ZIF-8 templated assembly of La3+-anchored ZnO distorted nano-hexagons as an efficient active photocatalyst for the detoxification of rhodamine B in water

Karuppasamy, K.; Rabani, Iqra; Vikraman, Dhanasekaran; Bathula, Chinna; Theerthagiri, Jayaraman; Bose, Ranjith; Yim, Chang-Joo; Kathalingam, A.; Seo, Young‐Soo

doi:10.1016/j.envpol.2020.116018

Cited by 33 publications

(7 citation statements)

References 46 publications

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“…There are no proofs for zero and Zn 3+ valence states of Zn. 30,38,39 Therefore, the Zn 2p 3/2 and Zn 2p 1/2 at 1020.7 and 1043.8 eV reveal the stabilization of Zn−O moieties in the ZnO@GC frameworks. The deconvoluted XPS scan of C 1s of ZnO@GC (especially ZnO@GC-550) shows three strong signals (Figure 3b, e, h), at the binding energies of around 288.5, 285.3, and 284.6 eV for different carbon environments that include C�O, C−O−C, and C−C respectively in the resultant sample.…”

Section: Resultsmentioning

confidence: 93%

“…Additionally, the electronic states with multiple valance levels of Zn-atoms could be evaluated with the ultrahigh magnification scan, in which Zn-2p levels are stated and personalized with two-spin orbital coupling (Zn 2p 3/2 and Zn 2p 1/2 ) peaks, as shown in Figure a, d, g. For instance, in the case of ZnO@GC-550, the two peaks located at around the binding energies of 1020.7 and 1043.8 eV are correlated to Zn 2p 3/2 and Zn 2p 1/2 , respectively, which in turn signifies the existence of Zn in the Zn 2+ state. There are no proofs for zero and Zn 3+ valence states of Zn. ,, Therefore, the Zn 2p 3/2 and Zn 2p 1/2 at 1020.7 and 1043.8 eV reveal the stabilization of Zn–O moieties in the ZnO@GC frameworks. The deconvoluted XPS scan of C 1s of ZnO@GC (especially ZnO@GC-550) shows three strong signals (Figure b, e, h), at the binding energies of around 288.5, 285.3, and 284.6 eV for different carbon environments that include CO, C–O–C, and C–C respectively in the resultant sample …”

Section: Resultsmentioning

confidence: 97%

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Metal Organic Framework-Derived ZnO@GC Nanoarchitecture as an Effective Hydrogen Gas Sensor with Improved Selectivity and Gas Response

Sharma

Karuppasamy

Vikraman

et al. 2022

ACS Appl. Mater. Interfaces

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Although they are not as favorable as other influential gas sensors, metal-oxide semiconductor-based chemiresistors ensure minimal surface reactivity, restricting their gas selectivity, gas response, and reaction kinetics, particularly when functioning at room temperature (RT). A hybrid design, which includes metal-oxide/carbon nanostructures and passivation with specific gas filtration layers, can address the concerns of surface reactivity. We present a novel hierarchical nanostructured zinc oxide (ZnO), decorated with graphitic carbon (GC) and synthesized via a wet-chemical strategy, which is then followed by the self-assembly of a zeolitic imidazolate framework (ZIF-8). Because of its large surface area, high porosity, and efficient inspection of other analyte (interfering) gases, the ZnO@GC can provide intensified surface reactivity at RT. In the present study, such a hybrid sensor confirmed extraordinary gas sensing properties, which was characterized by excellent H2 selectivity, fast response, rapid recovery kinetics, and high gas response (ΔR/R 0 ∼ 124.6%@10 ppm), particularly in extremely humid environments. The results reveal that adsorption sites provided by the ZIF-8 template-based ZnO@GC frameworks facilitate the adsorption and desorption of H2.

