JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2026
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IF 1.7
Li Shiyu,Fu Chengyun,Zhou Duo,Tian Qiang,Henderson Mark Julian,Zhu Shan,Yan Minhao
The adsorption of Sr 2+ and Cs + onto Gaomiaozi bentonite colloids (GMZC) was investigated to evaluate their role in radionuclide migration. The results show that within a concentration range of 20–100 mg·L⁻ 1 for Sr 2+ and Cs + , the distribution coefficient decreases with increasing ion concentration. The mechanistic study indicates that the adsorption of Sr 2+ is predominantly governed by surface complexation, whereas that of Cs + is mainly driven by ion exchange. Furthermore, Sr 2+ induces structural ordering of GMZC layers and promotes particle aggregation. However, in Na-Cl-SO 4 groundwater, the bentonite suspension showed poor stability and a significantly weakened adsorption capacity for both 90 Sr and 137 Cs, demonstrating the decisive impact of water chemistry on its barrier function.
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Polymers
·
2026
·Vol. 18
·期 5
·
IF 5.8
Weifang Yang,Wei Li,Tian Chen,Lu Wang,Yingying Sun,Jing Zhang,Keyong Tang,Ying Pei
The exceptional mechanical strength and toughness of collagen arise from its well-defined hierarchical architecture. Conventional methods for obtaining collagen aggregates (CAs), such as direct extraction from native tissues or acid swelling followed by mechanical processing, offer limited control over dimensional uniformity and provide little insight into the underlying exfoliation mechanisms. To overcome these challenges, this study introduces a novel strategy that leverages insights into the hierarchical interactions within collagen. We employ the ionic liquid 1-allyl-3-methylimidazolium chloride ([AMIM]Cl) as an exfoliating agent to successfully isolate fibrous CAs from native bovine tendon. By precisely modulating temperature and processing time, we achieve CAs with tunable mesoscale dimensions (diameter 0.9–1.1 μm, length > 160 μm). Molecular dynamics simulations reveal that [AMIM]Cl disrupts the intramolecular hydrogen-bonding network within collagen, thereby facilitating controlled exfoliation. These exfoliated aggregates serve as fundamental building blocks for fabricating collagen films. The resulting materials exhibit robust mechanical integrity, high transparency, reversible pH-responsive behavior, and excellent biocompatibility as verified by cytotoxicity assays, which together underscore their potential as versatile biomaterial platforms. Furthermore, the integration of single-walled carbon nanotubes yields conductive composites with confirmed electrical functionality. This study thus presents an innovative pathway for the precision processing of collagen and advances the design of high-performance collagen-based biomaterials.
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高影响因子
Science China-Chemistry
·
2025
·
IF 9.7
He Yueyue,Wu Shufang,Li Xiaofei,Zhang Xian-Ming,Fu Dongying
Non-covalent interactions play an indispensable role in the construction of molecular ferroelectrics, as they can regulate the relative orientation and stacking mode between molecules. However, the difficulty and challenge lie in precisely designing and regulating the weak intermolecular interactions, ultimately generating macroscopically reversible spontaneous polarization through synergistic effects, thereby achieving ferroelectricity. Herein, we introduced halogenated ammonium Cl-PA + (Cl-PA + is 3-chloropropylaminium) to regulate non-covalent interactions in the structure of hybrid perovskite, and constructed a photoferroelectric semiconductor (Cl-PA) 2 PbCl 4 with large piezoelectric coefficient ( d 33 = 27.4 pC/N) and high Curie temperature ( T c = 353 K) through the synergistic effect of hydrogen bonding and halogen-halogen interactions. Compared with non-ferroelectric (PA) 2 PbCl 4 (PA + is n -propylaminium), the severe distortion of PbCl 6 octahedra, weakened N–H···Cl hydrogen bond between organic cations and inorganic frameworks, enhanced C–H···Cl hydrogen bond between cations, and the additional Cl···Cl interaction in the structure synergistically induce the ferroelectricity of (Cl-PA) 2 PbCl 4 . In addition, the large dipole moment of Cl-PA is also beneficial for constructing molecular ferroelectrics, and the synergetic effect of non-covalent interactions in (Cl-PA) 2 PbCl 4 provides the possibility for dipole flipping and symmetry breaking. Therefore, constructing molecular ferroelectrics through the synergistic effect of non-covalent interactions essentially utilizes dynamic coupling and precise equilibrium of multiple weak interactions to achieve the formation, stability, and external field flipping of spontaneous polarization. Through this collaborative design, ferroelectrics with high spontaneous polarization ( P s ), low coercive field, and wide temperature range can be achieved, which opens up new directions for flexible electronics and energy storage.
