ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 27
·40734-40744
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IF 5.19
Zhu Bo,Xu Jiangyan,Xu Zhihui,Wu Meisheng,Jiang Hongmei
A facile soft-template solvent thermal strategy was developed to prepare mesoporous carbon–silica composite (MMCS) by using furfuryl alcohol (FA) as carbon precursor, Pluronic copolymer P123 as template, hydrated iron nitrate as iron source, and teraethylorthosilicate as silicon source and it was applied for the removal of methyl orange (MO). The as-synthesized MMCS with abound of hydrophilic groups processed a high specific surface area, large pore volume, and good magnetic response. With the increased amount of FA, the surface area and functional groups increased, promoting the adsorption effect. The maximum adsorption capacity of MO on MMCS can be high to 113.1 mg g −1 at pH 4 with 150 mg L −1 initial MO concentration. The adsorption isotherm, kinetic, and thermodynamics were all studied and the results showed the adsorption process well fitted Langmuir adsorption isotherm and pseudo-second-order model. Additionally, it was shown that the adsorption process could not be interfered by the co-existence of PO 4 3− , NO 3 − , CO 3 2− , SO 4 2− , and real water matrix. And the proposed adsorbent can remove MO in three practical water samples with satisfied removal rates ranging from 92.8 to 99.8%. Thus, the MMCS prepared in this study could be utilized as an alternative adsorbent for the removal of methyl orange from practical aqueous solution.
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2022
·Vol. 331
·期 2
·889-902
·
IF 1.754
Fu Xibiao,Liu Jun,Ren Zheng,Zhang Siqin,Xiao Fangzhu,Peng Guowen
Metal-organic frameworks (MOFs) MIL-101(Cr)-PMIDA with phosphate groups were prepared for the adsorption of U(VI). The morphology and structure of the samples were characterized by SEM, TEM, FT-IR, BET, XPS and XRD. This study investigated the effects of the initial U(VI) concentration, contact time, pH, adsorption temperature and coexisting ions on the adsorption of U(VI) by MIL-101(Cr)-PMIDA. The experimental results showed that the adsorption capacity of MIL-101(Cr)-PMIDA was 267.92 mg g −1 at C 0 (U) = 40 mg L −1 , pH = 6.0 and T = 298 K, which was much higher than that of MIL-101(Cr)-NH 2 (71.10 mg g −1 ). More importantly, the material exhibited excellent selective removal performance for U(VI) in an aqueous solution. Furthermore, adsorption thermodynamics and kinetic studies showed that the adsorption was spontaneous (∆G < 0) and exothermic (∆H ˃ 0), following the pseudo-second-order kinetic model (R 2 > 0.99). Graphical abstract
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JOURNAL OF NANOBIOTECHNOLOGY
·
2022
·Vol. 20
·期 1
·1-15
·
IF 9.429
Liu Yu,Shang Wenting,Liu Heng,Hui Hui,Wu Jun,Zhang Wei,Gao Pengli,Guo Kunxiong,Guo Yanli,Tian Jie
Pro-tumoral and immunosuppressive M2-like tumor-associated macrophages (TAMs) contribute to tumor progression, recurrence and distal metastasis. However, current TAMs-modulating therapeutic strategies often encounter challenges including insufficient immune activation, weak antigen presentation ability and unsatisfactory antitumor immune performance. Herein, cyclic RGD peptide functionalized and manganese doped eumelanin-like nanocomposites (RMnMels) are reported for combined hyperthermia-immunotherapy against PC3 prostate cancer. The RMnMels could promote M2-to-M1 macrophage repolarization via scavenging multiple reactive oxygen species and remodeling the immunosuppressive tumor microenvironment. Following near-infrared light irradiation, RMnMels-mediated thermal ablation not only could destroy tumor cells directly, but also elicit the release of damage associated molecular patterns and tumor-associated antigens, provoking robust tumor immunogenicity and strong antitumor immune responses. The results showed that RMnMels could effectively scavenge reactive oxygen species and promote M2-to-M1 macrophage repolarization both in vitro and in vivo. Synergistically enhanced anti-tumor therapeutic efficacy was achieved following single administration of RMnMels plus single round of laser irradiation, evidenced by decreased primary tumor sizes and decreased number of distant liver metastatic nodules. The as-developed RMnMels may represent a simple and high-performance therapeutic nanoplatform for immunomodulation and enhanced antitumor immune responses.Graphical Abstract
