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Adsorption of Phenol on Mesoporous Carbon CMK-3: Effect of Textural Properties
Enamul Haque,Nazmul Abedin Khan,Siddulu Naidu Talapaneni,Ajayan Vinu,제갈종건,정성화 대한화학회 2010 Bulletin of the Korean Chemical Society Vol.31 No.6
Mesoporous carbon CMK-3s with different textural properties have been used for the adsorption of phenol to understand the necessary physicochemical properties of carbon for the efficient removal of phenol from contaminated water. The kinetic constants (both pseudo-second order and pseudo-first-order kinetics) increase with increasing pore size of carbons. The maximum adsorption capacities correlate well with micropore volume compared with surface area or total pore volume even though large pore (meso or macropore) may contribute partly to the adsorption. The pore occupancies also explain the importance of micropore for the phenol adsorption. For efficient removal of phenol,carbon adsorbents should have large micropore volume and wide pore size for high uptake and rapid adsorption,respectively.
Superior adsorption capacity of mesoporous carbon nitride with basic CN framework for phenol
Haque, Enamul,Jun, Jong Won,Talapaneni, Siddulu Naidu,Vinu, Ajayan,Jhung, Sung Hwa The Royal Society of Chemistry 2010 Journal of materials chemistry Vol.20 No.48
<p>Highly basic 2D-mesoporous carbon nitride (MCN-1) shows the highest adsorption capacity and adsorption kinetic constant for phenol due to its well ordered porous structure with the in-built basic NH and NH<SUB>2</SUB> groups on the surface, high surface area and large pore volume, suggesting the potential application of MCN-1 for the purification of contaminated water.</p> <P>Graphic Abstract</P><P>The highest adsorption capacity and kinetic constant for phenol adsorption has been achieved over mesoporous carbon nitride due to the presence of in-built basic functional groups and excellent textural parameters. <img src='http://pubs.rsc.org/ej/JM/2010/c0jm02974b/c0jm02974b-ga.gif'> </P>
Haque, Enamul,Khan, Nazmul Abedin,Kim, Chang Min,Jhung, Sung Hwa American Chemical Society 2011 Crystal Growth & Design Vol.11 No.10
<P>Several porous materials such as metal–organic frameworks (MOFs) and aluminophosphates have been synthesized with microwave and conventional electric heating in various temperatures and times to investigate the quantitative acceleration in the synthesis of porous materials by microwaves. From the analysis of the acceleration under microwave heating with the Eyring equation, it can be understood that, irrespective of the type of porous materials, the acceleration by microwaves is mainly due to decreased activation free energy (Δ<I>G</I><SUP>⧧</SUP>) even though the activation energy (<I>E</I><SUB>a</SUB>) and activation enthalpy (Δ<I>H</I><SUP>⧧</SUP>) are increased. The decreased activation free energy is mainly due to the high activation entropy (Δ<I>S</I><SUP>⧧</SUP>) of microwave synthesis compared with the entropy of conventional electric synthesis. Accelerated synthesis with microwaves may be explained with changes of relative energies of intermediates for high activation entropy.</P><P>The accelerated synthesis of porous materials under microwave is mainly due to the decreased activation free energy even though the enthalpy and activation energy are increased.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/cgdefu/2011/cgdefu.2011.11.issue-10/cg200594e/production/images/medium/cg-2011-00594e_0008.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/cg200594e'>ACS Electronic Supporting Info</A></P>
Haque, Enamul,Jun, Jong Won,Jhung, Sung Hwa Elsevier 2011 Journal of hazardous materials Vol.185 No.1
<P><B>Abstract</B></P><P>An iron terephthalate (MOF-235), one of the metal-organic frameworks (MOFs), has been used for the removal of harmful dyes (anionic dye methyl orange (MO) and cationic dye methylene blue (MB)) from contaminated water <I>via</I> adsorption. The adsorption capacities of MOF-235 are much higher than those of an activated carbon. The performance of MOF-235 having high adsorption capacity is remarkable because the MOF-235 does not adsorb nitrogen at liquid nitrogen temperature. Based on this study, MOFs, even if they do not adsorb gases, can be suggested as potential adsorbents to remove harmful materials in the liquid phase. Adsorption of MO and MB at various temperatures shows that the adsorption is a spontaneous and endothermic process and that the entropy increases (the driving force of the adsorption) with adsorption of MO and MB.</P>
Adsorption of Phenol on Mesoporous Carbon CMK-3: Effect of Textural Properties
Haque, Enamul,Khan, Nazmul Abedin,Talapaneni, Siddulu Naidu,Vinu, Ajayan,JeGal, Jong-Geon,Jhung, Sung-Hwa Korean Chemical Society 2010 Bulletin of the Korean Chemical Society Vol.31 No.6
Mesoporous carbon CMK-3s with different textural properties have been used for the adsorption of phenol to understand the necessary physicochemical properties of carbon for the efficient removal of phenol from contaminated water. The kinetic constants (both pseudo-second order and pseudo-first-order kinetics) increase with increasing pore size of carbons. The maximum adsorption capacities correlate well with micropore volume compared with surface area or total pore volume even though large pore (meso or macropore) may contribute partly to the adsorption. The pore occupancies also explain the importance of micropore for the phenol adsorption. For efficient removal of phenol, carbon adsorbents should have large micropore volume and wide pore size for high uptake and rapid adsorption, respectively.
