DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 14
·5065-5071
·
IF 4.099
Junyi Yang,Xiao Feng,Guangnong Lu,Yulin Li,Chaochao Mao,Zhongliang Wen,Wenbing Yuan
The use of salts as grinding media to assist the mechanosynthesis, and the following one-pot mechanochemical post-synthesis, of hierarchically porous MOFs was carried out efficiently by ball milling. NaCl or KCl were used as a solid solvent to initially pre-grind with 1,3,5-benzenetricarboxylic acid (H3BTC) and copper acetate monhydrate, respectively, for 1 minute, then both mixtures were combined together for a further 20 minutes of grinding, and the resultant mixture was finally washed with ethanol and water to obtain the hierarchically micro-, meso- and macroporous HKUST-1 with a high yield. Moreover, the post-synthesis of these as-obtained hierarchically porous HKUST-1 was easily performed via grinding triethylenediamine (TED) with the above unwashed crude-products for 20 minutes. By adjusting the amount of NaCl and TED added, we simply fabricated the pore- and function-adjustable hierarchically porous HKUST-1. Furthermore, these as-obtained HKUST-1 products showed high performance in the capture of volatile iodine.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xinbo Wang,Cong Yu,Hao Guo,Yongqiang Cheng,Yanwei Li,Daoyuan Zheng,Shanshan Feng,Yanxin Lin
Rapid and high-fidelity detection of radiological iodine species are of extreme importance for the safety of the population and the environment in nuclear fuel reprocessing or in case of nuclear accidents. A simple and universal method to fabricate the sensor to user-friendly devices toward a desired analytical environment would further benefit its applications. Herein, we describe the success of using luminescent spectroscopy for off- and on-line detection of gaseous iodine by a fluorescent film sensor based on a polymer of intrinsic microporosity (PIM-1), a material that possesses intrinsic signal amplification capability and good solubility for processing into desired morphologies. Due to the photoinduced electron transfer (PET) effect, the fluorescence of PIM-1 is quenched drastically upon I 2 exposure, but not much altered by H 2 O, CO 2 , or H 2 S. An off-line I 2 sensor of free-standing PIM-1 membrane and a real-time flue I 2 detector by coating PIM-1 film inside a capillary tube were fabricated and applied. Quick response (few seconds), high signal–noise ratio (five orders of magnitude), low detection limit (few ppb), steam tolerability, as well high reversibility and reusability were achieved, making the material a practically convenient and efficient I 2 sensor.
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 CRYSTAL GROWTH
·
2014
·
IF 1.693
Huanyong Li,Zhi Gu,Haiyang Zhang,Wenwei Li
A modified chemical vapor transport system is developed to grow ZnSe single crystals from zinc–selenium source materials, where iodine serves as the chemical transport agent to avoid the kinetics limitations of the congruent sublimation conditions. ZnSe crystals with different crystalline quality are obtained under various growth conditions. The thermodynamic properties of Zn-Se-I 2 system are studied by combining the mass conservation with the vapor-solid reactions related to crystal growth. The mass transport is analyzed by using the diffusion-convection mathematical model. Depending on initial iodine concentration and the designed temperature difference between source zone and growth zone, the optimum growth conditions can be predicted based on the calculated maximum growth rate. Comparing growth results with theoretical analysis indicates that Zn-Se-I 2 system affords a feasible route to grow ZnSe crystals. High quality ZnSe crystal can be achieved under the theoretically optimized growth conditions.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Yimeng Tang,Hui Zhu,Pei Chen,Fang Liu,Yi Qin,Peng Sun,Yong Yi,Jian Zhou,Tao Duan,Jiehong Lei
