Carbon Neutrality
·
2025
·Vol. 4
·期 1
·1-9
·
IF 12.5
Yang Delong,Dai Jinhang,Du Ziting,Cao Qingya,Chen Gang,Qi Ting,Wang Weilu,Li Fukun
Since 3-acetylamino-5-acetylfuran (3A5AF) has been regarded as a promising nitrogen-containing synthon, the conversion of renewable chitin and its monomer N-acetyl-D-glucosamine (NAG) to 3A5AF is of significance. In this paper, we compared the catalytic activity of several Cl-containing compounds and found that LiCl exhibited superior performance. The effects of solvent, catalyst dosage, reaction temperature, and reaction time on the synthesis of 3A5AF were investigated. Under the optimized conditions, about 60% yields of 3A5AF were obtained in N-methyl-2-pyrrolidone (NMP) or dimethylacetamide (DMA) medium. The spent LiCl and DMA could be recycled and reused, without obvious decrease of 3A5AF yield. Moreover, the formed 3A5AF could be purified by a facile procedure. Experiment results and density functional theory (DFT) calculations revealed that homogeneous Cl − was vital for 3A5AF formation. This study provides an example for the effective conversion of chitin biomass to value-added compounds.
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Inorganic Chemistry Frontiers
·
2024
·
IF 6.1
Feng Xu,Xiang Xu,Bingxuan Li,Ge Zhang,Chan Zheng,Jindong Chen,Ning Ye
Long-wave infrared (IR) nonlinear optical (NLO) crystals hold great promise for extensive applications. However, IR NLO crystals with outstanding comprehensive optical and NLO performances are still in great demand. Herein, two Hg-based chalcogenides, Hg3AsS4Cl and Hg3AsS4Br, are synthesized via a chemical vapor transport technique. Attributed to the synergistic combination of [HgS3] groups and structurally aligned [AsS3] groups with lone pair electrons, the two compounds exhibit superior NLO performance, encompassing strong second-harmonic generation (SHG) effects, tremendous birefringence, and a broad transparency range, positioning them as promising long-wave IR NLO materials. Moreover, the luminescent performances of the two compounds are also investigated, revealing interesting ultraviolet (UV) region luminescence emissions, broad emission bands, and large Stokes shifts for potential luminescent applications.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 36
·2307
·
IF 2.8
Zhang Huayushuo,Ma Qian,Gao Pan,Li Bolong,Yang Xiaoxia,Li Chao,Song Mingming,Hou Zhiwei,Jiang Xiaomei
X-ray detection has extensive applications in medical imaging, scientific research, and security inspection. Despite the superior radiation detection properties of lead-based perovskites, including high carrier mobility and superior attenuation efficiency, their toxicity and instability arising from ion migration hinders further development. To address these challenges, a series of halogen-tuned lead-free 3-methylpiperidine bismuth halides, (C 6 H 14 N) 3 Bi 2 I 9 , (C 6 H 14 N) 2 BiBr 5 and (C 6 H 14 N) 2 BiCl 5 (C 6 H 14 N = 3-methylpiperidine) single crystals were grown and systematically characterized. 3-methylpiperidine was selected for its steric effect stabilizing the lattice, and the synergistic tuning through halogen variation enabled a structural transition along with modulation of their properties. Notably, the lateral-structured (C 6 H 14 N) 3 Bi 2 I 9 single-crystal X-ray detector exhibits a sensitivity of 388.05 μC Gy −1 cm −2 , a low detection limit of 71.05 nGy s −1 , and a small dark current drift of 2.16 × 10 –8 nA cm −1 s −1 V −1 . Importantly, this material retains its original morphology after 8 months of storage in ambient conditions. Furthermore, flexible X-ray devices fabricated via spin-coating (C 6 H 14 N) 3 Bi 2 I 9 exhibited a favorable X-ray response with a sensitivity of 121.48 μC Gy −1 cm −2 , as well as excellent mechanical stability. This work reveals that halogen tuning effectively optimizes the structure and performance of Bi-based perovskites, providing valuable insights for advancing them in X-ray detection applications.
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JOURNAL OF LUMINESCENCE
·
2019
·
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
·
纳米科技
·
光电功能材料
·
半导体物理
·
凝聚态物理
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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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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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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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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
·
无机化学
·
光电子学
·
介电材料
·
钙钛矿研究
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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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JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 30
·17167-17177
·
IF 4.22
Gan Xiaoyan,Zhao Wenhui,Xu Tianye,Liang Yun,Guo Liling,Liu Hanxing
Two-dimensional (2D) organic–inorganic perovskite hybrid materials with enhanced stability have attracted wide attention in optoelectronic field in recent years. Efforts of exploring new 2D perovskites with various organic or inorganic components have been devoted to further improve their solar cell efficiencies. In this work, three structurally similar spacer cations of phenylethylammonium (PEA), 4-bromophenylethylammonium (BPEA) and 4-chlorophenylethylammonium (CPEA) are selected to prepare multilayered 2D perovskites. It is found that the introduction of halogen atoms in the organic cations positively influences the film quality, light absorption, charge transport, device performance and moisture stability of the resulting perovskites. The (BPEA) 2 (MA) 4 Pb 5 I 16 and (CPEA) 2 (MA) 4 Pb 5 I 16 perovskites exhibit efficiencies of 7.38% and 10.88%, respectively, which are much higher than that of (PEA) 2 (MA) 4 Pb 5 I 16 (3.98%). Owning to the larger size and bigger electronegativity of halogen atom in spacer cations, the PCE of unsealed BPEA- and CPEA-based 2D perovskite devices maintains 73% and 63% of their original efficiency after 720 h exposure to 60% humid air, while the PEA-based 2D device decreases to 52% of its initial PCE. Our work demonstrates new insight to modify the quality and stability of 2D perovskite hybrids, highlighting the validity of molecule design of organic cations in improving the efficiency and stability of 2D perovskite solar cells.
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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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PubMed
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