CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Luyang Xie,Jie Li,Wenjuan Xue,Haifeng Zou,Jianrui Wu,Zuzhuo Zhang,Yanhua Song,Wenfu Yan,Xueqi Fu,Shuao Wang,Donghai Mei
The selective removal of technetium-99 ( 99 Tc) from radioactive wastewater remains a significant challenge due to its stringent adsorption requirements. In this study, we synthesized a series of imidazolium-functionalized anion exchange resins— N -methyl ( MeMiMCl ), N -butyl ( BuMiMCl ), and N -hexyl ( HeMiMCl ) imidazolium derivatives—to enhance the selectivity and stability for pertechnetate ion ( 99 TcO 4 − ) capture. These resins exhibited high adsorption capacities for Re(VII): 691 mg·g −1 for MeMiMCl , 689 mg·g −1 for BuMiMCl , and 653 mg·g −1 for HeMiMCl . Corresponding distribution coefficients were also significant, reaching 5.27 × 10 6 mL·g −1 for MeMiMCl , 9.99 × 10 5 mL·g −1 for BuMiMCl , and 3.12 × 10 6 mL·g −1 for HeMiMCl . The materials showed excellent chemical and radiolytic stability. Under competitive adsorption scenarios, where NO 3 − to ReO 4 − molar ratios reached 5000: 1, BuMiMCl and HeMiMCl maintained high ReO 4 − removal efficiencies. Their performance was 11 times higher than that of the commercial ZGANR170 resin, highlighting their superior selectivity. Density functional theory calculations revealed that the enhanced selectivity results from stronger interactions between the 99 TcO 4 − anions and imidazolium cations with longer alkyl chains. Furthermore, these resins effectively removed 99 TcO 4 − from simulated Hanford and Savannah River Site waste streams. Due to their high selectivity, stability, and cost-effectiveness, the developed imidazolium-based resins show strong potential for practical applications in nuclear wastewater treatment.
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CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Wei Liu,Heng Zhang,Zhe Zhang,Yali Ji,Tiantian Xu,Xusheng Li,Jiao Chen,Mengyao She,Ping Liu,Shengyong Zhang,Jian-Li Li
Solar-driven photocatalytic CO 2 -to-CH 4 conversion represents a promising strategy to mitigate the energy and climate crisis. However, it is still challenging to achieve efficient CO 2 conversion due to the difficulties of CO 2 activation, sluggish kinetics of water oxidation half-reaction and high cost of sacrificial agents in conventional reaction systems. Herein, by precisely integrating bimetallic sulfide with functionalized UiO-66 to construct a Cu 0.1 Zn 0.9 S/Bim-UiO-66 S-scheme heterojunction photocatalyst, which innovatively accomplished complete CO 2 methanation and benzimidazole synthesis in one redox cycle. Experimental results reveal that the optimized photocatalyst exhibited an exceptional CH 4 production rate of 35.2 μmol h −1 g −1 (selectivity of 100 %) and 92 % benzimidazole conversion under simulated solar irradiation. Mechanistic studies demonstrate that the S-scheme heterojunction significantly enhances photogenerated charge carrier separation efficiency through the establishment of a built-in electric field, while preserving the strongest redox potentials of the two semiconductors. Remarkably, the benzimidazole synthesis process replaced conventional H 2 O oxidation, proving beneficial for CO 2 -to-CH 4 conversion. This work provides new insights into designing high-performance photocatalysts for CO 2 conversion and the synthesis of fine chemicals.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Wensheng Wei,Yuxin Wang,Guangwen Xu,Jinggang Zhao,Lei Shi
In this work, a series of multifunctional integrated heterogeneous catalysts (PS-[EIMBr-COO] 2 M, M = Fe 2+ , Co 2+ , Ni 2+ and Zn 2+ ) with abundant active sites and a dynamic swing-active architecture were successfully constructed, which were applied in catalytic cycloaddition of CO 2 and propylene oxide (PO) for efficient propylene carbonate (PC) preparation. The PS-[EIMBr-COO] 2 Co catalyst demonstrated the best catalytic activity with a 98.92 % conversion of PO, a 99.00 % selectivity towards PC, and a TOF value of 120.75 h −1 at 110 °C. The characterization techniques and theoretical simulation revealed that the excellent catalytic performance of the PS-[EIMBr-COO] 2 Co catalyst was attributed to the synergistic effect of the Lewis acid center, imidazolinium groups (Lewis base), Br − ions (nucleophilic site), and swing-active structure. The synergistic effect between active sites reduced the reaction energy barrier of the rate-determining step, and the swing-active structure in catalyst was believed to improve the contact efficiency between the active site and the reaction substrate. The synthesized PS-[EIMBr-COO] 2 Co catalyst was structurally stable and maintained its initial catalytic ability after seven cycles. Moreover, the PS-[EIMBr-COO] 2 Co catalyst shows good substrate universality for the cycloaddition reactions of epoxides. The catalyst construction strategy of functional integration and flexible active structure has high universality for cycloaddition catalyst design, and has important guiding significance for rational design of efficient heterogeneous catalysts.
