DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 19
·6551-6558
·
IF 4
Wenjuan Dong,Lu Wang,Rongrong Zhang,Chaochao Wen,Ren Su,Xiaojuan Gong,Wenting Liang
Carbon dots are popular luminescent materials because of their excellent fluorescence properties, but the low quantum yield limits their application. Heteroatom doping is a more convenient and popular approach to increase the quantum yield of carbon dots. Here, novel N,S,P heteroatom co-doped carbon dots (N,S,P-CDs) were synthesized by a simple one-step hydrothermal method using m-phenylenediamine, L-cysteine and phosphoric acid as raw materials. The as-prepared N,S,P-CDs showed excellent photoluminescence properties with a fluorescence quantum yield of up to 41%, which greatly encourages their application in fluorescence sensing. The N,S,P-CDs exhibited good fluorescence stability under salt solution, xenon lamp irradiation and ultraviolet lamp irradiation except for a high sensitivity to extreme acidity. The fluorescence intensity of the N,S,P-CDs can be decreased by as much as 85% when the pH of the solution changes from 2.50 to 4.75, that is, a small fluctuation in pH can cause an intense response of the fluorescence of the N,S,P-CDs. Therefore, an excellent fluorescence sensing platform for accurately monitoring the pH of extreme acidity has been constructed. In addition, the N,S,P-CDs can be applied for quantitative detection of folic acid based on the strong quenching effect of folic acid on the fluorescence of the N,S,P-CDs. Good linearity was obtained in the concentration range of 4.85–82.45 μM, with a detection limit of 0.148 μM. The constructed sensing platform was used for the determination of folic acid in actual samples of orange juice, oatmeal and tablets with satisfactory results.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2021
·Vol. 147
·期 15
·8145-8155
·
IF 4.626
Tao Lili,Xu Yue,Liu Lubin,Li Bin,Xu Miaojun
A novel mono-component P/N/B-containing intumescent flame retardant poly(methylphosphonic-boric acid piperazine neopentylgcol ester) named MBPNE was synthesized. The chemical structure of MBPNE was analyzed by FTIR, 13 C and 31 P solid-state NMR tests. The results of thermal gravimetric analysis indicated that MBPNE possessed excellent charring capability, and its residual char was 27.5 mass% at 800 °C. Besides, MBPNE occurred melting and expansion process during charring evolution process. MBPNE was used to prepare flame retardant polyolefin elastomer (POE) composites. The 1.6 mm POE/MBPNE specimens achieved UL-94 V-0 rating and their LOI value was 25.5% when 22 mass% MBPNE was incorporated. The sheet was extinguished quickly after departing the flame, and no dripping appeared. Furthermore, the incorporation of MBPNE effectively enhanced the residual char mass after cone calorimeter tests, and the heat release was suppressed. The compact, expanded, partially graphitized and coherent char layer was generated on POE composites surface during burning process and exerted isolation effect in condensed phase. Meanwhile, the degradation products of MBPNE quenched active free radicals in gaseous phase, which effectually interrupted the combustion chain reaction of POE composites. Consequently, the POE composites were endowed excellent flame retardant performance.
