CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Wenqing Li,Shimin Zhang,Songchao Shi,Xiaoying Cheng,Chongwei An,Jingyu Wang,Baoyun Ye
Realizing the balance between high energy density and multifunctionality of energetic materials is a hot spot in current research, and its study is of great significance for the application of energetic materials. Regulating microstructure is widely recognized as an effective strategy for solving such problems. In this paper, four different microstructures of Hexanitrohexaazaisowurtzitane(CL-20)/1,1-diamino-2,2-dinitroethylene(FOX-7) composite microspheres, namely, hollow, porous irregular microspheres, porous microspheres, and layered porous microspheres, were prepared by microchannel recrystallization technology. The effects of crystal precipitation rate, binder mechanical properties, and purity of water phase on the microstructure of composite microspheres were systematically investigated. The four prepared samples were spherical particles with regular morphology and uniform particle size. The angle of repose and mechanical sensitivity tests showed that the CL-20/FOX-7 composite microspheres had good dispersibility and mechanical sensitivity. Ignition experiments show that hollow microspheres have the best energy release efficiency, while porous microspheres have higher energy density and more stable energy release efficiency. The results show that the combustion performance and safety of the composite microspheres can be effectively enhanced by adjusting the microstructure. Microchannel recrystallization technology can realize the controllable preparation of the microstructure of composite microspheres, which provides a reference for the design and preparation of other composite microspheres.
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高影响因子
POWDER TECHNOLOGY
·
2025
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IF 4.6
Wenyu Wu,Wenjie Liu,Meijie Li,Penglin Kang,Dongqian Fan,Xiaodong Li,Shuangqi Hu
Regulating the structure of energetic materials to enhance safety performance has become a hot topic for researchers in recent years. This study prepared spherical co-aggregated CL-20/HMX with controllable microstructure using a combination of microfluidic and self-assembly strategies within a modular micro-reaction system. The morphology and agglomeration structures of CL-20/HMX particles were investigated with different mixing plates, solvent/nonsolvent flow rate ratio, and solvent content. Spherical co-aggregated CL-20/HMX co-crystals were prepared under optimized conditions, and the formation mechanism was analyzed. The impact of the spherical aggregation structure on the thermal properties and mechanical sensitivity was thoroughly studied. The results indicate that the spherical co-aggregated CL-20/HMX was assembled from lamellar nanoparticles, controlling CL-20 crystal morphology at the molecular level. CL-20/HMX co-aggregated microspheres exhibit higher mechanical safety and thermal stability than conventional reaction samples and physical mixing samples. Combining spherical aggregation structures and a microfluidic approach enhances thermal decomposition stability and improves safety. This research offers a novel strategy for developing and fabricating other energetic materials.
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Journal of Environmental Chemical Engineering
·
2025
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IF 7.2
Yubing Cao,Ruitong Gao,Junwei Lei,Yuandong Hou,Min Xu,Shuang Cao,Zhaojun Chen,Yajing Duan,Hui Du
Pyrolysis presents a promising pathway for the chemical recycling of waste plastics. However, the pyrolysis of chlorine-containing plastics can generate hazardous chlorinated compounds. Therefore, it is critical to investigate the migration, transformation, and removal of chlorine during pyrolysis to enable environmentally sustainable recycling. In this study, we combined kinetic analysis with in-situ FTIR and TG-FTIR-MS to elucidate the mechanisms of chlorine migration and transformation during the pyrolysis of chlorinated mixed plastics (CMPs). An efficient dechlorination process using calcium-based additives was also developed. The results indicate that the pyrolysis of CMPs occurs in two distinct stages (Stage Ⅰ and Stage Ⅱ), with average apparent activation energies (Ea) of 166.69 kJ/mol and 243.86 kJ/mol, respectively. The process followed mechanism functions involving diffusion, nucleation, and phase boundary reactions. Initially, weak C–Cl and C–H bonds ruptured preferentially, releasing HCl. This was followed by synergistic cleavage of the main C–C chains, generating radicals such as methyl (·CH₃), butyl (·C₄H₉), propylene (·C₃H₅), and phenyl (·C₆H₅). The combination of these radicals with free chlorine radicals (·Cl) resulted in the formation of diverse and complex chlorinated organic compounds. For dechlorination, Ca(OH)₂ was identified as the optimal calcium-based additive, achieving a chlorine removal efficiency of 97.75 %, attributed to its self-decomposition behavior. This study clarifies the transformation pathways of chlorinated pollutants during pyrolysis and proposes a practical calcium-based dechlorination strategy to support sustainable chlorine management in the valorization of plastic waste.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Jiahui Li,Fulin Li,Yunzheng Li,Yuqing Wan,Xingran Xu,Xiang Zou
