SCIENCE OF THE TOTAL ENVIRONMENT
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2024
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IF 8.2
Guohui Wang,Qixin Zhang,Lailai Qin,Kaixuan Tan,Chunguang Li,Lianshun Li,Tinggui Yang,Xiaojuan Liu
A novel metal-organic framework (MOF) material, MIL-100(Fe)-DMA, was synthesized using the solvothermal method. The structure of the MOF was characterized using scanning electron microscopy-energy dispersive X-ray spectroscopy, N 2 adsorption–desorption isotherms, X-ray diffraction analysis, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, and Mössbauer spectroscopy. Batch adsorption experiments were performed to investigate the effects of initial Sr 2+ and Cs + concentrations, adsorption time, pH, and coexisting cations on the adsorption performance of the material. The adsorption mechanism was further elucidated using adsorption kinetics and isotherm models. The results indicated that the adsorption of Sr 2+ and Cs + does not significantly affect the MOF material structure. As reaction time and initial ion concentration increased, the adsorption capacity of MIL-100(Fe)-DMA for Sr 2+ and Cs + increased rapidly and then gradually reached equilibrium. Optimal adsorption occurred under alkaline conditions, with maximum adsorption capacity observed at pH = 8. The adsorption process for Sr 2+ and Cs + was well described by the pseudo-second-order kinetic model, the Weber–Morris model, and the Langmuir adsorption isothermal model. The adsorption process was mainly identified as monolayer chemical adsorption, influenced by multiple factors. Characterization combined with density functional theory calculations revealed that the unsaturated carboxylic acid groups on the surface of the MOFs play a crucial role in the interaction with Sr 2+ and Cs + .
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2024
·
IF 5.8
Zixu Chen,Peigang He,Wanlin Li,Shengjian Zhao,Dechang Jia,Paolo Colombo,Yu Zhou
Geopolymers with zeolite-like structures can effectively immobilize radioactive ions through their three-dimensional cage-like framework. This study investigated the synthesis of geopolymers via cold reaction sintering using metakaolin, anhydrous and nonahydrate sodium metasilicate for Cs + immobilization. Optimizing the Si/Al molar ratio to 1.5:1 and water content to 20 wt% yielded the best mechanical properties and near-complete reaction. The transient liquid phase formed by the dehydration of sodium metasilicate nonahydrate facilitated densification. CsCl incorporation resulted in a predominantly amorphous phase with the formation of NaCl crystals. Toxicity leaching tests demonstrated Cs + immobilization rate exceeding 91 % for CsCl content below 12 wt%. Short-term leaching tests confirmed low leaching rates (< 4 × 10⁻³ cm/day after 4 days), and leachability indices well above the typically required value of 6 for cement-based matrices. These results establish the viability of cold reaction sintered geopolymers for Cs + immobilization, highlighting their promise for nuclear waste management applications.
研究领域:
材料科学
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核废物管理
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DOI
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
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IF 6.3
Xueting Zhang,Jicheng Zhang,Nan Tian,Zhaoxuan Huang,Shiyu Duan,Jilin Wang,Disheng Yao,Guoyuan Zheng,Yanhan Yang,Bing Zhou,Fei Long
Stability of perovskite is the main limitation of the commercialization of perovskite solar cells . Recent studies have shown that FA-Cs perovskites are expected to achieve ideal crystal structures with outstanding stability when FA content is 30 %. And its bandgap can be adjusted to 1.8 eV, making it suitable for a top battery in the tandem cell. However, when the content of Cs ions in the component exceeds 30 %, phase separation occurs. In this study, a Cs-rich Cs 0.7 FA 0.3 PbI 2 Br perovskite film was synthesized by using a 2D to 3D phase transition method. Through the high orientation of the 2D CsPbI 3 -FAI alloy-like phase and the anisotropic volatilization of FA, a well-oriented α-Cs 0.7 FA 0.3 PbI 2 Br perovskite phase is obtained. The α-Cs 0.7 FA 0.3 PbI 2 Br shows excellent thermal and UV stability and improved humidity stability. Meanwhile, the fabricated Cs 0.7 FA 0.3 PbI 2 Br perovskite solar cell achieved a competitive power conversion efficiency of 14.87 % successfully breaking the world record for this perovskite system. This further advances the research progress of Cs-rich perovskites in highly efficient and stable solar cells.