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Lei Wang,Xiaodong Liu,Peng Qi,Jun Sun,Shengling Jiang,Hongfei Li,Xiaoyu Gu,Sheng Zhang
The chitosan (CS) transparent film has attracted much attention in food and medicine packaging areas due to their biodegradability and good availability. A novel carbon quantum dots compound containing nitrogen and phosphorus (NP-CQDs) was obtained by reacting citric acids , with urea and phytic acids . The density of the film was increased, and the water vapor permeation was reduced by the presence of NP-CQDs. The introduction of 4 wt% NP-CQDs increased the water contact angle of the CS film from 79.2° to 105.8°. The shielding on UV-A and UV-B transmittance was increased with the NP-CQDs loading. The film containing 4 wt% NP-CQDs blocked more than 90.2% UV-A and 96.5% UV-B; however, it only blocked 26.8% visible light. It also exhibited better antibacterial activity to both E . coli and S . aureus than the control CS film. This work provided a feasible way to prepare multifunctional bio-safe film.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2021
·
IF 3.178
Yuechao Cao,Xuxing Wan,Wei Li,Jian Liu,Rongliang Liu,Songgu Wu
trans-p -Methoxycinnamic acid ( t -PMCA) is a cinnamic acid derivative with various pharmacological effects such as anti-colon cancer, antifungal, hepatoprotective, hypoglycemic, etc. In this paper, the solubilities of t -PMCA in 12 organic solvents were determined in the range of 283.15 K-323.15 K using gravimetric method. The solubility of t -PMCA increased with the increasing of temperature. Meanwhile, the experimental solubility data were verified and correlated using four thermodynamic models (Apelblat equation, λ h equation, Van’t Hoff equation and NRTL equation), and the relative standard deviations (ARD%) were all less than 7%. The simulated data agree well with those experimental data. In addition, the Hansen solubility parameter model and solvent properties were used to explain the dissolution behavior of t -PMCA in 12 organic solvents. The results showed that the dissolution behavior of t -PMCA was not determined by a single factor, but was the result of the comprehensive effect of various solubility parameters. In order to reveal the dissolution behavior of t -PMCA, the single-crystal structure of t -PMCA was analyzed, and molecular simulations (including Hirshfeld surface analysis, surface electrostatic potential, and radial distribution function) were performed, which showed that H ⋯ H and O ⋯ H contacts play a dominant role in the crystal arrangement and that there are hydrogen bonding interactions between t -PMCA and solvent molecules. Finally, the thermodynamic properties ( Δ mix G, Δ mix H, and Δ mix S ) of t -PMCA during the mixing process were calculated using the NRTL equation, and the results indicated that it is an entropy-driven spontaneous process.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Meiran Chen,Yumin Guo,Jungu Xu,Jingjing Wu,Xin Tang
The development of heterostructure electrolytes represents a promising strategy for enhancing the performance of solid oxide fuel cells for the intermediate-temperature solid oxide fuel cell (IT-SOFC). In this work, a p–n semiconductor ZnO-SNT heterostructured electrolyte based on p-type Sr2Nb1.9Ti0.1O7–δ (SNT) and n-type ZnO nanoparticles is proposed. In addition, its structural characterization and electrochemical performance are also investigated. Particular attention is paid to the effect of the commercial ZnO particle size on the electrical conductivity. It was revealed that the resulting ZnO-SNT electrolyte exhibited a desirable heterostructure and was enriched with oxygen vacancies. Electrochemical studies demonstrated that the 6ZnO-4SNT fuel cell achieved a peak power density of 570 mW cm–2 at 550 °C, with an open-circuit voltage of 1.06 V, and an ionic conductivity of 0.163 S cm–1. Meanwhile, such optimal cell performance was yielded at an average size of 30 nm for the ZnO, which indicated that the interfacial area plays a crucial role in the ionic conductivity of the ZnO-SNT composites. Further investigation of the rectification properties showed that there was a pronounced p–n rectification effect in the ZnO-SNT heterostructure. Building upon this finding, the band alignment effect was exploited to explain the electron-blocking and ion-promoting behavior of such p–n heterojunctions. Our findings not only show that ZnO-SNT nanocomposites are promising electrolytes but also provide insights into the development of effective IT-SOFC electrolytes utilizing semiconductor heterostructure materials.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Songtao Cai,Jinman Wu,Yaokun Mo,Yuxuan Dai,Peng Liu,Jianxin Luo,Chunyan Zhang,Yifei Liu,Jianjun Liu,Qingwen Zhang,Fuming Du,Yi Wang,Hu Chen
A two-pot method is reported for the synthesis of ferric oxide-gluconic acid/β-cyclodextrin (Fe 3 O 4 -GA@β-CD). The proposed approach is a green one as the raw material is a natural product (sucrose) and no organic solvent is involved. Meanwhile, this novel composite was demonstrated for catalytic degradation of p-nitrophenol (PNP), a prototype toxic with high toxicity and low degradability. This is realized by H 2 O 2 activation induced by the heterogeneous Fenton-like catalysis of the as-prepared Fe 3 O 4 -GA@β-CD nano-microspheres. The results showed that the reaction rate constants of PNP degradation catalyzed by Fe 3 O 4 -GA@β-CD and Fe 3 O 4 -GA were 0.0879 and 0.0514 min −1 , respectively, suggesting improved catalytic performance of Fe 3 O 4 -GA@β-CD compared with Fe 3 O 4 -GA. This can be attributed to the cavity of β-CD, which can capture and include PNP molecules. The effects of pH value, H 2 O 2 concentration, catalyst load and hydroxyl radical quenching on the Fenton-like catalysis were explored and the optimized conditions (pH value = 2.0, H 2 O 2 concentration = 50 mM, and catalyst load = 1.0 g/L) were determined. Additionally, Fe 3 O 4 -GA@β-CD exhibited excellent reusability (catalytic degradation rate = 95.1% after five recycling times) as it can be recycled under external magnetic field owing to its good magnetic response (up to 18.41 emu/g).
