Synthesis and characterization of reduced graphene oxide–V2O5 nanocomposite for enhanced photocatalytic activity under different types of irradiation

Aawani, Elaheh; Memarian, Nafiseh; Dizaji, H. Rezagholipour

doi:10.1016/j.jpcs.2018.09.028

Cited by 67 publications

(16 citation statements)

References 64 publications

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“…where C 0 is the initial concentration of BTEX and C t is the concentration of BTEX at reaction time t. The slope (0.01079 min −1 ) of a linear plot gives the apparent first-order reaction rate constant (K app ). 45 The influence of additives like NaCl, Na 2 CO 3 , NaNO 3 , H 2 O 2 and Na 2 SO 4 on BTEX degradation was studied ( Fig. 7(b)) taking into consideration the aforesaid optimal conditions: BTEX initial concentration (50 mg L −1 ), catalyst loading (0.50 g L −1 ) and pH (3).…”

Section: Resultsmentioning

confidence: 99%

Enhanced visible light photocatalysis with E‐waste‐based V₂O₅/zinc–ferrite: BTEX degradation and mechanism

Mohan

Lim

Lee

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND: BTEX removal is attracting increased attention owing to the detrimental impacts caused to human health, the foremost being neurological impairments. Thus, this study intended to assess the efficiency of zinc-ferrite/V 2 O 5 (ZFV) nanocomposite for photocatalytic degradation of BTEX isomers in aqueous solution. Furthermore, the developed catalyst was magnetically separable, which may reduce the ecological impacts of the catalyst. RESULTS: The ZFV nanocomposite was prepared by a solvothermal process using V 2 O 5 (extracted from treated E-waste) and zincferrite (synthesized through a chemical co-precipitation method). The integration of elements in the ZFV nanocomposite was confirmed using powder X-ray diffraction, Fourier transform infrared, Raman, diffuse reflectance and electrochemical impedance spectroscopies and scanning electron microscopy. Maximum BTEX degradation of 95% was achieved at 50 mg L −1 initial BTEX concentration, 0.50 g L −1 catalyst and pH 3. A minor decrease in the degradation efficiency (10%) of the catalyst was observed at the fifth cycle. The presence of H 2 O 2 increased the degradation efficiency to 98% owing to the prevention of electron-hole recombination, while NaCl (60%), Na 2 CO 3 (63%), NaNO 3 (80%) and Na 2 SO 4 (72%) decreased the degradation efficiency due to their hydroxyl scavenging properties. The degradation pathway was elucidated using gas chromatography with mass spectral studies. CONCLUSIONS: The findings of the present study relating to BTEX degradation using the magnetic ZFV nanocomposite and the degradation mechanism throw light on the environmental applications of the ZFV composite. The composite could be an alternative for the remediation of BTEX-contaminated wastewaters.

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Section: Resultsmentioning

confidence: 99%

Enhanced visible light photocatalysis with E‐waste‐based V₂O₅/zinc–ferrite: BTEX degradation and mechanism

Mohan

Lim

Lee

et al. 2020

J of Chemical Tech & Biotech

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“…e photothermal effect of Gr can enhance the catalytic efficiency of traditional thermal catalysts. Table 3 shows Gr and metal oxides are excellent materials for use in the photocatalytic degradation of dye [57][58][59][60][61]. For example, the photocatalytic efficiency of Gr/SnO 2 composites prepared by Othmen et al for the degradation of rhodamine B was 93%.…”

Section: Applications Of Graphene/inorganic Composite Materialsmentioning

confidence: 99%

A Review on the Contemporary Development of Composite Materials Comprising Graphene/Graphene Derivatives

