Design and synthesis of g-C3N4/(Cu/TiO2) nanocomposite for the visible light photocatalytic degradation of endosulfan in aqueous solutions

Nekooie, Reyhaneh; Ghasemi, Jahan B.; Badiei, Alireza; Shamspur, Tayebeh; Mostafavi, Ali; Moradian, Sahar

doi:10.1016/j.molstruc.2022.132650

Cited by 22 publications

(2 citation statements)

References 55 publications

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“…Cu nanoparticles can be more intuitively observed in Figure 2b, which is similar to the size of Cu nanoparticles in CN–Cu (3–5 nm), which proves that the second calcination step does not lead to Cu agglomeration. [ 25 ] In Figure 2c,d, the crystal plane spacing (0.64 nm) of (002) plane and lattice fringe (0.27 nm) in the (100) plane of MoS 2 were clearly observed. [ 26,27 ] In order to observe the distribution of Cu and MoS 2 in CN–Cu–MS, elemental mapping and energy dispersion spectrum (EDS) analysis were performed, as shown in Figure S1 (see Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Efficient Charge Transfer in Z‐Scheme g‐C₃N₄/Cu/MoS₂ Heterojunctions for Enhanced Photocatalysis and Photoenhanced Electrocatalysis

Zhu

Wang

Luan

et al. 2022

Adv Materials Inter

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properties make its structure diverse and shapeable. [6] However, the application of bulk CN in photocatalysis is still limited due to its low conductivity, high recombination rate of carriers and holes and small specific surface area. [7,8] Various modification methods such as element doping, morphology control, and heterogeneous structure design have been tried to enhance the charge transfer kinetics and inhibit the recombination of carriers, so as to improve the optical and electrochemical capabilities. [9,10] Doping metal elements (such as Au, Pt, Cu) in CN is a simple and effective modification strategy, which can greatly improve the conductivity of CN and promote charge transfer. [11][12][13][14] Li et al. doped Pt ions into CN, changing the charge transport path and making CN have infrared absorption. [15] It is worth mentioning that due to the surface plasmon resonance effect of Au, Pt, Cu, and other metals, it can be used as an electronic conductor to participate in the construction of Z-scheme heterojunction. [16][17][18] In the application of photocatalytic hydrogen production, CN must rely on precious metals such as Pt as cocatalyst to play a role, but this requires high cost. It was found that transition metal dichalcogenides such as MoS 2 , CoP, and Ni 2 P were considered as cheap substitutes for noble metal catalysts because Gibbs free energy was close to Pt. [19][20][21] Moreover, when it forms a heterojunction with CN, the charge transfer rate is able to accelerate through the coupling force between the interfaces, so as to avoid its recombination with holes. Such as Luo et al. prepared CoP/CN composite, CoP as cocatalyst, the hydrogen production rate under visible light irradiation reached 1.074 mmol h −1 g −1 . [22] In this paper, CN/Cu/MoS 2 (CN-CU-MS) Z-scheme heterojunctions were successfully constructed. As an electronic conductor, Cu changed the original II-type transmission path between CN and MoS 2 into Z-scheme transfer, which greatly increased the charge transfer rate and more effectively inhibits the recombination of charges. The existence and interaction of Cu and MoS 2 were verified by morphology and structure characterization. Through the photocatalytic hydrogen production test of the samples, it was found that the hydrogen production rate of CN-CU-MS was 2.63 times that of CN/MoS 2 (CN-MS), which was also much higher than that of CN/MoS 2 /Cu(CN-MS-Cu).Efficient charge separation and transfer is always an important prerequisite for efficient photocatalysis. Herein, g-C 3 N 4 /Cu/MoS 2 Z-scheme heterojunctions are successfully constructed by a two-step calcination method, in which Cu nanoparticles are embedded as an electronic conductor between g-C 3 N 4 and MoS 2 . g-C 3 N 4 /Cu/MoS 2 composites reveal excellent photocatalytic activity. The rate of hydrogen production reaches to 970.5 µmol g −1 h −1 , which is 22 and 2.63 times of that of g-C 3 N 4 and g-C 3 N 4 /MoS 2 , respectively. Meanwhile, due to the significant enhancement of the conductivity of g-C 3 N 4 /Cu/MoS 2 and the ...

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Section: Resultsmentioning

confidence: 99%

Efficient Charge Transfer in Z‐Scheme g‐C₃N₄/Cu/MoS₂ Heterojunctions for Enhanced Photocatalysis and Photoenhanced Electrocatalysis