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MICROPOROUS AND MESOPOROUS MATERIALS
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2025
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IF 4.7
Rong Wang,Xiaodan Kong
The development of intelligent platforms capable of precisely targeting cancer cells while minimizing toxic side effects on normal tissues remains a significant challenge in medical applications. This study proposes a structurally innovative bipedal Janus nanocarrier (Fe 3 O 4 @TiO 2 &dmSiO 2 /FA) for intelligent drug delivery. The architecture integrates magnetic-responsive and microwave (MW)-responsive Fe 3 O 4 @TiO 2 (core@shell) components with anisotropic growth bipedal mesoporous silica (dmSiO 2 ), the latter being modified with folic acid (FA) targeting ligands. This design achieves dual-mode tumor targeting by concurrently enabling FA-mediated active recognition and magnetic field-guided navigation. The system demonstrates drug release behavior orchestrated through the synergistic interplay between endogenous tumor microenvironmental stimuli (pH 5.3) and exogenous MW irradiation. MTT assays revealed that doxorubicin-loaded nanocarriers exhibit significant cytotoxicity under MW exposure, achieving over 80% proliferation inhibition in multiple cancer cell lines. These results position this nanocarrier as a promising candidate for effective cancer therapy.
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Royal Society Open Science
·
2025
·Vol. 12
·期 7
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IF 2.9
Ruize Zhang,Jiaqi Zhong,Gaosheng Wu,Kaidi Xu,Xiaoli Xu,Xuliang Cui,Baoyun Xu,Xiaolei li
The development of recyclable bio-based epoxy resins has been the focus of research nowadays, particularly in light of increasing environmental concerns and the drive for resource recycling. Herein, two fully bio-based epoxy curing agents, VLYS (fully bio-based Schiff basic epoxy curing agent based on vanillin and lysine) and VLEV (fully bio-based Schiff basic epoxy curing agent based on vanillin and levodopa), were synthesized by reacting amino acids—lysine and levodopa, respectively—with vanillin. Both epoxy resins cured by these two hardeners, VLYS-E and VLEV-E, show high glass transition temperatures (Tg > 141°C) and superior mechanical properties (Young’s modulus >1000 MPa and flexural modulus >2900 MPa), which are far better than the resin system based on a petroleum-based curing agent. The incorporation of the Schiff base endows these resins with degradability and reprocessability, while exhibiting high-percentage retention of thermal and mechanical properties after two cycles. Taken together, these findings suggest that these fully bio-based curing agents hold significant potential to supplant conventional hardeners.
