Journal of Materials Chemistry C
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2023
·Vol. 11
·期 38
·13106-13112
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IF 6.4
Mingquan Guo,Jiangnan Shu,Dexin Du,Yisha Wang,Hua Cui
Potential resolved electrochemiluminescence (ECL) nanoluminophores are very important for precise analysis and simultaneous determination of multiple targets. Designing ideal potential resolved ECL nanoluminophores, generating multiple high efficiency ECL emissions without overlap and interference of potential and wavelength, is a challenging subject. Herein, we developed a new nanoluminophore, meso-tetra (4-carboxyphenyl) porphine (TCPP)-functionalized chitosan/Ru(bpy)32+/SiO2 (CRuSiO2) (TCPP@CRuSiO2), with cathode and anode ECL emissions by modifying TCPP on the surface of CRuSiO2 nanoluminophores. The TCPP@CRuSiO2 nanoluminophores presented a uniform sphere morphology (∼50 nm). They exhibited two ECL emissions of 695 nm and 610 nm at −1.20 V and 1.15 V, respectively, by using K2S2O8 and tripropylamine (TPrA) as coreactants. Subsequently, the relevant ECL mechanisms are proposed. In the negative potential range, sulfate radicals (SO4˙−) reacted with TCPP−, generated by the electro-reduction of S2O42− and TCPP, to form the excited state TCPP*, resulting in ECL-1. In the positive potential range, Ru(bpy)33+ and TPrA˙, obtained by electro-oxidation of Ru(bpy)32+ and TPrA, reacted with each other to produce the excited state Ru(bpy)32+*, leading to ECL-2. The synthesized TCPP@CRuSiO2 possesses not only potential and wavelength resolved ECL emissions, but also the advantages of easy synthesis, high ECL efficiency, good stability, and easy film formation on the electrode surface. This work enriches ECL nanoluminophores, which are of important application potential in precise analysis and multiplex analysis.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2023
·
IF 6.1
Zizhe Li,Jinkui Wang,Youyi Wang,Qingyue Li,Xiaoyang Chen,Yu Wang,Haining Tian,Yexuan Mao,Lianjun Song,Xianqing Huang,Zhanhui Wang,Xiya Zhang
To avoid false-positive results in immunoassays due to cross-reactivity of antibodies with structural analogues, especially metabolites of target compounds, the preparation of highly specific antibodies is crucial. Preserving the characteristic structure of a target compound when designing a hapten is important when preparing highly specific antibodies. Here, we designed a novel hapten, 4-(((1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4yl)amino)methyl)benzoic acid, named AA-BA, to improve the specificity of antibodies for detection of 4-methylaminoantipyrine (MAA), a residual marker of dipyrone, an important antipyretic-analgesic and anti-inflammatory drug. The structural features of the hapten remained almost the same as those of MAA. After experimental validation, monoclonal antibody 6A4 (mAb 6A4) was prepared with the half maximal inhibitory concentration (IC50) value of 4.03 ng/mL and negligible cross-reactivity with dipyrone metabolites and other antibiotics. In addition, a specific lateral flow immunoassay (LFA) strip based on colloidal gold was developed for screening MAA with a cutoff value of 25 ng/mL in milk. The developed LFA is a useful tool for rapid and accurate detection of MAA.
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IMMUNOPHARMACOLOGY AND IMMUNOTOXICOLOGY
·
2023
·
IF 3.3
Shiling Hu,Jue Wang,Haoyun Bai,Chaohua Feng,Zhenqi Zhou,Zhuoyin Xue,Wen Zhang,Yongjing Zhang,Nan Wang,Langchong He
Background Mast cells (MCs) are important effector cells in anaphylaxis and anaphylactic disease. 3’,4’,5,7-tetrahydroxyflavone (THF) presents in many medicinal plants and exerts a variety of pharmacological effects. In this study, we evaluated the effect of THF on C48/80-induced anaphylaxis and the mechanisms underlying its effects, including the role of secreted phosphoprotein 1 (SPP1), which has not been reported to IgE-independent MC activation.Results THF inhibited C48/80-induced Ca2+ flow and degranulation via the PLCγ/PKC/IP3 pathway in vitro. RNA-seq showed that THF inhibited the expression of SPP1 and downstream molecules. SPP1 is involved in pseudo-anaphylaxis reactions. Silencing SPP1 affects the phosphorylation of AKT and P38. THF suppressed C48/80-induced paw edema, hypothermia and serum histamine, and chemokines release in vivo.Conclusions Our results validated SPP1 is involved in IgE-independent MC activation anaphylactoid reactions. THF inhibited C48/80-mediated anaphylactoid reactions both in vivo and in vitro, suppressed calcium mobilization and inhibited SPP1-related pathways.
