TiO2 mediated photocatalytic inactivation of airborne bacteria

... TiO2 MEDIATED PHOTOCATALYTIC INACTIVATION OF AIRBORNE BACTERIA AMRITA PAL B ENGG (HONS.), JADAVPUR UNIVERSITY, INDIA A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF ... TiO2) on bacteria 11 2.3.1 Heterogeneous photocatalytic inactivation of bacteria in aqueous phase 13 2.3.2 Heterogeneous photocatalytic inactivation of bacteria in...

Ngày tải lên: 11/09/2015, 16:08

... following sequence: Si( 0.03) /TiO2 > Si( 0.01) /TiO2 > Si( 0.05) /TiO2 > TiO2 Fig The XRD patterns of pure and Si- doped TiO2 : (1) TiO2 ; (2) Si( 0.01) /TiO2 ; (3) Si( 0.03) /TiO2 ; (4) Si( 0.05) /TiO2 The difference ... of Si- doped TiO2 photocatalysts were prepared by hydrothermal process The photocatalytic activity of Si- doped TiO2 was higher...

Ngày tải lên: 20/03/2014, 13:06

... (2008) 146–153 Fig TEM images of undoped TiO2 (a), Eu-doped TiO2 (b) and Fe- and Eu-doped TiO2 (c) inant for undoped and Fe-doped TiO2 samples (Fig 2a) In Eu-doped TiO2 many elongated particles ... that of TiO2 , suggesting similar Fe and Ti surroundings in the doped and undoped samples In order to verify this statement, the filtered EXAFS of L Diamandescu et al / M...

Ngày tải lên: 20/03/2014, 13:08

... in TCNS5 and they are absent in TCNS0 which shows successful doping of nitrogen into the lattice of TiO2 [33,34] No peak corresponding to NH4+ absence (3189 and 1400 cm-1) shows that N is present ... towards visible region This shift in the absorption edge decreases the direct band gap of TCNS catalyst compared to undoped TiO2 (TCNS0) and this may be due to the insertion of...

Ngày tải lên: 26/03/2014, 00:20

... inactivation of bacteria on non- living surfaces by vacuum and atmospheric pressure plasmas will be presented A second part of the chapter will deal with state -of- the-art applications of non- thermal ... By comparing www.intechopen.com Inactivation of Bacteria by Non- Thermal Plasmas 31 the killing kinetics of UV radiation from a low pressure mercury-vapour la...

Ngày tải lên: 18/05/2014, 20:36

... demonstrated that SF6 gas totally inactivated the bacteria in only 1-3 minutes Conclusion Plasma inactivation using N2- O2 gas mixture and SF6 gas proved promising for the inactivation of the bacterial ... Experimental plasma conditions for the inactivation processes of 109 CFU/ml of different types of bacteria using N2- O2 plasma mixture Gas flow N2...

Ngày tải lên: 18/05/2014, 20:36

... tube, along the nozzle, and in the surrounding air The length of the plasma plume can reach as long as cm with helium as working gas To investigate the role of the charged particles in the inactivation ... range, are playing the main role in the inactivation process Finally, the measurements of the UV intensity show that the UV emission is too weak to...

Ngày tải lên: 18/05/2014, 20:36

... conduction band (CB) and the valence band (VB) of WO3 were higher than the CB and VB of TiO2 and fullerene When the hole and electron pairs were also generated and separated on the interface of WO3, ... Preparation, characterization and photocatalytic behavior of WO3-fullerene/TiO2 catalysts under visible light Nanoscale Research Letters 2011 6:459 Submit y...

Ngày tải lên: 21/06/2014, 01:20

... is devoted to the optimalization of the dual magnetron sputtering process for the low-T deposition of the TiO2 films The effect of the repetition frequency fr on the pulse waveforms, deposition ... strong influence of the film thickness h on their properties [6, 21] The thickness of the films was measured by a stylus profilometer DEKTAK with the resolution...

Ngày tải lên: 22/06/2014, 22:20

... PHOTOCATALYTIC DEGRADATION OF ORGANIC POLLUTANTS BY TIO2 CATALYSTS SUPPORTED ON ADSORBENTS BY ATREYEE BHATTACHARYYA (M SC., NUS) A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF ENGINEERING ... adsorption 300 10% TiO2- AlPC desorption 20% TiO2- AlPC adsorption 250 Volume (cc/g) (b) 20% TiO2- AlPC desorption 50% TiO2- AlPC adsorption 50% TiO2- AlPC desorption 200...

Ngày tải lên: 28/11/2015, 13:45

... reduce the effectiveness of disinfectants Therefore, in this study, we examined the effects of turbid substances in suspensions of C parvum oocysts on the degree of UV inactivation of the oocysts ... irradiation of C parvum oocysts in the presence of various substances Three substances were added to suspensions of C parvum oocysts and the...

Ngày tải lên: 05/09/2013, 09:08

... study indicate that MP UV irradiation is also very effective – possibly more effective – in inactivating G lamblia cysts in real field waters Meanwhile, the inactivation kinetics of G lamblia cysts ... than log10 inactivation was achieved within a UV dose of mJ/cm2 in both suspending media Also, it appears that the extent and kinetics of inactivation of...

Ngày tải lên: 05/09/2013, 09:08

... As for the system of UV irradiation, most conventional UV lamps are low pressure UV lamps (LPUV) while medium pressure UV lamps (MPUV) have also been used Previously, the application of LPUV was ... of LPUV, 0.9 log after 180 [mWs/cm2] of LPUV, and 0.4 log after 180 [mWs/cm2] of MPUV (ii) In samples after the exposure to LPUV or MPUV at the fluence of 180 and 600 [mWs/cm...

Ngày tải lên: 05/09/2013, 09:08

... SC -CO2 treatment on the inactivation of coliform bacteria in untreated water is shown in Figure The coliform bacterial count in the untreated water decreased almost linearly with increasing CO2/ sample ... flow rate and exposure time in the SC -CO2 treatment on the inactivation of coliform and total bacteria in untreated water and to propose the SC -CO2...

Ngày tải lên: 05/09/2013, 09:38

... 90% of their energy at a wavelength of 253.7 nanometers Exposure of bacteria to UV results in cross-linking of the thymine dimers of the DNA in the organism, preventing repair of injury and reproduction ... is among the main reasons for contamination in fruit juice Washing and brushing fruit before the juicing step is common in juice processing Acco...

Ngày tải lên: 25/10/2013, 21:20