Effective capture of radioactive iodine vapor is a crucial part of the spent fuel reprocessing process. In this study, humic acid (HA), which has excellent recognition capture of iodine vapor, is introduced as the active site construction center, functionalizing and modifying alkali-activated collagen fiber (ACF), to prepare the biomass composite functional materials (HA@ACF). The results demonstrate that HA@ACF exhibits exceptional recognition ability and a strong affinity for iodine vapor, with an adsorption capacity of 2811.8 mg/g (ACF is only 1068.6 mg/g). Simultaneously, under relative humidity of 27 % and strong acid conditions, the iodine vapor capture capacity of HA@ACF only decreased by 17.2 %, indicating that the material exhibits excellent iodine capture performance under complex conditions. The excellent adsorption performance is attributed to the synergistic effect of abundant −NHR, C = O, and phenolic hydroxyl active sites in HA@ACF, which recognize and induce iodine vapor, resulting in the capture of iodine molecules as I 3 - . Meanwhile, DFT calculations reveal the excellent adsorption energy (−0.51 eV) of iodine vapor on the phenolic hydroxyl groups on HA . Therefore, the HA@ACF biomass composite functional material can be an ideal candidate adsorbent for the efficient recognition capture of radioactive iodine vapor in airborne effluent.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2024
·
IF 3.2
Qian Zhang,Jun Li,Tian-Jiao Yue,Na Li,Yu-Qin Jiang,Hai-Ming Guo
Four hyper-cross-linked polymers were synthesized by linking electron-rich monomers with an electron-rich cross-linker via the Friedel–Crafts reaction. Among these polymers, P4 , which was constructed with decaalkyne pillar[5]arene and bibenzyl chloride, adsorbed iodine vapor with a capacity of 3.930 g g −1 , outperforming most supramolecular macrocycle-based porous polymers . The pillar[5]arene macrocycle contributed various types of adsorption sites, including aromatic rings , diynes, and oxygen atoms. The abundance of effective adsorption sites and the high specific surface area (1615.5 m 2 g −1 ) were responsible for the excellent adsorption capacity of P4 . Because these polymers are easy to synthesize and regenerate and can be mass produced, they are promising candidates for large-scale applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Tianhao Na,Hui Zhu,Pei Chen,Fang Liu,Yong Yi,Jian Zhou,Tao Duan,Jiehong Lei
During the spent fuel reprocessing, large quantities of radioactive iodine vapor are generated. The complex conditions of high temperature, strong acidity, and high humidity are critical factors to consider when designing iodine vapor adsorbents. This paper reports on the synthesis of an in-situ grown nanoscale zero-valent bismuth-doped polyvinylpyrrolidone (PVP) 3D honeycomb-like porous carbon material (Bi 0 @PVP-C) for the efficient capture and immobilization of iodine vapor under high temperature, strong acidic, and high humidity conditions. Bi 0 @PVP-C exhibits a 3D porous honeycomb morphology with abundant layered structures. At 200 °C, its iodine vapor capture capacity reaches an astonishing 1252.16 mg/g, significantly higher than other bismuth-containing adsorbents. Characterization techniques such as XRD, HRTEM, XPS, and density functional theory calculations using the Dmol3 module in Materials Studio software, demonstrate that the primary mechanism involves a chemical reaction between abundant nanoscale zero-valent bismuth particles within the pores of Bi 0 @PVP-C and iodine vapor. The unique affinity of elemental bismuth for iodine enables the material to selectively capture iodine vapor, forming stable BiI 3 . Furthermore, due to the excellent acid resistance and hydrophobicity of Bi 0 @PVP-C, the iodine vapor capture capacities under conditions of pH = 2 and 75 % humidity remain high at 1003.56 mg/g and 1135.27 mg/g, respectively. Compared to the optimal capture capacity, there is only a slight decrease of 19.8 % and 9.3 %. Therefore, Bi 0 @PVP-C exhibits excellent application potential for iodine vapor capture under complex conditions of high-temperature, high-humidity, and strong acidity.