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Yingsha Wang,Qinghua Feng,Meili Liu,Liuheng Xue,Gang Wang,Shouting Zhang,Wenping Hu
Developing peroxidase-like sensors with excellent catalytic activity to construct colorimetric sensors has been an important challenge for a long time. The electronegativity of the doped nonmetallic atoms can change the chemical environment of the carbon material and promote the redistribution of electrons, thus improving the electron transfer channel between the nanozyme and the reaction substrate and further enhancing the peroxidase-like activity. Herein, a nitrogen (N), phosphorus (P), and sulfur (S) codoped carbon nanozyme (NPS-C) was successfully designed via one-step high-temperature pyrolysis. Compared with N-doped nanozymes (N–C), N and P codoped carbon nanozymes (NP-C) have a lower Michaelis–Menten constant, and N and S codoped carbon nanozymes (NS-C) have a higher reaction rate. Therefore, based on the synergy between different atoms, NPS-C exhibited excellent peroxidase-like activity and stronger substrate binding affinity, which effectively activated H2O2 to produce reactive oxygen intermediates with a stronger oxidation capacity and superoxide anion radical (•O2–) and promoted TMB to lose an electron and be oxidized to oxTMB. Moreover, ascorbic acid (AA), as an antioxidant model, can rapidly consume reactive oxygen species and reduce oxTMB. Therefore, based on the excellent peroxidase-like activity of NPS-C and the linear relationship between the concentration of AA and the inhibition degree of peroxidase-like activity, a colorimetric sensor can be constructed to analyze the total antioxidant capacity (TAC) in beverages.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2023
·
IF 3.3
Rui Zhang,Maoqin Xu,Junrong Yu,Ziyin Chen,Jiacheng Jiang,Jie He,Jingjing Hao
Water pollution has reached alarming levels due to the overuse of antibiotics, and photocatalysis is considered to be a green and efficient degradation technology for the treatment of water pollution caused by antibiotics. In this paper, a series of p-n heterojunction Bi 2 MoO 6 /Cu 2 O composite photocatalysts were synthesized by hydrothermal method . The samples were characterized by XRD, SEM, XPS, UV–Vis-DRS, PL , and EIS . The photocatalytic activities of the photocatalysts were analyzed based on the degradation of two antibiotics under visible light illumination. Results showed a removal rate of 88% and 94% for chlortetracycline (CTC) and tetracycline (TC), respectively. The corresponding first-order kinetic curves indicated that the reaction rates were 4.2 and 7.9 times higher than those of the Bi 2 MoO 6 and Cu 2 O monomers . The enhanced removal efficiency of antibiotics is ascribed to the improved light absorption and electron-hole pair transport channels, facilitated by the formation of p-n heterojunction within the catalyst. Further, a possible degradation mechanism was proposed. Finally, the intermediate products were analyzed using liquid chromatography-mass spectrometry (LC-MS), and a possible photocatalytic degradation pathway of CTC was proposed. Based on the present study and experimental observations, Bi 2 MoO 6 /Cu 2 O as a visible-light-driven photocatalyst is suggested to be a promising candidate for the removal of antibiotics.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Liang-Yu Wang,Zhi-Peng Cai,Chao Ma,Kai-Xue Wang,Jie-Sheng Chen
Metal–organic frameworks (MOFs) with well-defined porous structures and highly active frameworks are considered as promising electrode materials for sodium-ion batteries (SIBs). However, the structure pulverization upon sodiation/desodiation impacts on their practical application in SIBs. To address this issue, poly(p-phenylenediamine) (PPA) was uniformly coated onto the surface of MIL-88A, a typical Fe-based MOF through in situ polymerization initiated by the metal ions (Fe3+) of MIL-88A. Used as an anode material for SIBs, the PPA-coated MIL-88A, denoted as PPA@MIL-88A, showed significantly improved electrochemical performance. A reversible capacity as high as 230 mAh g–1 was achieved at 0.2 A g–1 even after 500 cycles. MIL-88A constructed with electrochemically active Fe3+ and fumaric acid ligands guarantees the high specific capacity, while the PPA polymer coating effectively inhibits the pulverization of MIL-88A. This work provides an efficient strategy for improving the structure and cycling stability of MOFs-based electrode materials.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Qi Wu,Huiling Guo,Huajun Sun,Xiaofang Liu,Huiting Sui,Fang Wang