Zhu

Wang

Luan

et al. 2022

Adv Materials Inter

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“…Another important strategy to improve the photocatalytic efficiency of g-C 3 N 4 is the formation of g-C 3 N 4 -based binary and ternary heterostructure composites, including doping/loading with noble metals and creating heterojunctions with other organic and inorganic semiconductors [ 15 , 28 ]. Recently, for example, various heterostructure composites, such as Ag/g-C 3 N 4 [ 29 , 30 , 31 ], Au/g-C 3 N 4 [ 31 , 32 , 33 ], graphene oxide/g-C 3 N 4 [ 34 , 35 , 36 , 37 ], TiO 2 /g-C 3 N 4 [ 38 , 39 , 40 , 41 , 42 ], Ag/TiO 2 /g-C 3 N 4 [ 43 , 44 , 45 ], TiO 2 /Cu/g-C 3 N 4 [ 46 ], TiO 2 /ZrO 2 /g-C 3 N 4 [ 47 ], and Bi 2 WO 6 /g-C 3 N 4 /TiO 2 [ 48 ] have been successfully prepared, to optimize the optical properties of g-C 3 N 4 and significantly improve its overall photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Emerging and Promising Multifunctional Nanomaterial for Textile Application Based on Graphitic Carbon Nitride Heterostructure Nanocomposites

et al. 2023

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Nanocomposites constructed with heterostructures of graphitic carbon nitride (g-C3N4), silver (Ag), and titanium dioxide (TiO2) have emerged as promising nanomaterials for various environmental, energy, and clinical applications. In the field of textiles, Ag and TiO2 are already recognized as essential nanomaterials for the chemical surface and bulk modification of various textile materials, but the application of composites with g-C3N4 as a green and visible-light-active photocatalyst has not yet been fully established. This review provides an overview of the construction of Ag/g-C3N4, TiO2/g-C3N4, and Ag/TiO2/g-C3N4 heterostructures; the mechanisms of their photocatalytic activity; and the application of photocatalytic textile platforms in the photochemical activation of organic synthesis, energy generation, and the removal of various organic pollutants from water. Future prospects for the functionalization of textiles using g-C3N4-containing heterostructures with Ag and TiO2 are highlighted.

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Harnessing Light and CO₂ With Copper‐Nickel on TiO₂ Photocatalysts for Methanol Production

Mutiara,

Saputera,

Utomo

et al. 2024

ChemCatChem

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The contemporary focus on global concerns such as carbon dioxide (CO2) emissions impacting the environment and contributing to the energy crisis has prompted exploration into alternatives, with photocatalysis emerging as a potential solution. This research involved the development of a pure TiO2 (PT) photocatalyst, synthesized through the hydrothermal method and enhanced with double co‐catalysts of copper and nickel via the wet impregnation technique. The characteristics of the resulting photocatalysts were comprehensively examined using various techniques, including XRD, Raman, UV‐Vis DRS, surface area and pore analysis, SEM‐EDX, HRTEM, XPS, PL, and EPR. The characterization outcomes revealed that the PT phase comprised anatase, brookite, and rutile. In the activity test, CNT‐4 (Cu‐Ni/TiO2‐400) exhibited the highest methanol yield at 772.41 μmole g‐1 h‐1, followed by CONTT‐4 (CuO‐NiTiO3/TiO2‐400) with 750.38 μmole g‐1 h‐1 after three hours of irradiation using a 300 W xenon lamp, while methanol in PT formed only after three hours of irradiation. The presence of cocatalysts significantly influenced methanol yield, attributed to the increased active sites for the reaction and the reduced band gap, impacting light absorption optimization and suppressing electron‐hole recombination. In CNT‐4, the formation of Ti3+ associated with oxygen vacancies facilitated the generation of more products.

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Design and synthesis of g-C3N4/(Cu/TiO2) nanocomposite for the visible light photocatalytic degradation of endosulfan in aqueous solutions

Cited by 22 publications

References 55 publications

Efficient Charge Transfer in Z‐Scheme g‐C₃N₄/Cu/MoS₂ Heterojunctions for Enhanced Photocatalysis and Photoenhanced Electrocatalysis

Efficient Charge Transfer in Z‐Scheme g‐C₃N₄/Cu/MoS₂ Heterojunctions for Enhanced Photocatalysis and Photoenhanced Electrocatalysis

Emerging and Promising Multifunctional Nanomaterial for Textile Application Based on Graphitic Carbon Nitride Heterostructure Nanocomposites

Harnessing Light and CO₂ With Copper‐Nickel on TiO₂ Photocatalysts for Methanol Production

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Design and synthesis of g-C3N4/(Cu/TiO2) nanocomposite for the visible light photocatalytic degradation of endosulfan in aqueous solutions

Cited by 22 publications

References 55 publications

Efficient Charge Transfer in Z‐Scheme g‐C3N4/Cu/MoS2 Heterojunctions for Enhanced Photocatalysis and Photoenhanced Electrocatalysis

Efficient Charge Transfer in Z‐Scheme g‐C3N4/Cu/MoS2 Heterojunctions for Enhanced Photocatalysis and Photoenhanced Electrocatalysis

Emerging and Promising Multifunctional Nanomaterial for Textile Application Based on Graphitic Carbon Nitride Heterostructure Nanocomposites

Harnessing Light and CO2 With Copper‐Nickel on TiO2 Photocatalysts for Methanol Production

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Efficient Charge Transfer in Z‐Scheme g‐C₃N₄/Cu/MoS₂ Heterojunctions for Enhanced Photocatalysis and Photoenhanced Electrocatalysis

Efficient Charge Transfer in Z‐Scheme g‐C₃N₄/Cu/MoS₂ Heterojunctions for Enhanced Photocatalysis and Photoenhanced Electrocatalysis

Harnessing Light and CO₂ With Copper‐Nickel on TiO₂ Photocatalysts for Methanol Production