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Tansir Ahamad,Mu. Naushad,Basheer M. Al-Maswari,Jahangeer Ahmed,Zeid A. AlOthman,Saad M. Alshehri,Ayoub Abdullah Alqadami 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.53 No.-
A mesoporous magnetic zirconium phosphate was prepared for the removal of Hg2+ from aqueous medium. The saturation magnetization of pure Fe3O4 and Fe3O4@ZrP was observed 82.9 and 62.4 emu/g, respectively. The effect of different adsorption parameters was studied. The kinetic data were fitted to the pseudo 1st and pseudo 2nd order models whereas the adsorption process was best fitted into the pseudo 2nd order model. The adsorption isotherm could be well described with Langmuir model, with the maximum adsorption capacity of 181.8 mg g1 at 25 C. Thus, the present studies suggested that Fe3O4@ZrP have remarkable potential for Hg2+ removal from contaminated water.
Mu. Naushad,Saad M. Alshehri,Tansir Ahamad,Zeid A. AlOthman,Muhammad Ali Shar,Noura S. AlHokbany 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.29 No.-
The present work deals with the removal of highly toxic Cd2+from wastewater using ecofriendlycurcumin (7-bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione) formaldehyde resin (CFR). The CFR resin was characterized using several analytical techniques. The adsorption kinetics andisotherms were well fitted by pseudo-second-order and Freundlich models, respectively. The adsorptionof Cd2+ onto CFR was increased with the ionic strength (NaCl). The regeneration studies demonstrated adecrease in the adsorption of Cd2+ from 94% to 80% after five consecutive cycles. All results illustratedthat CFR was a promising adsorbent for the environmental pollution cleanup.
Komal Poonia,Pankaj Raizada,Archana Singh,Narinder Verma,Tansir Ahamad,Saad M. Alshehri,Aftab Aslam Parwaz Khan,Pardeep Singh,Chaudhery Mustansar Hussain 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.113 No.-
Effective degradation of low-concentration pollutants is a critical challenge during the water purificationprocess. The use of different chemicals can leave residue in samples that can impose potential ecotoxicologicaland adverse impacts on human health. Presently, Magnetic molecularly imprinted polymers(MMIPs) have attracted much attention as the research material comprises a non-magnetic polymerand magnetic material for selective binding for target molecule and recoverability of catalyst via magnetism,respectively. This review explains the synergistic effect of adsorption with photocatalysis tounderstand their recognition mechanism and the possible interaction between the target molecule andMIPs. Then their common imprinting polymerization processes i.e., free radical polymerization andnon-free radical polymerization are briefly discussed with their respective advantages and disadvantages. In addition, this review highlights the photocatalytic degradation mechanism of photocatalyst cumadsorbent is critically discussed by comparing it with non-imprinted polymers. Finally, the applicationsof MMIPs in the removal or degradation of refractory pollutants, sensing, and recognition have alsobeen delineated. This paper summarises progressive future challenges of the technology that need tobe exploited for the preparation of the targeted catalyst.
Vaishnavi Sharma,Abhinandan Kumar,Pardeep Singh,Praveen Kumar Verma,Tansir Ahamad,Sourbh Thakur,Quyet Van Le,Van Huy Nguyen,Aftab Aslam Parwaz Khan,Pankaj Raizada 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.128 No.-
Water splitting technology is rapidly evolving in order to generate H2 in a sustainable manner to amendthe global energy crisis. Water splitting over semiconductor catalyst nanoparticles for large-scale hydrogenproduction has shown to be a simple and affordable procedure, attracting researchers from aroundthe world for more fruitful studies and development in the field of photocatalysis. In this respect,MoSe2 is a promising semiconductor photocatalyst owing to its non-toxic nature, low Gibbs free energy,high metallic character, impressive opto-electronic properties, and outstanding photocatalytic performance. Moreover, the 2D nature of MoSe2 allows the easy tuning of the bandgap to suit H2 evolution reactionapplication by simple synthesis techniques. Therefore, in this review, we have comprehensivelydiscussed the influence of morphology on photocatalytic water splitting with a main focus on the nanostructuremodifications to modulate the properties of MoSe2. In detail, starting from the crystal structureand optimal photocatalytic features of MoSe2, insights into photocatalytic water splitting have been highlighted. Various modes of nanostructure designs involving hydro(solvo)thermal, CVD, PVD, exfoliation,and intercalation are outlined. The lower bandgap energy is subjected to a high rate of photoinducedexcitons recombination, which reduces its photocatalytic efficiency. Therefore, modification techniquessuch as doping, heterostructure construction, and vacancy generation are presented in order to concurrentlyimprove the photocatalytic water splitting performance. Finally, the study concludes with a summaryof recent advancements and anticipated potential trends in this area to instigate further researchendeavours.
