Photocatalytic degradation of methylene blue by ZnO/NiFe2O4 nanoparticles

Adeleke, J.T.; Thirugnanasambandan, Theivasanthi; Thiruppathi, Murugan; Swaminathan, M.; Akomolafe, T.; Alabi, Aderemi Babatunde

doi:10.1016/j.apsusc.2018.05.184

Cited by 247 publications

(94 citation statements)

References 39 publications

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“…In case of NiFe 2 O 4 /Pth composite, the peaks at 609 and 500 cm −1 are ascribed to tetrahedral site (Fe–O) and octahedral site (Ni–O) stretching, respectively, due to inverse spinel ferrite . The broad peaks around 3,700–3,000 cm −1 are due to O─H stretching . The peaks between 1,092–1,098 cm −1 and 784–790 cm −1 indicate (O–H) in‐plane and out‐plane mode, respectively.…”

Section: Resultsmentioning

confidence: 99%

Preparation of NiFe₂O₄/polythiophene nanocomposite and its enhanced adsorptive uptake of Janus green B and Fuchsin basic from aqueous solution: Isotherm and kinetics studies

Hussain

Siddiqui

Khan

2019

Env Prog and Sustain Energy

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NiFe 2 O 4 /polythiophene nanocomposite was synthesized by in situ chemical oxidative polymerization of thiophene in NiFe 2 O 4 nanoparticles presence, whereas NiFe 2 O 4 nanoparticles were prepared via coprecipitation method. Fourier transform infrared (FTIR), X-ray diffraction (XRD), UV-Visible, and SEM, EDX techniques were used for characterization of the nanocomposite. The effect of various parameters such as adsorbent dose, contact time, initial dye concentration, and initial pH of solution on the adsorption of Janus green B (JG) and Fuchsin basic (FB) onto the nanocomposite was optimized by batch studies. The equilibrium uptake data ascribed well to the Langmuir model with maximum adsorption capacity of 143 and 498 mg/g at 303 K for JG and FB, respectively. The exceptional high adsorption capacity of NiFe 2 O 4 /polythiophene nanocomposite for JG and FB was ascribed to π-π and electrostatic interactions. Kinetics studies pointed out that JG and FB removal followed pseudo-second order model. The negative values of ΔH (JG: -47.28; FB: −38.00 kJ/ mol) and ΔG (JG: −9.347 to −6.442; FB: −14.16 to -12.85 kJ/mol) pointed out the feasibility, spontaneity, and exothermic nature of removal process. Negative value of ΔS (JG: -0.125; FB: -0.078 kJ/mol) suggested decrease in randomness at the solid/ liquid interface. The results showed that NiFe 2 O 4 /polythiophene is an appealing adsorbent for the uptake of JG and FB dyes from aquatic environment. K E Y W O R D S adsorption, Fuchsin basic, Janus green B, NiFe 2 O 4 /polythiophene nanocomposite, non-linear regression analyses, thermodynamics

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Section: Resultsmentioning

confidence: 99%

Preparation of NiFe₂O₄/polythiophene nanocomposite and its enhanced adsorptive uptake of Janus green B and Fuchsin basic from aqueous solution: Isotherm and kinetics studies

Hussain

Siddiqui

Khan

2019

Env Prog and Sustain Energy

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“…Recently, many semiconductors have been under usage as photocatalyst such as TiO 2 , ZnO, WO 3 , MgO, SiO 2 , Fe 2 O 3 , and CdS. [10][11][12][13][14][15][16] Semiconductor photocatalysts have recently demonstrated high photocatalytic activity for decontamination of organic compounds in aqueous solutions. Typically, titania has been revealed as a promising catalyst and has been widely used in photocatalytic degradation of organic contaminants due to its electrochemical properties, low cost, availability, high stability and non-toxicity.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic decontamination of phenol and petrochemical wastewater through ZnO/TiO₂ decorated on reduced graphene oxide nanocomposite: influential operating factors, mechanism, and electrical energy consumption

