In-situ growth of ZnO globular on g-C3N4 to fabrication binary heterojunctions and their photocatalytic degradation activity on tetracyclines

Hu, Jingyu; Yang, Ran; Li, Zhaohui; Sun, Yuanqiang; Qu, Lingbo; Kani, Alexander Nti

doi:10.1016/j.solidstatesciences.2019.02.009

Cited by 39 publications

(22 citation statements)

References 56 publications

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“…The intense peak of 27.8° is related to the interlayer C–N stacking of the conjugated aromatic system and the weak peak of 13.01° corresponds to the periodic arrangement of the s-triazine units. The observed results are consistent with the reported literature. , …”

Section: Resultssupporting

confidence: 94%

“…As shown in Figure 3c, the high-resolution XPS N 1s spectrum of g-C 3 N 4 was fitted by the three peaks of 403.9, 399.7, and 398.1 eV, which can be ascribed to the sp 2 N (C�N−C) involved in the triazine ring, tertiary nitrogen atom (NC 3 ), or secondary nitrogen atom (HNC 2 ), and the charging effects or positive charge localized in the heterocycles, respectively. 54 Moreover, the position and relative intensity of the peaks in the high-resolution C 1s and N 1s XPS spectra of the ZnO/g-C 3 N 4 composite were changed, 51,53 as shown in Figure 3b,c. Furthermore, the high-resolution O 1s XPS spectra of g-C 3 N 4 showed one peak at 532.2 eV, which is assigned to the surface −OH groups on the g-C 3 N 4 or in the adsorbed H 2 O.…”

Section: ■ Materials and Methodsmentioning

confidence: 97%

“…The results proved to be in good match with the reported ZnO binding energy values in the ZnO/g-C 3 N 4 composite. 55 In addition, the structure of the Zn LMM Auger peaks in the survey spectrum of ZnO/g-C 3 N 4 composite revealed the presence of Zn−N bonds 51 (Figure 3a). Thus, the XPS analysis further confirmed the existence of ZnO in the composite.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

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One-Step Fabrication of the ZnO/g-C₃N₄ Composite for Visible Light-Responsive Photocatalytic Degradation of Bisphenol E in Aqueous Solution

et al. 2023

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The ZnO/g-C3N4 composite was successfully synthesized by a simple one-step calcination of a urea and zinc acetate mixture. The photocatalytic activity of the synthesized composite was evaluated in the degradation of bisphenol E (BPE). The morphology, crystallinity, optical properties, and composition of the synthesized composite were characterized by using various analytical techniques such as scanning electron microscopy (SEM), transmitted electron microscopy (TEM), field emission-electron probe microanalysis (FE-EPMA), nitrogen adsorption and desorption isotherm measurement, Fourier-transform infrared (FTIR) spectroscopy, X-ray powder diffraction (XRD), diffuse reflectance spectroscopy (DRS), photoluminescence (PL) spectroscopy, electrochemical impedance spectroscopy (EIS), X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA). The degradation rate of BPE with the ZnO/g-C3N4 composite was 8 times larger than that obtained with pure g-C3N4 at the optimal conditions. The excellent photocatalytic activity was attributed to the synergistic effect between the g-C3N4 and ZnO, which enhanced the efficiency of charge separations, reduced the e–/h+ pairs recombination, and increased the visible light absorption ability. The radical scavenger studies indicated that the •O2 – and h+ species were mainly responsible for the degradation of BPE. The stability test suggested the chemical and photostability of the synthesized composite. Two possible photocatalytical mechanisms have been suggested.

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Section: Resultssupporting

confidence: 94%

Section: ■ Materials and Methodsmentioning

confidence: 97%

Section: ■ Materials and Methodsmentioning

confidence: 99%

See 1 more Smart Citation

One-Step Fabrication of the ZnO/g-C₃N₄ Composite for Visible Light-Responsive Photocatalytic Degradation of Bisphenol E in Aqueous Solution

et al. 2023

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“…TOC analysis was conducted in selected conditions (pH: 4.4, ZnAl 2 O 4 dose 1 g/L, irradiation time 4 h, TC concentration 20 ppm) to study the TC mineralization. The experimental results indicate a slight decrease in TOC values from 11.67 to 8.54 mg/L after 4 h of solar irradiation, and the mineralization rate reached 26% 1, we can affirm that ZnAl 2 O 4 gave good results and a better degradation rate, with high performance for the treatment of water contaminated with TC [40][41][42][43][44].…”

Section: Effect Of the Tetracycline Concentrationsupporting

confidence: 56%

Kinetic and mechanism studies of tetracycline photodegradation using synthesized ZnAl2O4

