Reactive adsorption of NO2 over the NaCoO2–Co3O4 nanocomposite: experimental study and first-principles calculations

Gupta, Nishesh Kumar; Rajput, Kaptan; Mehta, Bijal R.; Viltres, Herlys; Roy, Debesh R.; Kim, Kwang Soo

doi:10.1039/d3nj03781a

Cited by 5 publications

(2 citation statements)

References 55 publications

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“…The shift in the binding energy for the K 2p peak after NO 2 adsorption (291.8 → 292.2 eV) was due to the interaction of K + ions with the nitrite/nitrate ions (Figure S13a). 44 For the same reason, a minor shift in the binding energy of Zn 2p 3/2 was observed (Figure S13b). The Mn 2p spectrum of Ene_R_NO 2 showed shifts in the peak positions and a drop in the Mn 2+ contribution (19.0 → 11.0%).…”

Section: ■ Results and Discussionmentioning

confidence: 55%

“…NO 2 reduction to NO 2 − was possibly accompanied by the oxidation of the metal center (Figure S13c). 33,44 The shift in the peak positions was due to the interaction of the nitrite/nitrate species with the Mn sites. The increase in the proportion of 532.6 eV for chemisorbed O species (18.9 → 26.1%) was due to the formation of nitrite/nitrate species (Figure S13d).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Reactive Adsorption of SO₂ and NO₂ Gases over Black Mass Derived from Discarded Alkaline Batteries

Gupta,

Rajput,

Achary

et al. 2023

Energy Fuels

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Disposable Mn−Zn alkaline batteries possess valuable metal−metal oxides that could function as reusable adsorbent-catalysts to eliminate harmful SO 2 and NO 2 gases under typical environmental conditions. This research has validated that a single AA Energizer alkaline battery provides enough material to capture 326 mg of SO 2 (100 ppm) or 149 mg of NO 2 (100 ppm) for three cycles at 20 °C and 80% relative humidity. The battery-derived black mass acted as an ambient temperature catalyst and oxidized adsorbed SO 2 exclusively to sulfate ions. The composite exhibited redox behavior for NO 2 by converting it to nitrite and nitrate ions. The spectroscopic analyses confirmed the formation of reactive species on the black mass after the NO 2 and SO 2 exposure. Theoretical calculations confirmed the chemical adsorption of acidic gases over the black mass with reactivity following the order ZnO > MnO 2 > ZnMn 2 O 4 > Zn for the black mass constituent phases. The black mass encapsulated in calcium alginate hydrogel beads possessed a large SO 2 adsorption capacity of 82 mg g −1 , showing the excellent capability of the composite to work even as hydrogels.

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Section: ■ Results and Discussionmentioning

confidence: 55%

Section: ■ Results and Discussionmentioning

confidence: 99%

Reactive Adsorption of SO₂ and NO₂ Gases over Black Mass Derived from Discarded Alkaline Batteries

Gupta,

Rajput,

Achary

et al. 2023

Energy Fuels

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Adsorption Removal of NO₂ Under Low‐Temperature and Low‐Concentration Conditions: A Review of Adsorbents and Adsorption Mechanisms

Wang,

et al. 2024

Advanced Materials

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The efficient mitigation of harmful nitrogen oxides (NOx) under ambient conditions remains a challenging task. Selective adsorption offers a viable solution for the capture of low‐concentration NOx from the polluted stream at low temperatures. This review summarizes recent progress in the development of NO2 adsorbents, delves into the understanding of adsorption mechanisms, and discusses the criteria for evaluating their performance. First, the present NO2 adsorbents are categorized according to their distinct characteristics. This review then provides insights into the mechanisms of adsorption, highlighting the interaction between active sites and NO2, drawing from both experimental and theoretical research. The performance of these adsorbents is also assessed, focusing on their capacity, reusability, stability and selectivity. Finally, perspectives are proposed to address the significant challenges and explore potential advancements for NO2 adsorbents, aiming to enhance their suitability for diverse practical application scenarios.

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Engineering 2D Mg-Al-layered double oxides with highly dispersed and enhanced basic sites for efficient ambient NO2 reactive removal

Wu,

Chen,

et al. 2024

Catalysis Today

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Reactive adsorption of NO₂ over the NaCoO₂–Co₃O₄ nanocomposite: experimental study and first-principles calculations

Abstract: We have fabricated a NaCoO2-Co3O4 nanocomposite through high-temperature calcination of Na,Co-MOF precursor. The resulting nanocomposite features Co3O4 polyhedral nanoparticles decorated over NaCoO2 nanosheets. The composite possessed a surface area of...

Cited by 5 publications

References 55 publications

Reactive Adsorption of SO₂ and NO₂ Gases over Black Mass Derived from Discarded Alkaline Batteries

Reactive Adsorption of SO₂ and NO₂ Gases over Black Mass Derived from Discarded Alkaline Batteries

Adsorption Removal of NO₂ Under Low‐Temperature and Low‐Concentration Conditions: A Review of Adsorbents and Adsorption Mechanisms

Engineering 2D Mg-Al-layered double oxides with highly dispersed and enhanced basic sites for efficient ambient NO2 reactive removal

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Reactive adsorption of NO2 over the NaCoO2–Co3O4 nanocomposite: experimental study and first-principles calculations

Abstract: We have fabricated a NaCoO2-Co3O4 nanocomposite through high-temperature calcination of Na,Co-MOF precursor. The resulting nanocomposite features Co3O4 polyhedral nanoparticles decorated over NaCoO2 nanosheets. The composite possessed a surface area of...

Cited by 5 publications

References 55 publications

Reactive Adsorption of SO2 and NO2 Gases over Black Mass Derived from Discarded Alkaline Batteries

Reactive Adsorption of SO2 and NO2 Gases over Black Mass Derived from Discarded Alkaline Batteries

Adsorption Removal of NO2 Under Low‐Temperature and Low‐Concentration Conditions: A Review of Adsorbents and Adsorption Mechanisms

Engineering 2D Mg-Al-layered double oxides with highly dispersed and enhanced basic sites for efficient ambient NO2 reactive removal

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Product

Resources

About

Reactive adsorption of NO₂ over the NaCoO₂–Co₃O₄ nanocomposite: experimental study and first-principles calculations

Reactive Adsorption of SO₂ and NO₂ Gases over Black Mass Derived from Discarded Alkaline Batteries

Reactive Adsorption of SO₂ and NO₂ Gases over Black Mass Derived from Discarded Alkaline Batteries

Adsorption Removal of NO₂ Under Low‐Temperature and Low‐Concentration Conditions: A Review of Adsorbents and Adsorption Mechanisms