PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
Dongjun Chen,Juan Liu,Zhen Qian,Yunpeng Xiao,Yifan Liu,Yuancai Lv,Xiaoxia Ye,Chunxiang Lin
In the wake of the 2011 Fukushima nuclear disaster, the presence of radioactive cesium ( 137 Cs) in nuclear wastewater has posed a critical and enduring health risk. Addressing this challenge, we have synthesized a gelatin aerogel, denoted as KCuFC/GA, immobilized with potassium cupric ferrocyanide (KCuFC) through an in situ approach, aiming for the efficient extraction of 137 Cs from aqueous environments. This novel aerogel's rich porous structure enhances the accessibility of adsorption sites, thereby significantly promoting the capture of Cs + . The adsorption of cesium onto KCuFC/GA was investigated under various experimental conditions, including initial solution pH, contact time, initial cesium concentration, and the presence of coexisting ions (K + , Na + , Ca 2+ , Mg 2+ , Sr 2+ ). The results indicated that the adsorption performance was largely independent of pH, achieving a high cesium removal rate of 93.4 % within the first 5 minutes. The cesium adsorption data were well-described by the Langmuir adsorption model, indicating a maximum adsorption capacity of 222.22 mg·L −1 . Furthermore, in the presence of various competing ions, KCuFC/GA has demonstrated unparalleled selectivity for Cs + , with a partition coefficient ( K d ) of 2.49 × 10 5 mL·g −1 , and has sustained its adsorptive properties across five cycles of use. Through systematic investigation, including X-ray photoelectron spectroscopy (XPS) analysis, we have elucidated the adsorption mechanism, highlighting the pivotal role of ion exchange between lattice K + and Cs + . The straightforward fabrication process and the aerogel's robust cesium removal capabilities from complex solutions indicate that KCuFC/GA is a promising candidate for real-world applications in the treatment of radioactive wastewater.
研究领域:
环境科学
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材料科学
·
核能工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Rong Wu,Yansong Yue,Qingya Wang,Jing Wei,Liberato Manna,Fangze Liu,Hongbo Li
Metal halide perovskites (MHPs) are promising materials for radiation detection. Compared with polycrystalline films, single crystals (SCs) have lower defect density, higher carrier mobility, and lifetime. However, the direct synthesis of MHP SCs for large-area flat panel imaging detectors remains challenging. Here, we show that high-quality centimeter-sized CsPbBr3 SCs with thicknesses between 0.25 mm and 1 mm can be grown by a space-confined inverse temperature method. The addition of choline bromide to the precursor solution reduces the defect density and suppresses ion migration of the CsPbBr3 SCs, leading to a high resistivity of 2.5 × 1010 Ω cm and a high mobility-lifetime product of over 1 × 10–3 cm2 V–1. The CsPbBr3 SC spectral detectors exhibit an energy resolution of 14.96% for 241Am 59.5 keV X-ray and 15.95% for 5.48 MeV α-particles. Moreover, a prototype 3 × 3 pixelated detector based on the large-area SC shows a consistent high performance for all pixels, making it promising for high-resolution flat panel imaging detectors.
