نتایج جستجو برای: s photocatalyst

تعداد نتایج: 714812  

2014
Zhihua Zhou Pingan Zhang Yuelai Lin Eric Ashalley Haining Ji Jiang Wu Handong Li Zhiming Wang

Cu2ZnSnS4 nanoparticle with an average diameter of approximately 31 nm has been successfully synthesized by a time effective microwave fabrication method. The crystal structure, surface morphology, and microstructure of the Cu2ZnSnS4 nanoparticle were characterized. Moreover, the visible light photocatalytic ability of the Cu2ZnSnS4 nanoparticle toward degradation of methylene blue (MB) was als...

Journal: :Nanoscale 2014
Naixu Li Maochang Liu Zhaohui Zhou Jiancheng Zhou Yueming Sun Liejin Guo

Finding active sites for photocatalytic reduction and oxidation allows the mechanistic understanding of a given reaction, ensuring the rational design and fabrication of an efficient photocatalyst. Herein, using well-shaped Cu2WS4 decahedra as model photocatalysts, we demonstrated that photoinduced oxidative etching could be considered as an indication of the photooxidation reaction sites of ch...

2014
Nadia Riaz Mohamad Azmi Bustam Fai Kait Chong Zakaria B Man Muhammad Saqib Khan Azmi M Shariff

Bimetallic Cu-Ni/TiO2 photocatalysts were synthesized using wet impregnation (WI) method with TiO2 (Degussa-P25) as support and calcined at different temperatures (180, 200, and 300°C) for the photodegradation of DIPA under visible light. The photocatalysts were characterized using TGA, FESEM, UV-Vis diffuse reflectance spectroscopy, fourier transform infrared spectroscopy (FTIR) and temperatur...

2013
Min-Quan Yang Yanhui Zhang Nan Zhang Zi-Rong Tang Yi-Jun Xu

Selective activation of primary C-H bonds for fine chemicals synthesis is of crucial importance for the sustainable exploitation of available feedstocks. Here, we report a viable strategy to synthesize ternary GR-CdS-TiO2 composites with an intimate spatial integration and sheet-like structure, which is afforded by assembling two co-catalysts, graphene and TiO2, into the semiconductor CdS matri...

Journal: :Dalton transactions 2015
Davud Karimian Bahram Yadollahi Valiollah Mirkhani

Herein, the synthesis, characterization and photocatalytic application of a novel hybrid polyoxometalate, which can absorb light in the visible region, are reported. This hybrid material was synthesized by attaching a monovacant polyoxometalate, (SiW11O39), through a (3-aminopropyl)triethoxysilane linker to the anthracene. The hybridization with anthracene drastically decreased the band gap of ...

Journal: :Chemical science 2017
Hiromu Kumagai Go Sahara Kazuhiko Maeda Masanobu Higashi Ryu Abe Osamu Ishitani

A CuGaO2 p-type semiconductor electrode was successfully employed for constructing a new hybrid photocathode with a Ru(ii)-Re(i) supramolecular photocatalyst (RuRe/CuGaO2). The RuRe/CuGaO2 photocathode displayed photoelectrochemical activity for the conversion of CO2 to CO in an aqueous electrolyte solution with a positive onset potential of +0.3 V vs. Ag/AgCl, which is 0.4 V more positive in c...

M. Asghari, M. Feilizadeh M. Vosoughi S. M. E. Zakeri

A useful nanophotocatalyst (La,S-TiO2) was prepared by a sol-gel method and characterized by UV–vis diffuse reflectance spectroscopy (DRS), X-ray diffraction (XRD), photoluminescence emission spectroscopy (PL) and scanning electron microscopy (FESEM). The results showed that the La,S-TiO2, which calcined at 550 °C, contained only anatase phaseand its crystal size was 23 nm...

Journal: :Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology 2010
Anna Berlicka Burkhard König

A variety of primary and secondary benzylic amines were oxidized efficiently to N-benzylidenebenzylamines and imines, respectively, using 2,7,12,17-tetrapropylporphycene (H(2)TPrPc) photocatalyst and blue light emitting diodes (LEDs). The photooxidation of 4-methoxybenzylamine in the presence of H(2)TPrPc and its tin(IV) complex Sn(TPrPc)Cl(2) was studied in detail in order to show that operati...

Journal: :Chemical science 2015
James J Devery Iii James J Douglas John D Nguyen Kevin P Cole Robert A Flowers Ii Corey R J Stephenson

Knowledge of the kinetic behavior of catalysts under synthetically relevant conditions is vital for the efficient use of compounds that mediate important transformations regardless of their composition or driving force. In particular, these data are of great importance to add perspective to the growing number of applications of photoactive transition metal complexes. Here we present kinetic, sy...

Journal: :Nanoscale 2010
Adelaide Miranda Eliana Malheiro Elżbieta Skiba Pedro Quaresma Patrícia A Carvalho Peter Eaton Baltazar de Castro John A Shelnutt Eulália Pereira

A photocatalytic approach was used to synthesize triangular nanoplates in aqueous solution. The synthesis is based on the reduction of a gold salt using a tin(iv) porphyrin as photocatalyst, cetyltrimethylammonium bromide (CTAB) as a stabilizing agent, and triethanolamine (TEA) as the final electron donor. The average edge length of the triangular nanoplates can be easily changed in the range 4...

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