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CHINESE JOURNAL OF CATALYSIS
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2023
·
IF 16.5
Xingzong Dong,Guangye Liu,Zhaoan Chen,Quan Zhang,Yunpeng Xu,Zhongmin Liu
Compared with the rapid deactivation of the Pd/AC catalyst, an eco-friendly Pd-[DBU][Cl]/AC ([DBU][Cl], 1,8-diazabicyclo[ 5.4.0 ]undec-7-ene hydrochloride) catalyst with enhanced stability was synthesized and applied in the hydrochlorination of acetylene. The Pd-20[DBU][Cl]/AC catalyst exhibits 96.7% acetylene conversion and 98.9% selectivity of vinyl chloride within the 24 h evaluation under the conditions of T = 180 °C, GHSV(C 2 H 2 ) = 360 h –1 and V (HCl)/ V (C 2 H 2 ) = 1.2. The enhanced stability of the Pd-[DBU][Cl]/AC catalyst is attributed to the prevention of the reduction of Pd(II) to Pd(0), the inhibition of the formation of coke deposition on the catalyst surface, and the reduction of the loss of Pd species during the reaction. TPD characterization and DFT theoretical simulations confirmed that the PdCl 2 -[DBU][Cl] complex has stronger adsorption of HCl and weaker adsorption of C 2 H 2 and C 2 H 3 Cl compared to PdCl 2 . Furthermore, the catalytic mechanism of acetylene hydrochlorination over the PdCl 2 and PdCl 2 -[DBU][Cl] site was put forward based on theoretical simulations. The good activity and stability of Pd-20[DBU][Cl]/AC in the 60 h lifetime test indicates that it is likely to be a promising alternative to HgCl 2 catalysts.
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JOURNAL OF POLYMER SCIENCE
·
2023
·Vol. 61
·期 12
·1171-1182
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IF 3.4
Yue Meng,Hong Zhai,Ziting Zhou,Xiaoying Wang,Jiandong Han,WenJuan Feng,Yuxin Huang,Yuan Wang,Ying Bai,Jing Zhou,Daping Quan
The development of artificial organs and implants demands new materials with both processability and functionality. A series of star like poly(CL- co -TOSUO) copolymers with different molecular weights are synthesized via ring-opening polymerization. The polymers are modified with norbornene end groups for rapid photo-crosslinking. Due to the random insertion of 1,4,8-trioxaspiro-[4,6]-9-undecanone and well-constructed permanent chemical network, the photo-crosslinked elastomers are more flexible and resilient than conventional poly(ε-caprolactone), with 84% resilience above the melting point. Their thermal and mechanical properties can be fine-tuned by varying the molecular weights of the precursors. The polymer can be fabricated into complex shapes by digital light processing 3D printing. Combined with good cytocompatibility and degradability, the highly flexible elastomers show great potential for tissue engineering. Graphical
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Journal of Environmental Sciences
·
2022
·
IF 6.796
Jinmin Zhao,Linghao Kong,Xingyun Hu,Xianjia Peng
Recycling strongly acidic wastewater as diluted H 2 SO 4 after contaminants contained being removed was previously proposed, however, Cl(-I), a kind of contaminant contained in strongly acidic wastewater, is difficult to remove, which severely degrades the quality of recycled H 2 SO 4 . In this study, the removal of Cl(-I) using PbO 2 was investigated and the involved mechanisms were explored. The removal efficiency of Cl(-I) reached 93.38% at 50℃ when PbO 2 /Cl(-I) mole ratio reached 2:1. The identification of reaction products shows that Cl(-I) was oxidized to Cl 2 , and PbO 2 was reduced to PbSO 4 . Cl 2 was absorbed by NaOH to form NaClO, which was used for the regeneration of PbO 2 from the generated PbSO 4 . Cl(-I) was removed through two pathways, i.e., surface oxidation and •OH radical oxidation. •OH generated by the reaction of PbO 2 and OH − plays an important role in Cl(-I) removal. The regenerated PbO 2 had excellent performance to remove Cl(-I) after six-time regeneration. This study provided an in-depth understanding on the effective removal of Cl(-I) by the oxidation method.