Hemmi

Belmedani

Mekatel

et al. 2021

Reac Kinet Mech Cat

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In this study, we report the photodegradation of a pharmaceutical pollutant namely the tetracycline (TC) onto the spinel ZnAl 2 O 4 . The semiconductor ZnAl 2 O 4 was synthesized by chemical route and characterized by X-ray diffraction, scanning electron microscopy and optical analysis. The capacitance potential (C −2 -E) measurements showed that the oxide exhibit n-type conduction, supported by a negative thermopower. The degradation of TC was performed by combined adsorption/photocatalysis processes. The result showed that 30 min of contact time was sufficient to reach 42% of the adsorption capacity; the photodegradation rate of TC was evaluated on ZnAl 2 O 4 under optimal operating parameters pH ~ 4.4, catalyst dose (1 g/L), and initial TC concentration (20 mg/L). The kinetic shows that the TC disappears almost completely (92%) and follows a second order model with a half photocatalytic lifetime of 21 min for a TC concentration of 20 mg/L. The mechanism of the antibiotic tetracycline photodegradation on ZnAl 2 O 4 indicated that the O ⋅− 2 radicals and the holes are mainly responsible for the oxidation of TC. The process can be qualified as clean remediation and is a part of a sustainable development perspective.

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“…For example, TiO 2 [16], g-C 3 N 4 [17], ZnS [18], and BiVO 4 [19] have been used to achieve the removal of TC from aqueous solution. The use of binary composites such as ZnO/g-C 3 N 4 [20], FeNi 3 @SiO 2 [21], Sr-Bi 2 O 3 [22], SnO/CeO 2 [23], and ZnO/γ-Fe 2 O 3 [24] or ternary composites including MGO-Ce-TiO 2 [25], CeO 2 / Bi 2 O 2 CO 3 [26], Ag/Ag 2 CO 3 /BiVO 4 [27], and IO-TiO 2 -CdS [28] have also been reported. However, due to some demerits associated with some of these materials such as high cost, economical nonviability, and poor efficiency, there is a need to explore other semiconductors.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Tetracycline in Aqueous Solution Using Copper Sulfide Nanoparticles

et al. 2021

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In this paper, spherical-shaped pure phase djurleite (Cu31S16) and roxbyite (Cu7S4) nanoparticles were prepared by a solvothermal decomposition of copper(II) dithiocarbamate complex in dodecanthiol (DDT). The reaction temperature was used to control the phases of the samples, which were represented as Cu31S16 (120 °C), Cu31S16 (150 °C), Cu7S4 (220 °C), and Cu7S4 (250 °C) and were characterized by using X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM and TEM), and absorption spectroscopy. The samples were used as photocatalysts for the degradation of tetracycline (TC) under visible light irradiation. The results of the study showed that Cu7S4 (250 °C) exhibited the best activity in the reaction system with the TC degradation rate of up to 99% within 120 min of light exposure, while the Cu31S16 (120 °C) system was only 46.5% at the same reaction condition. In general, roxbyite Cu7S4 (250 °C) could be considered as a potential catalyst for the degradation of TC in solution.

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In-situ growth of ZnO globular on g-C3N4 to fabrication binary heterojunctions and their photocatalytic degradation activity on tetracyclines

Cited by 39 publications

References 56 publications

One-Step Fabrication of the ZnO/g-C₃N₄ Composite for Visible Light-Responsive Photocatalytic Degradation of Bisphenol E in Aqueous Solution

One-Step Fabrication of the ZnO/g-C₃N₄ Composite for Visible Light-Responsive Photocatalytic Degradation of Bisphenol E in Aqueous Solution

Kinetic and mechanism studies of tetracycline photodegradation using synthesized ZnAl2O4

Photocatalytic Degradation of Tetracycline in Aqueous Solution Using Copper Sulfide Nanoparticles

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In-situ growth of ZnO globular on g-C3N4 to fabrication binary heterojunctions and their photocatalytic degradation activity on tetracyclines

Cited by 39 publications

References 56 publications

One-Step Fabrication of the ZnO/g-C3N4 Composite for Visible Light-Responsive Photocatalytic Degradation of Bisphenol E in Aqueous Solution

One-Step Fabrication of the ZnO/g-C3N4 Composite for Visible Light-Responsive Photocatalytic Degradation of Bisphenol E in Aqueous Solution

Kinetic and mechanism studies of tetracycline photodegradation using synthesized ZnAl2O4

Photocatalytic Degradation of Tetracycline in Aqueous Solution Using Copper Sulfide Nanoparticles

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Product

Resources

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One-Step Fabrication of the ZnO/g-C₃N₄ Composite for Visible Light-Responsive Photocatalytic Degradation of Bisphenol E in Aqueous Solution

One-Step Fabrication of the ZnO/g-C₃N₄ Composite for Visible Light-Responsive Photocatalytic Degradation of Bisphenol E in Aqueous Solution