Showing papers by "Mohammad Rezaul Karim published in 2018"
TL;DR: In this paper, a ligand was anchored with mesoporous silica, named as nano-composite materials, which was applied in the detection and adsorption of cadmium (Cd(II)) ions from wastewater samples.
351 citations
TL;DR: In this article, a coaxial electrospinning was used to fabricate core-shell composite nanofibers with PLA in the core and PVA in the shell with significant enhancements in the surface wetting and mechanical properties.
59 citations
TL;DR: In this article, the effect of fabrication method on the structure and morphology, as well as the power conversion efficiency (PCE) and stability of perovskite solar cells is summarized.
Abstract: Organolead trihalide perovskite absorber layers are potential contenders in solar energy harvesting technologies because of their competitive lower fabrication cost, high power conversion efficiency, and ease of processing. The structural, interfacial and morphological properties are the key aspects to determine the stability and photon-to-current conversion efficiency of Perovskite solar cells (PSCs). Most contemporary research has emphasised on enhancing the power conversion efficiency (PCE) of perovskites by changing the fabrication process, solvent engineering, or precursor solution. With changes in these variables, the structure and morphology of perovskites also change, which affects the photon-to-current conversion efficiency and the stability of the PSCs. However, no stockpiled records have aided in conducting corresponding research outcomes on this perspective. In this review, we summarise the effect of fabrication method on the structure and morphology, as well as the PCE and stability of PSCs. This review will help readers decipher the scientific and technological challenges concerning hybrid inorganic–organic PSCs.
40 citations
TL;DR: In this paper, the adsorption of lead and cadmium ions from an aqueous solution using a composite of titanium dioxide (TiO2)-incorporated polyacrylonitrile (PAN) electrospun nanofibers is investigated.
Abstract: This paper describes the adsorption of lead and cadmium ions from an aqueous solution using a composite of titanium dioxide (TiO2)-incorporated polyacrylonitrile (PAN) electrospun nanofibers Adsorption capacities and the mechanical response of the PAN/TiO2 composite electrospun nanofibers are investigated at different weight percentages of TiO2 (05, 10, 20, and 50 wt%) The adsorption capacities of the composite PAN/TiO2 (20 and 50 wt%) for Pb(II) and Cd(II) are remarkably increased by approximately 114 and 47%, respectively, compared to those of pure PAN electrospun nanofibers Moreover, the adsorption of Pb(II) and Cd(II) by PAN/TiO2 nanofibers reaches an equilibrium within 60 min, and the process can be described using the nonlinear pseudo-second-order kinetic model The adsorption isotherm study can be represented by the Langmuir model, which suggests the homogeneous distribution of monolayer adsorptive sites on the composite nanofiber surface Furthermore, the ultimate tensile strength and ductility of all nanofiber membranes are measured through a uniaxial tension test Mechanical tests reveal a reduction in the tensile strength of the PAN/TiO2 composite nanofibers with increase in TiO2 amount due to the possible formation of agglomerates and voids in the nanofiber structure
28 citations
Journal Article•
TL;DR: The National Energy University (NEMU) as discussed by the authors is a research center for research in engineering materials and is a center of Excellence for Research in Engineering Materials (CEREM).
Abstract: a Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, The National University of Malaysia, 43600 Bangi, Selangor, Malaysia b Institute of Sustainable Energy, Universiti Tenaga Nasional (@The National Energy University), Jalan IKRAM-UNITEN, 43000 Kajang, Selangor, Malaysia c Center of Excellence for Research in Engineering Materials (CEREM), Deanship of Scientific Research, King Saud University, Riyadh 11421, Kingdom of Saudi Arabia
26 citations
Journal Article•
TL;DR: The National Energy University of Malaysia (NENEM) as discussed by the authors is a center of excellence for research in engineering materials (CEREM), which is located at King Saud University, Riyadh, Saudi Arabia.
Abstract: a Institute of Sustainable Energy, Universiti Tenaga Nasional (@The National Energy University), Jalan IKRAM-UNITEN, 43000 Kajang, Selangor, Malaysia b Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, The National University of Malaysia, 43600 Bangi, Selangor, Malaysia c Center of Excellence for Research in Engineering Materials (CEREM), Deanship of Scientific Research, King Saud University, Riyadh 11421, Kingdom of Saudi Arabia
5 citations
TL;DR: In this paper, a CdTe-coated glass was used for thin film solar cells, and the deposition characteristics of the film were studied on three types of CdS layer.
4 citations
TL;DR: It is concluded that Thiopental sodium with low dose Suxamethonium is an effective alternative of Propofol for insertion of the laryngeal mask airway in comparison with propofol.
Abstract: Background: The increasing emphasis on day case anaesthesia has lead to the greater use of the laryngeal mask airway (LMA) as an alternative to intubation. Laryngoscopy and tracheal intubation are noxious stimuli, which cause a reflex increase in both sympathetic and sympathoadrenal activity that may result in tachycardia, hypertension and dysarrhythmias. Insertion of Laryngeal mask airway (LMA) is associated with less haemodynamic changes, minimal increase in intraocular and intracranial pressure and lower incidence of sore throat. Still its insertion requires sufficient depth of anesthesia to prevent airway reflex (gagging, coughing nd spasms). To insert LMA successfully propofol is the most frequently administered medication. But most of all recommend not using propofol singly for LMA insertion. Thiopental can’t suppress the upper airway reflexes as propofol but with low dose succinylcholine upper airway reflexes are attenuated so combination of thiopental sodium with succinylcholine may be another choice of drug.Objectives: This Prospective study was conducted to evaluate the effectiveness of Thiopental sodium and Succinylcholine for insertion of the LMA in comparison with Propofol.Methods: This interventional study was carried out in Sixty patients, aged 3-45 years who were scheduled for elective surgical procedure under general anaesthesia in ShSMCH. Patients were randomly assigned to two groups by odd and even number basis. In Group-1 (N1=30), LMA was inserted after induction with Thiopental sodium (5 mg/kg body weight i.v.) and Succinylcholine (0.5mg/kg i.v); in Group-2 (N2 = 30), the LMA was inserted with Propofol (2.5mg/kg i.v). Jaw relaxation, incidence of coughing- gagging , overall insertion condition and haemodynamic changes were observed.Results: Grade of jaw relaxation in Group-1 was Good in 93.3%, incomplete in 6.7% and 0% poor but in Group-2, 86.7% was good 10% incomplete and 3.3% was poor. Coughing occurred in 33.3% of patients in the Group-2 and there was only 10% in succinyl group (P=0.028) which is significantly higher in Group-2. Overall insertion condition in Group -1 was excellent in 86.7%, Good in 10% cases and poor in only 3.3% cases on the other hand in Group-2 excellent in 53.3%, Good in 33.3% cases and poor in only 13.3% cases (P=0.019).Conclusion: There was statistically significant difference in jaw relaxation in two groups and incidence of Gagging or Coughing is higher in Group-2. Overall insertion condition was significantly better in Group-1. We concluded that Thiopental sodium with low dose Suxamethonium is an effective alternative of Propofol.J Shaheed Suhrawardy Med Coll, June 2018, Vol.10(1); 11-15