نتایج جستجو برای: nitrogen doping

تعداد نتایج: 143598  

Journal: :Chemistry 2015
Chen Cheng Xianjun Tan Deli Lu Lingzhi Wang Tapas Sen Juying Lei Ahmed Mohamed El-Toni Jinlong Zhang Fan Zhang Dongyuan Zhao

Mesoporous silica synthesized from the cocondensation of tetraethoxysilane and silylated carbon dots containing an amide group has been adopted as the carrier for the in situ growth of TiO2 through an impregnation-hydrothermal crystallization process. Benefitting from initial complexation between the titania precursor and carbon dot, highly dispersed anatase TiO2 nanoparticles can be formed ins...

2015
Zhonghua Xiang Dan Wang Yuhua Xue Liming Dai Jian-Feng Chen Dapeng Cao

Owing to the shortage of the traditional fossil fuels caused by fast consumption, it is an urgent task to develop the renewable and clean energy sources. Thus, advanced technologies for both energy conversion (e.g., solar cells and fuel cells) and storage (e.g., supercapacitors and batteries) are being studied extensively. In this work, we use porous aromatic framework (PAF) as precursor to pro...

2016
Huidi Tian Lu Wang Zdenek Sofer Martin Pumera Alessandra Bonanni

Doping graphene with heteroatoms can alter the electronic and electrochemical properties of the starting material. Contrasting properties should be expected when the doping is carried out with electron donating species (n-type dopants) or with electron withdrawing species (p-type dopants). This in turn can have a profound influence on the electroanalytical performance of the doped material bein...

2016
Hossein Kamani Simin Nasseri Mehdi Khoobi Ramin Nabizadeh Nodehi Amir Hossein Mahvi

BACKGROUND Un-doped and N-doped TiO2 nano-particles with different nitrogen contents were successfully synthesized by a simple sol-gel method, and were characterized by X-ray diffraction, field emission scanning electron microscopy, Energy dispersive X-ray analysis and UV-visible diffuse reflectance spectra techniques. Then enhancement of sonocatalytic degradation of humic acid by un-doped and ...

Journal: :ACS nano 2011
Cary L Pint Zhengzong Sun Sharief Moghazy Ya-Qiong Xu James M Tour Robert H Hauge

We demonstrate the water-assisted supergrowth of vertically aligned single-walled carbon-nitrogen nanotubes (SWNNTs) using a simple liquid/gas-phase precursor system. In situ characterization of gas-phase nitrogen-containing precursors and their correlation to growth identifies HCN as the most active precursor for SWNNT growth, analogous to C(2)H(2) for single-walled carbon nanotubes (SWNTs). U...

Journal: :مجله دانشگاه علوم پزشکی کرمانشاه 0
leyla pasharavesh assistant professor in biostatistics in kermanshah university of medical sciences marziyeh ramandi assistant professor in biostatistics in kermanshah university of medical sciences sepideh khoshboo assistant professor in biostatistics in kermanshah university of medical sciences mansour rezaee associated professor in nephrology in tehran university of medical sciences. samina rezvani assistant professor in biostatistics in kermanshah university of medical sciences mohammad reza abbasi associated professor in nephrology in tehran university of medical sciences.

introduction: today sport is one of the important social criterion and athletes are trying to be a champion. therefore, there is an increase in misuse of doping agents especially anabolic-androgenic steroid. this study was carried out to determine the prevalence of the doping agents' abuse among male bodybuilders' and to access their knowledge about their side effects in kermanshah gymnasiums i...

Journal: :Physical chemistry chemical physics : PCCP 2015
Tokio Katoh Gaku Imamura Seiji Obata M Bhanuchandra Graeme Copley Hideki Yorimitsu Koichiro Saiki

Doping of heteroatoms such as nitrogen into the lattice structure of graphene can tune and tailor the overall electronic properties. N-doped graphene, depending on the nitrogen bonding mode and/or bonding configuration, displays subtly altered properties in comparison to pristine graphene. However, there remains a disappointing shortage of reliable methods for introducing dopants in a controlle...

Journal: :Journal of Energy Chemistry 2022

Nitrogen doping of the carbon is an important method to improve performance and durability catalysts for proton exchange membrane fuel cells by platinum–nitrogen carbon–nitrogen bonds. This study shows that p?phenyl groups graphitic N acting bridges linking platinum graphene/carbon black (the ratio = 2/3) hybrid support materials achieved average size nanoparticles with (4.88 ± 1.79) nm. It imp...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید