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Kinetics of ultrasonic disinfection of Escherichia coli in the presence of titanium dioxide particles. Kubo M(1), Onodera R, Shibasaki-Kitakawa N, Tsumoto K, Yonemoto T. Author information: (1)Department of Chemical Engineering and Biomolecular Engineering, Tohoku University, Aoba-yama 6-6-07, Sendai 980-8579, Japan.


The reaction rate was found to obey pseudo first-order kinetics represented by the Langmuir-Hinshelwood model. In the mineralization study, TNT (30 mg/l) photocatalytic degradation resulted in an approximately 80% TOC decrease after 150 min, and 10% of acetate and 57% of formate were produced as the organic intermediates, and were further degraded.


Kinetics of the gas/solid heterogeneous photocatalytic oxidation of dilute trichloroethylene (TCE) vapors by ultraviolet-illuminated titanium dioxide have been determined using a fixed-bed dynamic photoreactor. Reaction rate dependences on inlet TCE, oxygen and water vapor concentrations were found to consist of both reactant sensitive and ...


In situ heat-flow calorimetry, powder X-ray diffraction, and X-ray diffraction analysis are used to study titanium dioxide formation under hydrothermal conditions. The effect of the chemical history on the formation mechanism and micromorphology of the resulting nanocrystalline TiO2 …


Titanium dioxide (TiO2) semiconductor nanoparticles are one kind of important and promising photocatalysts in photocatalysis because of their unique optical and electronic properties. Their properties, which are determined by the preparation method, are very crucial in photocatalysis. In this chapter, an overview was carried out on the different methods that are …


Amongst all, titanium dioxide (TiO2) is the most widely used semiconductor particle in structural materials with photocatalytic activity because of …


Chen, X. & Mao, S. S. Titanium dioxide nanomaterials: synthesis, properties, modifications, and applications. ... S. et al. Boosting oxygen evolution kinetics by Mn-N-C motifs with tunable spin ...


Titanium dioxide (TiO 2) nanoparticles (NPs) are manufactured worldwide in large quantities for use in a wide range of applications.TiO 2 NPs possess different physicochemical properties compared to their fine particle (FP) analogs, which might alter their bioactivity. Most of the literature cited here has focused on the respiratory system, showing the importance of …


The aim of the study was to investigate the degradation kinetics of tetracycline antibiotic by nanosized titanium dioxide under ultraviolet irradiation. Enhancement of photocatalysis by addition of Hydrogen peroxide was also evaluated. Various experimental parameters such as initial tetracycline concentrations, initial titanium dioxide concentration, …


The kinetics of photooxidation to CO 2 of 22 organic solutes over a UV illuminated film of Degussa P25 titanium dioxide have been studied over a 100-fold concentration range for each solute, generally from about 1 to 100 mg liter −1.The dependence of the photooxidation rate on concentration obeyed a simple two-coefficient Langmuir expression for each solute.


Mullite transformation kinetics of sol-gel-derived diphasic mullite gels doped with P 2 O 5, TiO 2, and B 2 O 3 were studied using quantitative X-ray diffraction and differential thermal analysis (DTA). The mullite transformation temperature initially increased with P 2 O 5 doping because of phase separation and formation of α-alumina and cristobalite. In TiO 2-doped …


The shuttling of polysulfides with sluggish redox kinetics has severely retarded the advancement of lithium–sulfur (Li–S) batteries. In this work oxygen …


Thermodynamics and kinetics coupling model is proposed to predict Tl sorption behavior. Three complexes TiOTl, TiOHTl +, and TiOTlOH-are formed on the titanium dioxide.. TiOHTl + is the dominant species under neutral and weakly alkaline conditions.. The species TiOTlOH-dominates Tl(I) complexes in strongly alkaline environments.. The characteristics of the complexes affect …


The dissolution kinetics of TiO 2 powders in HF-HCl solutions was studied as a function of time, temperature, and acid concentration. The rate of dissolution was linear with time, directly proportional to [HF], independent of [HCl], and exhibited an exponential temperature dependence with an activation energy of 74.9 kj/mol.


