Fabrication and comparison of the photocatalytic activity of ZnSe microflowers and nanosheets

Abstract

ZnSe mciroflowers and nanosheets were successfully fabricated by annealing the corresponding precursor ZnSe(en) 0.5 hybrid (en = ethylenediamine), which were synthesized via a solvothermal process in ethylenediamine-water system without any surfactants. All the samples were characterized by XRD, SEM and TEM. The results show that the precursor ZnSe(en) 0.5 was converted into pure ZnSe by annealing with original morphology preserved. ZnSe microflowers were assembled from lots of rectangle nanosheets. Nanosheets and the nanosheets of microflowers have the same growth pattern. The photoluminescence and photocatalytic activity of ZnSe microflowers and nanosheets were investigated. The result shows that ZnSe microflowers exhibited superior photocatalytic activity and the reason was analyzed.

Preparation and Comparison of the Photocatalytic Properties of ZnSe with Different Crystalline Phases

“…HWZ ZnSe NSs and CZB ZnSe NDs have a sharp emission peak centered at ≈472 and 485 nm, respectively. This emission peak is usually called the near band edge emission (NBE) due to the exciton recombination . Compared with HWZ ZnSe NSs, the NBE peak of CZB ZnSe NDs shows an obvious red‐shift phenomenon.…”

“…To date, many HWZ ZnSe with different morphological structures have been synthesized, such as quantum dots, nanoparticles, nanotube arrays, nanowires, nanobelts, microdisks, micro‐/nanoflowers, and nanosheets . However, the preparation and application in the photocatalysis field of CZB ZnSe micro‐/nanomaterials have been rarely studied to date .…”

Thermal profile analysis in simulation of the initial stage of synthesis of Cu-Au nanoparticles from the gas phase

“…The nanometer-sized compounds Cu-Au studied by us in this work are now being studied quite actively [11][12][13][14][15][16][17][18][19][20][21] because of their potential applications in the field of catalysis and optics.…”

Photoinduced Oxidation Catalysis by Au25‐xAgx(SR)18 Nanoclusters

“… Due to the luminescence and synergy effect, they are valuable for biolabeling and catalysis . However, the catalytic reaction types are limited to styrene oxidation,, reduction, C−C coupling, hydrolysis,, photocatalysis which usually occurs under more ambient condition attracts less attention. Au 25 − NCs are privileged for their variable valence state (−1, 0, +1), which endow them with a unique electron‐transfer capability to catalyze organic reactions .…”