Network structure-based decorated CPA@CuO hybrid nanocomposite for methyl orange environmental remediation

AbstractA unique network core–shell hybrid design-based cross-linked polyaniline (CPA), which was coated with CuO nanoparticles (NPs) and decorated with nitrogen-doped SWCNT/GO/cellulose N-SWCNTS-GO-CE, has been fabricated using the oxidative polymerization technique. This hybrid nanocomposite shows excellent photocatalytic degradation and an acceptable adsorption capability for Methyl Orange (MO) dye in aqueous solutions with a very slight effect for the N-SWCNTS-GO-CE CuO component. The prepared nanocomposites were used for the removal of a carcinogenic and noxious dye, Methyl Orange, from aqueous samples under various adsorption conditions. Approximately 100% degradation of 10 mg/L of Methylene orange dye was observed within 100 min at pH 6.0 using 50 mg/L CPA/N-SWCNTS-GO-CE/CuO nanocomposite under UV radiation. Additionally, significant factors were investigated on the degradation process including the contact time, MO initial concentration (Ci), solution pH, and dosage of the CuO nanocomposite. All investigated experiments were performed under UV radiation, which provided significant data for the MO degradation process. Furthermore, the recovery of the nanocomposite was studied based on the photocatalytic process efficiency. The obtained data provide the high opportunity of reusing CPA/N-SWCNTS-GO-CE/CuO nanocomposite for numerous photocatalytic processes. The CPA/N-SWCNTS-GO-CE/CuO nanocomposite was prepared via chemical oxidative copolymerization of polyaniline (PANI) with p-phenylenediamine (PPDA) and triphenylamine (TPA) in the presence of N-SWCNTS-GO-CE and CuO NPs. The morphology, structure and thermal properties of the CPA/N-SWCNTS-GO-CE/CuO nanocomposite were investigated using various techniques, including FTIR, XRD, RAMAN, SEM, MAP, EDX, TEM, TGA and DTG. Therefore, CPA/N-SWCNTS-GO-CE/CuO nanocomposite can be effectively used as a convenient and reusable adsorbent to remove hazardous dye from wastewater.

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Author Correction: Network structure-based decorated CPA@CuO hybrid nanocomposite for methyl orange environmental remediation

Scientific Reports ◽

10.1038/s41598-021-99791-y ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Dina F. Katowah ◽

Sayed M. Saleh ◽

Sara A. Alqarni ◽

Reham Ali ◽

Gharam I. Mohammed ◽

...

Keyword(s):

Methyl Orange ◽

Network Structure ◽

Environmental Remediation ◽

Hybrid Nanocomposite

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Kinetic of oxidation of methyl orange by vanadium(V) under conditions VO2+ and decavanadates coexist: Catalysis by Triton X-100 micellar medium

10.31221/osf.io/m9g7p ◽

2019 ◽

Author(s):

Chem Int

Keyword(s):

Methyl Orange ◽

Solution Ph ◽

Vanadium Concentration ◽

Limiting Behavior ◽

First Order ◽

First Order Kinetics ◽

Ph Range ◽

Kinetic Pattern ◽

Triton X ◽

Kinetics Of

The kinetics of oxidation of methyl orange by vanadium(V) {V(V)} has been investigated in the pH range 2.3-3.79. In this pH range V(V) exists both in the form of decavanadates and VO2+. The kinetic results are distinctly different from the results obtained for the same reaction in highly acidic solution (pH < 1) where V(V) exists only in the form of VO2+. The reaction obeys first order kinetics with respect to methyl orange but the rate has very little dependence on total vanadium concentration. The reaction is accelerated by H+ ion but the dependence of rate on [H+] is less than that corresponding to first order dependence. The equilibrium between decavanadates and VO2+ explains the different kinetic pattern observed in this pH range. The reaction is markedly accelerated by Triton X-100 micelles. The rate-[surfactant] profile shows a limiting behavior indicative of a unimolecular pathway in the micellar pseudophase.

