http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Ahmad Mashkoor (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
M. Raffi,Zaira Batool,Mashkoor Ahmad,M. Zakria,Rana I. Shakoor,Muhammad Aslam Mirza,Arshad Mahmood 한국섬유공학회 2018 Fibers and polymers Vol.19 No.9
Titanium dioxide (TiO2) is one of the excellent photocatalysts used for degradation of environmetal pollutants. In this work, 2.5, 5.0 and 7.5 wt.% of silver (Ag)-loaded TiO2 nanofibers of mean size 52-134 nm were synthesized by electrospinning method. These electrospun nanofibers were calcined at 500 oC to enable the transformation of Rutile (R) phase to Anatase (A), elimination of reaction moieties from the TiO2 matrix and subsequently formation of Ag clusters. The effect of Ag loading on the morphology, crystal structure, phase transformation, and band gap of these electrospun nanofibers have been characterized by scannining electron microscopy (SEM), X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), raman spectroscopy and UV-visible spectroscopy. These nanofibers exhibited a red-shift in the absorbance edge and a significant enhancement of light absorption in the wavelength range of 250-550 nm. These electrospun nanofibers were investigated for photodecomposition of methylene blue (MB), and photocatalytic decolorization rates were determined by pseudo-first-order equation. The rate constants for the pure and those of 2.5, 5.0, and 7.5 wt% Agloaded TiO2 nanofibers were computed to be 0.1439 min-1, 0.1608 min-1, 0.1876 min-1, and 0.2251 min-1 respectively.
-
Ali, Ghulam,Patil, Supriya A.,Mehboob, Sheeraz,Ahmad, Mashkoor,Ha, Heung Yong,Kim, Hak-Sung,Chung, Kyung Yoon Elsevier 2019 Journal of Power Sources Vol.419 No.-
<P><B>Abstract</B></P> <P>High-performance electrode materials for lithium-ion batteries (LIBs) are urgently required to meet the requirement of the widespread use of energy storage devices from small-to large-scale applications. In this regard, ultra-small nanocrystalline SnO<SUB>2</SUB> particles with a size of ∼3 nm are synthesized using a simple hydrothermal method and investigated as a high capacity anode material for LIBs. The SnO<SUB>2</SUB> anode shows a high reversible capacity of 1026 mAh g<SUP>−1</SUP> at a current density of 150 mA g<SUP>−1</SUP>. The kinetic study of the anode material is conducted and compared using cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic intermittent titration techniques and the lithium diffusion coefficient at open circuit potential is calculated to be 3.71978 × 10<SUP>−13</SUP>, 1.818 × 10<SUP>−14</SUP>, and ∼1.82 × 10<SUP>−16</SUP> cm<SUP>2</SUP> s<SUP>−1</SUP>, respectively. The reaction mechanism of highly reversible SnO<SUB>2</SUB> nanoparticles is investigated using ex-situ XRD, XPS, in-situ X-ray absorption near edge spectroscopy, and TEM and the results reveal the formation of lithium-tin alloy in the lithiated electrode and reversible formation of SnO<SUB>2</SUB> upon delithiation.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Ultra-small nanocrystalline SnO<SUB>2</SUB> particles with a size of 3 nm are synthesized. </LI> <LI> SnO<SUB>2</SUB> nanocrystalline electrode shows a specific capacity of 1026 mAh g<SUP>−1</SUP>. </LI> <LI> This electrode delivers a 350 mAh g<SUP>−1</SUP> at a high current density of 2 A g<SUP>−1</SUP>. </LI> <LI> Li kinetic study was performed and compared using CV, EIS, and GITT. </LI> <LI> The reaction mechanism was revealed using ex-situ XRD, XPS, and TEM. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
-
Electrochemical sensing of H2O2 using cobalt oxide modified TiO2 nanotubes
Ullah Rahim,Rasheed Muhammad Asim,Abbas Shafqat,Rehman Khalil-ul,Shah Attaullah,Ullah Karim,Khan Yaqoob,Bibi Maryam,Ahmad Mashkoor,Ali Ghafar 한국물리학회 2022 Current Applied Physics Vol.38 No.-
Cobalt oxide (Co3O4) modified anatase titanium dioxide nanotubes (ATNTs) have been investigated for the electrochemical sensing of hydrogen peroxide (H2O2). ATNTs have been synthesized by a two-step anodization process. ATNTs were then modified with Co3O4 employing chemical bath deposition method. The structure and morphology of ATNTs and their modification with Co3O4 has been confirmed by X-ray diffraction by scanning electron microscopy. H2O2 sensing has been studied in 0.1 M PBS solution, by cyclic voltammetry and amperometry. Variation in the peak positions and current densities was observed with addition of H2O2 for Co3O4 modified ATNTs. Sensitivity and limit of detection improved with modification of ATNTs with Co3O4 with precursor concentration up to 0.8 M. However, at higher precursor concentrations sensitivity and limit of detection toward H2O2 deteriorated. Co3O4 Modified ATNTS using 0.8 M precursor concentration are comparatively more suitable for H2O2 sensing applications due to the optimum formation of Co3O4/ATNTs heterojunctions.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
