Browsing by Author "Khan, K.A.,"

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A Study on Light Traps for Attracting and Killing the Insects Using PKL Electricity
(Springer Science and Business Media Deutschland GmbH, 2021) Khan, K.A.,; Sultana, R.,; Islam, S.,; Zian Reza, S.M.
Insects can see the radiation of Ultra Violet (UV) light. Nocturnal insects emit Ultra Violet light and the light source can attract them. To keep it in mind a PKL light source has been designed and developed to kill the insects in the paddy, vegetables, flowers, and fruits field. PKL light traps have been used to reduce the damage of the paddy, flowers, vegetables, and fruits from the nocturnal moths. Some lamps are used to control the type of pests those species are attracted to yellow color. To control the flying insects in the cultivated land a new and innovative PKL electric lighting system based on LED have been designed and developed.
A study on pkl electrochemical cell for three different conditions
(Springer Science and Business Media Deutschland GmbH, 2019-12-29) Khan, K.A.,; Saime, M.A.,; Hazrat Ali, M.,; Zian Reza, S.M.,; Alam, N.,; Afzol Hossain, M.,; Rab, M.N.F.,; Islam, S.
It has been conducted this research work to measure the short-circuit current (Isc) and capacity (C = AH) for different conditions of the PKL (Pathor Kuchi Leaf). The copper and zinc plates have been embedded between the two ends of the PKL for three different conditions like fresh leaves, dry leaves and living leaves to make PKL electrochemical cells. The plates were kept tightly binding by plastic clips. A sophisticated multimeter was used to measure the short-circuit current (Isc). The short-circuit current was recorded after 12 h interval. It was seen that the obtained maximum current was 0.7 A for living PKL tree and the minimum current was recorded for dry PKL about 0.10 A for dry PKL. The variation between maximum and minimum short-circuit current difference is for dry PKL is 0.14 A, for fresh PKL is 0.10 A and for living PKL tree is 0.00 A. The maximum capacity was 67.2 AH for living PKL tree and the minimum capacity was 2.16 AH for dry PKL. This type of works has been conducted by us for the first time in Bangladesh. It will help the poor for practical power applications with solar photovoltaic systems. There are some differences from the SPV (Solar Photovoltaic System). The SPV system did not work at night and rainy season. But these PKL power woks equally both day and night time. Furthermore, the PKL power technology is new and innovated technology in Bangladesh whereas the SPV device was innovated by a Russian scientist. For better performance of the PKL electrochemical cell, Some Performance and operation characteristics of the PKL electrochemical cell like input–output curves, efficiency curves, heat rate and incremental curves have been conducted. Finally, the performance of the PKL electrochemical extract cell has been studied by magnetic stirrer with hot plate. It is found that the performance of the PKL cell increases after making oscillation for PKL filtered extract by magnetic stirrer with hot plate.
Electrical Activities of Ginger Extract-Mediated Silver Nanoparticles in Bio-electrochemical Cell
(Springer Science and Business Media Deutschland GmbH, 2023) Khan, K.A.,; Paul, B.,; Siddique, M.A.K.,; Paul, M.,; Zian Reza, S.M.
The rising demand for electricity is becoming a tread throughout the world. In this study, a modified Zn/Cu electrodes-based bio-electrochemical cell (BEC) has been developed by using the ginger extract electrolyte and silver nanoparticles (Ag NPs). The effect of Ag NPs on the open circuit voltage (V), short circuit current (I), maximum power (P), power density (Pd), and internal resistance (R) of the BEC has been examined. Here, Ag NPs were formed via a rapid, non-toxic green synthesis process by using the ginger extract reducing agent. The functional groups in the ginger extract play an important role in reducing the Ag NPs from the Ag ions. The formation of Ag NPs was probed by X-ray diffraction spectroscopy (XRD) and UV–visible spectroscopy, and the active functional groups presented in the plant extract have been identified by using the Fourier transform infrared (FT-IR) analysis. The Ag NPs were incorporated in BEC to integrate the power and power density of cell. Such a modified Zn/Cu-based BEC can take the frontier forward for the integration of nanotechnology in low-cost electricity generation.
Extract of Green Chili—A New Source of Electricity
(Springer Science and Business Media Deutschland GmbH, 2021) Ohiduzzaman, M.,; Khan, K.A.,; Islam, S.,; Hossain, M.S.,; Rasel, S.R.
Green chili is abundantly available for everywhere in the world. It is cultivating for cooking in curry. It can be used a green source of energy. Previously, it has been generated electricity from different vegetative and fruits. Electrochemistry is the responsible of mechanism for electricity generation from vegetative and fruits. In this paper, it has been used as a source of electricity using electrochemical cell. The Zn/Cu-based electrodes were used, and the extract of the green chili was used as an electrolyte. The green-electrochemical systems achieve the reduction reaction with a certain voltage for which electrons transfer between the cathode and anode. Here, cathode means gain of electron, and anode means loss of electrons. In this research paper, zinc is used as an anode, and copper is used as a cathode. The electrons react with Cu2+ and H+. The Cu2+ and H+ eventually convert into Cu and H2 atoms. Finally, it is shown that Cu atoms were deposited onto the copper plate, and H2 releases from the green chili electrochemical cell. The experimental results were observed with and without adding copper sulfate solution $${\text{CuSO}}:{4} \cdot 5{\text{H}}_{2} {\text{O}} $$ as a secondary salt. The outcome of the research work improvises a better understanding on the electricity generation technology of the system.