研究领域:
材料科学
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能源研究
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DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 13
·4583
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IF 3.4
Hao Wang,Guihua Ma,Ke Zhang,Zhi Jia,Yuzhuo Wang,Li Gao,Bingxin Liu
Salt lake brine originating from Qinghai, China has abundant cesium resources and huge total reserves. The inorganic ion exchangers ammonium molybdophosphate (AMP) and zirconium phosphate (ZrP) have the significant advantages of separating and extracting Cs+as a special adsorbent. Nevertheless, their high solubility in water leads to a decrease in their ability to adsorb Cs+in aqueous solutions, causing problems such as difficulty with using adsorbents alone and a difficult recovery. In this work, an environmentally friendly polyurethane sponge (PU sponge) with a large specific surface area is employed as an adsorbent carrier by physically impregnating dopamine-coated AMP and ZrP onto a PU sponge, respectively. The experiment found that under the same conditions, the AMP/PU sponge performs better than the ZrP/PU sponge for Cs+adsorption. When the amount of adsorbent reaches 0.025 g, the adsorption capacity reaches saturation. The adsorption efficiency remains above 80% when the concentration of Cs+is 5–35 mg/L. The kinetic calculations show that adsorption is spontaneous, feasible, and has a higher driving force at high temperatures. In addition, the power and mechanism of the interaction between adsorbent and adsorbent are explained using the density functional theory calculation. This efficient, stable, and selective Cs+adsorbent provides design guidelines.Keywords:Cs+adsorption;polyurethane sponge;ammonium molybdophosphate;zirconium phosphate
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
RSC Advances
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2015
·Vol. 5
·期 17
·12517-12529
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IF 3.84
Xiangguo Meng,Yan Liu,Minjia Meng,Zheyu Gu,Liang Ni,Guoxing Zhong,Fangfang Liu,Zhaoyong Hu,Rui Chen,Yongsheng Yan
In this work, two novel Cs(I) ion-imprinted polymers (Cs(I)-IIP1 and Cs(I)-IIP2) have been prepared by surface imprinting technique based on support matrix of SBA-15. The strategy was carried out by introducing two different reversible addition–fragmentation chain transfer (RAFT) polymerization including using the free RAFT agent in solution and surface-anchored RAFT agent with appropriate initiation method, which is expected to generate a well-defined surface ion-imprinted polymer with excellent adsorption capacity. The materials were verified by FT-IR, SEM, TEM, nitrogen adsorption–desorption and TGA. Owing to the intrinsic advantages of surface-anchored RAFT polymerization, the resultant surface ion-imprinted polymer (Cs(I)-IIP2) exhibited more homogeneous and thinner polymer layer (15 nm) with excellent macrostructure in comparison to Cs(I)-IIP1 (75 nm) prepared by using the free RAFT agent in solution. Furthermore, the adsorption capacity of both polymers are compared, indicating that Cs(I)-IIP2 displays higher adsorption property and excellent selectivity for Cs(I).
研究领域:
材料科学
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环境科学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
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IF 3.45
Yushan Yang,Xiaofen Wang,Shunzhong Luo,Xiaoyong Yang,Jiang Ma
[Cs x Ba y ][(Al 3+ ,Ti 3+ ) 2 y + x Ti 4+ 8-2 y - x ]O 16 (0.4 ≤ x , y ≤ 0.8) ceramics were synthesized to investigate the substitution effects of Ba 2+ for Cs + on the stability of hollandite-ceramic waste forms. It was found that the substitution of Ba 2+ for Cs + in the (Cs,Ba)-hollandite system does not cause substantial variation in the crystallographic phase and microstructure. The normalized release rates of Cs and Ba at 90 °C in deionized water were < 0.005 g m −2 d −1 after 28 days. These results indicate that hollandite ceramics are an ideal host for permanent radioactive caesium disposal.
