Gear-shaped mesoporous NH2-MIL-53(Al)/CdS P-N heterojunctions as efficient visible-light-driven photocatalysts

Zhao, Hongbo; Xing, Zipeng; Su, Siyi; Song, Shengyuan; Li, Zhenzi; Zhou, Wei

doi:10.1016/j.apcatb.2021.120106

Cited by 69 publications

(29 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Evidently, in Figure 5a-b, the bandgap of Cu 2 O is 2.16 eV and the Cu 2 O/CeO 2 -2 exhibits narrower E g (2.06 eV) than Cu 2 O, which proves that the heterojunction and m-MCs structure effectively narrow the bandgap and promote the light-harvesting ability. [29] In the steady-state photoluminescence (PL) spectra (Figure 5c), the intensity of PL from Cu 2 O/CeO 2 -2 is significantly reduced, indicating that the successful construction of heterojunction could promote the effective separation of photogenerated charges. [30] Meanwhile, the charge carrier dynamics were probed by the time-resolution PL (TRPL) spectroscopy (Figure 5d), and the average lifetime of Cu 2 O/CeO 2 -2 (0.85 ns) is shorter than that of Cu 2 O (0.99 ns).…”

Section: Resultsmentioning

confidence: 99%

Cu₂O/CeO₂ Photo‐electrochemical Water Splitting: A Nanocomposite with an Efficient Interfacial Transmission Path under the Co‐action of a p–n Heterojunction and Micro‐mesocrystals

Wang

Tang

et al. 2022

Chemistry A European J

View full text Add to dashboard Cite

Cu 2 O is an ideal p-type material for photo-electrochemical (PEC) hydrogen evolution, although serious electron-hole recombination and photocorrosion restrict its further improvement for PEC activity. In this work, CeO 2 nanoparticles (NPs) self-assemble on the surface of Cu 2 O octahedra, thus successfully forming a Cu 2 O/CeO 2 structure in which p-n heterojunctions and micro-mesocrystals (m-MCs) work together. The optimum Cu 2 O/CeO 2 composite, without the use of any cocatalyst, exhibits a fivefold higher photocurrent density (4.63 mA cm À 2 at 0 V vs. the reversible hydro-gen electrode) than that of Cu 2 O octahedra, which is better than most Cu 2 O-based photocathodes without cocatalyst and even comparable with advanced Cu 2 O-based photocathodes. The hydrogen production of the optimal Cu 2 O/CeO 2 (Faradaic efficiency of ~100 %) is 17.5 times higher than that of pure Cu 2 O octahedra, and the photocurrent shows almost no decay under the 12 h stability test. The delicately designed Cu 2 O/CeO 2 structure in this work provides reference and inspiration for the design of cathodes materials.

show abstract

Section: Resultsmentioning

confidence: 99%

Cu₂O/CeO₂ Photo‐electrochemical Water Splitting: A Nanocomposite with an Efficient Interfacial Transmission Path under the Co‐action of a p–n Heterojunction and Micro‐mesocrystals

Wang

Tang

et al. 2022

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…The determined E g values of CdS and CdS/MCC are 1.94 and 2.03 eV, respectively. Compared with pure CdS, the narrower bandgap value of CdS/MCC-10% indicates that it can absorb a wider range of visible-light, which can be favorable for photocatalytic reactions ( Zhao et al, 2021 ).…”

Section: Resultsmentioning

confidence: 99%

Ultrasonic-Assisted Synthesis of CdS/Microcrystalline Cellulose Nanocomposites With Enhanced Visible-Light-Driven Photocatalytic Degradation of MB and the Corresponding Mechanism Study

Zhu

Zhang

et al. 2022

Front. Chem.

View full text Add to dashboard Cite

A simple and efficient ultrasonic-assisted approach was designed to synthesize CdS/microcrystalline cellulose (MCC) nanocomposite photocatalyst. The obtained products have been characterized by XRD, FE-SEM, TEM, UV-Vis DRS, and nitrogen adsorption isotherms. The results showed that the intimate contact of MCC and CdS is beneficial for enhancing the photocatalytic performance because heterojunction formation can efficiently promote the separation of photogenerated electrons and holes of the nanocomposite photocatalyst. By using 10% MCC coupled CdS, the decoloration rate of methylene blue (MB) in the solution under visible-light was increased nearly 50%. In addition, the reuse experiments confirmed that the CdS/MCC nanocomposite photocatalyst had outstanding cycle performance and durability. Mechanism study demonstrated that hydroxyl radicals, photogenerated holes and superoxide radicals were the active species in the photocatalytic oxidization degradation of MB.

