scholarly journals Correction to ‘Photocatalytic inactivation of Escherichia coli under UV light irradiation using large surface area anatase TiO 2 quantum dots’

2020 ◽  
Vol 7 (1) ◽  
pp. 192176
Author(s):  
Faheem Ahmed ◽  
Chawki Awada ◽  
Sajid Ali Ansari ◽  
Abdullah Aljaafari ◽  
Adil Alshoaibi
Keyword(s):  
Escherichia Coli ◽  
Quantum Dots ◽  
Surface Area ◽  
Uv Light ◽  
Large Surface Area ◽  
Light Irradiation ◽  
Photocatalytic Inactivation ◽  
Uv Light Irradiation

scholarly journals Photocatalytic inactivation of Escherichia coli under UV light irradiation using large surface area anatase TiO 2 quantum dots

2019 ◽  
Vol 6 (12) ◽  
pp. 191444
Author(s):  
Faheem Ahmed ◽  
Chawki Awada ◽  
Sajid Ali Ansari ◽  
Abdullah Aljaafari ◽  
Adil Alshoaibi
Keyword(s):  
Escherichia Coli ◽  
Quantum Dots ◽  
Specific Surface ◽  
Band Gap ◽  
Surface Area ◽  
Ultraviolet Light ◽  
Light Irradiation ◽  
Rapid Synthesis ◽  
E Coli ◽  
Photocatalytic Inactivation

In this study, high specific surface areas (SSAs) of anatase titanium dioxide (TiO 2 ) quantum dots (QDs) were successfully synthesized through a novel one-step microwave–hydrothermal method in rapid synthesis time (20 min) without further heat treatment. XRD analysis and HR-TEM images showed that the as-prepared TiO 2 QDs of approximately 2 nm size have high crystallinity with anatase phase. Optical properties showed that the energy band gap ( E g ) of as-prepared TiO 2 QDs was 3.60 eV, which is higher than the standard TiO 2 band gap, which might be due to the quantum size effect. Raman studies showed shifting and broadening of the peaks of TiO 2 QDs due to the reduction of the crystallite size. The obtained Brunauer–Emmett–Teller specific surface area (381 m 2 g −1 ) of TiO 2 QDs is greater than the surface area (181 m 2 g −1 ) of commercial TiO 2 nanoparticles. The photocatalytic activities of TiO 2 QDs were conducted by the inactivation of Escherichia coli under ultraviolet light irradiation and compared with commercially available anatase TiO 2 nanoparticles. The photocatalytic inactivation ability of E. coli was estimated to be 91% at 60 µg ml −1 for TiO 2 QDs, which is superior to the commercial TiO 2 nanoparticles. Hence, the present study provides new insight into the rapid synthesis of TiO 2 QDs without any annealing treatment to increase the absorbance of ultraviolet light for superior photocatalytic inactivation ability of E. coli .

scholarly journals TiO2-Powdered Activated Carbon (TiO2/PAC) for Removal and Photocatalytic Properties of 2-Methylisoborneol (2-MIB) in Water

Water ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1622
Author(s):  
Xiao-Pin Guo ◽  
Peng Zang ◽  
Yong-Mei Li ◽  
Dong-Su Bi
Keyword(s):  
Activated Carbon ◽  
Natural Organic Matter ◽  
Uv Light ◽  
Sol Gel ◽  
Light Irradiation ◽  
Nano Tio2 ◽  
Uv Light Irradiation ◽  
Adsorption Capacities ◽  
Taste And Odor ◽  
Composite Photocatalysts

2-methylisoborneol (2-MIB) is a common taste and odor compound caused by off-flavor secondary metabolites, which represents one of the greatest challenges for drinking water utilities worldwide. A TiO2-coated activated carbon (TiO2/PAC) has been synthesized using the sol-gel method. A new TiO2/PAC photocatalyst has been successfully employed in photodegradation of 2-MIB under UV light irradiation. In addition, the combined results of XRD, SEM-EDX, FTIR and UV-Vis suggested that the nano-TiO2 had been successfully loaded on the surface of PAC. Experimental results of 2-MIB removal indicated that the adsorption capacities of PAC for 2-MIB were higher than that of TiO2/PAC. However, in the natural organic matter (NOM) bearing water, the removal efficiency of 2-MIB by TiO2/PAC and PAC were 97.8% and 65.4%, respectively, under UV light irradiation. Moreover, it was shown that the presence of NOMs had a distinct effect on the removal of MIB by TiO2/PAC and PAC. In addition, a simplified equivalent background compound (SEBC) model could not only be used to describe the competitive adsorption of MIB and NOM, but also represent the photocatalytic process. In comparison to other related studies, there are a few novel composite photocatalysts that could efficiently and rapidly remove MIB by the combination of adsorption and photocatalysis.

Photocatalytic performance of Cu-doped titania thin films under UV light irradiation

2021 ◽  
Vol 553 ◽  
pp. 149535
Author(s):  
Elisa Moretti ◽  
Elti Cattaruzza ◽  
Cristina Flora ◽  
Aldo Talon ◽  
Eugenio Casini ◽  
...  
Keyword(s):  
Thin Films ◽  
Photocatalytic Performance ◽  
Uv Light ◽  
Light Irradiation ◽  
Uv Light Irradiation ◽  
Doped Titania

Amino acid-templated zinc phosphites: low-dimensional structures, fluorescence, and nonlinear optical properties

2021 ◽  
Author(s):  
Yumei Mao ◽  
Xuehua Dong ◽  
Yuandan Deng ◽  
Jing Li ◽  
Ling Huang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Amino Acid ◽  
Nonlinear Optical ◽  
Uv Light ◽  
Nonlinear Optical Properties ◽  
Light Irradiation ◽  
Blue Fluorescence ◽  
Structure Directing Agent ◽  
Uv Light Irradiation ◽  
Low Dimensional

Two new zinc phosphites were prepared using the amino acid alanine as structure-directing agent. They have tubular and ladder-like structures exhibiting blue fluorescence upon UV light irradiation. Notably, the tubular...

Photodegradation of Polychlorinated Dibenzo-p-dioxins in Liquid Samples by Near UV Light Irradiation

1996 ◽  
Vol 54 (4) ◽  
pp. 331-337 ◽  
Author(s):  
M.Perla Colombini ◽  
Fabio Di Francesco ◽  
Roger Fuoco
Keyword(s):  
Uv Light ◽  
Light Irradiation ◽  
Liquid Samples ◽  
Uv Light Irradiation

scholarly journals Synthesis of Amorphous CS2 by UV Light Irradiation

1997 ◽  
Vol 105 (1219) ◽  
pp. 272-274
Author(s):  
Yutaka TAKAHASHI ◽  
Shigeo KOTAKE ◽  
Toshihiko OHTA ◽  
Akihito MATSUMURO ◽  
Masafumi SENOO
Keyword(s):  
Uv Light ◽  
Light Irradiation ◽  
Uv Light Irradiation
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