研究领域:
材料科学
·
辐射探测技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2025
·
IF 3.5
Jiumei Chu,Debin Wang,Xue Yang,Mengyu Lin,Dianquan Dong
In the previous work, our research group adopted sol-gel technology to incorporate trace Zn 2+ into the Ti–O lattice of Cs 2 Ti 6 O 13 to improve the cell structure and prepared zinc-doped titanate precursor material (CZnTO). This precursor is acid-treated to form a zinc-doped protonated titanate (HZnTO). Based on previous studies in our research group, this paper proposed a membrane support and creating technology for preparing powdered zinc-doped titanium-based cesium ion sieves. It made a batch adsorption test to explore the adsorption performance of Cs + . The main research contents are as follows: A phase transition synthesis method is used to composite PVDF material with powdered ion sieve HZnTO to form a microporous hydrophobic polymer membrane HZnTO@PVDF. The higher the pH in the solution, the greater its saturated adsorption capacity. The composite membrane maintains good stability in both acidic and alkaline solutions. Compared with the powdered ion sieves, HZnTO@PVDF the adsorption rate is significantly faster, reaching saturated adsorption capacity in about 2 h in 3000 mg/L Cs + solution. HZnTO @ PVDF has good cyclic adsorption stability, maintaining 90.33 % of the initial adsorption capacity after five adsorption-desorption cycles. Moreover, after 5 cycles, the composite membrane still maintained the integrity of its original structure.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2025
·
IF 1.6
Ran Maobiao,Gou Xiaoliang,Wang Pingping,Chen Shunzhang,Shu Xiaoyan,Liu Yi,Zhang Shengdong,Lu Xirui
In this study, the pollucite solidified form was hydrothermally synthesized by metakaolin, non-radioactive CsCl, and NaOH to immobilize CsCl in the radioactive molten salt waste. At 200 °C, the immobilization ratio of Cs increased with the enhancement of reaction system alkalinity by NaOH, but it was also accompanied by the formation of sodalite. Excessive Si was adverse to the crystallization of the solidified form. In addition, the proportion of Cs in the solidified form was constrained by the substitution competition between Cs + and Na + , which was affected by reaction time. The nucleation and growth of pollucite mainly occurs from 2 to 4 h, and the CsCl immobilization ratio could reach 36.27 wt .% at 6 h. The thermal weight loss rate of the solidified form within 1000 °C was less than 4 wt .%, and the normalized leaching rate of Cs was 5.05 × 10 –5 g m −2 d −1 for 14 d, showing reliable thermal stability and chemical durability. Graphical abstract
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 45
·35453-35460
·
IF 3.84
Chunyan Sun,Feng Zhang,Shengfang Li,Fangqin Cheng
The ordered hexagonal mesoporous silica (SBA-15) encapsulated ammonium molybdophosphate (AMP) was successfully synthesized using low-grade natural clay from Qaidam Basin as silica and aluminum source, through a one-pot synthesis method. The final product was fully characterized, which indicated that the composite material had better AMP dispersion and immobilization in the mesoporous structure of SBA-15. The adsorption capacity of the final product for removing cesium ions in solution was also investigated. Results suggested that Qaidam natural clay is a promising low-cost precursor for the production of mesoporous silicate supports, and the final composite material is effective for the adsorption of cesium ions from solution containing other alkali metal ions.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2018
·Vol. 29
·期 5
·055601
·
IF 3.404
Huimei He,Bing Tang,Ying Ma
Room temperature recrystallization is a simple and convenient method for synthesis of all-inorganic perovskite nanomaterials with excellent luminescent properties. However, the fast crystallization usually brings the colloidal stability and uncontrollable synthesis issues in the formation of all-inorganic perovskite. In the present study, we present a new strategy to prepare the quantum confined CsPbBr3 nanocrystals with controlled morphology under ambient condition. With the assist of fatty acid-capped precursor, the crystallization and the following growth rate can be retarded. Thanks to the retarded reaction, the morphology can be varied from nanowires to nanoplates and the thickness can be controlled from 5–7 monolayers by simply adjusting the amount of octylammonium cations and oleic acid. The nanoplates exhibit a higher photoluminescence quantum yield than the nanowires possibly due to fewer defects in the nanoplates.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 8
