NiS@CdS interfacial Schottky junction boosting spatial charge separation for highly efficient photocatalytic reduction of U(VI)

Qin, Zemin; Yang, Chunming; Shuai, Wenjuan; Jin, Jian; Tang, Xin; Chen, Fan; Shi, Taoran; Yin, Yulong; Liang, Yanru; Wang, Yuheng

doi:10.1016/j.seppur.2022.122816

Cited by 24 publications

(8 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also, metal sulfides have been utilized in photocatalytic and electrocatalytic UES in the past few decades due to their suitable electronic band gap, band position, and intrinsically high catalytic activity. [ 35 ] Apparently, a high UO 2 2+ removal rate of 99% was achieved over ZnO‐ZnIn 2 S 4 in simulated seawater with an S‐scheme heterojunction (Figure 3d), due to the occurrence of U(VI) to U(IV) at the interface of ZnO‐ZnIn 2 S 4 . [ 36 ] As is further confirmed, Fang et al.…”

Section: Inorganic Materialsmentioning

confidence: 99%

Emerging Nanomaterials toward Uranium Extraction from Seawater: Recent Advances and Perspectives

Liu,

Wang,

Tang

et al. 2024

Small

View full text Add to dashboard Cite

Nuclear energy holds great potential to facilitate the global energy transition and alleviate the increasing environmental issues due to its high energy density, stable energy output, and carbon‐free emission merits. Despite being limited by the insufficient terrestrial uranium reserves, uranium extraction from seawater (UES) can offset the gap. However, the low uranium concentration, the complicated uranium speciation, the competitive metal ions, and the inevitable marine interference remarkably affect the kinetics, capacity, selectivity, and sustainability of UES materials. To date, massive efforts have been made with varying degrees of success to pursue a desirable UES performance on various nanomaterials. Nevertheless, comprehensive and systematic coverage and discussion on the emerging UES materials presenting the fast‐growing progress of this field is still lacking. This review thus challenges this position and emphatically focuses on this topic covering the current mainstream UES technologies with the emerging UES materials. Specifically, this review elucidates the causality between the physiochemical properties of UES materials induced by the intellectual design strategies and the UES performances and further dissects the relationships of materials‐properties‐activities and the corresponding mechanisms in depth. This review is envisaged to inspire innovative ideas and bring technical solutions for developing technically and economically viable UES materials.

show abstract

Section: Inorganic Materialsmentioning

confidence: 99%

Emerging Nanomaterials toward Uranium Extraction from Seawater: Recent Advances and Perspectives

Liu,

Wang,

Tang

et al. 2024

Small

View full text Add to dashboard Cite

show abstract

“…54 These metals or metalloids have no bandgap and can quickly transfer electrons, also known as co-catalysts. 55 Due to the difference in Fermi levels, electrons generated by photon excitation in semiconductors migrate towards co-catalyst, while holes remain on the semiconductor, promoting effective separation of electrons and holes, thereby improving photocatalytic performance (Fig. 2a).…”

Section: Mechanism Of Photocatalytic Hydrogen Evolution and Structure...mentioning

confidence: 99%

Recent advances in CdS heterojunctions: morphology, synthesis, performances and prospects

Wang,

Xue,

Liu

2024

J. Mater. Chem. A

View full text Add to dashboard Cite

show abstract

“…The simulated removal efficiency of U(VI) in U-containing wastewater was as high as 99% under 90 min under solar light irradiation. This result is attributed to their good zeta potential and optical properties, narrow bandgap, and the high stability of the composite material [ 82 ].…”

Section: Mechanism Of Photocatalytic Uranium Reduction and Identifica...mentioning

confidence: 99%

“…The resulting Schottky barrier will prevent electrons and holes from transferring to the semiconductor, ensuring single one-way transfer of electrons and holes, promoting the separation of photo-generated electrons and holes, and correspondingly improving the photocatalytic performance. Qin et al [ 82 ] synthesized a NiS/CdS composite photocatalyst and demonstrated the existence of an interface Schottky junction between CdS and NiS, boosting spatial charge separation through density functional theory (DFT) calculations for highly efficient photocatalytic reduction in U(VI) ( Figure 6 C–F). The resultant U(VI) extraction efficiency reached 99% within 90 min from the uranium-containing solution.…”

Section: Photocatalysts For Uranium Recovery From Solutionmentioning

confidence: 99%

See 1 more Smart Citation

Advanced Photocatalytic Uranium Extraction Strategies: Progress, Challenges, and Prospects

Zhu

Wang

et al. 2023

Nanomaterials

View full text Add to dashboard Cite

Nuclear energy with low carbon emission and high-energy density is considered as one of the most promising future energy sources for human beings. However, the use of nuclear energy will inevitably lead to the discharge of nuclear waste and the consumption of uranium resources. Therefore, the development of simple, efficient, and economical uranium extraction methods is of great significance for the sustainable development of nuclear energy and the restoration of the ecological environment. Photocatalytic U(VI) extraction technology as a simple, highly efficient, and low-cost strategy, received increasing attention from researchers. In this review, the development background of photocatalytic U(VI) extraction and several photocatalytic U(VI) reduction mechanisms are briefly described and the identification methods of uranium species after photocatalytic reduction are addressed. Subsequently, the modification strategies of several catalysts used for U(VI) extraction are summarized and the advantages and disadvantages of photocatalytic U(VI) extraction are compared. Additionally, the research progress of photocatalytic technology for U(VI) extraction in actual uranium-containing wastewater and seawater are evaluated. Finally, the current challenges and the developments of photocatalytic U(VI) extraction technology in the future are prospected.

show abstract

NiS@CdS interfacial Schottky junction boosting spatial charge separation for highly efficient photocatalytic reduction of U(VI)

Cited by 24 publications

References 50 publications

Emerging Nanomaterials toward Uranium Extraction from Seawater: Recent Advances and Perspectives

Emerging Nanomaterials toward Uranium Extraction from Seawater: Recent Advances and Perspectives

Recent advances in CdS heterojunctions: morphology, synthesis, performances and prospects

Advanced Photocatalytic Uranium Extraction Strategies: Progress, Challenges, and Prospects

Contact Info

Product

Resources

About