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Superior Degradation Performance of Nanoporous Copper Catalysts on Methyl Orange

Metals ◽

10.3390/met11060913 ◽

2021 ◽

Vol 11 (6) ◽

pp. 913

Author(s):

Jinyi Wang ◽

Sen Yang

Keyword(s):

Activation Energy ◽

Methyl Orange ◽

High Efficiency ◽

Low Cost ◽

Degradation Process ◽

Copper Catalysts ◽

Reaction Rate Constant ◽

Nanoporous Structure ◽

Intra Particle Diffusion ◽

Different Temperatures

The development of low-cost and high-efficiency catalysts for wastewater treatment is of great significance. Herein, nanoporous Cu/Cu2O catalysts were synthesized from MnCu, MnCuNi, and MnCuAl with similar ligament size through one-step dealloying. Meanwhile, the comparisons of three catalysts in performing methyl orange degradation were investigated. One of the catalysts possessed a degradation efficiency as high as 7.67 mg·g−1·min−1. With good linear fitting by the pseudo-first-order model, the reaction rate constant was evaluated. In order to better understand the degradation process, the adsorption behavior was considered, and it was divided into three stages based on the intra-particle diffusion model. Three different temperatures were applied to explore the activation energy of the degradation. As a photocatalytic agent, the nanoporous structure of Cu/Cu2O possessed a large surface area and it also had low activation energy, which were beneficial to the excellent degradation performance.

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Photocatalytic Degradation of Methyl Orange by TiO2/Schorl Photocatalyst: Kinetics and Thermodynamics

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.713-715.2789 ◽

2015 ◽

Vol 713-715 ◽

pp. 2789-2792

Author(s):

Huan Yan Xu ◽

Xue Li ◽

Yan Li ◽

Ping Li ◽

Wei Chao Liu

Keyword(s):

Methyl Orange ◽

Reaction Rate ◽

Reaction Kinetic ◽

Kinetic Studies ◽

Reaction Rate Constant ◽

Order Reaction ◽

Solution Ph ◽

Kinetics And Thermodynamics ◽

Hoff Equation ◽

Degradation Of Methyl Orange

An active dye, Methyl Orange (MO) was employed as the target pollutant to evaluate the photocatalytic activity of TiO2/schorl composite and the kinetics and thermodynamics of this process was emphasized in this work. Langmuir–Hinshelwood kinetic model was employed for the kinetic studies and the results revealed that the process of MO photocatalytic discoloration by TiO2/schorl composite followed one order reaction kinetic equation under different conditions. The reaction rate constant (k) increased with initial MO concentration decreasing. When the catalyst dosage or solution pH increased,kvalues increased and then decreased. The possible reasons for these phenomena were discussed. Finally, the thermodynamic parameters ΔG, ΔH, ΔSwere obtained by the classical Van't Hoff equation.

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Co3O4/TiO2 hetero-structure for methyl orange dye degradation

Water Science & Technology ◽

10.2166/wst.2018.383 ◽

2018 ◽

Vol 79 (5) ◽

pp. 947-957 ◽

Cited By ~ 7

Author(s):

Mahabubur Chowdhury ◽

Sarah Kapinga ◽

Franscious Cummings ◽

Veruscha Fester

Keyword(s):