·085708
·
IF 1.449
Bian Wang,Qingjuan Wang,Yuting Zhu,Litao Kang,Jingxin Zhu,Fuyi Jiang,Wei Du,Dongjiang You,Zongtao Zhang,Feng Gao
Cesium tungsten bronze (CsxWO3) is an important functional material for energy efficient windows, showing excellent near infrared (NIR) shielding ability but no optical switching ability. In this paper, we demonstrate a photo-/thermo-dual-responsible CsxWO3/PNIPAM composite by dispersing CsxWO3 nanoparticles into PNIPAM hydrogels. Combination of the photothermic conversion ability of CsxWO3 with the thermochromic property of PNIPAM makes this hydrogel responds to both thermo- and photo-stimuli. In sunlight, the CsxWO3 component converts the absorbed infrared light into heat, triggering the phase transition of PNIPAM and switching the hydrogel into visibly opaque state (for example, transmittance decreased from 58% down to 15% at 590 nm). At the same time, an ambient temperature >32 °C can also initiate the phase transition of PNIPAM. Therefore, a photo- and/or thermo-derived transition between a 'transparent NIR-shielding' state and a 'full-solar-spectrum shielding' state is achieved, making it highly attractive for the applications as energy efficient windows for buildings in hot climate.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
Carbon Energy
·
2023
·Vol. 6
·期 3
·e447
·
IF 20.5
Mengmeng Ma,Jingzhen Li,Xiaogang Zhu,Kong Liu,Kaige Huang,Guodong Yuan,Shizhong Yue,Zhijie Wang,Shengchun Qu
Graphitic carbon nitride (g-C 3 N 4 ) has been extensively doped with alkali metals to enlarge photocatalytic output, in which cesium (Cs) doping is predicted to be the most efficient. Nevertheless, the sluggish diffusion and doping kinetics of precursors with high melting points, along with imprecise regulation, have raised the debate on whether Cs doping could make sense. For this matter, we attempt to confirm the positive effects of Cs doping on multifunctional photocatalysis by first using cesium acetate with the character of easy manipulation. The optimized Cs-doped g-C 3 N 4 (CCN) shows a 41.6-fold increase in visible-light-driven hydrogen evolution reaction (HER) compared to pure g-C 3 N 4 and impressive degradation capability, especially with 77% refractory tetracycline and almost 100% rhodamine B degraded within an hour. The penetration of Cs + is demonstrated to be a mode of interlayer doping, and Cs–N bonds (especially with sp 2 pyridine N in C═N–C), along with robust chemical interaction and electron exchange, are fabricated. This atomic configuration triggers the broadened spectral response, the improved charge migration, and the activated photocatalytic capacity. Furthermore, we evaluate the CCN/cadmium sulfide hybrid as a Z-scheme configuration, promoting the visible HER yield to 9.02 mmol g −1 h −1 , which is the highest ever reported among all CCN systems. This work adds to the rapidly expanding field of manipulation strategies and supports further development of mediating served for photocatalysis.
研究领域:
材料科学
·
化学
·
环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
KEY ENGINEERING MATERIALS
·
2012
·
IF 0
Zi Li Liu,Cui Xia Xu,Qian Wen Dai,Chao Xiang,Jian Jie Zhang
Supported H3PW12O40 (HPW) and supported Cesium-Substituted dodecatungsto-phosphate are eco-friendly solid acid catalysts. A series of different loading H3PW12O40/SiO2 and HPW/diatomite were prepared by a typical incipient wetness impregnation of methanol, meanwhile SiO2 and diatomite supported Cs-salt catalysts were prepared via two-step impregnating method. The catalysts were investigated by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). The results indicate that the Keggin structure of HPW is intact in the SiO2-supported HPW and SiO2-supported CsHPW. HPW and CsHPW are highly dispersed in the SiO2 at the low loading, while the loading is more than 40% the catalyst grains increase and gather on the surface of the carrier. What's more, diatomite is not a suitable support. HPW and CsHPW have better distribution in the SiO2 than in the diatomite. The activity of catalyst was tested in probe experiment of the alkylation of thiopene (TH) with 1-hexene.