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Defence Technology
·
2022
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IF 4.035
Peng Deng,Xue-yong Guo,Hua Fang,Rui Liu,Peng-wan Chen
Combined with the oxidizer anions and fuel cations, molecular perovskite energetic materials show a good potential. In this work, the combustion behavior and mechanism of metal fuel aluminium (Al) with molecular perovskite energetic material (H 2 dabco)[NH 4 (ClO 4 ) 3 ] (DAP-4) as a high-energy oxidant was investigated. The DAP-4 based composites with metal fuel Al were designed and fabricated by the different mass ratios. Results showed that DAP-4 exhibits a good oxygen-supplied capacity for enhancing the combustion performance of Al. The maximum combustion heat of DAP-4/Al-3 at the Al/O mass ratio of 38:62 is up to 10,412 J/g in the inert gas, which is higher than those of other ratios and the mixtures of other energetic materials and Al. The evolution of pressure output, pressurization rate, and flame temperature was monitored for DAP-4/Al with different mass ratios. Composites DAP-4/Al/F were characterized by burning rates. The combustion reaction mechanism of metal fuel Al with DAP-4 as a high-energy oxidant was provided. DAP-4 was ignited firstly and released acid and oxidizing gases, which corroded Al 2 O 3 shells on Al particle surfaces and accelerated the combustion reaction with Al to release a lot of energy. This work offered a new idea that molecular perovskite energetic materials have great potential in the high-energy Al-based solid rocket propellants.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2022
·Vol. 30
·期 1
·2283-2297
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IF 5.19
Hu Yuting,Wang Shixing,Zhang Libo,Yang Fan
In wastewater, heavy metal Hg causes serious harm to ecology, so it needs to be removed. In this paper, a novel MOF adsorbent (UiO-66-QU) was prepared by modifying UiO-66-NH 2 with 4-quinolinecarboxaldehyde, which was used to selectively remove Hg(II) from water. The adsorbent was characterized using Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET), zeta potentiometer, and X-ray photoelectron spectroscopy (XPS). In order to investigate the Hg(II) adsorption performance of UiO-66-QU, the effect of time, initial concentration, pH, and temperature were carried out. Langmuir model fitting shows that the maximum adsorption capacity of UiO-66-QU for Hg(II) is 556 mg/g at 298 K. The experimental results show that UiO-66-QU has better Hg(II) adsorption capacity than UiO-66-NH 2 . The isotherm is in accordance with pseudo-second-order models. It is indicated that the adsorption process is mainly monolayer chemical adsorption. The thermodynamic parameters also indicate that the adsorption process is spontaneous and endothermic. It has excellent reusability and selectivity. XPS and the zeta potential showed that the adsorption mechanism was the complex reaction of Hg(II) with nitrogenous group. Therefore, the adsorbent has potential application prospects in removal of Hg(II) from wastewater.
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POLYMER DEGRADATION AND STABILITY
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2022
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IF 5.204
Xinyu Cui,Quan Wu,Jun Sun,Xiaoyu Gu,Hongfei Li,Sheng Zhang
A boron-based biological flame retardant phenylboronic acid functionalized chitosan (B-CH) was prepared by reacting chitosan (CH) with 4-formylphenylboronic acids. The structure characterization was carried out by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and thermogravimetric analysis. B-CH was added into polylactic acid (PLA) by the melt blending method to improve the fire performance of the composite. The results showed that the peak heat release rate (PHRR) of PLA-7% B-CH decreased to 432 kW·m −2 from 564 kW·m −2 of control PLA. The limiting oxygen index (LOI) was increased from 19.1% to 26.2%, and the vertical burning test (UL-94) could reach a V-0 rating. The B-CH participated in the char formation process, which could generate a continuous compact char layer during the combustion to effectively protect the PLA matrix. This work provided an effective strategy to develop environmental friendly flame retardant PLA composites.