Khan, Nazmul Abedin,Haque, Enamul,Jhung, Sung Hwa Royal Society of Chemistry 2010 Physical chemistry chemical physics Vol.12 No.11
<P>A typical MOF material, Cu-BTC has been synthesized with microwave and conventional electric heating in various conditions to elucidate, for the first time, the quantitative acceleration in the synthesis of a MOF by microwaves. The acceleration by microwaves is mainly due to rapid nucleation rather than rapid crystal growth, even though both stages are accelerated. The acceleration in the nucleation stage by microwaves is due to the very large pre-exponential factor (about 1.4 × 10<SUP>10</SUP> times that of conventional synthesis) in the Arrhenius plot. However, the activation energy for the nucleation in the case of microwave synthesis is higher than the activation energy of conventional synthesis. The large acceleration in the nucleation, compared with that in the crystal growth, is observed once again by the syntheses in two-steps (changing heating methods from microwave into conventional heating or from conventional heating into microwave heating just after the nucleation is completed). The crystal size of Cu-BTC obtained by microwave-nucleation is generally smaller than the Cu-BTC made by conventional-nucleation, probably due to rapid nucleation and the small size of nuclei with microwave-nucleation.</P> <P>Graphic Abstract</P><P>The accelerated synthesis of Cu-BTC under microwave is mainly due to the acceleration in nucleation and the increased pre-exponential factor. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b921558a'> </P>
Tae-Jun Kwon,Da-Sol Lee,Md. Enamul Haque,Rang-Woon Park,Byungheon Lee,Dongkyu Kim,Yong-Hyun Jeon,Kil-Soo Kim,Sang Kyoon Kim 한국실험동물학회 2021 한국실험동물학회 학술발표대회 논문집 Vol.2021 No.7
The development of reliable methods to diagnose acute kidney injury is essential to allow the adoption of early therapeutic interventions and evaluate their effectiveness. Based on the fact that kidney injury molecule-1 (KIM-1) expression levels in kidneys are markedly upregulated early after a damage event, here we developed a noninvasive KIM- 1-based molecular imaging technique to detect kidney injury. First, we took advantage of a phage-display platform to select small peptides demonstrating a specific high binding affinity to KIM-1. The promising candidate was conjugated with fluorescent probes, and its imaging potential was validated in vitro and in vivo. This peptide, with the sequence CNRRRA, not only showed a high imaging potential in vitro, allowing a strong detection of KIM-1 expressing cells by microscopy and flow cytometry but also generated a strong kidney-specific signal in live-imaging in vivo experiments in the context of a drug-induced kidney-injury mouse model. Our data overall suggest that the CNRRRA peptide is a promising probe to use in the context of in vivo imaging for the detection of KIM-1 overexpression in damaged kidneys.
Peptide-based targeted therapeutics and apoptosis imaging probes for cancer therapy
Vadevoo, Sri Murugan Poongkavithai,Gurung, Smriti,Khan, Fatima,Haque, Md. Enamul,Gunassekaran, Gowri Rangaswamy,Chi, Lianhua,Permpoon, Uttapol,Lee, Byungheon Springer-Verlag 2019 Archives of Pharmacal Research Vol.42 No.2