Formation of predominant interstitial N-TiO2 using physical preparation under microwave irradiation for Reactive Red 4 dye removal

2017 ◽  
Vol 92 ◽  
pp. 172-180 ◽  
Author(s):  
M.S. Azami ◽  
◽  
W.I. Nawawi ◽  
D.S.M. Shukri
Keyword(s):  
Microwave Irradiation ◽  
Dye Removal ◽  
Reactive Red 4 ◽  
Physical Preparation

scholarly journals Preparation of Alpinia galangaStem Based Activated Carbon via Single-step Microwave Irradiation for Cationic Dye Removal

2021 ◽  
Vol 50 (8) ◽  
pp. 2251-2269
Author(s):  
N.A. Ahammad ◽  
M.F.M. Yusop ◽  
A.T. Mohd Din ◽  
M.A. Ahmad
Keyword(s):  
Activated Carbon ◽  
Microwave Irradiation ◽  
Surface Area ◽  
Dye Removal ◽  
Pore Diameter ◽  
Focal Point ◽  
Radiation Power ◽  
Single Step ◽  
Bet Surface Area ◽  
Cationic Dye

The focal point of this study is to synthesis Alpinia galanga Stem-based activated carbon (AGSAC) by using single-step microwave irradiation and testing it for the removal of cationic dye, methylene blue (MB) from aqueous solution. AGSAC was prepared under the flow of carbon dioxide (CO2) for the gasification effect. The factors of contact time (from 0 to 24 h) and initial concentration (25-300 mg/L) on the adsorption performance of AGSAC were studied. With the aid of response surface methodology (RSM) via face-centered composite design (FCD), optimum preparation conditions for AGSAC were found to be 400 W for radiation power and 4 min for activation time, respectively, which resulted in 95.67% of MB dye removal. The optimized AGSAC has a Bruneaur-Emmet-Teller (BET) surface area of 172.19 m2/g, mesopore surface area of 103.32 m2/g, a total pore volume of 0.1077 cm3/g, and fixed carbon content of 47.63%. The pore diameter of AGSAC was found to be a mesoporous type with a pore diameter of 2.50 nm. Freundlich isotherm and pseudo-second-order were found as the best-fitted model for MB adsorption equilibrium and kinetic respectively onto prepared AGSAC. Intraparticle diffusion was found to be the rate-limiting step.

Modification and characterization of microwave assisted N doped TiO2 – a photodegradation study under suspension and immobilized system

2015 ◽  
Vol 52 (1) ◽  
pp. 51-63 ◽  
Author(s):  
W. I. Nawawi ◽  
M. S. Azami ◽  
L. S. Ang ◽  
M. A. M. Ishak ◽  
K. Ismail
Keyword(s):  
Microwave Irradiation ◽  
Visible Light ◽  
Photoelectron Spectroscopy ◽  
Band Gap Energy ◽  
Conventional Heating ◽  
Spectroscopy Analysis ◽  
Doped Tio2 ◽  
Visible Light Active ◽  
Reactive Red 4

A commercially available TiO2 (P25) was modified to produce nitrogen (N) doped TiO2 prepared by mixing TiO2 powder with various amounts of urea as N precursor using a microwave irradiation heating technique. X-ray photoelectron spectroscopy analysis showed that N chemically bonded with TiO2 produces Ti-N. The measured band gap energy (Eg) of the modified sample was ca. 2.9 eV as detected by UV-Vis/DRS. The optimum modified N doped TiO2 denoted as U3-800 prepared at 230 °C showed an active visible light photoactivity. This observation shows that microwave irradiation is able to form Ti-N at low temperature whereas this previously could not be achieved under conventional heating using a muffle furnace at the same temperature. U3-800 showed visible light active photodegradation for 30, 10 and 5 mg L−1 of reactive red 4, crystal violet and Janus green dyes, respectively, in less than 105 min to complete decolorization under suspension mode while no photocatalytic activity was observed under pristine TiO2 under the same conditions. Immobilization of a U3-800 sample was carried out using DSAT as a thin layer binder and the photoactivity of Immobilize/U3-800/DSAT is comparable with the suspension mode. Surprisingly, immobilized/U3-800 has a strong coating with glass support material and can be continuously used for 30 cycles without affecting photoactivity performance.