[diOTMG]Cl@Zr-bptc porous liquid (PL) was successfully prepared. • PL enhanced succinic acid yield 8.71-fold compared to organic amine. • 99.98% pure succinic acid was obtained by PL extraction and crystallization. • Carboxylic acids are separated via affinity and molecular size differences. Global environmental deterioration and plastic pollution drive the demand for biodegradable polymers, which rely on ultrapure monomer, such as succinic acid (SA). However, current bio-SA purification suffers from low purity (94–98%) and complex multistep processes due to similar affinity of homologues. Here, we introduce a type III porous liquid (PL) composed of ionic liquid [diOTMG]Cl and metal-organic framework Zr-bptc for SA purification, achieving 99.98 ± 0.01 wt% SA purity with 84.15% yield after crystallization. This represents an 8.71-fold yield increase in yield and 6.55-fold improvement in selectivity over tri-n-octylamine. Laboratory-scale assessment confirms the PL solution as a sustainable process. Mechanistically, carboxylic acids are extracted synergistically through hydrogen bonding/anion exchange, while Grand Canonical Monte Carlo (GCMC) simulations showed selective adsorption of acetic acid in Zr-bptc pores. Weak interactions and kinetic size sieving ensure high SA purity. This PL provides an efficient solution for producing polymer-grade monomers, addressing the long-standing challenge in fermented homologue separation. Download: Download high-res image (122KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Huanfeng He,Xin Li,Muhammad Fahim,Sai Liu,Irum Firdous,Tsz Chung Ho,Chi Yan Tso
Systematic Br/Cl doping in 2D perovskite TMPI establishes a detailed composition-property database. • Optimal Cl doping (I: Cl = 4:1) enhances solar modulation ability ( Δτsol ) to 27.7%. • Br doping effectively reduces the transition temperature of 2D perovskite to near 40 °C for practical use. • First-principles calculations reveal that water adsorption energy governs transition properties. Buildings account for a large portion of global energy consumption, driving the need for smart windows that can dynamically regulate solar heat. Two-dimensional (2D) thermochromic perovskites offer promising stability, but their practical application is limited by high transition temperatures and modest solar modulation ability. Here, we employ halide engineering via systematic Br/Cl doping in the 2D perovskite Tha 2 MAPbI 4 (TMPI) to optimize these key properties. A systematic Br/Cl doping was conducted in TMPI and established a detailed composition-property database. It is found that optimal Cl doping (I: Cl = 4:1) enhances the solar modulation ability ( Δτ sol ) to 27.7%, while Br doping effectively lowers the transition temperature to near 40 °C. Most importantly, a High-Resolution Transmission Electron Microscope (HRTEM) was employed to characterize the crystallization of 2D perovskites with different halogen dopants, providing the first atomic-scale observation of lattice fringes and SAED patterns in thermochromic metal halide perovskites and revealing the doping-dependent crystallinity evolution. Moreover, first-principles calculations reveal that enhanced water adsorption energy on doped perovskite surfaces governs the reduced transition temperature and faster response kinetics. A real-world model house demonstration confirms the superior cooling performance of the optimized smart window. This work provides not only high-performance material candidates but also a fundamental mechanistic framework for developing energy-efficient, responsive smart windows.
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ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Yuxin Gong,Mengyu Fu,Yingmin Jin,Yumeng Li,Ruifan Lin,Yong Zhang,Lei Lei,Ying Zhang,Changsong Dai,Yueping Xiong
Halide solid-state electrolytes (HSSEs), exemplified by low-cost Li 2 ZrCl 6 , exhibit high ionic conductivity and a wide electrochemical stability window, making them promising for all-solid-state batteries (ASSBs). Yet, optimizing HSSEs by elemental doping is either inefficient or costly, necessitating alternative approaches. Inspired by the filler-modified LiI-Al 2 O 3 system with fast-conductive interfacial percolation layer (IPL) and with regard to the underlying insufficient interfacial filler/electrolyte contact with Li 2 ZrCl 6 matrix, which hinders the IPL formation, the use of transition metal oxide Fe 2 O 3 is pioneered as a filler to generate oxygen vacancies and foster benign filler/electrolyte interfaces. At the Fe 2 O 3 /electrolyte interface, synchrotron X-ray adsorption spectra and electron energy loss spectra mapping reveal a distinctive O-Cl exchange reaction and improved interfacial contact. Density function theory, bond-valence site energy calculations, and finite-element simulations validate improved Li + migration via mitigated electrostatic confinement, reduced migration energy barriers, and spatially confined electric-field-accelerated IPLs. Benefiting from these merits, the ionic conductivity of the composite electrolyte surges from 0.4 to 2.15 mS cm −1 , with Li + migration activation energy reduced to 0.28 eV. Paired with the NCM811 cathode, the ASSB delivers 90% capacity retention over 1000 cycles at 0.5 C. This work offers a novel, cost-effective strategy for high-performance halide-oxide composite electrolytes from the counterintuitive perspective of nanofiller integration.