研究领域:
材料科学
·
核化学与化工
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Shu-Na Liu,Han-Ni Wang,Min-Liang Feng,Kai-Ling Yang,Songliang Cai,Jun Fan,Wei-Guang Zhang,Sheng-Run Zheng
The covalent linking of metal–organic cages (MOCs) with a nanoscale cavity is an efficient strategy to construct functional materials with different properties compared with bulk MOCs, but studies based on this topic are still less explored. In addition, toxic chemical and pollutant uptake, especially iodine vapor adsorption on MOC-based materials, still lacks investigation. Herein, an MOC-extended amorphous network (denoted MOC–DASD) via the covalent linking of an aldehyde-functionalized cationic Pd12L24 MOC (with about 3.5 nm in diameter) with an anionic organic linker, 4,4′-diamino-2,2′-stilbenedisulfonic acid (DASD), was constructed and applied to absorb Cr2O72– in water and capture I2 molecules in vapor. The covalent linkage of MOC and DASD via C═N bonds was confirmed by IR, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and ζ-potential tests. In addition, the original NO3– anions can be easily removed from the MOC–DASD due to the introduction of an anionic linker, thus releasing more effective cavities for guest adsorption. Although there is a lack of exchangeable anions, MOC–DASD still exhibits the ability to capture Cr2O72– in water with moderate capacity and high selectivity. In addition, the MOC–DASD showed a significantly enhanced iodine vapor uptake capacity. The iodine uptake capacity of MOC–DASD reached 3.67 g/g, which is 1.8 times higher than that of bulk MOC. A mechanistic study shows that some of the iodine was closely adsorbed by charge transfer. The release of iodine at 120 °C reveals that approximately 74% of the absorbed iodine can be removed, and the MOC can uptake the iodine again with a capacity of 1.5 g/g, showing good reusability.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Biao-Biao Hao,Na Qiao,Yi Rong,Chen-Xi Zhang,Qing-Lun Wang
A metal–organic framework, {Zn3(BTB)2(μ3-OH)[(CH3)2NH2](H2O)}n (1), was synthesized based on H3BTB (1,3,5-tri(4-carboxyphenyl)benzene). An AC impedance test proves that 1 has a relatively high conductivity performance of 1.52 × 10–3 S·cm–1 at 338 K and 98% RH. The proton conductivity of the composite film 1@CS-9 (CS = chitosan) reaches 1.84 × 10–1 S·cm–1 at 328 K and 98% RH. In addition, 1 is discovered to have a good adsorption effect on iodine vapor, and the adsorption capacity reaches 726 mg·g–1. The multifunctionality caused by dimethylamine cations was investigated for the first time, which has implications for multifunctionality generated by host–guest molecules.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2022
·
IF 4.855
Wanshuang Zhou,Cong Yu,Xinbo Wang
Rapid, sensitive, and high-fidelity detection of toxic radioiodine species is of great importance for first responder activities in case of nuclear accidents. Robust active materials that enable concise device processing and direct online electrical detection of vaporous iodine under ambient conditions are promising and urgently required. Here, we explore the use of a polymer of intrinsic microporosity (PIM-1) as the sensing layer to directly detect the real-time iodine vapor using the electrochemical impedance spectroscopy (EIS) technique. Good solubility of PIM-1 makes it easy for thin film fabrication, while the intrinsic microporosity endows the sensor with strong signal amplification capability. The sensor exhibits marked electrical responses to iodine vapor, with high chemical selectivity (>105× over air, methanol, ethanol, and water), fast response (60 s at room temperature), as well as remarkable resistance change (107× at 30 °C for 5 min). The I2 adsorptive sensing is reversible by simple heating in the air enabling the sensor to be used for at least five cycles. In addition, the resistance change is linearly related to the iodine vapor concentration in the whole range tested, making it useful not only for the qualitative detection of iodine leakage but also for quantification. The report here demonstrates that merging EIS and PIMs can be a useful tool for the electrical sensing of gaseous toxins in the environment.
