Selective adsorption and ultrafast fluorescent detection of Cr(VI) in wastewater using neodymium doped polyaniline supported layered double hydroxide nanocomposite

Wani, Ajaz Ahmad; Khan, Amjad Mumtaz; Manea, Yahiya Kadaf; Salem, Mansour A.S.; Shahadat, Mohammad

doi:10.1016/j.jhazmat.2021.125754

Cited by 73 publications

(20 citation statements)

References 45 publications

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“…However, the natural fluorescence of some LDHs can be used in reverse, wherein the analyte absorbs some irradiation to reduce the fluorescent reaction from the LDHs. Wani et al synthesized a trimetallic ZnAlNd-LDH supported by a PANI template for the fluorometric Cr 6+ detection via a hydrothermal urea hydrolysis method-as illustrated in Figure 9C [146]. The trimetallic ZnAlNd-LDH/PANI nanocomposite exhibited a more porous structure, owing to fewer agglomerations because of Nd 3+ integration.…”

Section: Metal Ionsmentioning

confidence: 99%

Recent Advances in Layered Double Hydroxide-Based Electrochemical and Optical Sensors

Kim

Varga

Adhikari³

et al. 2021

Nanomaterials

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Layered double hydroxides (LDHs) have attracted considerable attention as promising materials for electrochemical and optical sensors owing to their excellent catalytic properties, facile synthesis strategies, highly tunable morphology, and versatile hosting ability. LDH-based electrochemical sensors are affordable alternatives to traditional precious-metal-based sensors, as LDHs can be synthesized from abundant inorganic precursors. LDH-modified probes can directly catalyze or host catalytic compounds that facilitate analyte redox reactions, detected as changes in the probe’s current, voltage, or resistance. The porous and lamellar structure of LDHs allows rapid analyte diffusion and abundant active sites for enhanced sensor sensitivity. LDHs can be composed of conductive materials such as reduced graphene oxide (rGO) or metal nanoparticles for improved catalytic activity and analyte selectivity. As optical sensors, LDHs provide a spacious, stable structure for synergistic guest–host interactions. LDHs can immobilize fluorophores, chemiluminescence reactants, and other spectroscopically active materials to reduce the aggregation and dissolution of the embedded sensor molecules, yielding enhanced optical responses and increased probe reusability. This review discusses standard LDH synthesis methods and overviews the different electrochemical and optical analysis techniques. Furthermore, the designs and modifications of exemplary LDHs and LDH composite materials are analyzed, focusing on the analytical performance of LDH-based sensors for key biomarkers and pollutants, including glucose, dopamine (DA), H2O2, metal ions, nitrogen-based toxins, and other organic compounds.

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Section: Metal Ionsmentioning

confidence: 99%

Recent Advances in Layered Double Hydroxide-Based Electrochemical and Optical Sensors

Kim

Varga

Adhikari³

et al. 2021

Nanomaterials

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“…It means that the CNT after acid treatment has been functionalized and some carboxyl groups are bonding with Nd(III) ions to create carboxylates. 23,40,41 Predicated on the FT-IR results, it is possible to deduce that CNTs were effectively adorned with the MA-1 crystal.…”

Section: Ft-ir Spectral Analysismentioning

confidence: 99%

Carbon Nanotubes Decorated with Coordination Polymers for Fluorescence Detection of Heavy-Metal Ions and Nitroaromatic Chemicals

et al. 2022

Self Cite

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Herein, [Nd(NO 3 ) 3 (H 2 pzdca)] n (MA-1) was synthesized from a reaction of 2,3-pyrazinedicarboxylic acid [H 2 Pzdca] as an organic linker with salt of Nd(III) under solvothermal conditions. The detailed structural analysis for crystals was performed utilizing single-crystal X-ray diffraction (SCXRD). After that, the neodymium-based coordination polymer (MA-1) crystal was directly generated upon the surface of functionalized carbon nanotubes (F-CNTs) through bonds or affinity between F-CNTs and MA-1 via the solvothermal approach. Meanwhile, the existence of F-CNTs does not affect the production of MA-1 crystals. FT-IR, PXRD, SEM, TEM, and SCXRD studies were used to characterize the crystalline material, MA-1 and MA-

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“…Accordingly, such properties of LDHs and various other materials have motivated the researchers to fabricate diverse nanocomposites, which could offer combinatorial effects in terms of structural and functional attributes to significantly improve outcomes compared to those used solely in diverse applications. [ 1b,4b – e,11c,12,25b ] These nanocomposites of LDHs that with diverse molecular assemblies arranged on the LDHs have been applied similar to LDHs in various applications, such as adsorption (metal and dye removal), [ 26a,141 ] biomedicine, [ 1c,41,130c,142 ] catalysis, [ 143 ] agriculture/artificial photosynthesis, [ 4g ] energy storage, [ 6 ] and miscellaneous applications. [ 22b,44a,94,144 ]…”

Section: Applicationsmentioning

confidence: 99%

Trends in Layered Double Hydroxides‐Based Advanced Nanocomposites: Recent Progress and Latest Advancements

Chen

Xia

Mende

et al. 2022

Adv Materials Inter

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Recently, layered double hydroxides (LDHs) have gathered vast interest due to overall positive charge, unique crystallinity, and biocompatibility for diverse applications. Despite the advantageous attributes, these hydrotalcites often result in several limitations concerning the application requirements, such as aggregation, as well as poor chemical and thermal stabilities, hindering their scale‐up progress and practical utilization. In addressing these issues, the recent advancements in the fabrication of intelligent LDHs nanocomposites based on organically (polymer/polyelectrolyte)‐modified and inorganic (metal)‐composited architectures are systematically presented. Initially, a brief note on the shortcomings in various fields and the chemistry of these pristine LDHs is given. Then, various synthetic strategies used to fabricate these emerging LDH nanocomposites are comprehensively emphasized, focusing on the advancements in their structure and applicability. In addition, the effects of various attractive physicochemical attributes of LDHs and their nanocomposite forms are discussed, including their applicability in adsorption, biomedicine, catalysis, energy, and environment‐related applications. In summary, this article is concluded with an outlook concerning the positioning of LDH‐based nanocomposites compared to other innovative materials, as well as the current challenges and future requirements for scale‐up.

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Selective adsorption and ultrafast fluorescent detection of Cr(VI) in wastewater using neodymium doped polyaniline supported layered double hydroxide nanocomposite

Cited by 73 publications

References 45 publications

Recent Advances in Layered Double Hydroxide-Based Electrochemical and Optical Sensors

Recent Advances in Layered Double Hydroxide-Based Electrochemical and Optical Sensors

Carbon Nanotubes Decorated with Coordination Polymers for Fluorescence Detection of Heavy-Metal Ions and Nitroaromatic Chemicals

Trends in Layered Double Hydroxides‐Based Advanced Nanocomposites: Recent Progress and Latest Advancements

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