BiFeO3-based Z scheme photocatalytic systems: Advances, mechanism, and applications
Aastha Dhawan,Anita Sudhaik,Pankaj Raizada,Sourbh Thakur,Tansir Ahamad,Pankaj Thakur,Pardeep Singh,Chaudhery Mustansar Hussain 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.117 No.-
Hitherto, heed has been paid substantially to concoct potential photocatalysts to counter the issues ofenvironmental degradation and energy crises. Amongst the plethora of photocatalysts, BiFeO3 (BFO)based photocatalysts are blooming as a centre of attraction due to fine chemical stability, and easy extraction. Also owing to a 2.2–2.8 electron volt (eV) narrow bandgap, BFO to has turned into a competent photocatalystfor efficient visible light absorption. So, keeping in mind the advantages of BFO and reviewingprevious reports, the present review offers a deep overview of conventional heterojunctions andadvanced Z-scheme heterojunctions. The main focus of the review is on BFO-based Z-scheme heterojunctionsalong with photocatalytic mechanisms and various applications. The successful construction ofBFO-based Z-scheme heterojunction eliminates drawbacks of bare BFO photocatalysts such as shortlivedcharge carriers, and high recombination rate, and also enhances light absorption of the system asa whole. Because of spatially separated oxidation and reduction sites and efficacious charge migration,BFO-based Z-scheme heterojunctions are proficient contenders among photocatalytic materials. Therefore, BFO-based Z-scheme heterojunctions are aptly used nowadays, in various fields like pollutantdegradation, wastewater treatment, organic synthesis, hydrogen production, and treatment ofantibiotics.
Shujahadeen B. Aziz,Rebar T. Abdulwahid,Mohd F. Z. Kadir,Hewa O. Ghareeb,Tansir Ahamad,Saad M. Alshehri 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.105 No.-
The investigation of biodegradable polymer electrolyte for energy device applications is of great importanceas a suitable alternative to the conventional electrolytes. This paper explores the employment ofplasticized methylcellulose (MC)-based polymer electrolytes for energy storage EDLC device applicationwith an energy density (46.29 Wh kg 1) close enough to lead-acid batteries. The results have shown thatthe inclusion of plasticizer can enhance the ionic conductivity to 1.17 10 3 S cm 1. It was found that theprepared polymer electrolyte was stable up to 2.1 V, which is sufficient to be employed as electrolyte andseparator in fabrication of electrical double layer capacitor (EDLC). Both te and ti values have been quantifiedfrom the TNM measurements, where the ti values for the electrolytes containing 32 wt.% and 40 wt. % of glycerol plasticizer have been found as 0.963 and 0.802, respectively. The performance of the assembledEDLC was assessed using both cyclic voltammetry (CV) and charge-discharging responses. Theabsence of redox peaks is evidenced from the CV. The value of initial specific capacitance (Cspe) of the fabricatedEDLC is 411.52 F g 1. The results achieved in this study can be considered as a breakthrough inEDLC devices.
Yongqi Yin,Sufang Fu,Sheng Zhou,Yuling Song,Lin Li,Mingyi Zhang,Jie Wang,Pandiyarajan Mariyappan,Saad M. Alshehri,Tansir Ahamad,Yusuke Yamauchi 대한금속·재료학회 2020 ELECTRONIC MATERIALS LETTERS Vol.16 No.3
Ideal bandgap ~1.4 eV of lead–tin (Pd–Sn) organic–inorganic hybrid perovskite absorber is essential to further enhance thepower conversion efciency of perovskite solar cells (PVSCs). However, due to the facile oxidation of Sn2+, large amount ofSn substituted Pb based PVSCs sufer with low stability in ambient environment. In this work, we realize an ideal bandgapperovskite by introducing a small amount (10 mol%) of Sn2+ to methylammonium lead iodide (MAPbI3). A large grain sizeMAPb0.9Sn0.1I3 flms with strong absorbance can be obtained. As a result, the best performance up to 18.3% efciency isachieved. Importantly, the MAPb0.9Sn0.1I3 cell retains 90% of its performance after operation at the maximum power pointunder full 1-sun illumination for 500 h, in contrast to the quick degradation of MAPbI3 cell. This study demonstrates thepromising potential of stable and efcient ideal band-gap Pb–Sn PVSCs.