Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:3.4.16.2 (PCP)
 3,761 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Photocatalysts Pt/TiO2 coated on hollow glass beads were prepared by tetrabutyl titanate hydrolysis with Sodium silicate on hollow glass beads at various condition and loaded with platinum varying from 0.2% to 2.4% by weight. Sodium pentachlorophenolate (PCP-Na) solution were used to examined for their photoactivity and characterized by X-ray and BET. The results indicated that the optimization condition to prepare photocatalysts: Water to titanium alkoxides was 100, Sintering temperature was 650 degrees C, Diameter of hollow glass beads was 0.5 mm, TiO2: sodium silicate: hollow glass beads was 10:2.5:20, Platinum content of photocatalysts was about 1.4%-1.6%. When the experiments were carried out in such conditions, the initial concentration of PCP-Na was 100 mg/L, initial pH was 6.5, oxygen flux was 1.6 mL/s, illumination intensity was 30 kW.m-2, catalysts was 2 g/L, illumination time was 2 hours, respectively. Then the rates removals of PCP-Na could reach 92.0%.
 ...
PMID:[Tetrabutyl titanate hydrolysis prepared TiO2 photocatalysis loaded with platinum technology]. 1198 10

In the present study the photocatalytic degradation of a toxic priority pollutant, PCP, in the presence of N-F codoped TiO2 was explicitly investigated. The efficiency of the process to remove PCP was monitored for the first time through combined evaluation of several aspects: the kinetic study of the PCP degradation, identification of transformation products by a combination of mass spectrometric techniques (HR-LC-MS and GC-MS), assessment of total mineralization during the process, and evaluation of the genotoxicity and ecotoxicity of the initial and treated solutions applying the cytokinesis block micronucleus (CBMN) assay and Microtox assay, respectively. On the basis of identified products, a proposed degradation pathway is presented, involving mainly oxidative dechlorination reactions. Genotoxicity and ecotoxicity studies clearly demonstrated the efficiency of the photocatalytic process in the detoxification as well as in the elimination of genotoxicity and cytotoxicity of the irradiated solutions.
...
PMID:Photocatalytic degradation of pentachlorophenol by N-F-TiO2: identification of intermediates, mechanism involved, genotoxicity and ecotoxicity evaluation. 2526 36

A series of graphene-TiO2 photocatalysts was synthesized by doping TiO2 with graphene oxide via hydrothermal treatment. The photocatalytic capability of the catalysts under ultraviolet irradiation was evaluated in terms of sodium pentachlorophenol (PCP-Na) decomposition and mineralization. The structural and physicochemical properties of these nanocomposites were characterized by X-ray diffraction, N2 adsorption-desorption, transmission electron microscopy, scanning electron microscopy, Ultraviolet-visible diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy, electron paramagnetic resonance spectra, and Fourier-transform infrared spectroscopy. The graphene-TiO2 nanocomposites exhibited higher photocatalytic efficiency than commercial P25 for the degradation of PCP-Na, and 63.4% to 82.9% of the total organic carbon was fully mineralized. The improved photocatalytic activity may be attributed to the accelerated interfacial electron-transfer process and the significantly prolonged lifetime of electron-hole pairs imparted by graphene sheets in the nanocomposites. However, excessive graphene and the inhomogeneous aggregation of TiO2 nanoparticles may decrease photodegradation efficiency.
...
PMID:Graphene TiO2 nanocomposites with high photocatalytic activity for the degradation of sodium pentachlorophenol. 2528 56