Facile fabrication metal Cu-decorated g-C3N4 photocatalyst with Schottky barrier for efficient pollutant elimination

Liu, Kening; Wang, Xue; Li, Chang; Gao, Mingming; Cao, Naiwen; Zhao, Xinyu; Li, Weixia; Ding, Xuejiao; Li, Zhiyong; Du, Xindong; Feng, Jing; Ren, Yueming; Wei, Tong; Zhang, Mingyi

doi:10.1016/j.diamond.2022.109116

Cited by 9 publications

(3 citation statements)

References 70 publications

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“…Directly from the graph, one can determine the type of conductivity of the analyzed sample. In our case, the linear part of the graph has a positive slope, which indicates the hole conductivity of carbon nitride and is consistent with literature data [31][32][33][34].…”

Section: Effect Of External Potential On the Impedance Spectroscopy R...supporting

confidence: 92%

Studying effects of external conditions of electrochemical measurements on the photoelectrochemical properties of semiconductors: cyclic voltammetry, impedance spectroscopy, and Mott – Schottky method

Markovskaya

Sidorenko

Zhurenok

et al. 2023

EM&T

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In this paper, the dependences of the semiconductors’ photoelectrochemical properties on the experimental conditions were studied for the solid solution of CdS and ZnS, graphitic carbon nitride, and the platinized carbon nitride. The cyclic voltammograms were obtained under different scan rates. The sample investigations were carried out by two ways, at the constant external voltage and varied amplitudes and at different external voltages and the fixed amplitude. The Mott – Schottky dependences were studied at different frequencies. The basic dependences of the changes in the photoelectrode target characteristics on the experimental condition were found. Some recommendations for the correct comparison of qualitative and quantitative photoelectrochemical data were formulated.

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Section: Effect Of External Potential On the Impedance Spectroscopy R...supporting

confidence: 92%

Studying effects of external conditions of electrochemical measurements on the photoelectrochemical properties of semiconductors: cyclic voltammetry, impedance spectroscopy, and Mott – Schottky method

Markovskaya

Sidorenko

Zhurenok

et al. 2023

EM&T

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“…The copper species on the surface of the g-C 3 N 4 function as the conduction-band-electron, trapping and transmitting sites for the appropriate electron acceptor in the solution phase. In the presence of Cu NPs, a Schottky barrier is formed at the interface of the Cu NPs and g-C 3 N 4 , in which photogenerated electrons (e CB − ) are transferred to the Cu NPs (Equation ( 3)) [46].…”

Section: Effect Of Copper Modification and The Presence Of H2o2mentioning

confidence: 99%

Effect of Copper-Modification of g-C3N4 on the Visible-Light-Driven Photocatalytic Oxidation of Nitrophenols

Nguyen Xuan,

Nguyen Thi,

Tran Thuong

et al. 2023

Molecules

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Graphitic carbon nitride (g-C3N4) has proved to be a promising heterogeneous photocatalyst in the visible range. It can be used, among others, for the oxidative conversion of environmentally harmful nitrophenols occurring in wastewater. However, its photocatalytic activity needs to be enhanced, which can be achieved by modification with various dopants. In our work, copper-modified g-C3N4 was prepared by ultrasonic impregnation of the pristine g-C3N4 synthesized from thiourea. The morphology, microstructure, and optical properties of the photocatalysts were characterized by XRD, FT-IR, DRS, SEM, XPS, and TEM. DRS analysis indicated a slight change in both the CB and the VB energies of Cu/g-C3N4 compared to those of g-C3N4. The efficiency of the photocatalysts prepared was tested by the degradation of nitrophenols. Copper modification caused a sevenfold increase in the rate of 4-nitrophenol degradation in the presence of H2O2 at pH = 3. This dramatic enhancement can be attributed to the synergistic effect of copper and H2O2 in this photocatalytic system. A minor Fenton reaction role was also detected. The reusability of the Cu/g-C3N4 catalyst was demonstrated through five cycles. Copper-modified g-C3N4 with H2O2 proved to be applicable for efficient visible-light-driven photocatalytic oxidative degradation of nitrophenols.