Green Synthesis of Magnetite (Fe3O4) Nanoparticles Using Azadirachta indica Leaf Extract and Their Characterization
(Springer Science and Business Media Deutschland GmbH, 2021) Pervin, R.,; Khan, K.A.,; Khan, N.I.,; Atique Ullah, A.K.M.,; Zian Reza, S.M.
Magnetite (Fe3O4) nanoparticles (NPs) were prepared through green synthesis route using Azadirachta indica leaf extract that acted as an efficient stabilizer and capping agent of the NPs. Two types of magnetite NPs were synthesized using 5 and 10 mL Azadirachta indica leaf extract of the same concentration. The X-ray diffraction (XRD) analysis showed that the particles were crystalline with cubic inverse spinel structure and the crystallite size was found to be about 5.73 nm and 6.34 nm, respectively. The surface morphology of the NPs was investigated by field emission scanning electron microscopy (FESEM) which showed that NPs were spherical in shape. The Fourier transform infrared spectroscopy (FT-IR) analysis showed that the capping agents of the NPs contained the functional groups alcohol, alkane, amine, alkyne, etc. The thermal stability of Fe3O4 NPs was investigated using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). DSC showed endothermic and exothermic peaks. The percentage of weight loss was about 55% and 40%, respectively, as found from TGA. The NPs were superparamagnetic in nature with zero coercivity and zero reminance magnetization which was observed using a vibrating sample magnetometer (VSM). On the treatment of aqueous solutions of ferrous and ferric salts in alkaline medium with Azadirachta indica leaf extract, the rapid formation of stable iron oxide nanoparticles (Fe3O4-NPs) is observed to occur. The average crystallite size was determined by Scherer formula which showed that the crystallite size of the NPs gets increased with the increasing amount of Azadirachta indica extract used. Which support and show a good agreement with XRD and VSM analysis.
Solar medical sterilizer using pressure cooker for rural off-grid areas
(Springer Science and Business Media Deutschland GmbH, 2019) Khan, K.A.,; Rasel, S.R.,; Zian Reza, S.M.,; Saime, M.A.,
To design and develop a prototype, solar medical steam sterilizer for use in remote areas around the world. A paraboloidal dish-type concentrator was used as a collector and a pressure cooker was used as a receiver/absorber. The concentrator and receiver (C–R) system was used as a medical sterilizer. To increase the reflectance of the concentrator, aluminum foil was used as cover to reflect the solar radiation on to the bottom of the pressure cooker. The bottom of the pressure cooker was coated by normal black body. The pressure cooker gained temperature and pressure. A thermocouple was used to measure the temperature, and pressure gauze was used to measure the pressure, respectively. The solar beam radiation was measured by pyrheliometer. The required temperature was 121 °C, and the pressure was 1.05 kg/cm2 which were obtained, and those were measured by thermocouple and pressure gauze, respectively. When the obtained temperature 121 °C and pressure 1.05 kg/cm2 was kept for 15 min mixed with medical instruments and water, and then it was tested at ICDDRB and BCSIR at Dhaka, Bangladesh and shown that these medical instruments were sterilized properly. The cost of the whole system was around 90 USD. It has been used as a paraboloidal dish-type concentrator, a pressure cooker, and medical instruments mixed with water which makes a solar steam medical sterilizer.
Studies on Synthesis, Characterization, and Monitoring of Ag NPs for Power Production Using Tomato
(Springer Science and Business Media Deutschland GmbH, 2023-06-27) Islam, F.,; Khan, K.A.,; Hossain, M.S.; Rasel, S.R.; Akter, S.
In this research paper, tomato extract has been synthesized and characterized for Ag NPs. This synthesized Ag NPs have been used for power production. This produced Ag NPs using tomato extract are very useful and eco-friendly. Different characterizations have been conducted UV-visible spectroscopy, FTIR, XRD, and FESEM. It is found that the absorption peak at around 428 nm for UV-visible spectrum. It is also found that the biomolecule compounds were responsible for the reduction and capping material of silver nanoparticles using FTIR spectra. It is also found that the particles to be crystalline in nature by XRD study, with a face-centered cubic (FCC) structure. The power production activity of Ag NPs was assessed to find their potential use in electrochemical cell. It is found that the open circuit voltage (Voc), short circuit current (Isc), and maximum power (Pmax) were better for using Ag NPs from the tomato extract of a single electrochemical cell.
Voltage cultivation from fresh leaves of air plant, climbing spinach, mint, spinach and indian pennywort for practical utilization
(Springer Science and Business Media Deutschland GmbH, 2019-12) Rab, M.N.F.,; Khan, K.A.,; Rasel, S.R.,; Hazrat Ali, M.,; Hassan, L.,; Abu Salek, M.,; Zian Reza, S.M.,; Ohiduzzaman, M.
It has been designed and developed to study the voltage, current and power production from fresh leaves of five different vegetative as a comparative study. It has been collected fresh leaves from different vegetative and then it was embedded by two pairs electrodes Zn–Cu and Zn–Ag materials as positive and negative electrodes, respectively. The open-circuit voltage, short circuit current and maximum power have been measured by calibrated millimeters. It has been shown that it is possible to generate voltage, current and power from the fresh leaves of five different vegetative but PKL (Pathor Kuchi Leaf) is the best for electricity generation among them. It has not been done before yet this type of comparative study from five different fresh leaves of vegetative. The studies had been conducted on PKL electrochemical cell using PKL extract. But in this research it has been used fresh leaves for electricity production. But no research has been conducted on rest of the fresh leaves of four types vegetative. Furthermore, it has also conducted a comparative study between the two pair electrodes Zn–Cu and Zn–Ag, respectively.