研究领域:
材料科学
·
环境监测
·
化学传感
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2015
·
IF 4.097
Qi Kang,Xilei Zhu,Xiaolong Ma,Lingqiang Kong,Weiting Xu,Dazhong Shen
In this work, the response of an electrodeless quartz crystal microbalance (EL-QCM) in gaseous phase was investigated by an impedance analysis method. The influence of the gap size, area, position and shape of the electrodes on the resonant and equivalent circuit parameters of the EL-QCM was analyzed and discussed in a modified Butterworth–Van Dyke model. Compared with a conventional QCM, the intensity of resonant peak in EL-QCM is reduced remarkably. An EL-QCM has a quality factor in the order of 10 5 even at an air gap of 1 cm, ensuring an excellent frequency stability of this type of sensor. The excitation electrode can be mounted beside of the center of the quartz disc or outside the detection cell if needed, which offers the convenience in combination with mass and optical measurements. As an example of applications, two EL-QCM sensors in a parallel combination were used to monitor the adsorption processes of iodine vapor on quartz surface and zeolitic-imidazolate framework-8 (ZIF-8) film. The transfer process of iodine between two ZIF-8 films was investigated by the series combination of two EL-QCM sensors.
研究领域:
传感器技术
·
材料科学
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Jingyu Xu,Weiming Liu,Jinghui Zhou,Yue Kong,Mingzhu Gong,Masod Almajarsh,Xiaozhou Zhao,Xing Wang
Personal multifunctional protective mask is becoming an effective and convenient device for maintaining human health. When used in a normal environment, it can prevent the spread of respiratory viruses and bacteria, and absorb UV rays. When used in extreme environments full of iodine vapor, it can effectively absorb iodine vapor. Herein, an eco-friendly multifunctional nanofiber membrane with rapid sterilization ability, ultraviolet absorption and iodine vapor trapping capacity was prepared using lignin and polyvinylpyrrolidone as raw materials through electrostatic spinning technology. The results showed that PVP-WSL and PVP-IL have bactericidal rates of 21.86% and 34.08% for E. coli , 30.27% and 52.64% for S. aureus , respectively. These mask barriers have good UV resistance performance (the UV transmittance was lower than 0.015%) and effective trapping capacity of iodine vapor (the iodine maximum trapping capacity of the PVP-WSL and PVP-IL nanofiber membranes were equally determined to be 294 mg/g and 225 mg/g, respectively). In addition, these membranes have strong thermal stability (initial thermal decomposition temperature was higher than 350 °C) and mechanical properties (tensile strength higher than 1.07 MPa). This work fully meets the requirements of public health protection for degradable and high-performance media and is ideal for multifunctional personal protective equipment.
研究领域:
材料科学
·
环境科学
·
公共卫生
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Chunhui Wu,Qingwei Ping,Xueru Sheng,Na Li,Bing Wang,Jian Zhang
During the reprocessing of irradiated nuclear fuel, radioactive iodine vapor—a hazardous substance threatening environmental safety and human health—is released in substantial quantities, creating an urgent need for adsorbents with high-efficiency iodine trapping capabilities. This study synthesizes BiOBr aggregates via hydrothermal method and loads them onto a three-dimensional (3D) porous aerogel, which is composed of crosslinked polyvinylpyrrolidone (PVP) and polyvinyl alcohol (PVA) (denoted as Bi@PVP/PVA). Compared with Bi@PVP and Bi@PVA, Bi@PVP/PVA shows significantly enhanced iodine adsorption performance: Bi@PVP/PVA-3, featuring a well-developed 3D porous network with optimized pore structure, achieves an exceptional iodine trapping capacity of 2482.2 mg/g at 85 °C, outperforming the single-polymer-supported counterparts. Characterizations confirm that crosslinking between PVP and PVA constructs a macroporous framework, which not only provides abundant sites for uniform loading of BiOBr aggregates but also facilitates iodine diffusion. Kinetic model analysis reveals the dual adsorption mechanism: the PVP/PVA porous network enables rapid trapping of iodine vapor, while chemical reactions between BiOBr and iodine ensure its firm immobilization. This synergistic effect of the carrier’s porous structure and the loaded BiOBr endows Bi@PVP/PVA aerogels with superior iodine treatment efficiency, highlighting their practical value in iodine capture during nuclear fuel reprocessing.
研究领域:
材料科学
·
核工程
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）