研究领域:
材料科学
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核废料管理
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2025
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IF 7.3
Yanlin Zhu,Wen Zhou,Huimin Wu,Hanzhi Zhang,Xiangjian Meng,Xuehu Men
With the advancement of nuclear industry driving extensive applications of peelable decontamination coatings in nuclear facility decommissioning and emergency situations, current coatings face challenges in balancing cohesion-adhesion properties, as their high peel strength prevents complete removal from high surface energy substrates. In this work, a double crosslinking network strategy is developed, integrating flexible Poly(vinyl alcohol) (PVA) and chitosan polycondensation crosslinked long chains with rigid acrylic and acrylamide radical crosslinked short chains, synergistically enhancing waterborne peelable coating strength via energy dissipation mechanisms. At the same time, the complexation between -OH and -COO − groups on the molecular chain and Cs + is exploited to achieve efficient decontamination effect. The prepared peelable coating demonstrates some advantages, including multiple substrate applications with rapid curing rate, enhanced mechanical strength compared to single-crosslinked network coatings (with a tensile strength of 2 MPa and an elongation at break of 410 %), and low interfacial adhesion (with a peel strength <2.2 N/cm on cement surfaces). Remarkably, it achieves high decontamination efficiencies of 99.70 % on glass surfaces, 99.68 % on stainless steel surfaces and 92.40 % on concrete surfaces, while possessing robust solvent resistance. Therefore, the prepared decontamination coating has excellent potential with widespread application prospects in the field of radioactive surface decontamination.
研究领域:
核工程
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材料科学
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放射性去污
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高影响因子
INORGANIC CHEMISTRY
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2025
·
IF 4.7
Yu-Jie Zhang,Lin Cheng,Ze-Yu Wang,Ze-Jia Shen,Fei-Fei Wang,Jun-Zheng Wang,Zi-Xin Qiu,Shuaihua Wang,Kai-Yao Wang,Cheng Wang
A porous layered tin sulfide material, [(CH3)2NH2]2Sn3S7·0.4H2O (SnS-1), is developed for rapid Cs+ and Sr2+ removal from aqueous solutions. The alignment of hexagonal windows (8.3 × 8.3 Å2 in cross-section) across the stacked layers forms straight pseudochannels that enables effective ion diffusion and accommodation. SnS-1 exhibits outstanding ion exchange kinetics (k2Cs = 0.256 g mg–1 min–1; k2Sr = 0.272 g mg–1 min–1) and capacities (qmCs = 417.24 mg g–1; qmSr = 116.18 mg g–1), exceeding most chalcogenide-based exchangers. It exhibits acid–base resistance across a broad pH range (0–11) and remarkable selectivity for Cs+ and Sr2+ over various competing ions. Dynamic column filtration confirms the separation applicability of SnS-1, featuring sustained Sr2+ removal (RSr = 94.45–99.51%) against Cs+ (RCs = −20 ± 5%). The SnS-1/PTFE composite membrane can efficiently remove Cs+ and Sr2+ from continuous flow (2.0 mL min–1 cm–2), with removal efficiencies exceeding 91.71 and 98.91%, respectively. Moreover, the adsorbed Cs+ and Sr2+ ions can be readily eluted from the spent column and membrane using a 2 M NaCl solution. Combined with simple synthesis, radiolytic stability, and superior performance, microporous SnS-1 emerges as a promising candidate for nuclear wastewater remediation.
研究领域:
材料科学
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环境科学
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化学工程
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PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2024
·
IF 8
Zhenyu Li,Huifeng Deng,Yu Jiang,Jianbin Ju,Xiaowen Huang,Lang Zhang,Guihua Ruan,Zhengyi Chen,Yipeng Huang
Portable fluorescence-based Cs + radionuclide sensing has received great concerns yet challenged by interference in complex sample matrices. Herein, a reliable method was established by in situ converting the preconcentrated Cs + to CsPbBr 3 perovskite nanocrystals in mesoporous silica modified with dibenzo 24-crown-8 ethers (DB24C8E-SiO 2 ), which combined the selective extraction of Cs + with in situ fluorescence derivatization to achieve good anti-interference ability. The high adsorption capacity (49.5 mg g −1 ) of DB24C8E-SiO 2 for Cs + and elution-free operation enabled enrichment factor up to 4500, which was conducive to reducing the limit of detection (LOD) for Cs + . By this method, the fluorescence intensity linearly increased with the Cs + concentration from 0.050 μg mL −1 to 100 μg mL −1 with an LOD of 0.017 μg mL −1 (S/N = 3). The concentration of Cs + in seawater sample was detected to be 0.056 μg mL −1 . The recoveries of Cs + in spiked samples remained above 88.90 % and the relative standard deviations were less than 12.06 %. In addition, the relative errors of this method were within ±13.2 % compared with the result from atomic absorption spectrometry. The study demonstrated the high potential of the method for removal and portable detection of Cs + .
