Synthesis of crystalline carbon nitride with molten salt thermal treatment for efficient photocatalytic reduction and removal of U(VI)

Wu, Zhiwen; Wang, Bo; Zhu, Yean; Xue, Jinming; Nie, Yidan; Xie, Zong‐Bo; Zhang, Le

doi:10.1007/s11164-023-04993-w

Cited by 10 publications

(3 citation statements)

References 49 publications

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“…In addition, the theoretical equilibrium adsorption capacity of the quasi-second-order kinetic model is 257.1 mgg -1 , which is similar to the experimental results. This indicates that the quasi-secondorder kinetic model can well explain the kinetic process of uranium (VI) adsorption by adsorbents, and suggests that the adsorption process is mainly dominated by chemical adsorption [45] [46]. On the other hand, the straight line of the intra-particle diffusion model in Fig.…”

Section: Effect Of Adsorption Time and Adsorption Kineticsmentioning

confidence: 73%

Preparation of phosphinimide and its adsorption of uranium in aqueous solution

Liu,

Wang,

Wang

2024

Res Chem Intermed

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The phosphinimide materials described in this paper were synthesized by polymerization precipitation. The properties of complexes coordinated with metal ions can be used as adsorbents for the adsorption of radioactive elements by using ligands such as imide and phosphorus groups. Then, the synthetic phosphinimide was characterized in detail by FT-IR, SEM, EDS and XPS, and its morphology and structural changes were studied. In addition, the effects of the material on the removal of uranium(VI) from aqueous solutions at different pH, sorbent doses, contact times, initial concentrations, and temperatures were studied. The experimental data show that the adsorption process can fit the second-order kinetic model well, which is in line with the Langmuir isotherm model. The thermodynamic study of adsorption shows that the adsorption process is a spontaneous endothermic process. In addition, at a temperature of 303.15 K and pH = 6, the maximum adsorption of uranium (VI) by phosphinimide in 25 minutes can reach 276.2 mgg -1 . Keywords phosphinimide  polymerization precipitation  adsorption  uranium (VI)  endothermy

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Section: Effect Of Adsorption Time and Adsorption Kineticsmentioning

confidence: 73%

Preparation of phosphinimide and its adsorption of uranium in aqueous solution

Liu,

Wang,

Wang

2024

Res Chem Intermed

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“…The recyclability and reuse of catalysts should also be considered. According to current reports, the catalysts used in photocatalysis are usually powder materials [ 70 , 126 , 127 ]. When these powder materials are dispersed into the water environment, they may cause secondary pollution, which greatly limits the practical application of photocatalytic technology.…”

Section: Current Challenges and Perspectivementioning

confidence: 99%

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

Zhu

Wang

et al. 2023

Nanomaterials

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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.

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“…Researchers have found that visible light has a wide range of practical applications in the fields of organic synthetic chemistry 36–41 and photocatalytic composite materials. 42,43 Inspired by recent photochemical studies, we report a new approach for the green synthesis of quinazolinones using benzyl bromide and 2-aminobenzamide under mild conditions without additives, oxidants, or catalysts. The optimal reaction conditions were determined, and the gram-scale application of the reaction was examined.…”

Section: Introductionmentioning

confidence: 99%