Cadmium selenide quantum dot-zinc oxide composite: Synthesis, characterization, dye removal ability with UV irradiation, and antibacterial activity as a safe and high-performance photocatalyst

Mahmoodi, Niyaz Mohammad; Karimi, Behzad; Mazarji, Mahmoud; Moghtaderi, Hassan

doi:10.1016/j.jphotobiol.2018.08.023

Cited by 92 publications

(26 citation statements)

References 49 publications

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“…5), where the degradation rate of the dyes was decreased by more than 35 %. This is consequence of the scavenger action of ethanol on hydroxyl radicals, which leaves less radicals to attack dye molecules (Mahmoodi et al, 2018). observed (fig.…”

Section: Pl/h 2 O 2 Processmentioning

confidence: 92%

Pulsed light for a cleaner dyeing industry: Azo dye degradation by an advanced oxidation process driven by pulsed light

Martínez-López

Lucas-Abellán

Serrano-Martínez

et al. 2019

Journal of Cleaner Production

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Water pollution by wastewater containing dyes is an environmental issue that can be mitigated by the use of advanced oxidation processes (AOP). Pulsed light (PL) is an emerging food processing technology that uses eco-friendly lamps and can potentially be adapted as light source of an UV-based AOP. In the present work, a PL/H2O2 process was tested for the decolourization of two azo dyes, and a pulsed light/H2O2/ferrioxalate process was tested for the decolourization of one azo dye. The efficiency of the PL/H2O2 process in a batch reactor under different parametric values: dye concentration, pH, H2O2 and salt doses was followed by spectrophotometry and fitted to first-order kinetics; and several degradation products were detected. In the PL/H2O2 process, decolourization rates increased at low dye concentrations and high H2O2 doses, were pH-dependent and were inhibited by the addition of NaCl, Na2SO3 or Na2CO3. More than 50 % decolouration was achieved with the PL/H2O2 process for both dyes after applying 54 J/cm2 (25 light pulses). The PL/H2O2/ferrioxalate process achieved > 95 % decolouration for Methyl orange when applying 21 J/cm2 (10 pulses); that level of energy can be supplied by PL commercial systems in nine and four seconds respectively. No known toxic degradation products were detected. Results show that a PL/H2O2 process has potential to be used for the efficient degradation of dyes from wastewater. Furthermore, the efficacy of this process can be improved by the use of ferrioxalate. PL technology could become an alternative light source to contribute to decrease the environmental impact of wastewater produced by the dyeing industry.We are very thankful for all the suggestions. We have never had so many suggestions for improving a manuscript, and it has taken much time to fulfill all the requests, including new determinations. However, we consider that the requests have been very useful for improving our manuscript.Besides attending all remarks, we inform that we have introduced two additional changes.The first one is that we have deleted all information related to Direct red 83:1 dye. This decision was taken because we were unable to detect intermediaries of the degradation of this dye in spite of we sub-contracted a top analytical laboratory. Therefore, we believe that we should not report the full data from three dyes (Congo red, Direct red 83:1 and Methyl orange) but reporting intermediaries for only two. This decision also took into consideration that the validity of the study and its conclusions also remain valid in spite of excluding the third day from our manuscript. Furthermore, if data on Direct red 83:1 would have left, it would have made the manuscript excessively long, since new data and discussion was added after reviewer's comments.The second change is that we have included a new co-author. She is the leader of the laboratory that was sub-contracted for the study of degradation products. We believe that her effort and input has gone beyond what we have paid, and that she has made a signifi...

