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Awual, M. R.; Ismael, M.*; Khaleque, M. A.*; 矢板 毅
Journal of Industrial and Engineering Chemistry, 20(4), p.2332 - 2340, 2014/07
被引用回数：177 パーセンタイル：98.35(Chemistry, Multidisciplinary)The functionalized mesoporous silica based meso adsorbent was developed for ultra trace Cu(II) detection and removal from wastewater. The meso adsorbent was fabricated by direct immobilization of ligand onto mesoporous silica monoliths. The calculated HOMO LUMO small energy gap suggested that the electrons excitation according to the electron/energy transfer mechanism was evident in the intense of color complexation during selective detection and removal. The adsorbent was successfully applied in the determination and removal of Cu(II) ions in environmental samples.
Awual, M. R.; Ismael, M.*
Sensors and Actuators B; Chemical, 196, p.457 - 466, 2014/06
被引用回数：134 パーセンタイル：98.51(Chemistry, Analytical)The adsorbent was prepared by indirect and dense immobilization of 6((2(2 hydroxy 1 naphthoyl)hydrazono)methyl) benzoic acid (HMBA) onto fine tuned surface patterning of nanostructure inorganic silica. The small energy gap for the complex compared with the HMBA suggested the easily excitation of electrons according to the electron transfer or energy transferred mechanism, which results in the intense color of the stable complexation mechanism. The influence of several variables such as solution acidity, initial concentrations and the addition of diverse ions for Au(III) detection and recovery has also been considered and evaluated. The detection limit of the conjugate adsorbent at optimum conditions was 0.11 ppb. The Au(III) sorption forms a monolayer on the interior pore surfaces of the conjugate adsorbent and showed high sorption capacity (203.42 mg/g).
Awual, M. R.; Ismael, M.*; 矢板 毅
Sensors and Actuators B; Chemical, 191, p.9 - 18, 2014/02
被引用回数：159 パーセンタイル：99.01(Chemistry, Analytical)The composite adsorbent was prepared by indirect immobilization of 6-((2-(2-hydroxy-1-naphthoyl)hydrazono)methyl)benzoic acid (HMBA) onto mesoporous silica monoliths. The composite adsorbent enhanced the color formation by stable complexation as [Co(II)-HMBA]
complexes during detection and sorption operations. The effective pH range for Co(II) ions detection and sorption was neutral pH region and the maximum sorption capacity of the adsorbent was as high as 189.37 mg/g.
Awual, M. R.; Ismael, M.*; 矢板 毅; El-Safty, S. A.*; 塩飽 秀啓; 岡本 芳浩; 鈴木 伸一
Chemical Engineering Journal, 222, p.67 - 76, 2013/04
被引用回数：306 パーセンタイル：99.55(Engineering, Environmental)A highly selective mesoporous composite adsorbent is proposed for simultaneous detection and removal of Cu(II) ions in natural waters. The adsorbent offered a simple procedure in ultra-trace Cu(II) sensing optically without using high tech instruments. The data also revealed that the adsorbent exhibited high sorption capacity (182.15 mg/g) and extreme high selectivity in high concentration ionic competition. Moreover, the present adsorbent was successfully applied to the determination, removal and elution Cu(II) ions in environmental samples.
El-Safty, S. A.*; Shenashen, M. A.*; Ismael, M.*; Khairy, M.*; Awual, M. R.
Microporous and Mesoporous Materials, 166, p.195 - 205, 2013/01
被引用回数：136 パーセンタイル：98.1(Chemistry, Applied)Mesoporous aluminasilica sensor was designed for optical Pd(II) and Cu(II) ions detection and removal at specific pH solution. The data revealed that this sensor materials was efficiently remove Pd(II) and Cu(II) at pH3.5 and 7.0, respectively. Moreover, this was reversible and reusable for several cycles withput deterioration in its performances.
El-Safty, S. A.*; Shenashen, M. A.*; Ismael, M.*; Khairy, M.*; Awual, M. R.
Analyst, 137(22), p.5278 - 5290, 2012/10
被引用回数：135 パーセンタイル：98.08(Chemistry, Analytical)Optical captor design is necessary for the controlled development of a technique for detecting and removing heavy and toxic metals from drinking water with high flexibility and low capital cost. We designed chemical mesocaptors for optical separation/extraction and monitoring/detection of Cu(II) and Zn(II) ions from water even at trace concentration levels without a preconcentration process. Theoretical models have been developed to provide insights into the effect of active site surfaces on the enhancement of the optical removal process in terms of long-term stability, reversibility, and selectivity, hence allowing us to understand the role of mesoscopic geometry and nanoscale pore orientation of mesocaptors better.
