Journal of Applied Spectroscopy
·
2025
·
IF 1
Han Dan,Niu Xiaoxue,Wang Jing,Yan Zihong
Zr and Cl double-doped carbon dots (Zr/Cl-CDs) were prepared by a one-step hydrothermal method using citric acid, urea, and ZrCl 4 as precursors. Zr/Cl-CDs were characterized by ultra-violet-visible spectroscopy (UV-Vis), transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy (XPS). Experimental analysis revealed that the average size of Zr/Cl-CDs was 2–3 nm, while XPS analysis revealed the presence of C–Cl and Zr–O bonds. The fluorescence quantum yield of the final CDs was 17.5% at the excitation of 360 nm. In addition, Zr/Cl-CDs exhibited excellent performance in the detection of rutin with a concentration of 30–110 and 100–160 μmol/L, respectively. Linear correlation coefficients (R 2 ) were 0.9931 and 0.9962. The underlying mechanism was that rutin had an excellent quenching effect on the emission of the Zr/Cl-CDs as the fluorescence intensity exhibited a good linear relationship between rutin concentration and fluorescence intensity. These findings provide a new strategy for synthesizing double-doped CDs for rutin detection.
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高影响因子
LUMINESCENCE
·
2022
·Vol. 37
·期 11
·1873-1880
·
IF 2.613
Ping Yang,Wei Sun,Zikuan Zhang,Honglong Xing
As a type of nonmetals fluorescent reagent, the described chlorine phenol–formaldehyde resin (Cl–PFR) nanoparticles (NPs) were synthesized using a facile method. The as-synthesized Cl–PFR NPs can emit strong green fluorescence emission under 365 nm ultraviolet (UV) light irradiation. As mesoporous silica (MSN) NPs have a large specific area, strong adsorption, and uniform dispersion, MSN-coated Cl–PFR composites were prepared by mixing Cl–PFR and MSN NPs together. The as-synthesized multifunctional composites combining the advantages of the green fluorescence of Cl–PFR, and the strong adhesion of MSN was applied to detect potential fingerprints. Different base fingerprints (glass, paper, aluminium sheets, rough stones, tape) could be clearly observed in the presence of the Cl–PFR@MSN–NH 2 composites. Furthermore, fingerprints that had been aged for 3 months and washed with water several times could also be clearly displayed using the multifunctional composites. This study provided a simple, economical, and nontoxic fluorescent reagent for application in fingerprint detection.
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高影响因子
Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 22
·5908-5915
·
IF 5.976
Gaoliang Fang,Daqin Chen,Su Zhou,Xiao Chen,Lei Lei,Jiasong Zhong,Zhenguo Ji
Successful development of all-inorganic CsPbX3 (X = Cl, Br, or I) perovskite quantum dots (PQDs) has been witnessed due to their unique optical and electrical properties. However, the heavy usage of Pb element in PQDs has limited the commercial application of these PQDs, and the preparation of low-Pb or Pb-free PQDs is imperative. In this study, we report room-temperature reverse synthesis of CsPbxMn1−xCl3 PDQs from CsMnCl3 precursor nanocrystals through cation exchange. Interestingly, two-step phase transformation processes from hexagonal CsMnCl3 to rhombohedral Cs4PbxMn1−xCl6 and finally to cubic CsPbxMn1−xCl3 are evidenced. With an increase in the reaction time, Mn2+ ions in the PQD lattice are gradually replaced by Pb2+ ions. Notably, Mn2+ d → d broadband luminescence is not detected for the Cs4PbxMn1−xCl6 product, but it is intense for the CsPbxMn1−xCl3 sample owing to efficient energy transfer from CsPbCl3 to Mn2+. Moreover, it is found that the introduction of Br− into the reaction system will prohibit the complete phase transformation from rhombohedral Cs4PbxMn1−x(Cl/Br)6 to cubic CsPbxMn1−x(Cl/Br)3. By controlling the ratio between the CsMnCl3 precursor and PbBr2, tunable luminescence is easily achieved due to the combined emissions from both CsPb(Cl/Br)3 PQDs and Mn2+-emitting centers.