研究领域:
催化化学
·
材料科学
✓ 已验证
DOI
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2020
·
IF 4.495
Yaqian Zhang,Jianming Liu,Huiling Zhang,Qingyun He,Xiaojuan Liang,Weidong Xiang
In this work, a series of perovskite nanocrystals glasses with different concentrations of Tb 3+ doped CsPbI 3 , which have excellent characteristics in terms of water resistance and cyclic thermal stability, were prepared by melt quenching and in situ crystallization methods. With the introduction of Tb 3+ , the photoluminescence quantum yield of CsPbI 3 was greatly improved. Considering that the two fluorescence peaks of Tb 3+ and CsPbI 3 at different positions respond differently to temperature stimuli, we studied the potential application of those glasses as optical temperature detection tools in the temperature range of 80−480 K. More importantly, the results showed higher sensitivity than other tools, with the maximum absolute and relative temperature sensitivities reaching as high as 0.034 K −1 and 1.78 % K -1 , respectively. This work is expected to provide an effective method for the application of CsPbX 3 in high-performance optical temperature sensing materials.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Wanjun Mu,Qianghong Yu,Xingliang Li,Hongyuan Wei,Yuan Jian
Efficient, irreversible capture of radioactive strontium and cesium from aqueous media remains a serious task for nuclear waste disposal and environmental protection. To address this task, an effective sorbent based on magnetic composites coated with the synthetic porous exchanger WO 3 was prepared by a facile method and characterized in detail. XRD analysis indicated that the WO 3 coating did not change the phase of the Fe 3 O 4 core, and TEM imaging further showed that Fe 3 O 4 @WO 3 particles were successfully obtained with nearly uniform size. A batch of experiments was carried out to investigate the efficiency of Fe 3 O 4 @WO 3 in removing Sr 2+ and Cs + under various environmental conditions. Experimental results showed that Fe 3 O 4 @WO 3 has higher adsorption capacity for Sr 2+ and Cs + in acidic aqueous solution in comparison to the previous literature. The theoretical maximum adsorption capacities of Fe 3 O 4 @WO 3 for Sr 2+ and Cs + are 44.178 and 53.175 mg g −1 , respectively, as modeled by Langmuir isotherms. The adsorption process is fast and reaches equilibrium within 3 h, which is attributed to the good dispersion of WO 3 on the surface of Fe 3 O 4 and provided much more adsorption sites. Other than Ca 2+ and K + , coexisting electrolyte ions had no significant competition effects on the removal of Sr 2+ and Cs + by Fe 3 O 4 @WO 3 . In addition, the Fe 3 O 4 @WO 3 adsorbent remains stable in acidic solutions and may be repeatedly used 5 times without any noticeable loss in adsorption capacity; the used adsorbents can be easily separated from the aqueous solution using a magnetic method. The advantages of being nontoxic, highly stable, and resistant to acid, as well as having high adsorption capacity for Sr 2+ and Cs + , indicate that Fe 3 O 4 @WO 3 has significant potential for real radioactive wastewater treatment.
研究领域:
化学工程
·
环境科学
·
核能技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2017
·Vol. 5
·期 42
·11076-11082
·
IF 5.256
Jingjing Mei,Fei Wang,Yunpeng Wang,Cancan Tian,Hongzhen Liu,Dongxu Zhao
In this work, the solvent effects of chemically synthesized CsPbBr3 quantum dots (QDs) were investigated by dissolving the QDs into solvents of different polarities. The QDs exhibited green fluorescence in non-polar solvents like 1-octadecene, hexane and ether, but exhibited blue fluorescent color in solvents of higher polarities (ethanol or acetone). The photoluminescence (PL), Fourier transform infrared (FTIR), transmission electron microscope (TEM) and time-resolved PL characterization revealed the difference between QDs in the two types of solvents. The hydrogen bonding system of –NH2 and polar solvents was responsible for the different fluorescent colors. Also, energy transfer between the QDs and the hydrogen bonding system was observed and confirmed by using ultrafast femtosecond transient absorption spectroscopy. We expect that the solvent effects of CsPbBr3 QDs have potential applications in fluorescence probes and photoelectrical devices.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）