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 : Rahul Vaish (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
Monisha Rastogi,H.S. Kushwaha,Rahul Vaish 대한금속·재료학회 2016 ELECTRONIC MATERIALS LETTERS Vol.12 No.2
This study investigates BaTiO3 decorated reduced graphene oxide sheetsas a potential visible light active catalyst for dye degradation (RhodamineB). The composites were prepared through conventional hydrothermalsynthesis technique using hydrazine as a reducing agent. A number oftechniques have been employed to affirm the morphology, compositionand photocatalytic properties of the composites; these include UV-visiblespectrophotoscopy that assisted in quantifying the concentration differenceof Rhodamine B. The phase homogeneity of the composites was examinedthrough x-ray powder diffraction (XRD) and high resolution transmissionelectron microscopy (HRTEM) was employed to confirm the orientationof the BaTiO3 particles over the reduced graphene oxide sheets. Photoluminescence (PL) emission spectra assisted in determining thesurface structure and excited state of the catalyst. Fourier transformedinfrared(FTIR) spectra investigated the vibrations and adsorption peak of the composites, thereby ascertaining the formation ofreduced graphene oxide. In addition, diffuse reflectance spectroscopy (DRS) demonstrated an enhanced absorption in the visibleregion. The experimental investigations revealed that graphene oxide acted as charge collector and simultaneously facilitatedsurface adsorption and photo-sensitization. It could be deduced that BaTiO3-reduced graphene oxide composites are ofsignificant interest the field of water purification through solar photocatalysis.
-
Antibacterial ferroelectric materials: Advancements and future directions
Sandeep Kumar,Moolchand Sharma,Till Frömling,Rahul Vaish 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.97 No.-
Ferroelectric functional materials are known for a wide range of applications including sensors, actuators,energy harvesting devices. Very recent studies based on ferroelectric materials for environmentalcleaning and bacterial remediation add a further up-and-comingfield of application of these materials. They possess several advantages over conventional methods such as biocompatible range andsustainability. Although the research area is relatively new, some substantial experimental work hasbeen done in the last couple of years. The rationale and underlying mechanisms of different publishedreports were compiled and explained to offer a better understanding of the subject. The three majormechanisms can be divided into catalysis via a change in surface potential, mediated catalysis by theformation of reactive oxide species on the ceramic surface due to piezoelectric or pyroelectric excitation,and enhanced photocatalysis due to internal electricfields. Our goal is to provide a comprehensive reporton ferroelectric materials application in the prevention of bacterial infections and to give an outlook onfurther possible research strategies.
-
Bismuth zinc borate- Polyacrylonitrile nanofibers for photo-piezocatalysis
Chirag Porwal,Sahil Verma,Vishal Singh Chauhan,Rahul Vaish 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.124 No.-
This study investigates the use of an electrospun membrane composed of Bi2ZnB2O7 - Polyacrylonitrile(BBZO-PAN) for the degradation of Methylene blue (MB) dye. The membrane was fabricated using theelectrospinning technique, and its structural and morphological properties were analyzed using X-raydiffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy(FE-SEM), and high-resolution transmission electron microscopy (HR-TEM). The membrane’schemical states before and after encapsulation of BBZO in PAN matrix were analyzed using X-ray photoemissionspectroscopy (XPS). The optical studies revealed that the band gap of the BBZO-PAN membranewas 2.92 eV, which is lower than that of the PAN membrane (4.06 eV), due to the presence of BBZO in thePAN matrix. The prepared membrane demonstrated the capability to degrade dye under visible light irradiationvia photocatalysis, piezocatalysis, and photo-piezocatalysis. The highest achieved degradationand kinetic rate constant were 82% and 8.8*10-3 min1, respectively. The active species responsible fordegradation were identified using scavenger tests for all catalytic processes. These results demonstratethe potential of the BBZO-PAN membrane for use in wastewater treatment and other environmentalapplications.
-
Rapid bacterial disinfection using low frequency piezocatalysis effect
Sandeep Kumar,Moolchand Sharma,Anuruddh Kumar,Satvasheel Powar,Rahul Vaish 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.77 No.-
The present work is the systematic study of ferrocatalysis, ferro-photocatalysis, piezocatalysis and piezophotocatalysiseffects for bacterial degradation. The investigation revealed the ferrocatalysis drivenbacterial degradation rate can be improved with incorporation of light of suitable wavelength, vibrationand combination of both. Complete bacterial disinfection was achieved through piezo-photocatalysiseffect using poled BaTiO3 (BT) ceramic within 30 min of exposure. Bacterial degradation was observedusing surface potential generated on the surface of BT during mechanical vibration. Interestingly, it wasfound that lower frequency (8 Hz) was able to develop sufficient voltage to trigger bactericidal effect. Scanning electron microscopy was used to study effect of catalytic processes on the morphology ofbacterial cells.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