Flexible piezoelectric energy harvesters (PEHs) have attracted extensive interest because of their ability to transform mechanical energy into electric power. Here, PEHs were fabricated using P(VDF-TrFE)-based piezoelectric composite films containing lead zirconate titanate (PZT) powder and –OH-functionalized graphene (HOG) nanosheets (HOG-P/P). Among all composites, a high open-circuit voltage ( V oc) of approximately 50 V p-p and a maximum power density of 1.4 μW/cm 2 were obtained from a HOG-P/P PEH with 0.10 wt% HOG nanosheets and 15 wt% PZT under bending–releasing mode. Moreover, the PEH exhibited a stable voltage output after 3000 bending–releasing cycles. In addition, the PEH harvested mechanical energy from human body movements and generated an output voltage and current of 60 V and 8 μA during the finger bending–releasing process, lighting up 30 commercial white LEDs. The enhanced piezoelectric performance can be attributed to the introduction of HOG nanosheets and PZT powder. This work provides an effective strategy for improving the output performance of P(VDF-TrFE)-based PEHs.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Mengdan Guan,Yameng Zhu,Xiaoping Yue,Yan Liang,Huixiang Sheng,Jin Wang,Chengyu Zhang,Qiming Peng,Gang Lu
The plasmon-mediated coupling reaction of nitroaromatic compounds is an effective strategy to synthesize the aromatic azo compounds that are widely applied in material science, pharmacy, and agricultural chemistry. Nonetheless, the reaction rate can be further improved since the lifetime of the plasmon-generated hot carriers is limited to femtoseconds or picoseconds. Herein, using in situ plasmon-enhanced Raman spectroscopy, we reveal that the adsorbed positively charged methyl violet molecules on the silver nanoparticle (Ag NP)–graphene oxide (GO) composite structure act as simple and cost-effective molecular cocatalysts, largely boosting the coupling of p-nitrothiophenol to p,p′-dimercaptoazobenzene. This boosting is attributed to the promoted separation of the plasmon-generated hot carriers at the Ag NP–GO interface. In addition, the reduction of laser power will help to promote the efficiency of the MV-induced acceleration. This work provides a highly simple, efficient, and cost-effective strategy to accelerate the coupling reaction of nitroaromatic compounds, and this strategy can be extended to the acceleration of many other plasmon-mediated chemical reactions.
✓ 已验证
产品关联
DOI
高影响因子
TOXICOLOGY LETTERS
·
2021
·
IF 4.374
Shanqi Guo,Yangyi Zhang,Shuo Wang,Tong Yang,Baojie Ma,Xiaojiang Li,Yizhuo Zhang,Xingkang Jiang
Antimony is a common environmental contaminant that causes biological toxicity in exposed populations worldwide. Previous studies have revealed that antimony promotes prostate cancer growth by stabilizing the c-Myc protein and mimicking androgen activity. However, the role of lncRNAs in the regulation of antimony-induced carcinogenesis remains unknown, and the precise mechanisms need to be explored. In the present study, we found that chronic exposure to antimony promoted cell growth and lipid metabolic disequilibrium in prostate cancer. Mechanistically, we identified a long noncoding RNA molecule, PCA3, that was substantially upregulated in LNCaP cells in response to long-term antimony exposure. Functional studies indicated that abnormal PCA3 expression modulated antimony-induced proliferation and cellular triglyceride and cholesterol levels. In addition, PCA3 levels were found to be inversely correlated with MIR-132-3 P levels by acting as a decoy for MIR-132-3P. Besides, SREBP1 directly interacted with MIR-132-3 P to increase cell growth and disrupt lipid metabolism by targeting its 3’UTR regions. Taken together, our results revealed that lncRNA PCA3 promotes antimony-induced lipid metabolic disorder in prostate cancer by targeting MIR-132-3 P/SREBP1 signaling.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）