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POLYMER
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2022
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IF 4.432
Ze-Kun Zhang,Shi-Peng Ding,Ze Ye,Ding-Li Xia,Jun-Ting Xu
In this study, the poly(ionic liquid)s (PILs)-based block copolymers (BCPs) with a high charge density, poly(ethylene oxide)- b -quaternized poly(4-vinylpyridinium) with X − as counterion (PEO- b -QP4VP-X), were prepared by full quaternization of the poly(4-vinylpyridine) (P4VP) block in neutral PEO- b -P4VP BCP. The complete quaternization of P4VP block was confirmed by NMR and FT-IR. The phase separation behavior of PEO- b -QP4VP-X BCPs was examined, which was found to be strongly dependent on the counterion species. Specifically, as compared with the neutral PEO- b -P4VP, PEO- b -QP4VP-Br exhibits a stronger segregation strength , while the other three PEO- b -QP4VP-X (X = PF 6 , TFO and TFSI) BCPs show a weaker phase separation ability. The phase behavior of PEO- b -QP4VP-X was explained using the thermodynamic mechanism originally applied for salt-doped BCPs of low charge density. The variation of the Flory-Huggins parameter (Δ χ ) can be divided into three terms: Δ χ 1 due to the change in monomer identity after quaternization, Δ χ Born from the Born energy of counterions and χ Γ arising from the local charge cohesion. For PEO- b -QP4VP-X BCPs, both Δ χ 1 and Δ χ Born are negative, but χ Γ is positive, and they vary with counterion size in different ways. The competition of these three terms dominates the change tendency of phase behavior, among which Δ χ 1 plays an important role at high level of charge density. The rationality of the aforementioned thermodynamic mechanism of Δ χ was also verified by the phase behavior of salt-doped PEO- b -QP4VP-X.
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ACS Applied Energy Materials
·
2022
·
IF 6.959
Lina Tan,Jihuai Wu,Yuqian Yang,Chunyan Deng,Guodong Li,Xuping Liu,Yitian Du,Minmin Yang,Weihai Sun
Perovskite solar cells (PSCs) have made great research progress in the past decade. The interface behavior between the perovskite active layer (PAL) and hole transport layer (HTL) is one of the determinants of photovoltaic performance and stability of PSCs. Herein, we introduce a bifunctional modifier of 4-hydroxy-2,2,6,6-tetramethylpiperidine (HTMP) at the interface of PAL/HTL. The hydroxyl and imino groups in HTMP can interact with I and FA (MA) to form bi-directional hydrogen bonds to inhibit ion migration, reinforce the interface contact, and improve perovskite stability. On the other hand, the bifunctional groups of HTMP can passivate interface defects by coordinating with Pb2+, provide a more suitable energy gradient arrangement, and reduce nonradiative recombination loss. Compared to the efficiency of 19.05% obtained from the unmodified device, the HTMP-modified PSC achieves a maximum power conversion efficiency of 22.04%, along with a negligible hysteresis effect and good environmental stability, indicating that HTMP plays an excellent role in efficient and stable PSCs.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Xiaohui Wu,Qin Zhang,Fangyi Huang,Xingyu Huo,Fuyu Li,Yulan Jing,Yuanxun Li,Hua Su
In this work, a new low loss Ba 3 Ti 4- x (Mn 1/3 Nb 2/3 ) x Nb 4 O 21 (MN-BTN, 0 ≤ x ≤ 12 mol%) ceramics configuration was presented through preparing by the solid-state route. The XRD patterns, Rietveld refinement , microstructure, and microwave properties were systematically analyzed. All the fabricated MN-BTN ceramics belonged to the hexagonal structure with a P 6 3 / mcm space group. More specifically, the 6MN-BTN ceramic exhibited a high relative density of ~92.3 %, homogeneous grains distribution with an average size of ~71.95 µm, and several excellent microwave dielectric properties : ε r = 59.67, Q× f = 16,226 GHz, τ f = +103.9 ppm/℃ sintered at 1220 ℃. The incorporation of 1.5 wt % BaCu(B 2 O 5 ) (BCB) compound within the 6MN-BTN ceramic not only effectively reduced the sintering temperature from 1220 ℃ to 950 ℃, but also the excellent microwave dielectric properties were maintained: ε r = 42.33, Q× f = 11,300 GHz, τ f = +24.7 ppm/℃. Interestingly, the 6MN-BTN + 1.5 wt % BCB ceramic showed better chemical compatibility with Ag. The proposed 6MN-BTN + 1.5 wt % BCB ceramic configuration could be regarded as a promising material for LTCC applications.
