Application of QD-MOF composites for photocatalysis: Energy production and environmental remediation

Recent progress of photocatalytic membrane reactors in water treatment and in synthesis of organic compounds. A review

A review on recent advances in photodegradation of dyes using doped and heterojunction based semiconductor metal sulfide nanostructures for environmental protection

Electrochemical sensor based on palladium-reduced graphene oxide modified with gold nanoparticles for simultaneous determination of acetaminophen and 4-aminophenol

Quantum dot-decorated semiconductor micro- and nanoparticles: A review of their synthesis, characterization and application in photocatalysis.

In-situ synthesis of high stable CdS quantum dots and their application for photocatalytic degradation of dyes.

Photocatalytic degradation of pollutants based on semiconductor quantum dots (QDs) can be applied in wastewater purification methods. However, application of free QDs was associated with some difficulties, such as oxidation and agglomeration of QDs and difficulties in separation. As a solution to these problems, we have proposed the production of mesoporous SBA-15 supported CdS quantum dots as a more stable photo-catalyst. The efficiency of these prepared nanocomposites was examined for photocatalytic degradation of Alizarin, as an organic pollutant. Results demonstrated that the proposed material is a promising catalyst for photocatalytic degradation of dyes in wastewaters. The kinetic and adsorption isotherms of photocatalytic degradation process were also studied and a detailed mechanism proposed for degradation process. The proposed mechanism was studied using free radicals trapping experiments; results demonstrated that the $${}^{ \bullet }{\text{O}}_{2}^{ - }$$
 radicals are active intermediates and have an important role in the photodegradation mechanism.

Preparation of Mesoporous SBA-15 Supported CdS Quantum Dots and Its Application for Photocatalytic Degradation of Organic Pollutants in Aqueous Media

Application of CdS quantum dots modified carbon paste electrode for monitoring the process of acetaminophen preparation.

A simple, sensitive and selective chemiluminescence method is proposed for the determination of Acetylcysteine and Diclofenac in pharmaceutical samples. The method is based on the measuring light intensity of NaHCO3-H2O2 @ CdS chemiluminescence system in the absence and presence of Acetylcysteine and Diclofenac. It was found that the intensity of chemiluminescence is increased by addition of acetylcysteine while the light intensity is decreased with increasing diclofenac concentration. The CdS quantum dots nanoparticles were characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), UV–Vis spectrophotometry and Fluorescence spectroscopy. The optimum conditions for maximizing the CL emission intensity were studied by means of a Box–Behnken experimental design combined with response surface modeling (RSM) and quadratic programming. Under the optimal conditions, results for measurement of diclofenac was found as follows: linear range 1 × 10−5 - 1 × 10−9 Molar with R2 = 0.98, limit of detection 5 × 10−10 Molar and relative standard deviation of 2.4% for diclofenac; and for N-acetylcysteine was : linear range 1 × 10−6 - 1 × 10−9 Molar, the limit of detection 5 × 10−10 Molar, and the relative standard deviation of 3.4%.

Determination of Diclofenac and N-Acetylcysteine by an Optimized Luminescence Method Using CdS Quantum Dots as Sensitizers

Photocatalytic degradation of pollutants using the semiconductor quantum dots (QDs) can be applied to water treatment processes. In this paper, first, the orange peel (OP) and the activated carbon (AC) were prepared from the orange peel wastes. Second, CdS quantum dot loaded adsorbents were prepared from these adsorbents and they were labelled as CdS@OP and CdS@AC, respectively. This new photocatalyst was characterized by means of FT-IR, FESEM and UV-Vis. Then, the adsorption properties of these prepared adsorbents for the removal of alizarin, as an organic pollutant, were studied and AC was selected as a better adsorbent for this purpose. Afterward, the photocatalytic properties of these adsorbents were also studied for the degradation of alizarin, under the sunlight irradiation. A factorial design method was used to achieve the optimal condition and the best photocatalyst was selected. Finally, CdS@AC nanocomposite was selected as a more effective photocatalyst with the degradation efficiency of 82% of dye solution, under 2h sunlight irradiation.

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Mohammad-Rasool Sadeghi-Maleki

Papers

In-situ synthesis of high stable CdS quantum dots and their application for photocatalytic degradation of dyes.

Preparation of Mesoporous SBA-15 Supported CdS Quantum Dots and Its Application for Photocatalytic Degradation of Organic Pollutants in Aqueous Media

Application of CdS quantum dots modified carbon paste electrode for monitoring the process of acetaminophen preparation.

Determination of Diclofenac and N-Acetylcysteine by an Optimized Luminescence Method Using CdS Quantum Dots as Sensitizers

Preparation of adsorbents containing CdS quantum dots from the orange peel for the sewage treatment