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“…presently lost their importance as these techniques simply convert the noxious compounds from one phase to another, rather than complete elimination. [5][6][7] Hence, for present concerns in particular for detoxification of contaminated water, there is urgent requirement of a decidedly competent, precise, CeO 2 ), [26,27] Z-scheme (InVO 4 /β-AgVO 3 , g-C 3 N 4 -TiO 2 ), [28,29] and Sscheme (TiO 2 /CdS, ZnO/g-C 3 N 4 ), [30,31] etc. showed enhanced photocatalytic activities.…”

Section: Introductionmentioning

confidence: 99%

Pt Nanoparticles Embedded Polypyrrole‐Carbon Black/SrSnO₃ Photocatalyst with Stable and Superior Photodegradation Performance

Faisal,

Ahmed,

Algethami

et al. 2024

ChemistrySelect

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Currently, the primary focus for scientific authorities and regulatory departments revolves around water pollution. In this regard, photocatalysis has emerged as a highly effective, affordable, and goal‐oriented approach. Thus, recognizing the urgency of this issue, we focused our efforts towards developing a novel ternary photocatalytic structure based on mesoporous SrSnO3, combined with polypyrrole‐doped carbon black (PPC) and platinum nanoparticles (Pt NPs). Pt NPs, PPC and SrSnO3‐based nanocomposite photocatalyst was developed through a very simple chemical method followed by ultrasonication and photoreduction techniques. XRD analysis confirmed orthorhombic phase of SrSnO3, while the formation of the ternary nanocomposite among Pt NPs, PPC and SrSnO3 has been confirmed by X‐ray photoelectron spectroscopy (XPS) and Fourier Transform Infrared (FTIR) spectroscopy. Transmission electron microscopy (TEM) revealed the presence of Pt NPs (5–15 nm), beads/dense cocoon like structures of PPC along with rod, spherical and needle shape nanostructures of SrSnO3 in newly created ternary photocatalyst. Diffuse reflectance spectroscopy (DRS) showed lowering of band gap energy in case of Pt@PPC/SrSnO3. Newly developed Pt@PPC/SrSnO3 nanocomposite worked efficiently when employed on colorless insecticide imidacloprid (IMD) and on colored methylene blue (MB) dye under UV‐light. Pt@PPC/SrSnO3 photocatalyst exhibited excellent performance with 96.03 % removal of pollutant IMD in only 20 min, almost 296 % more efficient than bare SrSnO3. Furthermore, the Pt@PPC/SrSnO3 ternary photocatalyst showed rapid removal of MB with almost total elimination of dye molecule in just 16 min.

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Facile fabrication metal Cu-decorated g-C3N4 photocatalyst with Schottky barrier for efficient pollutant elimination

Cited by 9 publications

References 70 publications

Studying effects of external conditions of electrochemical measurements on the photoelectrochemical properties of semiconductors: cyclic voltammetry, impedance spectroscopy, and Mott – Schottky method

Studying effects of external conditions of electrochemical measurements on the photoelectrochemical properties of semiconductors: cyclic voltammetry, impedance spectroscopy, and Mott – Schottky method

Effect of Copper-Modification of g-C3N4 on the Visible-Light-Driven Photocatalytic Oxidation of Nitrophenols

Pt Nanoparticles Embedded Polypyrrole‐Carbon Black/SrSnO₃ Photocatalyst with Stable and Superior Photodegradation Performance

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Facile fabrication metal Cu-decorated g-C3N4 photocatalyst with Schottky barrier for efficient pollutant elimination

Cited by 9 publications

References 70 publications

Studying effects of external conditions of electrochemical measurements on the photoelectrochemical properties of semiconductors: cyclic voltammetry, impedance spectroscopy, and Mott – Schottky method

Studying effects of external conditions of electrochemical measurements on the photoelectrochemical properties of semiconductors: cyclic voltammetry, impedance spectroscopy, and Mott – Schottky method

Effect of Copper-Modification of g-C3N4 on the Visible-Light-Driven Photocatalytic Oxidation of Nitrophenols

Pt Nanoparticles Embedded Polypyrrole‐Carbon Black/SrSnO3 Photocatalyst with Stable and Superior Photodegradation Performance

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Pt Nanoparticles Embedded Polypyrrole‐Carbon Black/SrSnO₃ Photocatalyst with Stable and Superior Photodegradation Performance