Catalytic Activity ◽

Methyl Orange ◽

Environmental Remediation ◽

Metal Ion ◽

Dye Degradation ◽

Lattice Structure ◽

Host Lattice ◽

Commercial Application ◽

Potential Candidate ◽

Methyl Orange Degradation

Abstract Advanced oxidation processes based on sulphate radical generated by peroxymonosulphate (PMS) activation is a promising area for environmental remediation. One of the biggest drawbacks of heterogeneous PMS activation is catalyst instability and metal ion leaching. In this study, a simple organic binder mediated route was explored to substitute Ti4+ ions into the Co3O4 host lattice structure to create a Co-O-Ti bond to minimise cobalt leaching during methyl orange degradation. The catalyst was characterised by X-ray diffraction, and scanning and transmission electron microscopy. The as-prepared catalysts with Co3O4:TiO2 ratio of 70:30 exhibited minimal leaching (0.9 mg/L) compared to other ratios studied. However, the pristine Co3O4 exhibited highest catalytic activity (rate constant = 0.41 min−1) and leaching (26.7 mg/L) compared to composite material (70:30 Co3O4:TiO2). Interestingly, the morphology of the composite and leaching of Co2+ ions were found to be temperature dependent, as an optimum temperature ensured strong Co-O-Ti bond for prevention of Co2+ leaching. The classical quenching test was utilised to determine the presence and role of radical species on methyl orange degradation. The fabricated catalyst also exhibited good catalytic activity in degrading mixed dyes and good recyclability, making it a potential candidate for commercial application.

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Green synthesis of the innovative super paramagnetic nanoparticles from the leaves extract of Fraxinus chinensis Roxb and their application for the decolourisation of toxic dyes

Green Processing and Synthesis ◽

10.1515/gps-2018-0078 ◽

2019 ◽

Vol 8 (1) ◽

pp. 256-271 ◽

Cited By ~ 12

Author(s):

Imran Ali ◽

Changsheng Peng ◽

Dichu Lin ◽

Iffat Naz

Keyword(s):

Environmental Remediation ◽

Degradation Mechanism ◽

Pseudo First Order Reaction ◽

Solution Ph ◽

Factors Affecting ◽

Toxic Dyes ◽

Degradation Of Dyes ◽

Stability Structure ◽

Ft Ir ◽

Fraxinus Chinensis

Abstract The leaves extract of Fraxinus chinensis Roxb was used for the synthesis of the innovative phytogenic magnetic nanoparticles (PMNPs) without adding toxic surfactants. The formation, morphology, elemental composition, size, thermal stability, structure and magnetic properties of these PMNPs were examined by UV-visible spectrophotometry, FT-IR, XRD, SEM, EDX, TEM, VSM, XPS, BET and TGA. The reactivity of the obtained PMNPs against decolourising toxic dyes, namely, malachite green (MG), crystal violet (CV) and methylene blue (MB), were investigated by UV-vis spectrophotometry. Further, the factors affecting the removal of dyes, including solution pH, adsorbent dosages, initial concentration of dyes, reaction temperature and contact time, were also investigated. The results revealed the decolourisation of 99.12% of MG and 98.23% of CV within 60 min, and 97.52% of MB within 200 min by the PMNPs using dyes concentration of 25 mg/l at pH 6.5 and 298.15 K. The kinetics outcome indicated that the degradation of dyes matched well to the pseudo first-order reaction kinetics model. Furthermore, the probable degradation mechanism of dyes by the PMNPs, including the adsorption of cationic dye molecules onto the negatively charged surface of adsorbent and the oxidation of the Fe° in the solution, were discussed. Thus, the PMNPs can be produced by the bulk and have great potential to be employed for biomedical/environmental remediation.

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Study of photocatalytic activity of TiO2 fluorinated by thermal shock method for the degradation of different dyes

Science and Technology Development Journal ◽

10.32508/stdj.v18i2.1173 ◽

2015 ◽

Vol 18 (2) ◽

pp. 121-131

Author(s):

Khoa Tien Le ◽

Ngoc Chau Hoang ◽

Tien Thuy Thai ◽

Anh Trung Le ◽

Thinh Nguyen Huu Pham ◽

...