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Biomass Conversion and Biorefinery
·
2022
·
IF 4.05
Li Xiao,Zhao Qingqing,Han Ming,Zhang Ke,Guo Zhongya,Li Bin,Wang Wei,Wei Xuhe,Liang Miao
In the present study, the effects of pretreatments with different solvents (hydrochloric acid, sodium hydroxide, and ethanol) on the physicochemical structure and pyrolysis behavior of tobacco stem (TS) were investigated. Elemental compositions analysis showed that acid washing increased the carbon content and exhibited a high removal percentage for the inorganic species. SEM, BET, and FTIR analysis showed that the pretreatments exerted different effect on the surface and microstructure. Furthermore, the pyrolysis characteristics analysis indicated that solvent pretreatment increased the initial pyrolysis temperature due to the removal of unstable volatile components, especially for the acid and alkali washing samples. Meanwhile, hydrochloric acid pretreatment increased the maximum pyrolysis rate temperature of cellulose decomposition stage and decreased the char residues due to the large removal of inorganic species, while alkali treatment produced the opposite result. Pyrolysis kinetic analysis based on Coats-Redfern method showed that F1.5 chemical reaction model can be used to describe the pyrolysis stages of TS samples and a decreased activation energy was observed during the decomposition of cellulose stage for the acid and alkali washed samples. The released gaseous products during the pyrolysis process were also monitored by using TG-FTIR technique, and the gaseous release behavior was different from each other.
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JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 51
·期 2
·486-494
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IF 2.047
Wang Xiaochun,Zhou Zhiwei,Lin Xuesong
In this work, we introduced two-dimensional (2D) WSe 2 with the lowest heat conductivity to enhance thermoelectric properties of the non-toxic and cost-effective SnTe. On one hand, the improved power factor can be attributed to the enhancement of Seebeck coefficient due to the decrease of low-energy carriers and minority carriers by the addition of WSe 2 -SnTe p - p -type heterojunction interface barriers. On the other hand, the thermal conductivity also decreased sharply by the heightened phonon scattering from the high-density stacking faults and multiscale hierarchical architectures. Ultimately, benefiting from the dual regulation effect of the introduction of 2D WSe 2 on the electro-acoustic decoupling, an improved figure of merit ( ZT ) of 1.0 is achieved for the composition of SnTe + 6 wt% WSe 2 at 873 K, which is enhanced by 134% in comparison with the pure SnTe sample. Moreover, the meaningful attempt represents an effective and feasible strategy for mixing SnTe with other compounds by the method of ball milling. Graphical Abstract
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FIBERS AND POLYMERS
·
2023
·Vol. 24
·期 6
·1951-1961
·
IF 2.5
Shi Shengnan,Feng Shuangjiang,Liu Chenghuan,He Man,Bu Xiaohai,Zhang Zewu,Zhou Yuming,Yao Qingzhao
Passive radiant cooling (PRC) technology has an irreplaceable position in building cooling and energy conservation due to sustainable and environmental friendly without energy consumption. However, the lack of consideration for building security in extreme weather conditions, especially in hot and overheated conditions, which propose a requirements for synergistic design of fire resistance and optical selectivity of materials. Herein, this work propose to introduce the compound (PAC) originated from phytic acid (PA) and cytosine (C) and the LDH nanosheets modified by ammonium polyphosphate (APP) into porous cellulose acetate (CA) film to obtain synergistically functionalized 2D/3D cellulose LDH photonic films (CPA films). The presence of substantial amounts of P elements effectively enhances the fire resistance of