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高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Junyuan Shi,Jun Wu,Yunkai Zhang,Jingqi Wang,Siting Peng,Wendi Xiao,Yafei Hou,Da Chen
Dual-excitation N, Cl-CDs are synthesized for ratiometric RIF sensing. • Ratiometric detection of RIF is achieved with a detection limit of 58 nM. • The sensing mechanism involves synergistic IFE and FRET. • A smartphone integrated finger-actuated microfluidic device enables on-site visual RIF detection. • The platform exhibits satisfactory recovery in aquatic product samples. The increasing environmental prevalence of the antibiotic rifampicin (RIF) poses potential hazards to public health and ecological stability. Herein, a novel ratiometric assay is established by utilizing the dual-excitation nitrogen and chlorine co-doped carbon dots (N, Cl-CDs) for the quantification of trace amounts of RIF. Benefiting from the synergistic effects of the inner filter effect and Förster resonance energy transfer, the N, Cl-CDs act as a sensitive nanoprobe for RIF detection over a concentration range of 0.058–35 μM, with a detection limit of 58 nM. Furthermore, a novel finger-actuated microfluidic sensing platform has been developed through the integration of N, Cl-CDs. By combining the dual-excitation property of the probe with a smartphone-based RGB readout, the platform achieves on-site and visual quantification of RIF in real samples, as validated by high recovery rates ranging from 98.8% to 101.0%. Therefore, this work offers an innovative strategy for RIF sensing and establishes a versatile platform boasting prominent prospects for on-site food safety monitoring. Download: Download high-res image (150KB) Download: Download full-size image
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Journal of Physical Chemistry C
·
2023
·
IF 3.7
Xiu-Ni Hua,Zhuoer Cai,Xian Shi,Yuna Duan,Xiang Zhang,Jian Chen,Hai-Bao Duan
Significant attention has been dovoted to the organic–inorganic hybrid perovskites in the realm of scientific research arising from their distinctive optical and dielectric properties along with structural tunability, rendering them highly versatile and adaptable materials. Herein, two novel one-dimensional organic–inorganic hybrid perovskites of (4-MPD)MnX3 (4-MPD = 4-methylpiperidinium, X = Cl (1), X = Br (2)) were synthesized and demonstrated to, respectively, undergo reversible phase transitions at 376 and 368 K, characterized by differential scanning calorimetry and dielectric measurements. It is instresting to note that the replacement of Br by the Cl halogen atom has maintained the crsytal structures but devoted a slight increase in phase transition temperature. Variable-temperature structural analyses signify that the order–disorder change of 4-MPD cations acts as the driving force for such phase transitions from the Pnma to P1̅ space group. In addition, compounds 1 and 2 both emit strong red photoluminescence under UV excitation. The two compounds with high-temperature dielectric switching and photoluminescent properties will offer fresh insights for the design and investigation of novel multifunctional organic–inorganic hybrid perovskites.
研究领域:
材料科学
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无机化学
·
光电子学
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介电材料
·
钙钛矿研究
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高影响因子
JOURNAL OF LUMINESCENCE
·
2019
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IF 2.961
Yanchun Yang,Song Wei,Xiaojiao Kang,O. Tegus,Daocheng Pan
Employing the short-chain C 4 H 9 NH 3 X (X = Cl, Br, I) compound as the unique capping agent, highly quality CH 3 NH 3 PbX 3 (X = Cl, Br, I) perovskite quantum dots can be synthesized at room temperature in the open air, which possess high photoluminescence quantum yields and tunable emission in the range of 440–660 nm. Besides, C 4 H 9 NH 3 Br can also improve the morphology of CH 3 NH 3 PbBr 3 thin films by spin-coating the N, N -dimerthylformamide solution of CH 3 NH 3 Br, C 4 H 9 NH 3 Br and PbBr 2 , making the thin film dense and compact, and improving its optical properties .