Kinetics, Selectivity, and Deactivation in the Aldol Condensation of Acetaldehyde on Anatase Titanium Dioxide July 2010 Industrial & Engineering Chemistry Research 50(1)


Ubiquitous titania electrodes: The electrochemistry of nanostructured titanium dioxide electrodes is reviewed with a focus on the fundamental aspects that determine their behavior both in the dark and under illumination (see picture). Some applications in the fields of environmental remediation (heterogeneous photocatalysis), and energy saving (electrochromism), generation …


Kinetics and Thermodynamics of Lysozyme Adsorption on Mesoporous Titanium Dioxide Qi-Liang HONG 1,Yi-Hui DONG 1,Wei ZHUANG 2,Chao RAO 1,Chang LIU 1, *( ) 1 State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Technology University, Nanjing 210009, P. R. China 2 School of Biological and Pharmaceutical Engineering, Nanjing ...


Investigation of sintering kinetics, in particular, thermal stability and long-time durability, is vital for the rational design of practical catalysts but remains a challenge. Various oxides have been used as supports to disperse and stabilize metal particles. Among others, titanium dioxide has


Titanium dioxide nanoparticles model growth kinetic traits of some wheat cultivars under different water regimes. Mona F. A. Dawood 1, Amany H. A. Abeed 1 & Eman E. S. Aldaby 1 Plant Physiology Reports volume 24, pages 129–140 (2019)Cite this article


Abstract Amitrole (3-amino-1H-1,2,4-triazole or aminotriazole) is a widely employed herbicide with strong estrogenic activity that can lead to abnormalities of the thyroid gland and cause mutations. Photocatalytic degradation conditions of amitrole in titanium dioxide (TiO2)-suspended solution were optimized under sunlight irradiation. The effect of various factors, …


Using titanium dioxide as the photo catalyst, the kinetics of the total oxidation of methane, ethane, ethene, as well as propene, have been investigated using a continuous-stirred tank reactor. In the experiments, the hydrocarbon concentrations, the oxygen concentration, and the irradiation intensity were varied.


In this paper, TiO2/Ag2V4O11 nanoheterojunctions have been synthesized by hydrothermal methods, which show enhanced photocatalytic activity compared to TiO2 under visible light. Moreover, the TiO2/Ag2V4O11 nanoheterojunction with set molar ratio of 2:1, referred to as TA2, show the highest visible light photocatalytic activity, which could …


Photocatalytic Water Treatment by Titanium Dioxide: Recent Updates Manoj A. Lazar 1,2,*, Shaji Varghese 3 and Santhosh S. Nair 1,2 ... Photocatalytic degradation kinetics of pollutants by NTO is a topic of debate and the mostly reporting Langmuir-Hinshelwood kinetics must


Poriferous TiO2/GO (denoted as TGO-x%) photocatalysts with ultrathin grapheme oxide (GO) layer were prepared by a hydrothermal method, the adsorption and photocatalytic degradation and its kinetics about Methylene …


As metal oxide reduction may be a limiting or otherwise important step in a reaction cycle, a complete description of the kinetics of the reduction can be critical to the successful choice of catalytic material. Unfortunately, such information is often lacking. Such is the case in our attempts to develop a catalytic cycle from the stoichiometric reductive carbonyl coupling …


P. Zhang, R. Scrudato, J. Pagano and R. Roberts, Photodecomposition of PCBs in aqueous systems using titanium dioxide as catalyst, Chemo.sphere 26(6), 1213-1223 (1993). 14. J. R. Chiarenzelli, R. Scrudato, D. Rafferty, R. Roberts and J. Pagano, Photodecomposition of PCBs absorbed on sediment and industrial waste-implications for photocatalytic ...


Kinetics of Photocatalyzed Gas Reactions Using Titanium Dioxide as the Catalyst Part II: Photocatalyzed Total Oxidation of Alkanes with Oxygen September 2004 Chemical Engineering & Technology 27(9 ...


Simple sol-gel route was used to synthesis the TiO2 nanoparticles and examined by X-ray diffraction (XRD). The small particle size and uniform morphology of the TiO2 were found at different calcination temperatures. The kinetic study of phase changes from the anatase to rutile using the X-ray diffraction data with Avrami equation was investigated.