films, so that it burns without an open flame and with excellent self-extinguishing. Furthermore, the P=O and P−O in APP and PAC endows CPA films with outstanding atmospheric window emissivity via selective absorption, whose infrared emissivity is 93.68%. Meanwhile, the modified dispersive LDH increases solar radiation reflectivity to 96.15%. As a verification, building models covered with films are constructed, cooling of 6℃ be achieved and average energy saving efficiency is 22.8% through shading roof merely. Looking forward to the future, the CPA films will get a comprehensive application in buildings, 5G communication base stations, spacecraft and all equipment exposed to solar. Graphical abstract
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Nano Research
·
2023
·Vol. 16
·期 8
·10810-10821
·
IF 9.9
Ren Jinhong,Liu Jie,Du Yunmei,Li Shuangshuang,Wang Mengmeng,Li Bin,Yang Bo,Wang Lei,Liu Yanru
At present, Ru dopants mainly enhance electrocatalytic performance by inducing strain, vacancy, local electron difference, and synergy. Surprisingly, this work innovatively proposes that trace Ru atoms induce dual-reconstruction of phosphide by regulating the electronic configuration and proportion of Co-P/Co-O species, and ultimately activate superb electrocatalytic performance. Specifically, Ru-CoFeP@C/nickel foam (NF) is reconstructed to generate hydrophilic Co(OH) 2 nanosheets during the hydrogen evolution reaction (HER) process, further accelerating the alkaline HER kinetics of phosphide. And the as-formed CoOOH during the oxygen evolution reaction (OER) process directly accelerates the oxygen overflow efficiency. As expected, the overpotential at 100 mA·cm −2 ( η 100 ) values of the reconstructed Ru-CoFeP@C/NF are 0.104 and 0.257 V for HER and OER, which are greatly lower than that of Pt/C-NF and RuO 2 -NF benchmarks, respectively. This work provides guidance for the construction of high-performance catalysts for HER and OER dual reconstruction. This work provides a new idea for the optimization of catalyst structure and electrocatalytic performance.
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JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 22
·9116-9129
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IF 4.5
Mei Jing,Qiu Zhian,Gao Teng,Wu Qiang,Liu Kui,Huang Youguo,Zheng Fenghua,Jiang Juantao,Wang Hongqiang,Li Qingyu
Graphite powder as a raw material for the production of graphene by electrochemical exfoliation is superior to bulk graphite in terms of cost-effectiveness and manufacturing process. However, the current technology is still in its infancy and lacks preliminary systematic research. Therefore, there is a blank in the theoretical basis for process optimization and production regulation. Here, the effects of the main process parameters including graphite powder category, electric field driving force, electrolyte type, and corresponding concentration were systematically investigated on the electrochemical exfoliation and graphene quality. Expanded graphite powder with flake structure, regular graphite layer arrangement, and large graphite layer spacing is superior to natural flake graphite powder and artificial graphite powder for the electrochemical exfoliation to produce graphene. Sulfate ion with large ionic radius is best suitable for intercalation and subsequent expansion to obtain a high graphene yield and a low I D / I G in graphene in aqueous solution. For graphite powder as raw material, there exist optimal values for both electrolyte concentration and driving voltage for graphene production. A high graphene yield of 42.5% with low defect density ( I D / I G = 0.14–1.43) and oxygen content of 30.54% can be obtained using Na 2 SO 4 at a concentration of 0.1 M at a voltage of 10 V for 4 h. The process optimization and regulation and corresponding influencing mechanisms of process parameters revealed here will provide guidance for the further development of graphene production by electrochemical exfoliation of graphite powder.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 25
·67290-67302
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IF 5.8