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高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
·
IF 3.8
Jiayi Li,Hengtong Zhang,Hongcai Yang,Shudong Lin
Silver nanowires (AgNWs) exhibit excellent electrical conductivity and hold significant potential for usage in flexible electronics. AgNs can possess a suitable aspect ratio, uniformity, and flexibility that are essential for achieving high-performance flexible transparent conductive films. However, the synthesis of AgNWs presents a challenge in controlling its morphology, often resulting in varying lengths and aspect ratios that are difficult to regulate. Thus, the controlled preparation of AgNWs holds great significance. Herein, AgNWs were synthesized via a polyol method with FeCl 3 and KBr composite metal salt as control agents, silver nitrate as a silver source, ethylene glycol as a reducing agent and solvent, and polyvinylpyrrolidone (PVP) as a growth director. By adjusting the ratio and dosage of FeCl 3 and KBr, the morphology controllability of AgNWs was realized, and the obtained AgNWs can be straight or bendable. The surface morphology and microstructure of the AgNWs were analyzed by scanning electron microscopy (SEM). Due to the synergistic effect of FeCl 3 and KBr, flexible AgNWs with an average diameter of 25–35 nm, an average length of 35–45 um, and an aspect ratio of over 1000 can be obtained. Mechanism studies have shown that through electrostatic interactions, AgCl, AgBr, NO 3 − , and PVP in the reaction mixture can form binding sites for AgCl-PVP-NO 3 − and AgBr-PVP-NO 3 − , thus causing the silver nanowires to become flexible. Meanwhile, the strong polarization effect caused by Br − in the reaction causes the chain growth to become subject to the dual effects of electrostatic repulsion and external forces, resulting in the formation of flexible and soft silver nanowires.
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ACS Omega
·
2020
·
IF 2.87
Ling Chen,Weidong He,Jie Liu
Benefiting from the sol–gel technology and vacuum freeze-drying technology, a novel nanoenergetic composite material nitrated bacterial cellulose (NBC)/CL-20 (hexanitrohexaazaisowurtzitane) has been fabricated. The thermal decomposition kinetic and mechanism have been studied by thermogravimetric analysis–differential scanning calorimetry (TG–DSC) under nonisothermal conditions in a nitrogen atmosphere at multiple heating rates; the process and mechanism of thermal decomposition of NBC/CL-201:1 have also been probed by TG–DSC–IR. The kinetic and thermodynamic parameters, such as activation energy (Ea), per-exponent factor (ln AK), rate constant (k), activation heat (ΔH⧧), activation free energy (ΔG⧧), and activation entropy (ΔS⧧) are calculated. The results indicate that NBC/CL-20 presents much lower activation energy than both of raw NBC and raw NC, and NBC/CL-201:1 exhibits superior thermal performance of heat release and Ea. Moreover, there the existence mechanism has also been probed between NBC and CL-20 during the process of thermal decomposition. The structure and composition have been characterized by a series of characterization methods and indicate that CL-20 has been embedded homogenously in the NBC gel matrix with a prominent porous cross-linked network structure. The impact and friction sensitivities have also been decreased. The whole process effectively avoids high temperatures, and thus ensures operational safety.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
·
IF 7.489
Xin Yu,Jingjing Zhao,Jielin Huang,Jiawei Zhao,Yifan Guo,Yanting Tang,Xinqi Ma,Zhonghua Li,Quanhui Guo,Junwei Zhao
Harvesting broad spectral absorption and visible light photocatalysis of ultrawide bandgap semiconductors are one of most significative topics in the solar energy conversion and utilization fields. In this work, amorphous Cl-Ta 2 O 5−x microspheres were prepared by facile solvothermal method for stabilized visible light photocatalytic hydrogen generation. The acetone absorbed on the interfaces of Ta 2 O 5 nanoparticles induced the formation of oxygen vacancies , enhanced visible light absorption, and formation of Ta 2 O 5−x microspheres with preferred orientations as well as Cl doping. The Cl-Ta 2 O 5−x microspheres showed typical amorphous characteristics and obvious visible light absorption in comparison to those of commercial Ta 2 O 5 . More importantly, the prepared Cl-Ta 2 O 5−x microspheres also showed stabilized visible light photocatalytic hydrogen generation performance in the spectral regions of 400 nm ≤ λ ≤ 600 nm mainly because of the introduction of oxygen vacancy defects and Cl doping, which might significantly expand the application of tantalum oxide semiconductors in the broad spectral photocatalytic water splitting.