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高影响因子
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 4
·1849-1861
·
IF 3.5
Haodi Dong,Changcheng Liu,Que Huang,Yanjun Chen
Nowadays, the poor conductivity and unstable structure have become obstacles for the popularization of Na3V2(PO4)3 (NVP). In the current work, a dual-modified Mn0.1Cl0.3-NVP composite doped with Mn and Cl is prepared by a facile sol–gel method. When Mn2+ with a large ionic radius replaces small V3+, it can improve the stability of the NVP crystal structure. In addition, the replacement of V3+ by Mn2+ in a low valence state can generate redundant hole carriers, which is conducive to the rapid transport of electrons. The substitution of PO43− by Cl−, which is more electronegative, can reduce the impedance and facilitate the movement of Na+. Owing to the synergistic effect of Mn and Cl co-substitution, the structural stability of NVP was systematically enhanced, and the electron transfer and ion diffusion were effectively improved. Consequently, the optimized Mn0.1Cl0.3-NVP sample demonstrated superior electrochemical performance and kinetic properties. It exhibited a high reversible capacity of 109.2 mA h g−1 at 0.1C. Even at 15 and 30C, high discharge capacities of 70.3 mA h g−1 and 68.2 mA h g−1 were observed after 2000 cycles with capacity retention above 80%. Moreover, it delivered remarkable capacities of 77.1 and 73.4 mA h g−1 at 100 and 200C with retained capacity values of 50.3 and 47 mA h g−1, respectively, after 2000 cycles. Furthermore, the assembled Mn0.1Cl0.3-NVP//HC full cell delivered a high value of 94.7 mA h g−1 and lit LED bulbs, indicating its excellent application potential.
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高影响因子
FOOD CHEMISTRY
·
2020
·
IF 6.306
Yaoping Hu,Zhijin Gao,Junfei Luo
Facile detection of malachite green (MG), a toxic dye, in aquaculture is urgently demanded for environment and food safety. Herein, we design a novel fluorescent probe, namely red emissive Se,N,Cl-doped carbon dots (CDs), to accurately determinate MG. CDs are prepared by hydrothermal treatment of selenourea and o-phenylenediamine in HCl solution. This material exhibits excitation-independent dual emissions at 625 and 679 nm, with a high quantum yield of 23.6%. A selective and sensitive fluorescent sensor toward MG is established based on inner filter effect, because both the excitation and emission light of CDs can be strongly absorbed by MG. The fluorescence quenching of CDs is linear to the MG concentration over the range of 0.07–2.50 μM with a low detection limit of 21 nM. Trace-level analysis of MG in fish tissue is successfully explored, demonstrating the great potential of the proposed sensor for MG monitoring in aquatic products.
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DOI
PubMed
高影响因子
POWDER TECHNOLOGY
·
2025
·
IF 4.6
Wenqing Li,Shimin Zhang,Songchao Shi,Xin Ruan,Qian Yang,Baoyun Ye,Chongwei An,Jingyu Wang
The proportion of oxidizer in the formulation of composite solid propellants (CSPs) is often more than 50 %. It is very important to explore the preparation of new high-energy oxidizers to improve the energy performance of CSPs. Porous CL-20/FOX-7@AP composite microspheres were prepared by combining high-energy density CL-20 and high safety FOX-7 with traditional oxidant AP through microchannel recrystallization technology coupled with solvent evaporation induced self-assembly technology. The experimental results show that the morphology of porous CL-20/FOX-7@AP composite microspheres is regular, and AP is uniformly attached to the surface of porous CL-20/FOX-7 composite microspheres. Compared with CL-20/FOX-7 composite microspheres, the oxygen balance of CL-20/FOX-7@AP increased from −14.12 % to −8.47 %, and the minimum impact excitation energy of CL-20/FOX-7@AP-1 and CL-20/FOX-7@AP-2 increased by 2.25 J and 3.25 J, respectively. When CL-20/FOX-7@AP-1 and CL-20/FOX-7@ AP-2 were used as new oxidants to replace 10 % AP in CSPs formula, the burning rate increased by 21.52 % and 27.85 % respectively, and the pressurization rate increased by 69.79 % and 75.44 % respectively. CL-20/FOX-7@AP composite microspheres with a porous synergistic core-shell structure are expected to be used as novel high-energy oxidants in CSPs to improve the energy density and energy release efficiency of CSPs.