Keyword(s):

Methylene Blue ◽

Photocatalytic Activity ◽

Methyl Orange ◽

Thermal Shock ◽

Photocatalytic Oxidation ◽

Organic Dyes ◽

Cationic Dye ◽

Solution Ph ◽

Ph Values ◽

Methylene Blue Cationic Dye

TiO2 P25 was fluorinated by thermal shock method in order to study the influence of thermal shock fluorination on the surface properties and the photocatalytic activity for the degradation of cationic and anionic organic dyes at different pH values. The surface charge of catalysts was characterized by the pHPZC measurement. The photocatalytic activity of catalysts was evaluated via the degradation of methylene blue (cationic dye) and methyl orange (anionic dye). The results showed that the thermal shock fluorination and the rise of solution pH can increase the surface negative charge of TiO2, which enhanced the adsorption of methylene blue and then improved the photocatalytic degradation of this cationic dye under UV and visible light. On the other hand, after the fluorination, the adsorption of methyl orange on TiO2 was strongly reduced, which limited the photocatalytic oxidation of this anion dye.

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Comparative Studied of Degradation of Textile Brilliant Reactive Red Dye Using H2O2, TiO2, UV and Sunlight

Al-Nahrain Journal for Engineering Sciences ◽

10.29194/njes.22010031 ◽

2019 ◽

Vol 22 (1) ◽

pp. 31-36

Author(s):

Forqan Mohammed ◽

Khalid M. Mousa

Keyword(s):

Reaction Time ◽

Ambient Temperature ◽

Uv Radiation ◽

Advanced Oxidation Process ◽

Oxidation Process ◽

Textile Wastewater ◽

Cost Effective ◽

H2o2 Concentration ◽

Solution Ph ◽

Red Dye

In this study sunlight and UV radiation were used to compare the efficiency of decolorization of textile wastewater containing brilliant reactive red dye K-2BP (λmax = 534 nm) by the advanced oxidation process (AOP) using (H2O2/sunlight, H2O2/UV, H2O2/TiO2/sunlight, and H2O2/TiO2/UV). The results studied the effect of solution pH, applied H2O2 concentration, TiO2 concentration (nanoparticle), and initial dye concentration were studied. The experimental results showed that decolorization percentage with H2O2/sunlight and TiO2/H2O2/sunlight under the following conditions: - reaction time 150 of minutes, [ 500 ppm] H2O2, [100 ppm] TiO2, pH=3, initial dye concentration =15 ppm and at ambient temperature were 95.7% and 98.42% respectively. For the same conditions using H2O2/UV, H2O2/TiO2 /UV, the percentage of decolorization were 97.85% and 96.33% respectively. The results also indicated that the sunlight is more economic and cost-effective than UV radiation.

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Synthesis of Polyaniline coated Graphene Oxide @ SrTiO3 Nanocube Nanocomposites for Enhanced Removal of Carcinogenic Dyes from Aqueous Solution

10.20944/preprints201608.0128.v1 ◽

2016 ◽

Cited By ~ 2

Author(s):

Syed Shahabuddin ◽

Norazilawati Muhamad Sarih ◽

Muhammad Afzal Kamboh ◽

Hamid Rashidi Nodeh ◽

Sharifah Mohamad

Keyword(s):

Electron Microscopy ◽

Aqueous Solution ◽

Methylene Blue ◽

Graphene Oxide ◽

Methyl Orange ◽

Oxidative Polymerization ◽

X Ray Diffraction ◽

Transmission Electron ◽

Polymerization Method

The present investigation highlights the synthesis of polyaniline (PANI) coated graphene oxide doped with SrTiO3 nanocube nanocomposites through facile in-situ oxidative polymerization method for the efficient removal of carcinogenic dyes, namely, the cationic dye methylene blue (MB) and the anionic dye methyl orange (MO). The synthesised nanocomposites were characterised by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). The adsorption efficiencies of graphene oxide (GO), PANI homopolymer and SrTiO3 nanocubes-doped nanocomposites were assessed by monitoring the adsorption of methylene blue and methyl orange dyes from aqueous solution. The adsorption efficiency of nanocomposites doped with SrTiO3 nanocubes were found to be of higher magnitude as compared with undoped nanocomposite. Moreover, the nanocomposite with 2 wt% SrTiO3 with respect to graphene oxide demonstrated excellent adsorption behaviour with 99% and 91% removal of MB and MO respectively, in a very short duration of time.

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