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JOURNAL OF SEPARATION SCIENCE
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2025
·Vol. 48
·期 7
·e70219
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IF 2.8
Xiao-Bei Huang,Yong-Ming Wei,Lin Yu,Zhen-Liang Xu,Hu Yang
Immobilized metal affinity chromatography is a green method applied to the separation and purification of proteins and biomolecules in downstream processing. With its unique internal pores, the membrane carriers have more active sites than typical magnetic nanoparticles and beads. It also greatly overcomes the mass-transfer resistance brought by traditional column chromatography. In this study, polysulfone was selected as the pristine membrane. Tannic acid and 3-aminopropyltriethoxysilane coatings were employed to construct the secondary reaction platform, which was then covalently coupled with polyethyleneimine and grafted with iminodiacetic acid groups to chelate Cu 2+ . Bovine serum albumin was utilized as the adsorption protein to adjust and optimize the modification parameters. The results demonstrated that the adsorption amount per unit membrane area reached 0.19 mg/cm 2 under the solution condition of pH 8.5. The adsorption thermodynamics followed the Langmuir model, and the corresponding model parameters were obtained.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2025
·Vol. 36
·期 20
·1-16
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IF 2.8
Yi Ying,Fang Zeming,Zhu Xiaotao,Wang Zeru,Liu Qianfa,Huang Zengbiao,Chen Junfan,Rong Qianping,Wang Ke
The development of advanced packaging technology has led to increasingly finner circuits, closer spacing, thinner insulating layers, smaller and denser drilling holes in printed electronic circuits. Traditional insulation materials, such as build-up dielectric films and electronic packaging substrates, face big challenges with high dielectric constant and dielectric loss, poor thermal stability, and weak adhesion to conductive layers. This study addresses these issues by developing suitable base resin formulations for build-up films through a detailed evaluations of chemical structures, thermal properties, dielectric performance, etc. with a blended system of epoxy resin and maleimide resin. After comprehensive considerations of thermodynamics, dielectric performance, and processabilities, a composite formulation for build-up dielectric films is determined. The developed build-up film with an epoxy resin to maleimide resin ratio of 8:2 exhibits a dielectric loss of 0.0030 and a dielectric constant of 3.146 at 10 GHz, with an adhesion strength to conductive layer 2.19 N/cm, and a DMA T g 190.9 °C. Meanwhile, the build-up film can pass the stringent requirements of processes such as chemical copper plating, copper sinking, and electroplating.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qinghai Long,Yutao Bai,Anteng Dai,Huajie Qiu,Xuanang Fu,Xiaoyun Chen,Chao Liu,Waseem Hayat,Bihong Lv,Guohua Jing,Zuoming Zhou
In this study, 2-dibutylaminoethanol imidazole ([DBAE][Im]) was developed as a novel ionic liquid for energy-efficient CO₂ capture to address key challenges, such as high energy consumption and elevated regeneration temperatures, associated with conventional amine-based absorbents. The self-extractable behavior of [DBAE][Im] facilitated reversible liquid–liquid phase separation during CO₂ absorption and desorption. The CO 2 absorption loading of the [DBAE][Im] solution (0.5 mol·L −1 ) reached 0.82 mol·mol −1 at 313.15 K, and the regeneration efficiency remained high at 87 % even after five consecutive regeneration cycles at 371.15 K. The reaction and self-extraction mechanisms were determined using carbon nuclear magnetic resonance spectroscopy and quantum chemical calculations. These analyses revealed that the significant polarity difference and weak hydrogen bonding between [DBAE][Im] and water (H₂O) induced a phase transition before CO 2 absorption. During absorption, CO 2 reacted with [DBAE][Im] to form carbamate/bicarbonate (HCO₃ − /CO₃ 2− ) species, which resulted in a homogeneous solution due to the decreased polarity of CO₂ products and the strong hydrogen bonds formed between the products and H₂O. Following thermal desorption, [DBAE][Im] separated into the upper phase, restoring its high polarity and reducing intermolecular hydrogen bonding with H₂O. Owing to its self-extraction capability, the regeneration rate of [DBAE][Im] improved significantly at 371.15 K, while the regeneration heat duty was reduced by 47 % compared to monoethanolamine. The results demonstrate that the novel aqueous [DBAE][Im] absorbent offers substantial energy savings for CO₂ capture, presenting a promising approach for advancing carbon capture technologies.