Eco-Friendly Synthesis of Pyrazoline Derivatives

2017 ◽  
Vol 9 (04) ◽  
Author(s):  
Mahesh G. Kharatmol ◽  
Deepali Jagdale
Keyword(s):  
Ionic Liquids ◽  
Microwave Irradiation ◽  
Organic Synthesis ◽  
Ultrasonic Irradiation ◽  
Minimal Energy ◽  
Anticancer Activities ◽  
Conventional Methods

Pyrazoline class of compounds serve as better moieties for an array of treatments, they have antibacterial, antifungal, antiinflammatory, antipyretic, diuretic, cardiovascular activities. Apart from these they also have anticancer activities. So, pertaining to its importance, many attempts are made to synthesize pyrazolines. Since conventional methods of organic synthesis are energy and time consuming. There are elaborate pathways for green and eco-friendly synthesis of pyrazoline derivatives including microwave irradiation, ultrasonic irradiation, grinding and use of ionic liquids which assures the synthesis of the same within much lesser time and by use of minimal energy

DYE REMOVAL CAPACITY OF GRAPHENE OXIDE-IRON NANO PARTICLE COMPOSITE AS AN ADSORBENT

2018 ◽  
Author(s):  
Jyoti N. Thakre Sanjay R. Thakre P.T.Kosankar Kavita Gour Jyoti N. Thakre Sanjay R. Thakre P.T.Kosankar Kavita Gour ◽  
Keyword(s):  
Graphene Oxide ◽  
Dye Removal ◽  
Nano Particle ◽  
Particle Composite ◽  
Removal Capacity

РОЛЬ ФИЗИЧЕСКОЙ РАЗМИНКИ В ПОДГОТОВКЕ К ТРЕНИРОВОЧНЫМ ЗАНЯТИЯМ И СОРЕВНОВАНИЯМ ШАХМАТИСТОВ БГУ

2019 ◽  
pp. 63-65
Author(s):  
Судоргин Е.П. ◽  
Карсакова И.Н.
Keyword(s):  
Experimental Data ◽  
Sport Performance ◽  
Warm Up ◽  
Physical Exercises ◽  
Methods Of Evaluation ◽  
Mental Fitness ◽  
Physical Preparation ◽  
Tools And Methods

Аннотация: О роли разминки перед тренировкой и соревнованиями написано много научных статьей и диссертаций. Ещё больше о значимости физической подготовки спортсменов, в том числе и шахматистов. В то же время авторы считают, что вопросу физической подготовки шахматистов и в частности разминке в научной и научно-методической литературе уделяется недостаточно внимания. В своей статье авторы приводят собственные экспериментальные данные о влиянии физических упражнений (разминки) на умственную работоспособность студентов-шахматистов БГУ и как следствие на спортивные результаты команды. Ключевые слова: Шахматы, разминка, умственная работоспособность, средства и методы разминки, методы оценки результатов. Аннотация: Машыгуунун жана мелдештердин алдында даярдоонун ролу жөнүндө көптөгөн илимий макала жана диссертация жазылган. Ошондой эле илимий жана илимий-методикалык адабияттарда шахматка даярдоого көп көңүл бурулбай жатат. Макаланын авторлору шахмат ойногон студенттерге физикалык көнүгүүлөрдүн тийгизген таасири жөнүндө өздөрүнүн эксперименталдык маалыматтарын көргөзүштү. Түйүндүү сөздөр: Шахмат, акыл-дарамет, курулуштар жана ыкмалар, баа берүү жыйынтыгы боюнча кабыл алынат. Abstract: on the role of warm-up before training and competitions written many scientific articles and theses. More about the significance of the physical preparation of athletes, including players. At the same time, the authors believe that the issue of fit- ness players and in particular workout in scientific and scientific-methodical literature neglected. In his article the authors cite their own experimental data on the influence of physical exercises (warm-up) on the mental fitness of students-BSU players and as a result the sport performance team. Keywords: chess, warm-up, mental fitness, workout tools and methods, methods of evaluation results.

Growth Process of SiC Grains Prepared by High-energy Microwave Irradiation

2014 ◽  
Vol 29 (2) ◽  
pp. 149-154 ◽  
Author(s):  
Shan HUANG ◽  
Ji-Gang WANG ◽  
Song LIU ◽  
Fan LI
Keyword(s):  
Microwave Irradiation ◽  
Growth Process ◽  
High Energy

Atom Transfer Radical Copolymerization of Acrylamide Under Microwave Irradiation

2013 ◽  
Vol 30 (4) ◽  
pp. 398
Author(s):  
Wei DING ◽  
Ling WANG ◽  
Tao YU ◽  
Guangmiao QU ◽  
Xiang GAO ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Radical Copolymerization ◽  
Atom Transfer
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