show abstract

Section: Recent Progress In Mof-based Photocatalystsmentioning

confidence: 99%

“…The photogenerated electron is transferred from the LUMO of the MOF to the CB of the CdS to reduce Cr (VI) . Zhao et al 116 reported the fabrication of a MIL-53(Al)-NH 2 /CdS composite via a hydrothermal formation of CdS crystals on the MIL-53-NH 2 surface. The composite, with 7% CdS, had narrower bandgap energy (2.5 eV) than the pure MOF (2.62 eV).…”

Section: Recent Progress In Mof-based Photocatalystsmentioning

confidence: 99%

Recent Progress in the Development of MOF-Based Photocatalysts for the Photoreduction of Cr^(VI)

Jafarzadeh

2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

There has been a direct correlation between the rate of industrial development and the spread of pollution on Earth, particularly in the last century. The organic and inorganic pollutants generated from industrial activities have created serious risks to human life and the environment. The concept of sustainability has emerged to tackle the environmental issues in developing chemical-based industries. However, pollutants have continued to be discharged to water resources, and finding appropriate techniques for the removal and remedy of wastewater is in high demand. Chromium is one of the high-risk heavy metals in industrial wastewaters that should be removed via physical adsorption and/or transformed into less hazardous chemicals. Photocatalysis as a sustainable process has received considerable attention as it utilizes sunlight irradiation to remedy Cr(VI) via a cost-effective process. Numerous photocatalytic systems have been developed up to now, but metal–organic frameworks (MOFs) have gained growing attention because of their unique versatilities and facile structural modulations. A variety of MOF-based photocatalysts have been widely employed for the photoreduction of Cr(VI). Here, we review the recent progress in the design of MOF photocatalysts and summarize their performance in photoreduction reactions.

show abstract

Gear-shaped mesoporous NH2-MIL-53(Al)/CdS P-N heterojunctions as efficient visible-light-driven photocatalysts

Cited by 69 publications

References 49 publications

Cu₂O/CeO₂ Photo‐electrochemical Water Splitting: A Nanocomposite with an Efficient Interfacial Transmission Path under the Co‐action of a p–n Heterojunction and Micro‐mesocrystals

Cu₂O/CeO₂ Photo‐electrochemical Water Splitting: A Nanocomposite with an Efficient Interfacial Transmission Path under the Co‐action of a p–n Heterojunction and Micro‐mesocrystals

Ultrasonic-Assisted Synthesis of CdS/Microcrystalline Cellulose Nanocomposites With Enhanced Visible-Light-Driven Photocatalytic Degradation of MB and the Corresponding Mechanism Study

Recent Progress in the Development of MOF-Based Photocatalysts for the Photoreduction of Cr^(VI)

Contact Info

Product

Resources

About

Gear-shaped mesoporous NH2-MIL-53(Al)/CdS P-N heterojunctions as efficient visible-light-driven photocatalysts

Cited by 69 publications

References 49 publications

Cu2O/CeO2 Photo‐electrochemical Water Splitting: A Nanocomposite with an Efficient Interfacial Transmission Path under the Co‐action of a p–n Heterojunction and Micro‐mesocrystals

Cu2O/CeO2 Photo‐electrochemical Water Splitting: A Nanocomposite with an Efficient Interfacial Transmission Path under the Co‐action of a p–n Heterojunction and Micro‐mesocrystals

Ultrasonic-Assisted Synthesis of CdS/Microcrystalline Cellulose Nanocomposites With Enhanced Visible-Light-Driven Photocatalytic Degradation of MB and the Corresponding Mechanism Study

Recent Progress in the Development of MOF-Based Photocatalysts for the Photoreduction of Cr(VI)

Contact Info

Product

Resources

About

Cu₂O/CeO₂ Photo‐electrochemical Water Splitting: A Nanocomposite with an Efficient Interfacial Transmission Path under the Co‐action of a p–n Heterojunction and Micro‐mesocrystals

Cu₂O/CeO₂ Photo‐electrochemical Water Splitting: A Nanocomposite with an Efficient Interfacial Transmission Path under the Co‐action of a p–n Heterojunction and Micro‐mesocrystals

Recent Progress in the Development of MOF-Based Photocatalysts for the Photoreduction of Cr^(VI)