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CRYSTAL GROWTH & DESIGN
·
2020
·
IF 4.089
Fangbao Wang,Hongjian Zhang,Qihao Sun,Ahmed Ben Hafsia,Zhangxuan Chen,Binbin Zhang,Yadong Xu,Wanqi Jie
The all-inorganic halide perovskite CsPbBr3 exhibited extraordinary photoelectric properties as well as great potential for various optic-electronic devices. The introduction of a Cl/I dopant is an effective method to optimize their properties. However, it is still a challenge to grow doped CsPbBr3 single crystals from solution. In this work, we report on the crystal growth of Cl/I-doped CsPbBr3 crystals using the modified inverse temperature crystallization (ITC) method. The components of raw materials and solvent in precursors were precisely tailored. The resulting doping ratio between the actual content and the nominal content are 0.99 and 0.046 for Cl and I, respectively. It indicates that I ion doped crystals exhibit more severe stoichiometric deviation due to the lower decomposition energy. The crystal structure, morphology, and optical properties of doped crystals were also investigated systematically. The {101} and {010} facets of as-grown crystals were influenced by the doping process. PL and UV transmittance spectra exhibited changes in the band gap in Cl/I-doped crystals. Finally, the phase diagram of basic photoelectric properties was determined for CsPb(Br1–nCln)3 crystals and it reveals conductive type changes from the P type to N type with an increase in the doping content of the Cl element. The optimum component of CsPb(Br0.93Cl0.07)3 demonstrates the highest resistivity of 4.3 × 109 Ω cm, an on/off ratio of ∼40, and a mobility of 414 cm2 V–1 s–1 as well as the lowest carrier concentration of 3.57 × 107 cm–3. Our work provides a strategy to grow doped halide perovskite crystals and tailor their optical and electrical properties.
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Applied Sciences-Basel
·
2020
·Vol. 10
·期 8
·2663
·
IF 2.474
Honglei Zhang,Qingjie Jiao,Wanjun Zhao,Xueyong Guo,Dayong Li,Xiaole Sun
Featured ApplicationWe aimed to obtain a dense ε-CL-20/polydopamine core-shell structure by chemical bionic technology that can effectively inhibit the solid–solid phase transition existing for CL-20 crystals and greatly enhance the thermal safety. Obtained well-coated CL-20 particles could be employed in high-energy insensitive polymer bonded explosives (PBX), thus promoting the development of weapons and equipment.Abstract2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (CL-20) is a widely used high-energy explosive for the application of energetic materials. However, the phase transformation from ε-CL-20 to γ-CL-20 restrains its further application in polymer bonded explosives (PBXs) and propellants. To inhibit the phase transition of CL-20, dopamine was first used in an efficient and facile method of in situ polymerization to passivate CL-20 crystals. The core-shell microcapsule particles were obtained, and the morphological characterization demonstrates the formation of a dense core-shell structure. The differential scanning calorimetry (DSC) and in situ X-ray diffraction (XRD) test results show that the compact and dense coating delays the ε-CL-20 crystal transformation temperature by about 30 °C, which enhances thermal stability. In addition, with the coating via polymers, the friction sensitivity of ε-CL-20 crystals decreases significantly. The findings indicate a successful application of dopamine chemistry in high-energy explosives, which provides an attractive method to modify the properties of CL-20 crystals.Keywords:energetic crystal;phase transition;CL-20;dopamine;core-shell structure
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ACS Applied Nano Materials
·
2020
·
IF 0
Zidong Wang,Zhe Chu,Chunwei Dong,Ze Wang,Shiyu Yao,Hang Gao,Zhaoyu Liu,Yi Liu,Bai Yang,Hao Zhang
As a family of semiconductor photocatalysts, Sillén-type bismuth oxyhalides (BiOX, X = Cl, Br, I) have attracted widespread interest due to their excellent photocatalytic activity and photoconductivity. However, most current strategies on synthesizing ultrathin 2D BiOX nanosheets (NSs) rely on high temperature and pressure and complex procedures, which seriously confine their large-scale applications. Herein, we develop a simple and facile two-phase method for the synthesis of ultrathin 2D BiOX NSs with highly exposed {001} facets. On the basis of systematically studying the effects of various reaction parameters on the size, thickness, morphology, and composition of the products, the growth mechanism of ultrathin 2D BiOX NSs is presented, which indicates that the suppression of Bi3+ hydrolysis is required for the growth of 2D BiOX NSs with highly exposed {001} facets. The acidic condition prefers the growth of BiOX NSs with ultrathin structure and high crystallinity along the [001] zone axis. By using BiOBr NSs as the example, the photocatalytic activities of ultrathin 2D BiOX NSs are evaluated upon photodegradation of organic compounds and photocatalytic water oxidation. The results show that the organic compound photodegradation is mainly determined by the specific surface area of BiOBr NSs, while the O2 evolution rate of BiOBr NSs for water oxidation is dependent on their photogenerated charge separation efficiency. Because of the larger specific surface area and higher photogenerated charge separation efficiency, BiOBr-acid-0.5 ultrathin 2D NSs exhibits the fastest organic compound photodegradation rate and O2 evolution rate of 445.6 μmol g–1 h–1.
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