نتایج جستجو برای: visible light irradiation

تعداد نتایج: 507360  

Journal: :Nanoscale 2013
Wan-Sheng Wang Hong Du Rui-Xia Wang Tao Wen An-Wu Xu

A heterostructured Ag3PO4/AgBr/Ag plasmonic photocatalyst was prepared by a rational in situ ion exchange reaction between Ag3PO4 micro-cubes and Br(-) in aqueous solution followed by photoreduction. The photocatalytic activities of obtained photocatalysts were measured by the degradation of methyl orange (MO) and methylene blue (MB) under visible light irradiation (λ≥ 400 nm). Compared to AgBr...

In the present investigation, a ZnO nanostructure was synthesized by means of precipitation and sonochemical methods. The X-ray diffraction (XRD) pattern indicated that the wurtzite structure of ZnO had a hexagonal symmetry and there was no impurity. The average ZnO particles crystallite size was calculated at about 41 nm. The SEM and TEM images revealed nanostructure ZnO particles with a cauli...

Journal: :Materials advances 2022

Carbon dots were synthesized using solvent-free, microwave synthesis and photoreduction of methyl viologen was studied under visible wavelength light irradiation.

Journal: :Physical chemistry chemical physics : PCCP 2005
Ryo Niishiro Hideki Kato Akihiko Kudo

TiO2 (band gap = 3.0 eV) and SrTiO3 (band gap = 3.2 eV) codoped with nickel and either tantalum or niobium ions showed photocatalytic activities for O2 evolution from an aqueous silver nitrate solution and H2 evolution from an aqueous methanol solution under visible light irradiation (lambda > 420 nm). The visible-light responses were due to the charge-transfer transition from the electron dono...

Photo-oxidative stability of a series of most common red acrylic paints has been investigated. The paints in question were carmine, quinacridone scarlet, alizarin crimson, brilliant red, vermilion and cadmium red hue. Structural changes, discoloration and weight loss of paints film subjected to UV irradiation in an accelerated ageing chamber were measured using FT-IR spectroscopy, colorimetry a...

Journal: :Chemical communications 2009
Holger F Bettinger Matthias Filthaus Patrik Neuhaus

A borylnitrene, accessible from the corresponding azide by UV photolysis in a solid D(2) matrix at 3 K, inserts into D(2) upon visible light irradiation under cryogenic conditions.

Journal: :Dalton transactions 2007
Masahisa Osawa Hidetada Nagai Munetaka Akita

The mixed catalyst system, Pd(CH3CN)2Cl2/P(t-Bu)3/[Ru(2,2'-bipyridine)3].2PF6, promotes the copper-free Sonogashira coupling reaction of aryl bromides at room temperature under irradiation of visible light.

Journal: :Photochemical and Photobiological Sciences 2021

A green and sustainable nitrone formation reaction via visible-light-promoted of aryl diazoacetates with nitrosoarenes is described. This protocol exhibits good functional group tolerance broad substrate scope for both nitrosoarenes. Comparing the reported methods synthesis nitrones from nitrosoarenes, described herein occurs under sole visible-light irradiation without need any catalysts addit...

Hossein Safardoust-Hojaghan Masood Hamadanian, Masoud Salavati-Niasari, Mohammad Hassanpour, Seyed Alireza Mousavi

CeO2/ZnO nanocomposites were synthesized by microwave method that is the fast process. One of an eco-friendly solvent, ethylene glycol were used the effect of time and power of irradiation were investigated on morphology and size of nanoparticle. Prepared CeO2/ZnO nanocomposites are characterized with X-ray diffraction (XRD) analysis, Transmission Electron Microscopy (TEM), Fourier Transform In...

Journal: :Chemical communications 2013
Carmen R Maldonado Nina Gómez-Blanco Maite Jauregui-Osoro Valerie G Brunton Luis Yate Juan C Mareque-Rivas

The fac-[(99m)Tc(OH2)3(CO)3](+) complex reacts with QD-filled micelles to create a bimodal SPECT-optical imaging probe which upon visible light irradiation generates cisplatin from an inert Pt(IV) prodrug.

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