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Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 97%

Metal Organic Framework-Derived ZnO@GC Nanoarchitecture as an Effective Hydrogen Gas Sensor with Improved Selectivity and Gas Response

Sharma

Karuppasamy

Vikraman

et al. 2022

ACS Appl. Mater. Interfaces

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“…Hydroquinone was included in the list of three types of carcinogens. e acceptable emission in the Chinese national standard is less than 0.5 mg•mL −1 [22].…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Copper-Coated-Reduced-Graphene-Oxide and Its Application as a Highly Sensitive Electrochemical Sensor for Hydroquinone

Yao

2022

Journal of Chemistry

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A facile step-by-step approach for synthesizing copper nanoparticles (CuNPs) loaded on the wrinkled surface of reduced-graphene-oxide (Cu/rGO) was conducted using a reductant at room temperature. Multiple characterization methods were applied to specify the morphology and composition of the nanocomposites. The scanning electron microscope and transmission electron microscope of Cu/rGO show that spherical CuNps were dispersed uniformly on the surface of rGO. In addition, the characteristic peaks of Cu and carbon in energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy analyses spectra proved that Cu/rGO nanocomposites were synthesized. Soon afterwards, a new hydroquinone electrochemical sensor was prepared with Cu/rGO and a glassy carbon electrode. The sensor was characterized by cyclic voltammetry and electrochemical impedance spectroscopy. Hydroquinone was detected by differential pulse voltammetry using the composite electrode. Under the optimal condition, the linear response range was from 0.05 μM to 90 μM; the detection limit is 0.02 μM (S/N = 3) for hydroquinone. The electrochemical sensor exhibited high sensitivity in practical environmental water sample detection.

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“…In most cases, under inert gas/hydrogen (Ar/H 2 ) atmosphere, inorganic metal cations such as Cu, Zn, Co, and Ni based oxides deposited over organic carbonaceous materials can be physically or chemically reduced to create metal/carbon or metal alloy/carbon hybrid nanostructures. [31][32][33] The aggregation and uneven dispersion of nanoparticles are unavoidable and limit the physicochemical and electrochemical properties of the systems. In this context, a new category of porous, metal organic framework (MOF)-derived organic-inorganic hybrid nanostructures has attracted much attention in the fields of energy conversion and storage owing to their good thermal/ chemical stability, tunable porosity, and exceptionally large surface areas.…”

Section: Introductionmentioning

confidence: 99%

Unveiling the Redox Electrochemistry of MOF‐Derived fcc‐NiCo@GC Polyhedron as an Advanced Electrode Material for Boosting Specific Energy of the Supercapattery

Karuppasamy

Vikraman

Hussain

et al. 2022

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Metal organic frameworks (MOFs), which constitute a new class of porous organic–inorganic hybrid materials, have gained considerable attention in the fields of electrochemical energy storage and conversion devices owing to their open topological structures, large surface areas, tunable morphologies, and extreme redox activity. A synthesis protocol that comprises coprecipitation followed by controlled calcination processes to design a battery‐type electrode is used. This electrode consists of three‐dimensional (3D), ant cave‐like polyhedrons of nickel–cobalt alloy on graphitic carbon (GC; NiCo@GC) nanostructures; trimesic acid is used as a potential MOF‐linker. The developed NiCo@GC sample exhibits mesoporous characteristics with the maximum surface area of 94.08 m2 g−1 at 77 K. In addition, the redox activity at different sweep rates reveals the battery‐type charge storage behavior of the NiCo@GC electrode; its three‐electrode assembly provides 444 C g−1 specific capacity at 2 A g−1 with long‐term capacity retention. The constructed supercapattery (SC) devices (i.e., AC//NiCo@GC) achieved capacity, specific energy, and specific power are 74.3 mAh g−1, 39.5 Wh kg−1, and 665 W kg−1, respectively. Owing to its reasonable electrochemical characteristics, the prepared NiCo@GC material is a promising candidate for supercapattery electrodes for portable electronic devices.

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ZIF-8 templated assembly of La3+-anchored ZnO distorted nano-hexagons as an efficient active photocatalyst for the detoxification of rhodamine B in water

Cited by 33 publications

References 46 publications

Metal Organic Framework-Derived ZnO@GC Nanoarchitecture as an Effective Hydrogen Gas Sensor with Improved Selectivity and Gas Response

Metal Organic Framework-Derived ZnO@GC Nanoarchitecture as an Effective Hydrogen Gas Sensor with Improved Selectivity and Gas Response

Facile Synthesis of Copper-Coated-Reduced-Graphene-Oxide and Its Application as a Highly Sensitive Electrochemical Sensor for Hydroquinone

Unveiling the Redox Electrochemistry of MOF‐Derived fcc‐NiCo@GC Polyhedron as an Advanced Electrode Material for Boosting Specific Energy of the Supercapattery

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