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RISS 인기검색어
- 검색키워드
- 저자 : Adel A. Ismail (검색결과 3 건)
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Mohammed Jalalah,Adel A. Ismail,M. Faisal,Houcine Bouzid,Jea-Gun Park,S.A. Al-Sayari 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.30 No.-
a- and b-Bi2O3 nanoparticles were synthesized in the presence of either urea or polyethylene glycol. TheXRD, TEM, and Raman analysis indicated that a-(monoclinic) Bi2O3 nanoparticles were obtained usingeither sol–gel or hydrothermal method in the presence of urea; however b-(tetragonal) phase of Bi2O3was formed using hydrothermal method in the presence of polyethylene glycol. The b-Bi2O3nanoparticles exhibited higher photocatalytic activity than a-Bi2O3. MB was completely photodegradedafter 6 h of visible light illumination using b-Bi2O3 photocatalyst whereas only 30% was photodegradedusing a-Bi2O3. The photodegradation rate of b-Bi2O3 was 5.7 times greater than that a-Bi2O3nanoparticles.
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Khalid A. Alzahrani,Adel A. Ismail 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.124 No.-
In the present work, WO3 NPs were fabricated using a facile hydrothermal method assisted bypolyvinylpyrrolidone (PVP) for the first time, and AgVO3 with different weight percentages (3%, 6%, 9%and 12%) was uniformly distributed on the surface of mesoporous WO3 by impregnation - calcinationprocesses to construct n-n heterojunction AgVO3/WO3 nanocomposites. The obtained AgVO3/WO3nanocomposites were utilized for the effective Ciprofloxacin (CIP) degradation during visible illumination. The XRD and TEM investigations verified the formation of AgVO3 and WO3 in a monoclinic crystalstructure with a particle size of 40 nm. XPS and TEM measurements evidenced the existence of Agoand Ag+ in the heterostructure AgVO3/WO3 system. 9%AgVO3/WO3 nanocomposite exhibited larger photocatalyticperformance, i.e., 100% with 120 min of illumination, than the other nanocomposite photocatalysts. The apparent rate constant of 9% AgVO3/WO3 nanocomposite (0.0162 min1) was enhanced 18times greater than the WO3 NPs (0.0009 min1). The efficient photocatalytic performance could correlatewith the close contact between AgVO3 and WO3 NPs, which enhanced the visible light absorption andefficacious separation of the carriers during degradation reactions. The AgVO3/WO3 nanocompositeobeyed the S-scheme mechanism for charge transfer to achieve promising redox abilities in bothAgVO3 and WO3. The optimized 9% AgVO3/WO3 photocatalyst showed high reusability and photostabilityfor five consecutive runs without loss its efficiency. This study provides a new mechanism for addressinghighly effective nanocomposites with excellent photocatalytic ability that exhibit practical applicationsin the environmental remediation of antibiotics.
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Amal Basaleh,Adel A. Ismail,Reda M. Mohamed 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.122 No.-
Herein, the synthesis of heterojunction WO3/BiOCl nanocomposites with a large surface area (195m2 g1)has been achieved for the first time through a simplistic synthetic procedure. The photocatalytic abilitytoward Hg(II) reduction was conducted under visible illumination. The obtained WO3/BiOCl nanocompositesexhibited better performance (100%) within 45 min compared with bare BiOCl, and commercialP25, particularly the 6%WO3/BiOCl nanocomposite was the highest photoreduction ability. The 6%WO3/BiOCl nanocomposite accomplished a high photoreduction rate of 1816.36 lmolg1h1 in comparisonwith the bare BiOCl 67.1 lmolg1h1 and P 25 84.14 lmolg1 h1. The apparent rate constant of6%WO3/BiOCl nanocomposite was determined at about 0.095 min1, which promoted 41.3 and 32.7 foldshigher than bare BiOCl and P25, respectively. The excellent photoreduction ability was ascribed to thepromoted light-harvesting and synergistic effect for the effective separation rate of electron-hole. Through photocurrent responses and photoluminescence measurement, the possible mechanism wasproposed and verified. Moreover, WO3/BiOCl photocatalyst possessed its photoreduction ability for fiveconsecutive cycles, implying its outstanding stability. WO3/BiOCl exhibited a remarkable ability to reduceHg(II) ions, indicating its potential in wastewater remediation. This study provides an economical andefficient avenue for the development, and recycling, of S-scheme material-based nanocomposites.
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