CdTe QD-decorated GO nanosheet heterojunction for efficient photocurrent generation and photocatalytic activity

Cadmium telluride quantum dot (CdTe QD)-decorated graphene oxide (GO) nanosheets are promising heterojunctions for the environmental remediation of organic pollutants in water. However, assembling these two materials is a challenge. For this purpose, we have developed a one-step approach for the decoration of QDs onto the surface of GO nanosheets/intercalation of QDs into GO nanosheets through self-assembly, resulting in the formation of sandwiched hybrid heterojunctions. After synthesis, the samples were analysed for variations in their structural, morphological, compositional, optical and photoelectrochemical characteristics using various analytical tools. Interlinking QDs and GO nanosheets enhanced the photocurrent generation (& SIM;5.8 & mu;A cm-2), resulting in faster electron transfer by delaying the decay time (58.25 ms). A higher rate constant value (k = 0.135 min-1) was obtained for degrading 93% MB dye in 20 min. This work demonstrates a cost-effective strategy for constructing CdTe QDs/GO nanosheet hybrid heterojunctions for potential application in the field of photocatalysis. Cadmium telluride quantum dot (CdTe QD)-decorated graphene oxide (GO) nanosheet is a promising heterojunction for the environmental remediation of organic pollutants in water.

Automated summary

A one-step approach is developed for the decoration of CdTe QDs onto the surface of GO nanosheets/integration of QDs into GO nanosheets through self-assembly, forming sandwiched hybrid heterojunctions. Interlinking QDs and GO nanosheets improves photocurrent generation (~5.8 μA cm-2) and enhances electron transfer by prolonging decay time (58.25 ms). The obtained higher rate constant value (k = 0.135 min-1) enables the degradation of 93% MB dye in 20 min. This work demonstrates a cost-effective strategy for constructing CdTe QDs/GO nanosheet hybrid heterojunctions with potential application in photocatalysis.