This paper reports on the numerical analysis of a volumetric solar receiver-reactor for hydrogen production, using 2-step reduction–oxidation cycle. A detailed parametric sweep covering hundreds various parameter combinations is performed large reactor, transient physical model. We generate performance maps which are currently cost prohibitive via experimental or high–fidelity simulation studie...

We report a nickel complex containing a conjugated bis-dithiocarbazate ligand that is an active catalyst for the reduction of protons into hydrogen gas. Light-driven hydrogen generation is observed from a system containing this molecular nickel catalyst coupled with a fluorescein photosensitizer and triethylamine sacrificial donor. The photocatalytic system is stable for over 70 hours, achievin...

Single crystals of nonlinear optical material bis (guanidinium) hydrogen phosphate monohydrate (G2HP) belonging to non centrosymmetric space group P 21c were successfully grown by the slow evaporation method. Optical transmittance and second harmonic generation of the grown crystals have been studied by UV-vis-NIR spectrum and Kurtz powder technique respectively. The transmittance of G2HP cryst...

By means of first principles calculations we show that both rutile and anatase phases of bulk TiO2 doped by S, Se or Pb can display substantial decreasing in the band gap (up to 50%), while doping by Zr does not sizably affect the band-gap value. Moreover, the absorption edge is shifted (up to 1 eV) to the lower energy range in the case of TiO2 doped by S or Pb that opens a way to enhancin...

In this study treatment of palm oil mill effluent was carried out with the intention to produce hydrogen during the anaerobic degradation process. The hydrogen generating microflora was isolated from the cow dung based on pH adjustment (pH 5) coupled with heat treatment (2 h). The microflora was initially tested for its hydrogen generating capability for varying fermentation pH of 4, 5, 6 and 7...

by means of first principles calculations we show that both rutile and anatase phases of bulk tio2 doped by s, se or pb can display substantial decreasing in the band gap (up to 50%), while doping by zr does not sizably affect the band-gap value. moreover, the absorption edge is shifted (up to 1 ev) to the lower energy range in the case of tio2 doped by s or pb that opens a way to enhancing of ...

This paper reports absorption, LIF and Raman spectra of samples of Polydocanol, Vancomycin hidrochloride and ultrapure water, exposed to laser radiation. Conclusions: -medicines molecules exposed to laser radiation are modified and foams may be produced out of them; -Raman measurements on water beads show an important potential for studies of the behaviour of water in the presence of laser radi...

Selenium generally exhibits preferential habitual 1D growth as a result of redox reactions of selenium compounds. Commercial Se powder melts in silicone oil under refluxing conditions and upon subsequent cooling evolve amorphous Se nanoballs (SNBs). Further ultrapure crystalline 1D Se grows from SNBs due to solvent mediated oriented attachment.