scholarly journals Surface defect engineering of mesoporous Cu/ZnS nanocrystal-linked networks for improved visible-light photocatalytic hydrogen production

2020 ◽  
Vol 7 (23) ◽  
pp. 4687-4700
Author(s):  
Ioannis Daskalakis ◽  
Ioannis Vamvasakis ◽  
Ioannis T. Papadas ◽  
Sotirios Tsatsos ◽  
Stelios A. Choulis ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Surface Defect ◽  
Energy Levels ◽  
Electronic Energy ◽  
Defect Engineering ◽  
Visible Light Absorption ◽  
Defective Surface ◽  
Electronic Energy Levels ◽  
Visible Light Photocatalytic

Cu-doped ZnS nanocrystal-linked mesoporous frameworks possessing suitable electronic energy levels, strong visible-light absorption and large porosity with a low defective surface show efficient photocatalytic H2 evolution activity from water splitting.

scholarly journals The ultra-violet spectrum of magnesium hydride. 1.—The band at λ 2430

1929 ◽  
Vol 122 (790) ◽  
pp. 442-455 ◽  
Keyword(s):  
Fine Structure ◽  
General Structure ◽  
Energy Levels ◽  
Visible Region ◽  
Ultra Violet ◽  
Present Theory ◽  
Magnesium Hydride ◽  
Electronic Energy ◽  
Band Spectra ◽  
Electronic Energy Levels

The system of bands in the visible region of the emission spectrum of magnesium hydride is now well known. The bands with heads at λλ 5622, 5211, 4845 were first measured by Prof. A. Fowler, who arranged many of the strongest lines in empirical series for identification with absorption lines in the spectra of sun-spots. Later, Heurlinger rearranged these series in the now familiar form of P, Q and R branches, and considered them, with the OH group, as typical of doublet systems in his classification of the fine structure of bands. More recently, W. W. Watson and P. Rudnick have remeasured these bands, using the second order of a 21-foot concave grating, and have carried out a further investigation of the fine structure in the light of the present theory of band spectra. Their detection of an isotope effect of the right order of magnitude, considered with the general structure of the system, and the experimental work on the production of the spectrum, seems conclusive in assigning these bands to the diatomic molecule MgH. The ultra-violet spectrum of magnesium hydride is not so well known. The band at λ 2430 and the series of double lines in the region λ 2940 to λ 3100, which were recorded by Prof. Fowler in 1909 as accompanying the group of bands in the visible region, appear to have undergone no further investigation. In view of the important part played by hydride band spectra in the correlation of molecular and atomic electronic energy levels, it was thought that a study of these features might prove of interest in yielding further information on the energy states of the MgH molecule. The present paper deals with observations on the band at λ 2430; details of an investigation of the other features of the ultra-violet spectrum will be given in a later communication.

Controllable synthesis of inorganic–organic Zn1−xCdxS-DETA solid solution nanoflowers and their enhanced visible-light photocatalytic hydrogen-production performance

2017 ◽  
Vol 46 (34) ◽  
pp. 11335-11343 ◽  
Author(s):  
Jiali Lv ◽  
Jinfeng Zhang ◽  
Kai Dai ◽  
Changhao Liang ◽  
Guangping Zhu ◽  
...  
Keyword(s):  
Solid Solution ◽  
Hydrogen Production ◽  
Visible Light ◽  
Environmental Pollution ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Production Performance ◽  
Controllable Synthesis ◽  
Visible Light Photocatalytic ◽  
Energy Shortage

Sustainable photocatalytic hydrogen evolution (PHE) of water splitting has been utilized to solve the serious environmental pollution and energy shortage problems over the last decade.

Sign in / Sign up

Export Citation Format

Share Document