Constructing a ZnO/CuCo2O4 p-n heterojunction photocatalyst for efficiently hexavalent chromium–phenol detoxification and nitrogen fixation

Almojil, Sattam Fahad; Ali, Masood Ashraf; Almohana, Abdulaziz Ibrahim; Alali, Abdulrhman Fahmi; Almoalimi, Khaled Twfiq; Althahban, Sultan; Sharma, Kamal; Ahmed, Ahmed Najat

doi:10.1016/j.jpcs.2022.111057

Cited by 22 publications

(5 citation statements)

References 82 publications

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“…The analysis showed that all curves give straight lines having a positive slope, which indicates that the thin films exhibit an n-type semiconductor. Several authors have confirmed that the ZnO is an n-type semiconductor [6,73,74]. According to the Mott-Schottky theory, Eq.…”

Section: Resultsmentioning

confidence: 97%

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Effect of deposition time on properties of the ZnO by USD Method

Madaoui,

Azibi,

Djabrouhou

et al. 2024

Rev. Mex. Fís.

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This investigation aims to improve the properties of 304 L stainless steel (SS) substrates for use in corrosion, mechanical, and biomedical applications by depositing ZnO thin films. The ultrasonic spraying technique was used to prepare ZnO thin films with depositional times of 1, 4, and 9 minutes. XRD and Raman studied the surface characteristics of ZnO samples. XRD analysis revealed a hexagonal structure with an average crystallite size of 22 nm for ZnO. Indentation nano measurements indicated an increase in the hardness of the films examined. To determine the type of conductivity and estimate the charge carrier density, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and Mott-Schottky analysis were performed. The thin film deposited for 9 minutes was found to be the most effective in improving corrosion resistance.

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Section: Resultsmentioning

confidence: 97%

“…Nano-sized transition metal-based oxides (like ZnO, SiO 2 , TiO 2 , CuO, etc) have attracted significant interest due to their capacity to enhance the chemical, physical and electrical properties [6]. Zinc is considered very abundant in bone tissue.…”

Section: Introductionmentioning

confidence: 99%

Effect of deposition time on properties of the ZnO by USD Method

Madaoui,

Azibi,

Djabrouhou

et al. 2024

Rev. Mex. Fís.

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“…5c shows, the E CB of complex 3 was confirmed to be −0.41 eV (−0.21 eV vs. NHE). 38,39 Therefore, the E CB of 3 could be estimated to be −0.31 eV. Based on the formula E VB = E g + E CB , 40 the corresponding E VB of 3 will occur at about 2.56 eV.…”

Section: Photocatalytic Performances Of 1-3mentioning

confidence: 99%

Three novel coordination polymers as bifunctional materials for the photocatalytic degradation of dyes and the oxygen evolution reaction in alkaline solutions

Dai

Liu

et al. 2023

CrystEngComm

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“…The exploration of various semiconductors has significantly contributed to advancing knowledge in the chemical industries, artificial ion batteries, optoelectronics, and photocatalysts. Notably, ZnO-WO 3 , CuO/WO 3 /TiO 2 , ZnO-TiO 2 , ZnO/CeO 2 , ZnO/CuCo 2 O 4 , ZnO/BiVO 4 , and ZnO-In 2 O 3 have emerged as effective photocatalysts for numerous transformations under common light irradiation sources. ,− We believe that the development of a ZnO-ZnS heterostructure could enhance electronic transitions within a broad energy range, thus establishing it as a novel and efficient photocatalyst. Herein, ZnO-ZnS is prepared via a simple hydrothermal-based chemical sol–gel method that requires no special requirement.…”

Section: Introductionmentioning

confidence: 99%

ZnO-ZnS Heterostructure as a Potent Photocatalyst in the Preparation of Some Substituted Chromenes and Remarkable Antigastrointestinal Cancer Activity

Liu,

Wang,

Sun

et al. 2023

ACS Omega

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The nanosized hybrid material ZnO-ZnS was synthesized using the well-known sol−gel method, as a simple and environmentally friendly procedure. The material was then characterized using various techniques including FESEM, TEM, UV−vis, DRS, EDS, XRD, and FT-IR. The characterization studies revealed the generation of ZnO-ZnS nanoparticles with a mean size of around 25 nm. Moreover, DRS analysis provided a band gap of 3.05 eV for this nanomaterial. The photocatalytic properties of the ZnO-ZnS heterojunction was investigated in the synthesis of some substituted chromenes under mild reaction conditions. The results showed that the prepared nanophotocatalyst exhibits significantly higher activity compared to its individual components (ZnO and ZnS) and provides 73−87% yield with 0.01 g of ZnO-ZnS after 30 min. In addition, the nanophotocatalyst demonstrated a high reusability in the desired condensation reaction. The enhanced photocatalytic activity of ZnO-ZnS can be attributed to the slower recombination of the electron−hole pairs in this semiconductor material. The reactive species OH • , • O 2 − , and h + are believed to play important roles in the photocatalytic system. Furthermore, cellular toxicity of ZnO-ZnS nanoparticles was evaluated on HCT-116 human gastrointestinal cancer cell line by MTT assay. The results proved a distinct reduction of cell viability, proofing cytotoxicity of nanoparticles on the cancer cells. This study highlights the potential of the nanoparticles against gastrointestinal cancer.

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Constructing a ZnO/CuCo2O4 p-n heterojunction photocatalyst for efficiently hexavalent chromium–phenol detoxification and nitrogen fixation

Cited by 22 publications

References 82 publications

Effect of deposition time on properties of the ZnO by USD Method

Effect of deposition time on properties of the ZnO by USD Method

Three novel coordination polymers as bifunctional materials for the photocatalytic degradation of dyes and the oxygen evolution reaction in alkaline solutions

ZnO-ZnS Heterostructure as a Potent Photocatalyst in the Preparation of Some Substituted Chromenes and Remarkable Antigastrointestinal Cancer Activity

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