Visible light sensitive activated carbon-metal oxide (TiO<sub>2</sub>, WO<sub>3</sub>, NiO, and SnO) nano-catalysts for photo-degradation of methylene blue: a comparative study

El‐Salamony, Radwa A.; Amdeha, Enas; Badawy, Nagwa A.; Ghoneim, Salwa A.; Al-Sabagh, A.M.

doi:10.1080/02772248.2018.1497634

Cited by 30 publications

(14 citation statements)

References 44 publications

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“…However, the efficiency of phenol photodegradation under visible light enhanced and is in the order of ZnO (50%) < WO 3 (60%) < BiOBr (66.5%) < BiOBr/ZnO (73%) < BiOBr/WO 3 (81%) < BiOBr/ZnO/WO 3 (90%), which may be attributed to ZnO and WO 3 photocatalysts operating as an acceptor of the electron, which is helpful for the efficient isolation of electron–hole pairs generated in the system and prevent their recombination. 27 …”

Section: Resultsmentioning

confidence: 99%

“…Relying on the solution concentration, kinetic information was gained by studying the pseudo-first-order kinetic system ( eq 6 ), while depending upon the sorption equilibrium capacity, the pseudo-second-order kinetic model ( eq 7 ) was studied. 26 , 27 where the first-order rate constant is given by K 1 (min –1 ), the second-order rate constant by K 2 (g mg –1 min –1 ), and the quantity of phenol uptake at equilibrium by q e .…”

Section: Experimental Sectionmentioning

confidence: 99%

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Ternary Photodegradable Nanocomposite (BiOBr/ZnO/WO₃) for the Degradation of Phenol Pollutants: Optimization and Experimental Design

Ali

Motawea

2021

ACS Omega

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The degradation of environmental contaminants with photocatalysts has bright prospects for application in the control of pollution. In this study, BiOBr/ZnO/WO 3 heterojunctions have been documented to be reliable visible-light photocatalysts for phenol deterioration. X-ray diffraction, X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, photoluminescence spectral analysis, electrochemical impedance spectroscopy (EIS), EIS Bode plots, linear sweep voltammetry, and UV–visible diffuse reflectance spectroscopy were employed to describe the heterojunction’s structure in addition to its optical features. The results revealed that the BiOBr/ZnO/WO 3 ternary photocatalyst displayed more degradation activity in comparison to single-phase ZnO, WO 3 , or BiOBr, which is also higher than that of binary mixture photocatalysts with a phenol degradation efficiency of 90%. The influence of degradation variables, for instance, the potential of hydrogen (pH) and the initial organic contaminant content besides the heterojunction dose, on the deterioration efficiency was optimized using the response surface methodology. The degradation efficiency reached 95% under the optimal conditions of 0.08 g/0.03 L catalyst dose, a pH of 9, and an initial organic contaminant content of 10 mg L –1 . However, the optimal phenol degradation efficiency of 39.37 mg g –1 was achieved under the conditions of 0.08 g/0.03 L catalyst dose, pH of 9, and 200 mg L –1 initial phenol concentration.

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Section: Resultsmentioning

confidence: 99%

Section: Experimental Sectionmentioning

confidence: 99%

Ternary Photodegradable Nanocomposite (BiOBr/ZnO/WO₃) for the Degradation of Phenol Pollutants: Optimization and Experimental Design

Ali

Motawea

2021

ACS Omega

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“…A series of RSA-based nano-composites, RSA-TiO 2 (10,20,50, and 70 wt%), RSA-CuPc (1%) and RSA-TiO 2 (50)-CuPc was synthesized and characterized by different techniques. The results showed that titania in the RSA-TiO 2 system has interacted mainly with contained silica, whereas the shadow particles are SiO 2 and TiO 2 particles aggregate inside them, we can say Ti incorporated in silica which is clear from XRD average crystallite size 61, 18 nm for RSA-SiO 2 and TiO 2 respectively.…”

Section: Discussionmentioning

confidence: 99%

“…Challenges to address these problems involve doping, [6] nonmetallic elements doping, [7] surface modification [8] forming composites with narrow semiconductors, using semiconductor polymer as support [9] and coating with carbon layers to enhance the photocatalytic functionality of titanium dioxide. [10] Agricultural wastes have become of increasing concerns in recent years, as they may cause significant environmental problems; however, they may be exploited for several beneficial purposes, as feedstock for energy production, for chemical recovery and in chemical or dye adsorptions. Current literature is gaining attention to valorize the agriculture waste beside various capabilities of modifying the TiO 2 photo-catalysts.…”

Section: Introductionmentioning

confidence: 99%

Reforming of Rice Ash Waste by Incorporated Nanotitania in Silica Framework for Photo‐catalytic Treatment of Wastewater

El‐Salamony

Hassan

2020

Applied Organom Chemis

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The nano‐composites based on the burnt rice straw waste, reformed by nano‐TiO2 and copper phthalocyanine (CuPc), namely, RSA‐TiO2, RSA‐CuPc, and RSA‐TiO2‐CuPc were prepared by a mechano‐chemical method. The as‐prepared composite systems were characterized by adopting FE‐SEM, TEM, XRD, FTIR, SBET, and optical techniques. Their photo‐catalytic performance in the degradation of methylene blue dye was evaluated under visible light irradiation. The co‐existence of the two components in RSA, SiO2 and organic carbon, plus the inherently intimate contact between nano‐TiO2 and CuPc could improve the photo‐degradation of MB dye. The complete degradation of MB dye was achieved by using RSA‐TiO2 (50) nano‐composite and the time is taken for 50% degradation of a dye is 53 min under visible light radiation. The kinetic study revealed that photo‐degradation of MB follows a pseudo‐first‐order reaction mechanism, where the kinetic rate constant was 0.013 min−1.

