LUMINESCENCE
·
2025
·Vol. 40
·期 4
·e70175
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IF 3
Jiaoyan Xie,Suqin Han
Folic acid (FA) is a crucial B vitamin for cell formation and maintenance, and its deficiency can lead to severe health disorders, highlighting the importance for accurate FA detection. Chemiluminescence (CL) provides a highly sensitive analytical approach, characterized by simple instrumentation, high accuracy, and low background interference. However, traditional CL techniques are often limited by weak signal intensity and poor robustness. This study presents a novel CL system using well-defined fluorescent Cl, S, N co-doped carbon dots (ClSN-CDs) integrated into the H 2 O 2 -KBrO 3 system. Under acidic conditions, the synergistic effect of H 2 O 2 and KBrO 3 induced ClSN-CDs to emit a strong CL signal, with the emitting species identified as excited-state ClSN-CDs. Trace amounts of FA significantly quenched the CL intensity of the ClSN-CDs-H 2 O 2 -KBrO 3 system, enabling rapid, sensitive, and selective FA detection. The system demonstrated a linear response to FA concentrations ranging from 0.02 to 1.0 μM, with a detection limit of 3.1 nM. Selectivity and recovery studies validated the system's robust analytical performance. Mechanistic investigations revealed that the CL reaction involved reactive oxygen species (ROS), and FA-mediated ROS consumption led to luminescence suppression.
研究领域:
分析化学
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营养学
·
食品科学
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DESALINATION
·
2025
·
IF 9.8
Hailin Chang,Shilei Fu,Ziao Zhang,Yating Hu,Zijian Cui,Jun Ma,Kexin Hou,Xiaobin Tang,Guibai Li,Heng Liang
Nanofiltration (NF) membranes with efficient selectivity are critical for addressing water source pollution from toxic heavy metals and emerging micropollutants. Herein, we engineered a polyamide (PA) NF membrane with ambidextrous selectivity by leveraging the concentration-driven effect of piperazine (PIP) during interfacial polymerization (IP). This PIP concentration-driven effect was verified by modulating the PIP concentration gradient from low to high, which enhanced IP efficiency via both an intensified alkaline reaction environment and concentration-driven diffusion. The optimized NF membrane features an ultrafine pore size distribution and reduced electronegativity, exhibiting a remarkable shift from sole SO 4 2− /Cl − selectivity to impressive ambidextrous selectivity, encompassing both SO 4 2− /Cl − (α ≈ 48, 98.3 % for Na 2 SO 4 ) and Mg 2+ /Na + (α ≈ 37, 98.2 % for MgCl 2 ). Moreover, it membrane also achieved exceptional removal efficiencies of 94.8–98.9 % for heavy metals and 77.6–99.3 % for antibiotics, while maintaining a water permeability of 19.3 L/m 2 h bar and mitigating the perm-selectivity trade-off. When purifying surface water containing heavy metals and antibiotics, the optimized NF membrane exhibited superior multi-pollutant removal and improved water production quality compared to the NF270 and NF90 membranes, and especially with its water permeance increased by ~27 % to 179 %. Our work uncovers a fundamental correlation between the PIP concentration, IP reaction, PA nanostructures and NF performance, providing valuable insights into customizing high-performance NF membranes to address complex water pollution challenges.
研究领域:
环境工程
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膜科学
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水处理
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高分子化学
·
纳米技术
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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
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无机化学
·
光电子学
·
介电材料
·
钙钛矿研究
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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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ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Qiao Yang,Xuhao Wu,Xuankai Huang,Shuang Liao,Kaijie Liang,Xueang Yu,Kuan Li,Chunyi Zhi,Haiyan Zhang,Na Li
Penetrating into the inner surface of porous metal-oxide nanostructures to encapsulate the conductive layer is an efficient but challenging route to exploit high-performance lithium-ion battery electrodes. Furthermore, if the bonding force on the interface between the core and shell was enhanced, the structure and cyclic performance of the electrodes will be greatly improved. Here, vertically aligned interpenetrating encapsulation composite nanoframeworks were assembled from Cl–/SO32–-codoped poly(3,4-ethylenedioxythiophene) (PEDOT) that interpenetrated and coated on porous Fe2O3 nanoframeworks (PEDOT-IE-Fe2O3) via a one-step Fe3+-induced in situ growth strategy. Compared with conventional wrapped structures and methods, the special PEDOT-IE-Fe2O3 encapsulation structure has many advantages. First, the codoped PEDOT shell ensures a high conductive network in the composites (100.6 S cm–1) and provides interpenetrating fast ion/electron transport pathways on the inner and outer surface of a single composite unit. Additionally, the pores inside offer void space to buffer the volume expansion of the nanoscale frameworks in cycling processes. In particular, the formation of Fe–S bonds on the organic–inorganic interface (between PEDOT shell and Fe2O3 core) enhances the structural stability and further extends the cell cycle life. The PEDOT-IE-Fe2O3 was applied as lithium-ion battery anodes, which exhibit excellent lithium storage capability and cycling stability. The capacity was as high as 1096 mA h g–1 at 0.05 A g–1, excellent rate capability, and a long and stable cycle process with a capacity retention of 89% (791 mA h g–1) after 1000 cycles (2 A g–1). We demonstrate a novel interpenetrating encapsulation structure to highly enhance the electrochemical performance of metal-oxide nanostructures, especially the cycling stability, and provide new insights for designing electrochemical energy storage materials.
