Thursday, 14 May 2015

Ankita Vijay and Shipra Bhardwaj led India to Grignard Research Award-2015 in Photocatalysis as World’s 500 Most Influential Chemists

Breaking News: Ankita Vijay and Shipra Bhardwaj led India to Grignard Research Award-2015 in Photocatalysis as World’s 500 Most Influential Chemists

Ankita Vijay and Shipra Bhardwaj led India to Grignard Research Award-2015 in Photocatalysis as World’s 500 Most Influential Chemists

14 May, 2015, India, USA NEWS CORP

 Photocatalysis, pseudo first order kinetic, scavenger, non toxic products International Journal of Photocatalysis Photon Journal  Photon Foundation Photocatalysis, pseudo first order kinetic, scavenger, non toxic products International Journal of Photocatalysis Photon Journal  Photon Foundation

Ankita Vijay and Shipra Bhardwaj, given the rock star fame in Photocatalysis, as declared among World’s 500 Most Influential Chemists for Year 2015 on Earth. In a worldwide meritorious competition, Ankita Vijay and Shipra Bhardwaj grabbed the world’s prestigious Grignard Research Award-2015 in Photocatalysis. Representing the great legacy of India, Ankita Vijay and Shipra Bhardwaj established the matter of proud to civilians of India. International Media is now seriously looking towards India, since Ankita Vijay and Shipra Bhardwaj made a remarkable historical achievement. Chemists are ensured that under the leadership of Ankita Vijay and Shipra Bhardwaj, millions of emerging intellectuals would be benefited and inspired around the world.

Dr. Shipra Bhardwaj is Lecturer in Chemistry at Government P.G. Meera Girls College, Udaipur, Rajasthan, India. She did her Post graduate with first class and specialization in Organic Chemistry in year 1989. After that she joined research at Mohal Lal Sukhadia University, Udaipur (Rajasthan) India and received the degree of Doctor of Philosophy in year 1992. In year 1994 she received the degree of Bachelor of Education. Involved in few research activities, she joined her job as lecturer in 1998. Gaining experience in the field of teaching, she was registered as research guide at Mohan Lal Sukhadia University in year 2003. Later on she was also registered as research guide at other universities and details are given below. Till now, eight students have been awarded the degree of Doctor of Philosophy under my supervision, one student has been awarded the master of philosophy degree and three students are pursuing their work. Her research field of interest is eco- friendly photocatalysis which tends to remove pollutants from water making it useful, that too via use of solar energy and the used catalyst is recovered back making the process cost effective.
She is a life member of Indian Chemical Society, Kolkata, India with membership number F/6536(LM). She is a life member of Indian Council of Chemist, Agra, India with membership number LF/886. She is a life member of Indian Science Congress
Being a research guide since year 2003, is continuously pursuing research work in field of Photocatalysis.
She is working as lecturer since 1998 at various government colleges in Rajasthan (INDIA). Also classes have been taken by me for Ph.D. course work made mandatory by U.G.C. before carrying out research work.
She Organized a conference at Chittorgarh, Rajasthan (India) sponsored by University Grants commission, New Delhi.

Ankita Vijay is Lecturer in Chemistry at Maharishi Arvind International Institute of Technology, Kota, Rajasthan, India. She has completed her Bachelor Degree in Science (Biology) from Janki Devi Bajaj Girls College, Kota University with 70% and Master degree in Chemistry (Organic) from Maa Bharti College, Kota University with 71%. Now she is Pursuing Ph.D. from Mewar Uhiversity, Chittore under the supervision of Dr. Shipra Bhardwaj.

