A facile synthesis of g-C3N4/BaTiO3 photocatalyst with enhanced activity for degradation of methylene blue under visible light

Nguyen, Van Kim; Thi, Viet Nga Nguyen; Tran, Huu Ha; Thi, Thu Phuong Tran; Truong, Thanh Tam; Vo, Vien

doi:10.1007/s12034-020-02277-2

Cited by 28 publications

(5 citation statements)

References 45 publications

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“…The results show that all three kinds of trapping agents exerted influence on the photocatalytic process. It can be seen that, following the addition of IA, the photocatalytic efficiency became greatly reduced, indicating that the degradation of MB was mainly due to • OH − , followed by h + and • O 2 − , a finding which is consistent with the previous results [ 47 , 48 ].…”

Section: Resultssupporting

confidence: 91%

Enhanced Photocatalytic Activity of V2C MXene-Coupled ZnO Porous Nanosheets with Increased Surface Area and Effective Charge Transfer

Zhou,

Sun,

et al. 2024

Materials

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Photocatalysis performs excellently when degrading organic pollutants, but the photocatalytic degradation rate is not high for most photocatalysts due to their narrow sunlight adsorption range and high recombination rate of electron hole pairs. Herein, we use V2C-MXene with a wide sunlight adsorption range to couple ZnO porous nanosheets and form ZnO/MXene hybrids using a facile electrostatic self-assembly method. The ZnO/MXene hybrids acquired demonstrated improved photochemical efficiency in breaking down methylene blue (MB) when contrasted with porous ZnO nanosheets. The degradation rate of MB reached 99.8% under UV irradiation for 120 min after the ZnO/MXene hybrid formation, while 38.6% was attained by the ZnO porous nanosheets. Moreover, photodegradation rate constants (k) were calculated as 3.05 × 10−3 and 5.42 × 10−2 min−1 for ZnO porous nanosheets and ZnO/MXene hybrids, respectively, indicating that the photodegradation performance was enhanced by 17.8 times after the modification of V2C. This was probably because the modification of V2C can increase the specific surface area to provide more sites for MB adsorption, widen the sunlight adsorption range to produce good photothermal effect, and facilitate the transfer of photogenerated carriers in ZnO to promote the reaction of more photogenerated carriers with MB. Hence, this work offers a simple approach to creating effective photocatalysts for breaking down organic contaminants.

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Section: Resultssupporting

confidence: 91%

Enhanced Photocatalytic Activity of V2C MXene-Coupled ZnO Porous Nanosheets with Increased Surface Area and Effective Charge Transfer

Zhou,

Sun,

et al. 2024

Materials

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“…Figure 3A shows the C 1s spectra of pCN and D149/pCN. The peaks at 284.40 eV and 287.91 eV are C-C and N-C=N bonds, respectively [54]. In addition, there are three main peaks in N 1s spectra (Figure 3B).…”

Section: Regular Characterizationmentioning

confidence: 96%

g-C3N4 Sensitized by an Indoline Dye for Photocatalytic H2 Evolution

Chen

Liu

2021

Processes

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Protonated g-C3N4 (pCN) formed by treating bulk g-C3N4 with an aqueous HCl solution was modified with D149 dye, i.e., 5-[[4[4-(2,2-diphenylethenyl) phenyl]-1,2,3,3a,4,8b-hexahydrocyclopent[b]indol-7-yl] methylene]-2-(3-ethyl-4-oxo-2-thioxo-5-thiazolidinylidene)-4-oxo-thiazolidin-2-ylidenerhodanine, for photocatalytic water splitting (using Pt as a co-catalyst). The D149/pCN-Pt composite showed a much higher rate (2138.2 µmol·h−1·g−1) of H2 production than pCN-Pt (657.0 µmol·h−1·g−1). Through relevant characterization, the significantly high activity of D149/pCN-Pt was linked to improved absorption of visible light, accelerated electron transfer, and more efficient separation of charge carriers. The presence of both D149 and Pt was found to be important for these factors. A mechanism was proposed.

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“…ZnO và BaTiO3 được đánh giá là những vật liệu xúc tác quang đầy tiềm năng. Tuy nhiên, bên cạnh việc sở hữu những ưu điểm nổi bật, chúng là những vật liệu có năng lượng vùng cấm tương đối rộng (3,25 eV đối với ZnO [11] và 3,2 eV đối với BaTiO3 [12], phổ hấ p t hụ ánh sáng chủ yếu nằm ở vùng tử ngoại, có sự tái tổ hợp nhanh cặp electron -lỗ trống quang sinh trong quá trình quang xúc tác. Điều này làm hạn chế khả năng ứng dụng chúng vào thực tiễn ở dạng tinh khiết.…”

Section: Giới Thiệu Chungunclassified

Synthesis ZnO/BaTiO3 heterostructured photocatalyst with improved efficiency in MB degradation under sunlight

Thi¹,

Viet²,

Thuy³

et al. 2022

Vietnam j. catal. adsorp.

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Heterostructured ZnO/BaTiO3 composites were successfully prepared with varying contents of BaTiO3 via a mixed solvent-thermal method. The samples are denoted as ZBTO-x:y, where x:y is weight ratio of ZnO và BaTiO3 (x:y=1:2, 1:3 và 1:5) in the reaction mixtures. The obtained materials were characterized by X-Ray diffraction (XRD), infrared spectra (IR), energy-dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM). The photocatalytic activity of ZBTO-x:y samples was assessed by degradation of methylene blue in aqueous solution under sunlight. Among them, ZBTO-1:3 displayed the best photocatalytic activity. The enhancement in photocatalytic activity for the ZBTO-1:3 was observed, which can be attributed to the presence of BaTiO3 in the materials.

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A facile synthesis of g-C3N4/BaTiO3 photocatalyst with enhanced activity for degradation of methylene blue under visible light

Cited by 28 publications

References 45 publications

Enhanced Photocatalytic Activity of V2C MXene-Coupled ZnO Porous Nanosheets with Increased Surface Area and Effective Charge Transfer

Enhanced Photocatalytic Activity of V2C MXene-Coupled ZnO Porous Nanosheets with Increased Surface Area and Effective Charge Transfer

g-C3N4 Sensitized by an Indoline Dye for Photocatalytic H2 Evolution

Synthesis ZnO/BaTiO3 heterostructured photocatalyst with improved efficiency in MB degradation under sunlight

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