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高影响因子
ENVIRONMENTAL RESEARCH
·
2022
·
IF 8.431
Sen Lu,Xuechuan Li,Yunkai Liao,Guan Zhang
Efficient removal of low-concentration ammonia from chlorinated wastewater is a challenge for decentralized wastewater treatment due to its notorious environmental effect and lethal influence on aquaculture. Photoelectrocatalytic (PEC) oxidation process is considered as an efficient and environment–friendly approach, whereas a low-cost and stable photoanode is crucial. In this study, TiO 2 nanotubes (TNTs) photoanode (Ar–TNT–500 °C) with excellent physicochemical and photoelectrochemical properties was prepared by optimizing the parameters of anodization, including the voltage/times of anodization and the atmosphere/temperature of heat treatment. During the synthesis, the electrochemical and heat treatment processes promoted the formation of oxygen vacancies (O V ) on the TNTs surface and enhanced its electrocatalytic activity. The optimized Ar–TNT–500 °C photoanode could selectively convert ammonia to N 2 (86%) and a small amount of nitrate (14%). Radical quenching and probe experiments confirmed that the ClO produced by rapid quenching of OH and Cl by free chlorine dominated the selective degradation of ammonia in the synergistic process of photocatalysis and electrocatalysis. The cycle of chlorine-based radicals (ClO and Cl ) and Cl − provided a continuous and efficient ammonia oxidation system, because chlorine-based radicals could efficiently and selectively oxidize ammonia and reduce the production of toxic (per) chlorate.
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PubMed
高影响因子
ACS Nano
·
2025
·
IF 16
Chenyu Ma,Xinru We,Wenting Feng,Guanzhong Ma,Jianhang Yang,Shuhao Fan,Yiming Sun,Han Wang,Zihui Liu,Junwei Han,Wei Lv,Debin Kong,Linjie Zhi
Rechargeable metal–chlorine (Li/Na–Cl2) batteries potentially have a high energy density, but the significant amount of electrolyte consumed to produce active metal chlorides for reversible chlorine conversion severely limits their real electrochemical performance. Herein, we use a cathode with precast metal chloride in the graphene layers as the initial active material to save the sacrificial electrolyte and deliver a fundamentally different start-up operation mode for metal–chlorine batteries. Furthermore, the metal chloride confined by the graphene layers achieves in situ confining conversion with gaseous chlorine during long cycling, causing substantially improved cathode kinetics in a lean electrolyte. With this cathode, both Li/Na–Cl2 batteries demonstrate higher capacity and prolonged cycling performance. Typically, the obtained Na–Cl2 batteries could deliver a high areal capacity (3 mAh cm–2) and stable life over 300 cycles under lean electrolyte conditions (20–60 μL). This work demonstrates the practical significance of utilizing a graphene interlayer to confine metal chloride as an initial active material for rechargeable alkali-metal-Cl2 batteries.
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DOI
PubMed
高影响因子
Scientific Reports
·
2022
·Vol. 12
·期 1
·1-10
·
IF 4.996
Tan Meina,Qin Yang,Wang Yiping,Zhang Fazhi,Lei Xiaodong
We propose a new Cu–Al dual-ion battery that aqueous solution composed of LiCl, CuCl and AlCl 3 (LiCuAl) is used as the electrolyte, CuS is used as the cathode of aqueous aluminum ion battery for the first time and copper foil is used as the anode. The assembled Cu–Al dual-ion battery yields a reversible capacity of 538 mA h/g at 200 mA/g, and exhibits longterm cycling stability of over 200 cycles with 88.6% capacity retention at 1000 mA/g. Above excellent performance is inseparable from the three components of LiCuAl electrolyte and electrode materials. The Al-storage mechanism of CuS is proposed that the S–S bond in CuS lattice interacts with aluminum ions during the aluminum storage process. In addition, the charging and discharging process does not cause irreversible damage to the S–S bond, thus Cu–Al dual-ion battery with CuS as cathode shows great cycle stability.