et al. 2018

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anchored on a reduced graphene oxide (rGO) ternary nanocomposite heterojunction was synthesized via the multi-step method including hydrothermal, solvothermal and sol-gel methods. XRD, Raman, FESEM, EDX, Dot Mapping EDS, BET, FTIR, UV-VIS, TGA, and EIS techniques were utilized for characterizing as-synthesized catalysts. The XRD and Raman data proved the formation of anatase phase TiO 2 and wurtzite phase ZnO in the prepared samples. Further, the UV-Vis spectrum confirmed that the band gap value of ZnO/TiO 2 diminished on introduction of graphene oxide. Photocatalytic performance of the fabricated catalysts was investigated by decontamination of phenol in aqueous solutions. The effect of different operational factors such as pH, catalyst dosage, phenol concentration, and light illumination was investigated to find the optimum decontamination conditions. According to the results, complete degradation of phenol was achieved at pH ¼ 4, catalyst dosage of 0.6 g L À1 , light intensity of 150 W, and phenol initial concentration of 60 ppm at 160 min under visible light illumination. With the addition of graphene oxide to the composite, a significant increase was detected in the photocatalytic performance due to the higher available surface area and lower electron/hole recombination rate. In addition, the scavenging experiments revealed that the $OH is responsible for the degradation of phenol during the reaction. The degradation mechanism, economic performance, mineralization, and recyclability were also investigated. Kinetic studies confirmed that photocatalytic degradation process followed the pseudo-first-order kinetic model. A case of real wastewater treatment was used to examine the performance of the catalyst for real case studies.

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“…ICBSA 2018 A semiconductor can undergo a photoinduced process upon irradiation. This will consist of the promotion of one electron from the VB to the CB, leaving a hole in the valence band and thus creating the photogenerated e − /h + pair [18,26,27]. This process takes place when light with wave-length within the energy range of the semiconductor bandgap interacts with the solid.…”

Section: Determination Of the Optimum Weight Of N-doped Tio 2 Catalysmentioning

confidence: 99%

Photocatalytic degradation of Direct Yellow-27 by photolysis with UV-light and solar irradiation Using N-doped TiO2

Deliza¹,

Safni²,

Wellia³

et al. 2019

KEG

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Photocatalytic degradation of methylene blue by ZnO/NiFe2O4 nanoparticles

Cited by 247 publications

References 39 publications

Preparation of NiFe₂O₄/polythiophene nanocomposite and its enhanced adsorptive uptake of Janus green B and Fuchsin basic from aqueous solution: Isotherm and kinetics studies

Preparation of NiFe₂O₄/polythiophene nanocomposite and its enhanced adsorptive uptake of Janus green B and Fuchsin basic from aqueous solution: Isotherm and kinetics studies

Photocatalytic decontamination of phenol and petrochemical wastewater through ZnO/TiO₂ decorated on reduced graphene oxide nanocomposite: influential operating factors, mechanism, and electrical energy consumption

Photocatalytic degradation of Direct Yellow-27 by photolysis with UV-light and solar irradiation Using N-doped TiO2

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Photocatalytic degradation of methylene blue by ZnO/NiFe2O4 nanoparticles

Cited by 247 publications

References 39 publications

Preparation of NiFe2O4/polythiophene nanocomposite and its enhanced adsorptive uptake of Janus green B and Fuchsin basic from aqueous solution: Isotherm and kinetics studies

Preparation of NiFe2O4/polythiophene nanocomposite and its enhanced adsorptive uptake of Janus green B and Fuchsin basic from aqueous solution: Isotherm and kinetics studies

Photocatalytic decontamination of phenol and petrochemical wastewater through ZnO/TiO2 decorated on reduced graphene oxide nanocomposite: influential operating factors, mechanism, and electrical energy consumption

Photocatalytic degradation of Direct Yellow-27 by photolysis with UV-light and solar irradiation Using N-doped TiO2

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Preparation of NiFe₂O₄/polythiophene nanocomposite and its enhanced adsorptive uptake of Janus green B and Fuchsin basic from aqueous solution: Isotherm and kinetics studies

Preparation of NiFe₂O₄/polythiophene nanocomposite and its enhanced adsorptive uptake of Janus green B and Fuchsin basic from aqueous solution: Isotherm and kinetics studies

Photocatalytic decontamination of phenol and petrochemical wastewater through ZnO/TiO₂ decorated on reduced graphene oxide nanocomposite: influential operating factors, mechanism, and electrical energy consumption