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Small Methods
·
2025
·
IF 9.1
Ke Wu,Mingzhi Jiao,Miaomiao Yang,Yuting Qiao,Qingxin He,Teng Fei,Zhimin Yang
High-performance and multifunctional humidity sensing have received wide attention in recent years. However, the problem is that sensors with a single signal output and requiring an external power source restrict their further application. Herein, a high-performance dual-mode, self-powered, and flexible humidity sensor is proposed based on a double-network functional ionic hydrogel via a hydrogen bond-rich strategy, resulting in stable humidity sensing performance under different bending states. A 0.56 cm 2 of hydrogel-based sensor achieves 16000 times of resistance change at 95% RH (relative humidity) and generates an output voltage of 0.62 V at 43% RH with good linearity and small hysteresis. Further, the sensor shows outstanding voltage output stability with ≈95% performance retention after 1000 times of bending, and with an output power density of 1.14 µW cm −2 . As a proof of concept, the potential applications of the miniaturized device in respiratory monitoring, emotional analysis, finger discrimination, and portable energy harvesting are evaluated.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2024
·
IF 3.7
Zhaoyang Qi,Shiquan Zhong,Huiyun Su,Changshen Ye,Limei Ren,Ting Qiu,Jie Chen
ABSTRACT Dimethyl carbonate (DMC) is a crucial chemical raw material widely used in organic synthesis, lithium-ion battery electrolytes, and various other fields. The current primary industrial process employs a conventional sodium methoxide basic catalyst to produce DMC through the transesterification reaction between vinyl carbonate and methanol. However, the utilization of this catalyst presents several challenges during the process, including equipment corrosion, the generation of solid waste, susceptibility to deactivation, and complexities in separation and recovery. To address these limitations, a series of alkaline poly(ionic liquid)s, i.e. [DVBPIL][PHO], [DVCPIL][PHO], and [TBVPIL][PHO], with different cross-linking degrees and structures, were synthesized through the construction of cross-linked polymeric monomers and functionalization. These poly(ionic liquid)s exhibit cross-linked structures and controllable cationic and anionic characteristics. Research was conducted to investigate the effect of the cross-linking degree and structure on the catalytic performance of transesterification in synthesizing DMC. It was discovered that the appropriate cross-linking degree and structure of the [DVCPIL][PHO] catalyst resulted in a DMC yield of up to 80.6%. Furthermore, this catalyst material exhibited good stability, maintaining its catalytic activity after repeated use five times without significant changes. The results of this study demonstrate the potential for using alkaline poly(ionic liquid)s as a highly efficient and sustainable alternative to traditional catalysts for the transesterification synthesis of DMC.
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POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Xiaoyu Zhang,Bo Liu,Shanzhe Li,Chunling Zhang
It is of great significance to enhance the fire safety of epoxy resins (EP), especially to reduce the release of heat and smoke. Therefore, in this work, flame retardants PNIM and PNDA were prepared and introduced into EP to achieve the effective suppression of heat and smoke. EP/DDM/PNDA-10 can self-extinguish quickly, achieving the V-0 rating as well as the LOI value of 34.3%. Compared with the Control EP, the peak heat release rate (pHRR), total heat release (THR), and total smoke production (TSP) of EP/DDM/PNDA-10 decreased by 68.7%, 36.2% and 35.7%, respectively. It can be attributed to the P/N synergistic flame retardant effect. During the combustion process, PNIM and PNDA can promote the formation of a dense carbon layer containing phosphorus and nitrogen, retain pyrolysis products in the condensed phase, and simultaneously inhibit the transfer of heat and oxygen. In addition, the PO· and PO 2 · free radicals produced by the decomposition of flame retardants can capture the active free radicals in the air, thereby interrupting the combustion reaction. Simultaneously, non-flammable gases, such as N 2 and NH 3 were released, which diluted the concentration of combustible volatiles and oxygen and enhanced the gas phase flame-retardant effect. Furthermore, EP/DDM/PNIM-10 exhibited excellent mechanical properties, with tensile strength and impact strength increasing by 33.1% and 131.4%. In general, this work provides an approach to developing a phosphonitrile flame retardant with broad applications in high-performance EP.
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ACS Applied Materials & Interfaces
·
2024
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IF 8.3
Zhiqian Meng,Xiuyu Liu,Lin Zhou,Xinyi Wang,Qin Huang,Guoning Chen,Shuangfei Wang,Yan Jiang
The on-demand regulation of cell wall microstructures is crucial for developing wood as a functional building material for energy management and conversion. Here, a novel strategy based on reactive deep eutectic solvent is developed to one-step in situ fibrillate wood via disrupting the hydrogen bonding networks in cell walls and simultaneously carboxylating wood components, without significantly altering the native hierarchical structures of wood. Benefiting from its distinctive cell wall structure composed of individualized yet well-organized lignocellulose nanofibrils, in situ fibrillated wood exhibits a prominent mesoporous structure with a specific surface area of 81 m2/g. It represents a robust sponge material (5 MPa at 80% strain) with excellent durability. Due to the enhanced compressibility and charge polarization capacity, the in situ fibrillated wood (10 × 11 × 12 mm3) can generate a piezoelectric output voltage of up to 2 V under 221 kPa stress. The favorable microstructural characteristics render in situ fibrillated wood with highly thermal-insulating properties, high solar reflectivity, and mid-infrared emissivity, favoring outdoor passive cooling effects with a subambient temperature drop of 6 °C. Combining its controllable, durable, and eco-friendly attributes, our developed wood sponge represents a versatile structural material suitable for indoor/outdoor energy-saving applications.
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危险品化学品经营许可证（带存储）