Photocatalytic hydrogenation of azobenzene to hydrazobenzene on cadmium sulfide under visible light irradiation

2018 ◽  
Vol 54 (5) ◽  
pp. 452-455 ◽  
Author(s):  
Yasuhiro Shiraishi ◽  
Miyu Katayama ◽  
Masaki Hashimoto ◽  
Takayuki Hirai

Visible light irradiation of commercially-available CdS in alcohol successfully promotes selective azobenzene-to-hydrazobenzene reduction, where surface S vacancies play a crucial role for activity and selectivity.


ChemSusChem ◽  
2014 ◽  
Vol 7 (5) ◽  
pp. 1468-1475 ◽  
Author(s):  
Jiu-Ju Wang ◽  
Zhi-Jun Li ◽  
Xu-Bing Li ◽  
Xiang-Bing Fan ◽  
Qing-Yuan Meng ◽  
...  


2007 ◽  
pp. 483 ◽  
Author(s):  
Bonamali Pal ◽  
Tsukasa Torimoto ◽  
Ken-ichi Okazaki ◽  
Bunsho Ohtani


2014 ◽  
Vol 68 (9) ◽  
Author(s):  
María Hernández-Torres ◽  
María Ojeda-Carrera ◽  
Manuel Sánchez-Cantú ◽  
Nicolás Silva-González ◽  
Justo Gracia-Jiménez

AbstractCadmium sulfide/titanium dioxide (CdS/TiO2) composite films were grown on glass by the chemical bath deposition (DBQ) and sol-gel/dip coating methods, respectively, in order to increase the photocatalytic activity of TiO2 in photodegradation processes. The influence of the CdS deposition time on the morphology, optical absorption, and phononic modes of the composites were examined. Scanning electron microscopy (SEM) images showed clearly the CdS deposit on the TiO2 surface. The absorbance spectra indicated that the absorption of composites depends on the CdS deposition time and the absorption edges are shifted to the visible range. Micro Raman spectra exhibited the phonons associated with the TiO2 anatase and the longitudinal optic (LO) phonon of CdS whose intensity increases with the CdS deposition time. Photodegradation of methylene blue (MB) under visible light irradiation was observed in all films and the results were compared with those obtained with TiO2 films. The decomposition is higher for the composite with the CdS deposition time of 15 min. This optimal deposition time allows maximal enhancement of the charge carriers transfer to TiO2 involved in the photocatalysis. No signal associated with cadmium was detected by the atomic absorption spectroscopy (AAS), which means that the CdS photocorrosion does not occur since trap centers such as OH-Cd-S and Cl−, which trap holes and inhibit the photocorrosion, are produced during the growth process.



RSC Advances ◽  
2016 ◽  
Vol 6 (78) ◽  
pp. 74234-74240 ◽  
Author(s):  
Xin Xie ◽  
Kui Li ◽  
Wei-De Zhang

A photoanode comprised of vertically aligned Ti-doped hematite nanosheet arrays decorated with cadmium sulfide nanoparticles was fabricated. The Ti-Fe2O3/CdS electrode shows high photoelectrochemical response under visible light irradiation.







Synthesis ◽  
2020 ◽  
Author(s):  
Sabina Smoleń ◽  
Aleksandra Wincenciuk ◽  
Dorota Gryko ◽  
Olga Drapała

AbstractVitamin B12 plays a crucial role in enzymatic transformations. This natural compound proved also useful as a catalyst in numerous organic reactions. Commercial availability and lower cost than precious metal complexes, make cobalamin an attractive candidate for a broader use as a benign Co-catalyst. Herein, the vitamin B12-catalyzed dicarbofuntionalization of bromoalkenes with electrophilic olefins is reported leading to substituted pyrrolidines and piperidines in decent yields after only 15 minutes under light irradiation.



2020 ◽  
Vol 9 (4) ◽  
pp. 83-87
Author(s):  
Thu Do Thi Anh ◽  
Ha Vu Thi Thai ◽  
Ngan Pham Quang ◽  
Thai Giang Hong ◽  
Hieu Nguyen Trung ◽  
...  

Bismuth sulfide (Bi2S3) nanostructures with various morphologies, including nanowires, nanorods and nanoflowers, have been successfully fabricated via a facile hydrothermal method. The results show that the sulfur source plays a crucial role in determining the product morphology. Photocatalysis experiments show Bi2S3 nanowires exhibit the highest photocatalytic reduction of Cr(VI) when exposed to visible light irradiation.





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