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Section: Pl/h 2 O 2 Processmentioning

confidence: 92%

Pulsed light for a cleaner dyeing industry: Azo dye degradation by an advanced oxidation process driven by pulsed light

Martínez-López

Lucas-Abellán

Serrano-Martínez

et al. 2019

Journal of Cleaner Production

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“…Thus, it is widely used in photoelectric detection, solar cells, biosensors, and photocatalysis [ 13 ]. Mahmoodi et al [ 14 ] synthesized CdSe quantum dot–zinc oxide nanocomposites, which degraded approximately 90% BR18 dye upon UV lamp irradiation for 120 min. Li et al [ 15 ] developed ZnO/CdSe–diethylenetriamine (DETA) nanocomposites using a two-step hydrothermal method.…”

Section: Introductionmentioning

confidence: 99%

Assembly and Photocatalytic Degradation Activity of Spherical ZnO/CdSe Heterostructures on Flexible Carbon Cloth Substrates

Chen

2022

Nanomaterials

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With the increasing water pollution, traditional treatments cannot sufficiently remove pollutants, thereby prompting the development of photocatalysts. In this study, ZnO–carbon cloth (CC) and spherical ZnO/CdSe–CC heterostructures with different CdSe loadings were synthesized using an ultrasonic-hydrothermal method on flexible CC. Z20CdSe–CC (ZnO with 20 mg CdSe loaded on CC) exhibited the best visible-light-responsive photocatalytic performance, with approximately 83.5% methylene blue reduced in 180 min. In addition, the degradation efficiency of Z20CdSe–CC was maintained at 70.9% after three cycles in relation to that of the ZnO powder. The synergistic effect of CdSe and CC not only effectively widened the light absorption range of ZnO/CdSe–CC but also further promoted the effective transfer of carriers and realized an efficient photocatalytic degradation process. Therefore, the ZnO/CdSe–CC photocatalytic material with CC as the flexible substrate exhibited high photocatalytic activity and stability in environmental remediation. This provides a design idea for the development of an efficient and flexible photocatalytic material in line with the concept of green chemistry.

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“…CdSe is an II−VI semiconducting material that has been investigated extensively as a result of its small band gap energy (1.65 to 1.8 eV) [14][15][16]. It is appropriate for different optoelectronic uses in catalysis, biological labeling, solar cells, etc.…”

Section: Introductionmentioning

confidence: 99%

Sonochemical Synthesis, Characterization and Optical Properties of Tb-Doped CdSe Nanoparticles: Synergistic Effect between Photocatalysis and Sonocatalysis

Hanifehpour¹,

Ashan²,

Amani‐Ghadim

et al. 2021

Nanomaterials

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In this study, Tb-doped CdSe nanoparticles with variable Tb3+ content were synthesized by a simple sonochemical technique. The synthesized nanoparticles were characterized by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and powder X-ray diffraction (XRD). The sono-photocatalytic activities of the as-prepared specimens were assessed for the degradation of Reactive Black 5. The experimental results show that the sono-photocatalytic process (85.25%) produced a higher degradation percentage than the individual sono- (22%) and photocatalytic degradation (8%) processes for an initial dye concentration and Tb-doped CdSe dosage of 20 mg/L and 1 g/L, respectively. Response surface methodology (RSM) was utilized to assess model and optimize the impacts of the operational parameters, namely, the Tb3+ content, initial dye concentration, catalyst dosage, and time. The addition of benzoquinone results in remarkably inhibited degradation and the addition of ammonium oxalate reduced the removal percentage to 24%. Superoxide radicals and photogenerated holes were detected as the main oxidative species.

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Cadmium selenide quantum dot-zinc oxide composite: Synthesis, characterization, dye removal ability with UV irradiation, and antibacterial activity as a safe and high-performance photocatalyst

Cited by 92 publications

References 49 publications

Pulsed light for a cleaner dyeing industry: Azo dye degradation by an advanced oxidation process driven by pulsed light

Pulsed light for a cleaner dyeing industry: Azo dye degradation by an advanced oxidation process driven by pulsed light

Assembly and Photocatalytic Degradation Activity of Spherical ZnO/CdSe Heterostructures on Flexible Carbon Cloth Substrates

Sonochemical Synthesis, Characterization and Optical Properties of Tb-Doped CdSe Nanoparticles: Synergistic Effect between Photocatalysis and Sonocatalysis

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