagonal nanodiscs(NDs) of ZnO/CdO/SnO2 (ZnCdSnO2 or ZCSO) was fabricated onto glassy carbon electrode (GCE). The characterizationof ZCSO NDs in-terms of functional group analysis, binding energy evaluation, oxidationstates, optical absorbance, crystallinity, structural morphology, and elemental compositions were performedby FTIR spectroscopy, X-ray photoelectron spectroscopy (XPS), UV–visible spectroscopy, XRD,FESEM-coupled-EDS analysis respectively. The current versus concentration plot was exhibited linearon a wide range of methanol concentration (0.01 nM to 0.1 mM) clarified as linear dynamic methanoldetection range (LDR). Considering the ZCSO NDs-coated surface area onto GCE over the slope of LDR,noticeable methanol sensor sensitivity (4.5475 mA mM1 cm2) was perceived. Besides this, a considerablelower limit (7.69 ± 0.38 pM) of detection at signal/noise = 3 is obtained. The overall results of methanolchemical sensor were found with satisfactory and acceptable results in terms of their reproducibility,sensitivity, stability, and response-time. Additionally, the assembled ZCSO NDs-coated electrode was validatedwith real environmental samples and result was found good and acceptable. On considering theoutcome of applicability and the way of this sensor assembling, this unique method might be a potentialtechnique in the field of portable sensor development for the safety of environmental and healthcarefields in a broad scale.
Mohamed A. Aboamer,Doaa H. Elgohary,Ali Abdullah Almukil,Ahmed A. Aboamer,Ibrahim M Alarifi,Mohsen Bakouri,Nader A. Rahman Mohamed 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.7
This study aims to examine the mechanical properties of acrylonitrile butadiene styrene specimens using ASTM 638, 695, and 790. UVC radiation was also used as a sterilizing method. The fused deposition modeling of 3D-printed polymerize with 30 % filling was used to manufacture 30 specimens for tensile, compression, and bending. Half of the specimens were treated with UVC, whereas the other half were not. The chosen dosage of 13.5 J/cm 2 with an exposure time of 48 min corresponds to 3650 sterilization treatments or 10 years of sterilization. The average ultimate stress in the tensile test, compression test, and bending test was 34.5 ± 7.4, 25.4 ± 0.5, and 24.5 ± 2.1 Mpa, respectively. The analysis of variance test shows that UVC radiation has a demonstrable influence on tensile specimens, with a P-value of 0.012, which is less than the significance threshold of 0.05. Thus, the null hypothesis is rejected.
Mohamed A. Aboamer,Ahmed A. Aboamer,Doaa H. Elgohary,Tarek M. Alqahtani,Ahmed Abdel-Hadi,Samiya M. Al-Mutairi,Tarek M. El-Bagory,Khaled M. Alshareef,Nader A. Rahman Mohamed 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.12
The aim of this research is to investigate the sterilizing effect of UVB radiation on the degradation and oxidation of low- and high-density polyethylene specimens using ASTM 638 and 695. Polyethylene is a reliable, efficient, and low-cost biomaterial and an alternative to various bone transplants. Twenty high-density polyethylene (HDPE) specimens and twenty low-density polyethylene (LDPE) specimens were used for tensile and compression testing. The dosage of 13.5 J/cm 2 was chosen with an exposure time of 48 minutes during the sterilization process. In terms of mechanical tensile properties, LDPE has a lower effect compared with HDPE. The p-value of yield stress equals 3.008×10 -4 , the p-value of ultimate stress equals 2.5×10 -4 , and the p-value of break stress equals 0.0075.
Mohammed M. Rahman,Sher Bahadar Khan,Hadi M. Marwani,Abdullah M. Asiri,Khalid A. Alamry,Malik Abdul Rub,Anish Khan,Aftab Aslam Parwaz Khan,Naved Azum 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
In this report, the doped ZnO-CdO nanoblocks (NBs) have been synthesized by facile wet-chemical technique at low-temperature and characterized by UV–vis, FT-IR, XRD, FESEM, XPS, XEDS, etc. The NBs were applied for the selective detection of Fe(III) ions and photo-catalytic degradation using Brilliant cresol blue (BCB). The analytical efficiency of NBs phase was also investigated for a selective detection of Fe(III) by ICP-OES. NBs were found to be the most selective toward Fe(III), where adsorption process was mainly monolayer on a homogeneous adsorbent surface. In photo-catalysis, almost 52.3% degradation with BCB dye was observed under solar sources with NBs.
M.A. Hasnat,Jamil A. Safwan,M. Shariful Islam,Zidnia Rahman,Mohammad Razaul Karim,Talha J. Pirzada,Ahmed Jalal Samed,Mohammed M. Rahman 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
Electrochemical decolorization of Methylene blue (MB) molecules was studied at Pt electrode inpresence of KNO3 and KCl as the supporting electrolytes under acidic condition. The KNO3 electrolytedisplayed MB decolorization effect, where MB molecules exhibited two redox peaks at 0.48 V and0.34 V, respectively, in cyclic voltammogram (CV). The features of redox couples indicated thedimerization ofMBmolecules. In this simple preparation technique, a less amount of sample loading wasrequired, and the method displayed high efficiency toward decolorization of MB dye. This reportindicates the possibility for improving the quality of wastewater discharged from textile and otherindustries.
Low dimensional Ni-ZnO nanoparticles as marker of toxic lead ions for environmental remediation
Mohammed M. Rahman,Sher Bahadar Khan,Hadi M. Marwani,Abdullah M. Asiri,Khalid A. Alamry,Malik Abdul Rub,Anish Khan,Aftab Aslam Parwaz Khan,Abdullah H. Qusti 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.3
We have synthesized Ni-ZnO nanoparticles (NPs) by a wet-chemical route using reducing agents. Thestructural and optical properties of Ni-ZnO NPs were investigated by various conventional methods. Theanalytical potential of the Ni-ZnO NPs was studied for a selective detection of toxic Pb(II) ion usingrecognized ICP-OES method for environmental remediation. Data obtained from the selectivity studyindicated that the selectivity of Ni-ZnO NPs phase was the most toward Pb(II) ion. However, theadsorption isotherm data of Pb(II) on Ni-ZnO NPs phase was good-match with the Langmuir-Adsorption-Isotherm, strongly supporting that the adsorption process was mainly monolayer on homogeneousadsorbent surfaces.