Long

Weng

2020

Advances in Materials Science and Engineering

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As two-dimensional materials with a high specific surface area, strength, and electrical and thermal conductivity, graphene (Gr) and its derivatives have great application prospects in various fields such as structural reinforcement, energy storage, optics, and electrical and thermal conductivity. However, the current preparation method of Gr is complicated and expensive. Its preparation cost can be reduced using Gr composites that include inorganic materials or other polymers. Composite materials comprising Gr and inorganic materials are generally prepared using sinter molding, chemical reduction, or chemical deposition. Gr should be able to mitigate several of the defects resulting from inorganic materials, including their poor toughness, small specific capacity, and low photoelectric conversion rate. The mitigation of these defects should result in the expansion of the applications of Gr composites for use in capacitors, catalysts, and sensors, among other devices. Although solution blending or in situ polymerization produces a relatively good mixing effect, in general, melt blending is used in the large-scale processing of Gr composites with polymer materials. Gr can be used to partially mitigate several weaknesses of polymer materials, including their low strength, poor electrical and thermal conductivities, and poor isolation performance, and expand the applications of Gr composites for use in electrical and thermal conductive materials and functional membrane materials, among other applications. The goal of the present paper is to introduce the structural properties of Gr and a surface modification method for Gr. In addition, the preparation methods and application fields of different Gr composite materials are reviewed. Finally, the development prospects and key issues are discussed.

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“…V 2 O 5 is highly abundant in nature, it has low price and has several oxidation states [7,8]. Accordingly, due to its relatively open layered structure and its unique properties, V 2 O 5 has been used in different applications such as water splitting [9], field effect transistors [10,11], supercapacitors [12], IR detectors [13], photodetectors [14], UV sensors [15], optical sensors [16], amprometric gas sensors [17], potentiometric sensors [18] electrochemical sensors [19,20], cataluminescence sensors [21], resistance gas sensors [22,23], gasochromic sensors [24] and humidity sensors [25].…”

Section: Introductionmentioning

confidence: 99%

A Review of Nanostructured Resistive-Based Vanadium Oxide Gas Sensors

et al. 2020

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Vanadium pentoxide (V2O5) is a transition metal oxide with features such as high availability, good catalytic activity, unique electrical properties and high conductivity which are appropriate for gas sensing applications. In this review, we discuss different gas sensing aspects of V2O5 in pristine, doped, decorated and composite forms. Depending on its synthesis procedure, morphology, sensing temperature and surface conditions, the V2O5-based gas sensors show different responses to target gases. Herein, we have discussed the behavior of V2O5-based gas sensors to different gases and associated sensing mechanisms. This review paper can be a useful reference for the researchers who works in the field of gas sensors.

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Synthesis and characterization of reduced graphene oxide–V2O5 nanocomposite for enhanced photocatalytic activity under different types of irradiation

Cited by 67 publications

References 64 publications

Enhanced visible light photocatalysis with E‐waste‐based V₂O₅/zinc–ferrite: BTEX degradation and mechanism

Enhanced visible light photocatalysis with E‐waste‐based V₂O₅/zinc–ferrite: BTEX degradation and mechanism

A Review on the Contemporary Development of Composite Materials Comprising Graphene/Graphene Derivatives

A Review of Nanostructured Resistive-Based Vanadium Oxide Gas Sensors

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Synthesis and characterization of reduced graphene oxide–V2O5 nanocomposite for enhanced photocatalytic activity under different types of irradiation

Cited by 67 publications

References 64 publications

Enhanced visible light photocatalysis with E‐waste‐based V2O5/zinc–ferrite: BTEX degradation and mechanism

Enhanced visible light photocatalysis with E‐waste‐based V2O5/zinc–ferrite: BTEX degradation and mechanism

A Review on the Contemporary Development of Composite Materials Comprising Graphene/Graphene Derivatives

A Review of Nanostructured Resistive-Based Vanadium Oxide Gas Sensors

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Enhanced visible light photocatalysis with E‐waste‐based V₂O₅/zinc–ferrite: BTEX degradation and mechanism

Enhanced visible light photocatalysis with E‐waste‐based V₂O₅/zinc–ferrite: BTEX degradation and mechanism