Ankita Vijay and Shipra Bhardwaj from India made a historical victory over the international competition and won Grignard Research Award-2015 in Photocatalysis. Their research was highlighted in international media and gathered a large worldwide attention in scientific circles while it appeared in world's most read journal 'International Journal of Photocatalysis'. In their report on Removing colour pollutants from wastewater: Use of a novel nanosized ternary semiconductor Ba3Y2WO9 and measurement of kinetic parameters they mention that Photocatalysis, a part of advanced oxidation technology is considered as a promising technology for waste water treatment. In the present work attempt is made to degrade a dye Azure B using Barium Yttrium tungsten Oxide, as a photocatalyst. Effect of various rate affecting parameters like pH, concentration of dye, amount of semiconductor, intensity of light etc. have been investigated. The rate is monitored spectrophotometrically and on the basis of observed data, a tentative mechanism has been proposed which proves the reaction to be a photocatalytic one. Optimum conditions (pH 7.3, concentration of the dye 5×10-6M, amount of semiconductor 0.12, light intensity 37mW/cm2) for maximum degradation are extracted. The kinetic study suggests that the reaction follows pseudo-first order rate law. Formation of nontoxic degraded products like NO2, CO2, H2O etc. make the process of immense importance. Participation of OH free radical is confirmed by use of scavenger. The process is found beneficial for cleaning the hazards from environment that too in an eco friendly manner as it uses solar light and the semiconductor is in heterogeneous phase and is recovered back for further studies. Under their leadership the research area is surely likely to expand beyond the horizons. It will be worthy to explore the further potential under their legacy. Ankita Vijay and Shipra Bhardwaj as valuable intellectuals for the India offer exclusive opportunities for scholars around the world. One of the most attractive weightage for India is to have the awardees for promotion of the concerned scientific discipline for the benefit of its civilians. Thus India which has excellent track record to produce brain storming intellectuals, has offered a new extension in terms of Ankita Vijay and Shipra Bhardwaj to world.

It is concluded that dyes are being degraded, with the help of photocatalyst and in presence of visible light, into fragments and no harmful products are formed. In presence of light, dye molecule gets excited to its singlet state. Then by losing some energy through inter system crossing (ISC), it get converted to its triplet state.

On the other hand semiconductor absorbs photon and an electron from its valence band jumps to the conduction band leaving a hole behind. The hole abstracts an electron from OH- ion generating OH˙ free radical and the hole is quenched. This OH˙ free radical abstracts an electron from weaker site of the dye and a sequence of break down starts lastly converting the dye into fragments like H2O, CO2, NO2, NH3 etc. products. These products are of no harm or less harm to the environment. The photocatalyst is recovered which makes the process cost effective and useful.

Present work incorporates use of natural inexhaustible energy resource that is the solar energy which makes the process of immense importance. Furthermore the process involves heterogeneous photocatalysis where the photocatalyst is recovered back and can be used further for same purpose. This proves the process to be economic one.

Major factors affecting the rate of degradation were varied and the optimum conditions were extracted. Selected pH was 7.3 which is nearer to normal pH and so does not add another pouting factor that is the base to the water.

Due to environmental factors, the work faced some limitations which were as follows: The pH variation was limited to avoid the cause of secondary pollution as addition of base will make water more basic and another problem of removal this base will occur.

Higher light intensities were not used as the make the reaction occur through thermal way instead of photocatalytic one.

Higher concentrations of dye were not studied due to limitations of instrument which was not able to record the optical density above 0.9999.

Higher amount of semiconductor generated a problem of turbidity and was found floating on the surface. Thus weight was restricted.

Higher light intensities can be used if some arrangements can reduce the reaction caused by heat. Further semiconductors can be used with higher density so that they may settle down reducing the turbidity problem.

As the present work is an excellent addition to the way of cleaning the pollution in environment, it should be exposed and sent to several desks to gain attention and funds from various agencies. Various sectors must work in the path of removal of pollution through environmental factors like water, air, land etc.

It seems to be a great contribution in the field of removal of pollutants. One may carry out similar kind of work for removal of other kinds of pollutants like metal ions in water, organic living pollutants like bacteria etc. and may also study the effect of various other factors on the efficient removal of these pollutants. Use of sources other than solar light can also be incorporated. Instead of using inorganic semiconductors one can also use organic semiconductors and some natural substances like ash, charcoal etc.
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