Photocatalysis. Irradiation conditions for testing photocatalytic properties of semiconducting materials and the measurement of these conditions

A knowledge of the behaviour of dislocations in semiconducting materials is essential to the understanding of devices which use them . This work is concerned with dislocations in alloys related to the semiconductor GaAs . Previous work on GaAs has shown that microtwinning occurs on one of the <110> rosette arms after indentation in preference to the other . We have shown that the effect of replacing some of the Ga atoms by Al results in microtwinning in both of the rosette arms.In the work to be reported dislocations in specimens of different compositions of Gax Al(1-x) As and Gax In(1-x) As have been studied by using micro indentation on a (001) face at room temperature . A range of electron microscope techniques have been used to investigate the type of dislocations and stacking faults/microtwins in the rosette arms , which are parallel to the [110] and [10] , as a function of composition for both alloys . Under certain conditions microtwinning occurs in both directions . This will be discussed in terms of the dislocation mobility.

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Tuning the pore structures and photocatalytic properties of a 2D covalent organic framework with multi-branched photoactive moieties

Nanoscale ◽

10.1039/d0nr02994g ◽

2020 ◽

Vol 12 (30) ◽

pp. 16136-16142

Author(s):

Xuan Wang ◽

Ming-Jie Dong ◽

Chuan-De Wu

Keyword(s):

Photocatalytic Properties ◽

Effective Strategy ◽

Covalent Organic Framework ◽

Highly Efficient ◽

Pore Structures ◽

Local Connection ◽

Organic Framework

An effective strategy to incorporate accessible metalloporphyrin photoactive sites into 2D COFs by establishing a 3D local connection for highly efficient photocatalysis was developed.

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Visible-light-driven Photocatalytic Properties of Electrospun Bismuth Tungstate/PAN Composite Nanofiber Membrane

JOURNAL OF POLYMER MATERIALS ◽

10.32381/jpm.2018.35.03.4 ◽

2019 ◽

Vol 35 (3) ◽

pp. 295-304

Author(s):

XINHUA LIU ◽

◽

HONGZHANG LI ◽

ZHI LIU ◽

YINCHUN FANG ◽

...

Keyword(s):

Visible Light ◽

Photocatalytic Properties ◽

Nanofiber Membrane ◽

Bismuth Tungstate ◽

Composite Nanofiber ◽

Visible Light Driven

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New Insights into the Nature of the Band Gap of CuGeO3 Nanoparticles: Synthesis, Electronic Structure, and Optical and Photocatalytic Properties

10.26434/chemrxiv.8362409.v1 ◽

2019 ◽

Author(s):

Victor Y. Suzuki ◽

Luís Henrique Cardozo Amorin ◽

Natália H. de Paula ◽

Anderson R. Albuquerque ◽

Julio Ricardo Sambrano ◽

...

Keyword(s):

Electronic Structure ◽

Band Gap ◽

Material Design ◽

Photocatalytic Properties ◽

Critical Parameters ◽

Synthetic Approach ◽

Microwave Assisted ◽

Theoretical Approaches ◽

Nanoparticles Synthesis ◽

First Time

We report, for the first time, new insights into the nature of the band gap of <a>CuGeO3 </a>(CGO) nanocrystals synthesized from a microwave-assisted hydrothermal method in the presence of citrate. To the best of our knowledge, this synthetic approach has the shortest reaction time and it works at the lowest temperatures reported in the literature for the preparation of these materials. The influence of the surfactant on the structural, electronic, optical, and photocatalytic properties of CGO nanocrystals is discussed by a combination of experimental and theoretical approaches, and that results elucidates the nature of the band gap of synthetized CGO nanocrystals. We believe that this particular strategy is one of the most critical parameters for the development of innovative applications and that result could shed some light on the emerging material design with entirely new properties.

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