Sunlight promoted removal of toxic hexavalent chromium by cellulose derived photoactive carbon dots

Aggarwal, Ruchi; Saini, Deepika; Sonkar, Sumit Kumar; Sonker, Amit Kumar; Westman, Gunnar

doi:10.1016/j.chemosphere.2021.132287

Cited by 37 publications

(33 citation statements)

References 71 publications

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“…The fabrication of CDs from microcrystalline cellulose (MCC) is described in a scalable synthetic approach [ 138 ]. Elimination of hazardous Cr 6+ from wastewater was used to test the effectiveness of the produced CDs.…”

Section: Applications Of Cdsmentioning

confidence: 99%

Recent Advances in Synthesis, Modification, Characterization, and Applications of Carbon Dots

Pundi

Chang

2022

Polymers

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Although there is significant progress in the research of carbon dots (CDs), some challenges such as difficulty in large-scale synthesis, complicated purification, low quantum yield, ambiguity in structure-property correlation, electronic structures, and photophysics are still major obstacles that hinder the commercial use of CDs. Recent advances in synthesis, modification, characterization, and applications of CDs are summarized in this review. We illustrate some examples to correlate process parameters, structures, compositions, properties, and performances of CDs-based materials. The advances in the synthesis approach, purification methods, and modification/doping methods for the synthesis of CDs are also presented. Moreover, some examples of the kilogram-scale fabrication of CDs are given. The properties and performance of CDs can be tuned by some synthesis parameters, such as the incubation time and precursor ratio, the laser pulse width, and the average molar mass of the polymeric precursor. Surface passivation also has a significant influence on the particle sizes of CDs. Moreover, some factors affect the properties and performance of CDs, such as the polarity-sensitive fluorescence effect and concentration-dependent multicolor luminescence, together with the size and surface states of CDs. The synchrotron near-edge X-ray absorption fine structure (NEXAFS) test has been proved to be a useful tool to explore the correlation among structural features, photophysics, and emission performance of CDs. Recent advances of CDs in bioimaging, sensing, therapy, energy, fertilizer, separation, security authentication, food packing, flame retardant, and co-catalyst for environmental remediation applications were reviewed in this article. Furthermore, the roles of CDs, doped CDs, and their composites in these applications were also demonstrated.

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Section: Applications Of Cdsmentioning

confidence: 99%

Recent Advances in Synthesis, Modification, Characterization, and Applications of Carbon Dots

Pundi

Chang

2022

Polymers

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“…In the current time, great advances have been achieved in the removal of nitroaromatics from wastewater by many treatment processes including photocatalytic degradation, catalytic reduction, electrocatalytic oxidation, hydrogenation reactions, membrane process, ultrasonic degradation, photoelectrocatalytic degradation, Fenton oxidation methods, microwave assisted oxidation, and adsorption. , Through control over size, shape, composition, surface properties, and physicochemical characteristics, nanomaterials offer exceptional properties for water remediation including the removal of nitroaromatics in a cost-effective manner. ,, In general, zeolites, semiconductor metal oxides, nanocarbons, and composite materials are employed as adsorbents or photocatalysts for the removal of nitroaromatics from wastewater . Being of nano/micro size, they are difficult to separate from wastewater after use and also require long times to remove nitroaromatics completely.…”

Section: Introductionmentioning

confidence: 99%

“…4,5 Through control over size, shape, composition, surface properties, and physicochemical characteristics, nanomaterials offer exceptional properties for water remediation including the removal of nitroaromatics in a cost- effective manner. 1,11,12 In general, zeolites, semiconductor metal oxides, nanocarbons, and composite materials are employed as adsorbents or photocatalysts for the removal of nitroaromatics from wastewater. 13 Being of nano/micro size, they are difficult to separate from wastewater after use and also require long times to remove nitroaromatics completely.…”

Section: Introductionmentioning

confidence: 99%

Research Progress and Prospects of Spinel Ferrite Nanostructures for the Removal of Nitroaromatics from Wastewater

Bhaduri

Dikshit

Kim

et al. 2022

ACS Appl. Nano Mater.

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Spinel ferrite nanostructures have played significant roles in the development of materials science and technology. Spinel ferrite nanostructures possess not only promising magnetic properties but also high resistivity, stability, and low eddy current losses. The recent progress in the utilization of spinel ferrite nanostructures for water remediation is reviewed with special emphasis on the adsorption, transformation, degradation, and catalytic reduction of nitroaromatics. Then, the structure–property relationships and design considerations of spinel ferrite nanostructures for catalytic applications are discussed in detail. Insights into the details of the various removal processes on the model spinel ferrite nanostructures are provided with a basic concept of nitroaromatics remediation. Subsequently, reaction kinetics and mechanisms are classified and their advantages and disadvantages are described. Lastly, challenges and future perspectives of spinel ferrite nanostructures for their practical applications are presented. With further advancement, spinel ferrites have potential to be practically utilized for a wide range of applications such as water treatment plants.

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“…Further, high-intensity illumination may induce photocorrosion to the biohybrids assembling with metal-based semiconductor NPs and trigger leaching of toxic metals (Ding et al, 2019;Huang et al, 2019). Among a variety of nano-sized photosensitizers used for photocatalysis, the favorable properties of high water solubility, photostability and tunability of semiconducting carbon dots (CDs) are desirable when working with engineered advanced living biohybrids (Saini et al, 2020;Aggarwal et al, 2022). Further, positive surface charge and reducibility of amine-functionalized carbon dots (NCDs) provide added benefits to immobilize NCDs to surfaces of negatively charged bacteria and generate more reducing powers to aid Cr(VI) reduction (Guo et al, 2019;Thirumalaivasan and Wu, 2020).…”

Section: Introductionmentioning

confidence: 99%

Inward-to-outward assembly of amine-functionalized carbon dots and polydopamine to Shewanella oneidensis MR-1 for high-efficiency, microbial-photoreduction of Cr(VI)

Wang

Zhang

et al. 2022

Chemosphere

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Sunlight promoted removal of toxic hexavalent chromium by cellulose derived photoactive carbon dots

Cited by 37 publications

References 71 publications

Recent Advances in Synthesis, Modification, Characterization, and Applications of Carbon Dots

Recent Advances in Synthesis, Modification, Characterization, and Applications of Carbon Dots

Research Progress and Prospects of Spinel Ferrite Nanostructures for the Removal of Nitroaromatics from Wastewater

Inward-to-outward assembly of amine-functionalized carbon dots and polydopamine to Shewanella oneidensis MR-1 for high-efficiency, microbial-photoreduction of Cr(VI)

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