Low-temperature synthesis of manganese oxide–carbon nanotube-enhanced microwave-absorbing nanocomposites

Pang, Huifang; Abdalla, Ahmed M.; Sahu, Rakesh P.; Duan, Yuping; Puri, Ishwar K.

doi:10.1007/s10853-018-2807-1

Cited by 34 publications

(6 citation statements)

References 48 publications

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“…These results indicate the successful preparation of hierarchical Mn 3 O 4 /ZSM-5 samples. On the other hand, a sharp peak between 2θ = 15-20 • is also observed at XRD pattern of as-prepared Mn3O4 (Figure 1c), according to JCPDS: 44-0141, the peak belongs to MnO 2 [21]. FTIR analysis of ZSM-5 zeolites and manganese oxide-modified counterpart is summarized in Figure 2.…”

Section: Catalyst Characterizationmentioning

confidence: 89%

Levulinic Acid Production from Delignified Rice Husk Waste over Manganese Catalysts: Heterogeneous Versus Homogeneous

2020

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Delignified rice husk waste (25.66% (wt) cellulose) was converted to levulinic acid using three types of manganese catalysts, i.e., the Mn3O4/hierarchical ZSM-5 zeolite and Mn3O4 heterogenous catalysts, as well as Mn(II) ion homogeneous counterpart. The hierarchical ZSM-5 zeolite was prepared using the double template method and modified with Mn3O4 through wet-impregnation method. The structure and physicochemical properties of the catalyst materials were determined using several solid-state characterization techniques. The reaction was conducted in a 200 mL-three neck-round bottom flask at 100 °C and 130 °C for a certain reaction time in the presence of 10% (v/v) phosphoric acid and 2% (v/v) H2O2 aqueous solution, and the product was analyzed using HPLC. In general, 5-hydroxymethyl furfural (5-HMF) as the intermediate product was produced after 2 h and decreased after 4 h reaction time. To conclude, the Mn3O4/hierarchical ZSM-5 heterogenous catalyst gave the highest yield (wt %) of levulinic acid (39.75% and 27.60%, respectively) as the main product, after 8 h reaction time.

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Section: Catalyst Characterizationmentioning

confidence: 89%

Levulinic Acid Production from Delignified Rice Husk Waste over Manganese Catalysts: Heterogeneous Versus Homogeneous

2020

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“…Unlike 1D MnO 2 , the flower-like architecture of deposited MnO 2 nanosheets have a larger specific surface area and are uniformly anchored on a 3D graphene framework with strong adhesion, there is a strong interaction between them, so the prepared hybrids showed good mechanical properties. Pang et al [ 178 ] proposed a simple room-temperature water bath method to deposit crystalline MnO 2 on CNTs to prepare CNT-MnO 2 nanocomposites. This scheme can control the phases and morphologies of the composite products by changing the pH of the reaction solution.…”

Section: Preparation Methods Of Mno 2 -Carbon Comp...mentioning

confidence: 99%

Preparation of MnO2-Carbon Materials and Their Applications in Photocatalytic Water Treatment

et al. 2023

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Water pollution is one of the most important problems in the field of environmental protection in the whole world, and organic pollution is a critical one for wastewater pollution problems. How to solve the problem effectively has triggered a common concern in the area of environmental protection nowadays. Around this problem, scientists have carried out a lot of research; due to the advantages of high efficiency, a lack of secondary pollution, and low cost, photocatalytic technology has attracted more and more attention. In the past, MnO2 was seldom used in the field of water pollution treatment due to its easy agglomeration and low catalytic activity at low temperatures. With the development of carbon materials, it was found that the composite of carbon materials and MnO2 could overcome the above defects, and the composite had good photocatalytic performance, and the research on the photocatalytic performance of MnO2-carbon materials has gradually become a research hotspot in recent years. This review covers recent progress on MnO2-carbon materials for photocatalytic water treatment. We focus on the preparation methods of MnO2 and different kinds of carbon material composites and the application of composite materials in the removal of phenolic compounds, antibiotics, organic dyes, and heavy metal ions in water. Finally, we present our perspective on the challenges and future research directions of MnO2-carbon materials in the field of environmental applications.

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“…Because of the special electrical conductivity, excellent mechanical strength, and stable physical/chemical property, as well as its wide frequency band, light weight, and good compatibility, carbon nanotubes are considered to be the most promising materials in next-generation EMWA materials. Pang et al 120 synthesized a CNT-based manganese oxide nanocomposite with a facile, low-cost, scalable, and high-yield process (Figure 7a). As shown in Figure 7b−d, the introduction of hollow CNTs not only enriched the loss mechanism of the materials but also improved the impedance matching of the materials.…”

Section: Structure Design Of 1d Emwa Nanomaterialsmentioning

confidence: 99%

Section: Structure Design Of 1d Emwa Nanomaterialsmentioning

confidence: 99%

Recent Progress of One-Dimensional Nanomaterials for Microwave Absorption: A Review

Wang

Zhu

Han

et al. 2023

ACS Appl. Nano Mater.

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With the increasing problems of electromagnetic interference and electromagnetic radiation, electromagnetic wave absorption (EMWA) materials have received considerable attention in civil and military fields. Among various EMWA materials, one-dimensional (1D) nanomaterials are recognized as a very promising candidate because of their unique aspect ratio, special shape anisotropy, large specific surface area, and simple manufacturing process. Herein, this paper presents a comprehensive review of recent research progress of 1D nanomaterials for EMWA applications, with a special focus on the advances in general preparation strategies and microscopic structure construction. Furthermore, the current challenge and future prospect of 1D electromagnetic absorbers are proposed, which should provide some guidelines for the design of advanced EMWA materials.

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Low-temperature synthesis of manganese oxide–carbon nanotube-enhanced microwave-absorbing nanocomposites

Cited by 34 publications

References 48 publications

Levulinic Acid Production from Delignified Rice Husk Waste over Manganese Catalysts: Heterogeneous Versus Homogeneous

Levulinic Acid Production from Delignified Rice Husk Waste over Manganese Catalysts: Heterogeneous Versus Homogeneous

Preparation of MnO2-Carbon Materials and Their Applications in Photocatalytic Water Treatment

Recent Progress of One-Dimensional Nanomaterials for Microwave Absorption: A Review

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