研究领域:
分析化学
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环境科学
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材料科学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Kang Li,Chenxi Li,Yisa Liu,Jiong Dong,Lili Xu,Yanran Li,Ruixin Ma,Shina Li
The widespread application of nuclear energy has increased the risk of contamination by radionuclide 137 Cs. Prussian blue analogues are considered to be excellent materials for the removal of 137 Cs from wastewater due to their unique structure. In this work, Cs + adsorbent for PBAs with Fe-Co framework, potassium iron hexacyanocobaltate (PBA Fe ), was synthesized by room temperature precipitation method. Systematic structural characterization and performance results of PBA Fe showed that it has a specific surface area of 452.8 m 2 /g and an average pore size of 8.6 nm, providing more active sites for Cs + . The adsorption of Cs + on PBA Fe exhibited fast reaction kinetics (within 10 min) and high adsorption capacity (82.90 mg/g), and the removal rate of Cs + reached 98.57 %. The efficient removal of Cs + by PBA Fe in various real water environments showed its excellent selectivity and potential for practical application. In addition, adsorption mechanism studies showed that the adsorption of Cs + was achieved by ion exchange with K + in the PBA Fe lattice. PBA Fe has the advantages of simple synthesis and good selectivity, and has potential application in the harmless treatment of Cs + in radioactive wastewater.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2015
·Vol. 2015
·期 12
·2125-2131
·
IF 2.942
Chunyan Sun,Feng Zhang,Xiao Wang,Fangqin Cheng
Graphical A composite ammonium molybdophosphate/Al-MCM-41 material is synthesized by a one-pot method with natural clay as the silica and aluminum source. A modified “liquid-phase transport” step allows the use of impure natural clay as the starting material to produce pure product without sedimentation pretreatment. The composite material is effective for the adsorption of cesium ions from brine. Ordered hexagonal mesoporous aluminosilicate matrix (Al-MCM-41) with incorporated ammonium molybdophosphate (AMP) was successfully synthesized by a one-pot synthesis method with natural clay from low-grade potash ores of Qinghai salt lake as the silica and aluminum source. We introduced a modified “liquid-phase transport” step, which allowed the use of impure natural clay as a starting material to directly produce pure product without sedimentation pretreatment. The resultant product was characterized by X-ray fluorescence (XRF) spectroscopy, FTIR spectroscopy, XRD, TEM, 27 Al and 31 P magic-angle spinning (MAS) NMR spectroscopy, and N 2 adsorption/desorption, which indicated that the AMP was immobilized in the mesoporous structure of Al-MCM-41. The adsorption capacity of the final product for the removal of cesium ions in solution was also investigated. The results suggested that salt lake clay is a promising low-cost precursor for the production of mesoporous aluminosilicate supports through one-pot syntheses, and the final composite material is effective for the adsorption of cesium ions from solutions containing other alkali metal ions.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2021
·Vol. 47
·期 1
·77-90
·
IF 2.914
Shen Bin,Dong Chencheng,Yang Bo,Xing Mingyang,Zhang Jinlong
Abstract A novel defect-induced inorganic photoluminescence powder silica (CSI-SiO 2 ) nanomaterial was successfully synthesized via a facile method, where Cs + was doped into SiO 2 by ion exchange, and oxygen vacancy defects were produced during a vacuum calcination treatment at high temperature. CSI-SiO 2 was characterized by scanning electron microscopy, X-ray diffraction and photoluminescence spectroscopy. The result showed that CSI-SiO 2 contained merely three elements including Cs, Si, and O. Compared with conventional fluorescent materials, the preparation method of fluorescent material (CSI-SiO 2 ) didn’t need the precursor of heavy metals, rare earth metals and other harm contents, making it capable to be an environmentally friendly candidate. More importantly, CSI-SiO 2 exhibited hyper-stable photoluminescence performance in harsh conditions including strong acidic, weak alkaline, moist and high temperature conditions, which can be applied in security marking. Graphic abstract The mechanism diagram of material CSI-SiO2 for defect-induced photoluminescence.
研究领域:
材料科学
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光学
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DOI
高影响因子
危险品化学品经营许可证（带存储）