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JOURNAL OF MOLECULAR LIQUIDS
·
2019
·
IF 4.561
Hengxin Fang,Zhixu Tang,Xinjuan Liu,Yongli Huang,Chang Q. Sun
It has been a long pursuit to discriminate the ionic roles of mono- and di-valent salt solutions in modulating the hydrogen bonding network and solution properties. We attended this issue by examining the effect of concentrated YX 2 (Y Mg, Ca, Sr; X Cl, Br) solvation on O:H O bonds transition from the mode of ordinary water to hydration in terms of the number fraction f YX2 ( C ) and the segmental O:H O bond phonon stiffness shift Δω(C) with C being the solute concentration. The invariant df Y ( C ) / dC at C ≤ <0.05 suggests that the small Y 2+ forms a constantly-sized hydration droplet with weak responding to interference of other ions because its hydrating H 2 O dipoles screen mostly its electric field. However, the number inadequacy of the highly-ordered hydrating H 2 O dipoles partially screens the large X − . The X − ↔ X − electrostatic repulsion weakens its electric field. The concentration-trend consistency of the f YX2 ( C ), the solution conductivity σ YX2 ( C ), and surface stress (contact angle) θ YX2 ( C ) for YX 2 solutions clarifies their common origin of ionic polarization. However, the Jones–Dale notion disobedience of the viscosity η YX2 ( C ) suggests the dominance of the inter-ion repulsion.
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APPLIED CATALYSIS A-GENERAL
·
2018
·
IF 4.521
Fengjiao Wang,Yuyao Gu,Zhenya Yang,Yanyu Xie,Jiangjie Zhang,Xiaotong Shang,Huibo Zhao,Zizhong Zhang,Xuxu Wang
We developed a simple X − -assisted (X = Cl, Br, I) one-pot hydrothermal reaction to successfully synthesize a series of BiOX/Bi 2 WO 6 heterojunction. The effect of different halogens and their addition amount on the photocatalytic performance of BiOX/Bi 2 WO 6 composites was investigated using benzyl alcohol selective oxidation under visible-light irradiation. All BiOX could enhance the photocatalytic activity of Bi 2 WO 6 , but the BiOBr was the optimum for the maximum improvement of Bi 2 WO 6 . The match of energy band structure between BiOX and Bi 2 WO 6 resulted in the highly efficient separation of photogenerated charges, which was mainly attributed to their fundamental distinction of the photocatalytic activity. This work clarified the essential distinction in photocatalytic performance of the different halogen of BiOX/Bi 2 WO 6 heterojunction, and also provided guidance for the construction of efficient heterojunction photocatalysts.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Chunpeng Bai,Jingce Bi,Junbiao Wu,Yan Xu,Sebastian Wohlrab,Yide Han,Xia Zhang
In this work, a series of Ag/AgX (X = Cl, Br, I)/g-C 3 N 4 (Ag/AgX/CN) composites were successfully fabricated by an in-situ solid phase method. The morphology and structure, photoluminescence and photoelectrochemical properties of composites were investigated in detail. The as-prepared Ag/AgX/CN composites were used as H 2 evolution photocatalysts under visible-light irradiation with a sacrificial agent . The experimental results revealed that Ag/AgI/CN-4 composite possesses highest-H 2 evolution rate (up to 59.22 μmol g −1 h −1 ) which are approximately 31 times higher than that of pure g-C 3 N 4 (1.94 μmol g −1 h −1 ). In addition, Ag/AgCl/CN-4 and Ag/AgBr/CN-4 composites also present high photocatalytic activities yielding, 26.39 and 18.05 μmol H2 g −1 h −1 , respectively. The enhanced photocatalytic activities of Ag/AgI/CN-4 composite might be attributed to the synergistic effect between Ag/AgI nanoparticles and g-C 3 N 4 and the localized surface plasmon resonance effect of metallic Ag. Moreover, Ag/AgI/CN-4 composite showed excellent recyclability and stability after five cycling photocatalytic tests (about 25 h). Furthermore, the possible photocatalytic mechanism of Ag/AgI/CN composites is proposed.
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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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