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2024
·
IF 4.1
Duanyang Wu,Shengnan Zhang,Jing Xu,Wei Cheng
Carbamazepine (CBZ) is a ubiquitous persistent micropollutant in water. This study evaluated the degradation of CBZ by UV/Chlorine process. The influencing factors, such as chlorine dosage, solution pH, and water matrix constituents (Cl − , HCO 3 – and NOM) on CBZ removal were systematically investigated. The reactive HO•, Cl• and ClO• species were mainly responsible for the degradation of CBZ, and their contributions determined by probes (Benzoic acid, Nitrobenzene and 1,4-Dimethoxybenzene) varied with pH. Theoretical quantum calculations involving a total of 79 transition states suggested that HO• attack CBZ by hydrogen atom transfer (HAT) and radical adduct formation (RAF) mechanisms, while Cl• and ClO• proceed mainly through HAT and RAF mechanism, respectively. The reaction rates between CBZ and free radicals were calculated by evaluating the energy barriers and transition states. Furthermore, the proposed formation pathways and reaction mechanisms of main hydroxylated products and chlorine substituted products were unequivocally authenticated by transition states calculations. Overall, this study combined experimental and computational approaches to provide an in-depth degradation mechanism of CBZ in UV/Chlorine process.
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2024
·
IF 2
Jie Li,Huan Zhou,Jie Yang,Cunbing Xu,Sifan Wang,Yifan Li,Jiangbo Chen
The solid–liquid phase equilibria of the Li+, Na+, Ca2+//Cl––H2O quaternary system at 298.15 and 323.15 K are studied via the isothermal solubility phase equilibrium method. The solubility data and liquid properties of density and pH are obtained. The phase diagrams of the quaternary systems, including the water free diagram, the water diagram, and the dry salt diagram, are plotted to show the phase regions, water content, and salting-in effect. NaCl occupies the largest phase region at both 298.15 and 323.15 K. One double salt LiCl·CaCl2·5H2O occurs at 298.15 K and builds up two invariant points; one incommensurate invariant point saturated by (NaCl, LiCl·H2O, LiCl·CaCl2·5H2O) and one commensurate invariant point saturated by (NaCl, CaCl2·4H2O, LiCl·CaCl2·5H2O), but at 323.15 K, no double salt forms. The salting-in effect that happened in ternary systems still occurs in the quaternary Li+, Na+, Ca2+// Cl––H2O system at both temperatures. NaCl saturated concentration increases with LiCl and CaCl2 contents and results in a very high total salt content at commensurate invariant points, e.g., they are 56.92 and 60.62% at 298.15 and 323.15 K, respectively.
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高影响因子
RSC Advances
·
2018
·Vol. 8
·期 4
·1940-1947
·
IF 2.936
Pengchao Wang,Bohua Dong,Zhenjie Cui,Rongjie Gao,Ge Su,Wei Wang,Lixin Cao
Metal-halide perovskite nanocrystals (NCs) are considered to be promising types of optoelectronic and photonic materials. The emission colors of the cesium lead halide perovskite (CsPbX3, X = Cl, Br, I) NCs depend on the joint influence of the emission peaks of the host and its dopant ions. Herein, we report a phosphine-free strategy to synthesize Mn-doped CsPb(Cl/Br)3 NCs to tune their optical properties in a wide color gamut. Colloidal Mn-doped CsPb(Cl/Br)3 NCs were synthesized by injecting Cs-oleate solution into the MnCl2 and PbBr2 precursor solution. The as-prepared Mn-doped CsPb(Cl/Br)3 NCs are highly crystalline and uniform sized nanocubes with two emission peaks, including the host emission around 450 nm and the Mn2+ dopant emission around 600 nm, which are sensitive to the MnCl2-to-PbBr2 molar feed ratio and the reaction temperature. By varying the MnCl2-to-PbBr2 molar feed ratio or the reaction temperature, the relative PL intensities of dual color emission can be manipulated, showing their ability in tunable color output.
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高影响因子
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