研究领域:
材料科学
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纳米科技
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光电功能材料
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半导体物理
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凝聚态物理
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Laser & Photonics Reviews
·
2023
·Vol. 17
·期 5
·2200749
·
IF 11
Jinxing Zhao,Lijin Wang,Peiwen Lv,Fenghe Wang,Xu Li,Song Chen,Lei Qian,Aiwei Tang
Although cadmium (Cd)-based nanocrystals have enabled high-performance quantum-dot light-emitting diodes (QLEDs), their mass production is likely to be affected by environmental protection policies. Among all the potential Cd-free candidates, Cu-In-Zn-S (CIZS) nanocrystals (NCs) have attracted particular interests. Still, the performance of the corresponding LED is currently limited by imbalanced charge injection and luminescence quenching, which are both related to the ZnO-based electron transporting layer (ETL). This work demonstrates that ZnO nanoparticles (NPs) doped with Sn, Mg (Zn 1− x − y Sn x Mg y O), and passivated with Cl are promising to resolve the above issues. All-solution-processed QLEDs based on Cd-free CIZS NCs are fabricated by using Zn 0.9 Sn 0.1 O NPs as the ETL, and the peak external quantum efficiency (EQE max ) was nearly twice that of ZnO (EQE max = 1.74%). The main reason is that the incorporation of Sn can reduce the conductivity of ZnO by an order of magnitude. Combining the advantages of Zn 0.9 Sn 0.1 O, Zn 0.8 Sn 0.1 Mg 0.1 O@Cl NPs are designed by the co-doping of Mg and Cl passivation. The EQE max and current efficiency based on Zn 0.8 Sn 0.1 Mg 0.1 O and Zn 0.8 Sn 0.1 Mg 0.1 O@Cl as ETLs are further increased to 4.84%, 14.00 cd A −1 and 5.53%, 15.99 cd A −1 , respectively. The positive effects of Mg ions can remarkably optimize energy level structure to balance charge injection, while Cl can further passivate defects. The findings offer a new guideline for developing Cd-free light-emitting diodes.
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高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 53
·期 1
·136-147
·
IF 4
Hao Gao,Minghui Zhang,Zicong Xu,Yichuan Chen,Yuehui Hu,Zhijie Yi,Jiayu Huang,Hua Zhu
Due to the hydrophilicity and black-phase instability of FA perovskites, ambient humidity is an unavoidable issue in the processing of perovskite solar cells (PSCs). MACl is among the most popular additives for improving perovskite films, but our experiments confirm that the direct addition of MACl into the precursor solution deteriorates the stability of the final α-FAPbI3 films in humid air, which is attributed to the unwanted pinholes induced by MACl volatilization. To solve this problem, a novel confined-space annealing strategy (CSA) is intentionally developed to control the amount of MACl at a low level. Through retarding the volatilization of MACl and blocking moisture ingress, dense and δ-phase-free FAPbI3 films with excellent crystallinity and stability are achieved at 100 °C under high humidity (RH: 60 ± 10%). We further compare the same amounts of MAI and FACl additives with MACl, discovering that only when MA and Cl work together can pure α-FAPbI3 films be obtained; therefore, a mechanism of MA-assisted nucleation and Cl-induced diffusion recrystallization is inferred. As a result, the PSCs employing optimal films yield a champion power conversion efficiency (PCE) of 17.27% and retain over 90% of the initial PCE after exposure to high humidity for 480 h. Our results offer deep insights into the thermodynamic and kinetic behaviors of MA and Cl in film growth and are beneficial for air-processed FA-based PSCs for commercial application.
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PubMed
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 27
·16805-16813
·
IF 3.361
Qinhong Yin,Mengtao Wang,Dong Fang,Yanqin Zhu,Lihua Yang
In the present study, new N,Cl co-doped carbon dots (N,Cl-CDs) based on deep eutectic solvent (DES) were fabricated by a facile hydrothermal process. This fluorescent probe exhibited a good quantum yield of 14% and was applied for the sensitive and selective quantification of morphine in foods. In addition, the influence of solution pH, interaction time, system temperature, interfering substances and analogues on the determination was also investigated. Under the optimized conditions, the luminescence intensity of carbon dots increased linearly with the addition of morphine in the concentration range of (0.15–280.25) μg mL−1 (R2 > 0.9969) and the limit of detection (LOD) of 46.5 ng mL−1. Based on these results, it is suggested that N,Cl-CDs is a promising fluorescent probe for sensitive and selective quantification of morphine in foods.
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高影响因子
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