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RENEWABLE ENERGY
·
2022
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IF 8.634
Wenjing Song,Mengxue Song,Wenqing Cai,Weichu Li,Xingmao Jiang,Weiping Fang,Weikun Lai
Development of highly active and stable catalyst for C–O bonds cracking is important in biomass conversion , in this work, we report a SiO 2 -encapsulated NiPt/HY core-shell catalyst for phenethoxybenzene (PEB) catalytic cracking . The as-grown silica shell with defined pores serves as a ‘storage’ to enhance local concentration of PEB and intermediate isomers and promotes catalytic cracking on NiPt/HY core. With the increase of silica shell thickness from 0 to 40 nm, PEB reaction rate has increased more than five times, and the major cracking product selectivity is raised to above 90%, which is attributed to the continuous conversion of PEB isomers within the shell. This designed structure endows the NiPt/HY@SiO 2 with a high activity and no obvious deactivation in PEB cracking to corresponding phenol and aromatics. The outstanding performance benefit from the enrichment effect on the unique core-shell structure, as well as the moderate acidity originated from silica regulation. This work can be extended to the modulation of microenvironment to promote the catalytic behavior of core-shell catalysts.
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ACS Applied Materials & Interfaces
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2022
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IF 10.383
Yanping Guo,Jichun Zhu,Dongxing Kou,Wenhui Zhou,Zhengji Zhou,Shengjie Yuan,Yafang Qi,Yuena Meng,Litao Han,Zhi Zheng,Sixin Wu
The kesterite Cu2ZnSn(S,Se)4 (CZTSSe) solar cells have shown a continuous rise in power conversion efficiencies in the past years. However, the encountered interfacial problems with respect to charge recombination and extraction losses at the CdS/CZTSSe heterojunction still hinder their further development. In this work, an additional plasmonic local electric field is imposed into the CdS/CZTSSe interface through the electrostatic assembly of a two-dimensional (2D) ordered Au@SiO2 NP array onto an aminosilane-modified surface absorber. The interfacial electric properties are tuned by controlling the coverage particle distance, and the finite-difference time domain (FDTD) simulation demonstrates that the strong near-field enhancement mainly occurs near the p-n junction interface. It is shown that the imposed local electric field leads to interfacial electrostatic potential (Velec) augmentation and improves the charge extraction and recombination processes. These electric benefits enable remarkable improvements in open-circuit voltage (Voc) and short-circuit current (Jsc), leading to the cell efficiency being increased from 10.19 to 11.50%. This work highlights the dramatic role of the plasmonic local electric field and the use of the 2D Au@SiO2 NP array to modify a surface absorber instead of the extensively used ion passivation, providing a new strategy for p-n junction engineering in kesterite photovoltaics.
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CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Jiaming Xiong,Minghui Ye,Zhijian Wang,Jiajun Chen,Yufei Zhang,Yongchao Tang,Cheng Chao Li
The uneven distribution and slow diffusion kinetics of potassium ions (K + ) result in the formation and growth of K dendrites as well as poor rate capabilities, restricting the development of K metal anodes (KMAs). Paired with a Mn-based Prussian blue (PB) cathode, the KMA-based full battery exhibits a low average discharging voltage of ≈3.6 V and a high overpotential. Herein, a N-doped graphene nanomesh (NGM) acts as a conductive and potassiophilic host to solve this issue. First, the NGM enables K + ions to rapidly transport its nanopores and edges to reach the whole electrode, offering unblocked transport channels for K + ions and thus acquiring an enhanced rate capability. Second, the N atoms and defects within NGM reduce the nuclear energy barrier of K + ions and induce their homogeneous deposition, avoiding the formation of K dendrites. Third, the nano-/micro-pores within NGM can accommodate the volume exchange of KMA during cycles, improving its cycling stability. Benefiting from these merits, the symmetric K@NGM cell delivers an ultra-low overpotential of 12.4 mV after 1700 h. Matched with a K 1.7 Mn[Fe(CN) 6 ] 0.9 /graphene cathode, a 4 V and dendrite-free KMnHCF/G‖K@NGM full cell is designed, which exhibits excellent cycling stabilities and rate capabilities.
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