Phase-Compositional and Morphological Control of Titania Nanoparticles via Low Temperature Dissolution-Reprecipitation Process in Liquid Media

2002 ◽  
Vol 31 (6) ◽  
pp. 564-565 ◽  
Author(s):  
Shu Yin ◽  
Hitoshi Hasegawa ◽  
Tsugio Sato
Keyword(s):  
Low Temperature ◽  
Titania Nanoparticles ◽  
Liquid Media ◽  
Morphological Control

Bioproduction of ochratoxin A and penicillic acid by members of the Aspergillus ochraceus group

1972 ◽  
Vol 18 (5) ◽  
pp. 631-636 ◽  
Author(s):  
Alex Ciegler
Keyword(s):  
Quantitative Analysis ◽  
Low Temperature ◽  
Ochratoxin A ◽  
Acid Synthesis ◽  
Aspergillus Ochraceus ◽  
Cereal Grains ◽  
Liquid Media ◽  
Penicillic Acid ◽  
Group A ◽  
Fluorescent Derivatives

Various strains of species belonging to the Aspergillus ochraceus group (A. ochraceus, A. sclerotiorum, A. alliaceus, A. ostianus, A. melleus, and A. sulphureus) can produce two mycotoxins, ochratoxin A and penicillic acid, on liquid media and in cereal grains. The quantity of each toxin produced is influenced by temperature; low temperature (10 and 20C) favor penicillic acid synthesis and higher (28C), ochratoxin A production. Generally penicillic acid is produced in yields about one to three magnitudes greater than ochratoxin A. A simple fluorodensitometric method for concomitant quantitative analysis of the two toxins has been developed based on conversion of penicillic acid and ochratoxin A to fluorescent derivatives by treatment with ammonia fumes.

Morphological control and photodegradation behavior of rutile TiO2 prepared by a low-temperature process

2006 ◽  
Vol 60 (13-14) ◽  
pp. 1753-1757 ◽  
Author(s):  
Yuanyuan Li ◽  
Jinping Liu ◽  
Zhijie Jia
Keyword(s):  
Low Temperature ◽  
Rutile Tio2 ◽  
Morphological Control ◽  
Low Temperature Process

scholarly journals Hybrid Dye-Titania Nanoparticles for Superior Low-Temperature Dye-Sensitized Solar Cells

2018 ◽  
Vol 8 (12) ◽  
pp. 1702583 ◽  
Author(s):  
Andreas Kunzmann ◽  
Silvia Valero ◽  
Ángel E. Sepúlveda ◽  
Marisa Rico-Santacruz ◽  
Elena Lalinde ◽  
...  
Keyword(s):  
Solar Cells ◽  
Low Temperature ◽  
Dye Sensitized Solar Cells ◽  
Titania Nanoparticles ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

scholarly journals Low temperature-calcined TiO2 for visible light assisted decontamination of 4-nitrophenol and hexavalent chromium from wastewater

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Mohamed Eid M. Ali ◽  
Eman A. Assirey ◽  
Shimaa M. Abdel-Moniem ◽  
Hanan S. Ibrahim
Keyword(s):  
Low Temperature ◽  
Environmental Impact ◽  
Visible Light ◽  
Surface Area ◽  
Hexavalent Chromium ◽  
Quantum Effect ◽  
Reduction Rate ◽  
Active Species ◽  
Titania Nanoparticles ◽  
Impact Reduction

AbstractIn the present study, alkaline hydrothermally treated titania nanoparticles (TiO2-HT) are prepared and followed by calcination at different low temperatures to improve TiO2 activity under visible light. The prepared photocatalysts (PCs) are characterized by different tools. TiO2-HT is scrutinized for decontamination of para-nitrophenol (PNP) and hexavalent chromium ions (Cr6+ ions) under simulated sunlight. TiO2-HT-300 and TiO2-HT-400 PCs have nanosized particle with large surface area of 148 and 116.26 m2/g, respectively. Additionally, XRD and FTIR proved formation of nanocrystalline anatase TiO2. The different calcined TiO2-HT materials show lower adsorption capacity for PNP and Cr6+ ions. TiO2-HT-300 and HT-TiO2-400 PCs have higher reduction rate of PNP than that of uncalcined temperature titania (HT-TiO2-U) powder. Complete conversion of PNP is achieved at natural pH after 180 min over TiO2-HT-300. As well, TiO2-HT-300 exhibits a superior photocatalytic removal of Cr6+ ions. The enhanced photocatalytic efficacy is ascribed to the synergism between higher surface area and particle size (quantum effect) of TiO2-HT-300. As results, HO· radicals are the main key active species for the photocatalytic degradation of PNP over TiO2- HT-300 PC but contribution of O2– and h+ holes is minor. The used method for preparation of TiO2-HT-300 reduces the cost preparation as well as environmental impact reduction. Finally, low temperature-calcined TiO2 is promising visible light active and an efficient photocatalyst with lower environmental impact for detoxification of PNP and Cr6+ ions from water.

A comparison of solid and liquid media for resuscitation of starvation- and low-temperature-induced nonculturable cells of Aeromonas hydrophila

2000 ◽  
Vol 173 (4) ◽  
pp. 307-310 ◽  
Author(s):  
Sun N. Wai ◽  
Yoshimitsu Mizunoe ◽  
Akemi Takade ◽  
Shin-ichi Yoshida
Keyword(s):  
Low Temperature ◽  
Aeromonas Hydrophila ◽  
Liquid Media ◽  
Nonculturable Cells

Low temperature hydrogenation of carbon dioxide into formaldehyde in liquid media

2018 ◽  
Vol 309 ◽  
pp. 242-247 ◽  
Author(s):  
Fan Liang Chan ◽  
Garen Altinkaya ◽  
Nicholas Fung ◽  
Akshat Tanksale
Keyword(s):  
Carbon Dioxide ◽  
Low Temperature ◽  
Liquid Media ◽  
Hydrogenation Of Carbon Dioxide

Low-temperature cyaniding of structural steels in liquid media

1968 ◽  
Vol 10 (4) ◽  
pp. 257-260 ◽  
Author(s):  
V. V. Bogdanov ◽  
Yu. M. Lakhtin ◽  
G. N. Neustroev ◽  
A. I. Ryazanova
Keyword(s):  
Low Temperature ◽  
Structural Steels ◽  
Liquid Media

The effects of different acids on the preparation of TiO2 nanostructure in liquid media at low temperature

2008 ◽  
Vol 111 (2-3) ◽  
pp. 313-316 ◽  
Author(s):  
Zhenyao Wang ◽  
Dingguo Xia ◽  
Ge Chen ◽  
Tao Yang ◽  
Yu Chen
Keyword(s):  
Low Temperature ◽  
Liquid Media ◽  
Tio2 Nanostructure
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