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“…This is related to lowering the energy of the bandgap. The data was calculated from Tauc's equation [55]. Α = (hv -Eg) 1/2 / hν (α= absorption coefficient, A= sample absorbance, Eg= optical band gap, h= Planck's constant, ν = photon frequency.)…”

Section: Optical Propertiesmentioning

confidence: 99%

Photocatalytic Degradation of Congo Red Dye via Multi-Walled Carbon Nanotubes Modified CuO and ZnO Nanoparticles under Visible Light Irradiation

2020

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The photocatalytic degradation of congo red dye (CR) using nanocomposites materials of multi-walled carbon nanotubes combined with some transition metal oxide under visible light irradiation was studied. Multi-walled carbon nanotubes were prepared via chemical vapour synthesis (CVS) and loaded with some transition elements as Cu, Zn, and Cu0.1Zn0.9O nanoparticles, where the ratio of metal was kept constant in all catalysts (20% M). Various Characteristic techniques were adopted such as X-Ray Diffraction (XRD), Nitrogen adsorption-desorption, Transmission Electron Microscope (TEM), Fourier Transform Infra-Red (FT-IR), Ultra Violet reflectance analysis (UV), Scanning Electron Microscope (SEM), Energy dispersive X-ray Spectroscopy (EDX), Photoluminescence (PL) spectroscopy and Raman spectroscopy. The results proved that the mother carbon nanotubes have a high surface area and total pore volume and are found to be 247m 2 /g and 0.569 cm 3 /g, respectively, and its surface area decreased upon loading the metal nanoparticles. Pore size distribution curve (PSD) exhibited a wide mesopore centered at 30 nm. TEM results revealed that Cu and Zn metals are randomly distributed and located at the nanotube's surface and the tips of the tube via the tip-growth mechanism. It is seen that the Zn/CNTs have a homogenously uniform diameter as compared to the neat CNTs. The nanocomposites' photodegradation% rank was Zn/CNT > Cu/CNT > Cu-Zn/CNT, which related mainly to the chemical composition of Zn/CNT composite. Zn/CNT composite showed the highest degradation efficiency among the prepared composites, which achieved 97.7% after 70 minutes under visible light irradiation. The mechanism of the photocatalytic degradation of congo red dye under visible light irradiation was discussed.

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Visible light sensitive activated carbon-metal oxide (TiO₂, WO₃, NiO, and SnO) nano-catalysts for photo-degradation of methylene blue: a comparative study

Cited by 30 publications

References 44 publications

Ternary Photodegradable Nanocomposite (BiOBr/ZnO/WO₃) for the Degradation of Phenol Pollutants: Optimization and Experimental Design

Ternary Photodegradable Nanocomposite (BiOBr/ZnO/WO₃) for the Degradation of Phenol Pollutants: Optimization and Experimental Design

Reforming of Rice Ash Waste by Incorporated Nanotitania in Silica Framework for Photo‐catalytic Treatment of Wastewater

Photocatalytic Degradation of Congo Red Dye via Multi-Walled Carbon Nanotubes Modified CuO and ZnO Nanoparticles under Visible Light Irradiation

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Visible light sensitive activated carbon-metal oxide (TiO2, WO3, NiO, and SnO) nano-catalysts for photo-degradation of methylene blue: a comparative study

Cited by 30 publications

References 44 publications

Ternary Photodegradable Nanocomposite (BiOBr/ZnO/WO3) for the Degradation of Phenol Pollutants: Optimization and Experimental Design

Ternary Photodegradable Nanocomposite (BiOBr/ZnO/WO3) for the Degradation of Phenol Pollutants: Optimization and Experimental Design

Reforming of Rice Ash Waste by Incorporated Nanotitania in Silica Framework for Photo‐catalytic Treatment of Wastewater

Photocatalytic Degradation of Congo Red Dye via Multi-Walled Carbon Nanotubes Modified CuO and ZnO Nanoparticles under Visible Light Irradiation

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Visible light sensitive activated carbon-metal oxide (TiO₂, WO₃, NiO, and SnO) nano-catalysts for photo-degradation of methylene blue: a comparative study

Ternary Photodegradable Nanocomposite (BiOBr/ZnO/WO₃) for the Degradation of Phenol Pollutants: Optimization and Experimental Design

Ternary Photodegradable Nanocomposite (BiOBr/ZnO/WO₃) for the Degradation of Phenol Pollutants: Optimization and Experimental Design