Effect of the morphology of CuS upon the photocatalytic degradation of organic dyes

Abstract

ARTICLE This journal isA variety of well defined, highly symmetric, super complex and hierarchical architectures of covellite copper sulfide have been successfully prepared by a simple solvothermal approach. The effect of various influencing parameters on the formation of CuS hierarchical architectures has been precisely investigated and a possible formation mechanism has been elucidated. The exposure time has been found to be a critical factor in controlling the CuS architecture and highly complex structures were obtained under elongated reaction times. The "as synthesized" architectures exhibited excellent photocatalytic activity in visible region for catalysis of individual dye (methylene blue and rhodamine B) and their mixed solutions in presence of H 2 O 2 . The efficient photocatalytic activity can be attributed to carefully controlled hierarchical CuS structures. Overall, this study is of great importance in "bottom-up" assembly of copper sulfide nanoplates to obtain highly complex structures which offer a good opportunity to understand the fundamental significance of atypical structures for their potential applications.

Novel, promising, and broadband microwave‐absorbing nanocomposite based on the graphite‐like carbon nitride/CuS

“…As it can be predictable, energy gap of prepared g‐C 3 N 4 was 2.92 eV, corresponding to recent reports . The CuS nanoplates showed narrower band gap in comparison with its other morphology (1.70–1.96 eV), tailored by Tanveer et al . The results exhibit a red shift to the narrower energy gap for the g‐C 3 N 4 /CuS nanocomposite, facilitating the electron hopping, fluctuation of electrons–hole pairs, and Maxwell–Wagner effect in low frequency, reinforcing microwave absorption properties .…”

“…Moreover, the various morphologies of CuS were constructed by Tanveer et al . using ethylene glycol and sulfur powder as solvent and sulfur source, respectively . Additionally, the CuS nanostructures exhibited proper microwave characteristics …”

Atypical BiOCl/Bi2S3 hetero-structures exhibiting remarkable photo-catalyst response

“…In recent years, many attentions have been paid toward the general approach for preparing unusual and complex structures for versatile applications through the sacrificial templates including hard and soft templates [16][17][18]. However, the atypical architectures fabricated from hard template and through two-step synthetic strategies mostly suffering from their high cost and tedious synthetic procedures [19][20][21][22][23][24][25].…”

Biomimetic strategies to produce catalytically reactive CuS nanodisks

“…In this work, two separate morphologies of CuS were examined: hollow microspheres 53 and walled cuboctahedra. 54 For the microsphere CuS materials, a maximal k obs of 2.4 Â 10 À2 min À1 for methylene blue was observed; however, for the walled cuboctahedra, the supercomplex cuboctahedra of CuS demonstrated the greatest reactivity with a rate constant of 4.0 Â 10 À2 min À1 . Such values are similar in magnitude to the present materials for methylene blue degradation, but again differences in substrate ratios and the light source were present, making a direct comparison difficult.…”