Chen Zewen,Zhi Yunfei,Li Wenlong,Li Shuangjiang,Liu Yi,Tang Xiaoning,Hu Tianding,Shi Lan,Shan Shaoyun
Nitrogen-rich organic polymer poly(chloride triazole) (PCTs) was synthesized by a one-step method as metal-halogen-free heterogeneous catalyst for the solvent-free CO 2 cycloaddition. PCTs had abundant nitrogen sites and hydrogen bond donors, exhibited great activity for the cycloaddition of CO 2 and epichlorohydrin, and achieved 99.6% yield of chloropropene carbonate under the conditions of 110 ℃, 6 h, and 0.5 MPa CO 2 . The activation of epoxides and CO 2 by hydrogen bond donor and nitrogen sites was further explained by density functional theory (DFT) calculations. In summary, this study showed that nitrogen-rich organic polymer is a versatile platform for CO 2 cycloaddition, and this paper provides a reference for the design of CO 2 cycloaddition catalysts. Graphical abstract
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-12
·
IF 16.6
Zhang Lin,Peng Li,Lu Yuanchao,Ming Xin,Sun Yuxin,Xu Xiaoyi,Xia Yuxing,Pang Kai,Fang Wenzhang,Huang Ning,Xu Zhen,Ying Yibin,Liu Yingjun,Fu Yingchun,Gao Chao
Wet-chemical synthesis via heating bulk solution is powerful to obtain nanomaterials. However, it still suffers from limited reaction rate, controllability, and massive consumption of energy/reactants, particularly for the synthesis on specific substrates. Herein, we present an innovative wet-interfacial Joule heating (WIJH) approach to synthesize various nanomaterials in a sub-second ultrafast, programmable, and energy/reactant-saving manner. In the WIJH, Joule heat generated by the graphene film (GF) is confined at the substrate-solution interface. Accompanied by instantaneous evaporation of the solvent, the temperature is steeply improved and the precursors are concentrated, thereby synergistically accelerating and controlling the nucleation and growth of nanomaterials on the substrate. WIJH leads to a record high crystallization rate of HKUST-1 (~1.97 μm s −1 ), an ultralow energy cost (9.55 × 10 −6 kWh cm −2 ) and low precursor concentrations, which are up to 5 orders of magnitude faster, −6 and −2 orders of magnitude lower than traditional methods, respectively. Moreover, WIJH could handily customize the products’ amount, size, and morphology via programming the electrified procedures. The as-prepared HKUST-1/GF enables the Joule-heating-controllable and low-energy-required capture and liberation towards CO 2 . This study opens up a new methodology towards the superefficient synthesis of nanomaterials and solvent-involved Joule heating.
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ANALYTICAL SCIENCES
·
2023
·Vol. 39
·期 12
·1939-1946
·
IF 1.6
Xiang Jian Jun,Yuan Li Juan,Liao Qie Gen,Zhang Da Wen,Luo Lin Guang
Azo-linked covalent organic polymers (ACOPs) were synthesized by a simple azo reaction, with 2,2ʹ-bis(trifluoromethyl)benzidine and 1,3,5-trihydroxybenzene as the monomers. The preparation process was mild, green, and environmental-friendly, avoiding the use of high temperature, metal catalysis, and harmful organic reagent. The obtained ACOPs were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, powder X-ray diffraction, and Brunauer–Emmett–Teller. With the prepared ACOPs as adsorbent, a method of pipette tip solid-phase extraction–liquid chromatography–tandem mass spectrometry detection (PTSPE–LC–MS/MS) was proposed for the analysis of target sedatives in animal tissues. Furthermore, the parameters for the extraction of five sedatives, including the amount of adsorbent, pH value, ion strength, elution solvent and volume, were investigated. Under the optimized conditions, the linear dynamic range was found from 0.1 to 10.0 μg kg −1 , and the limits of detection were ranged from 0.02 to 0.1 μg kg −1 . The method was assessed by the analysis of target sedatives in animal tissues, and the recoveries for the spiked pork muscle and pork liver samples were 84–102% and 83–101%, respectively. The results show that the developed method of PTSPE–LC–MS/MS with ACOPs as adsorbent is efficient for the analysis of trace sedatives in animal tissues. Graphical Abstract
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JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 9
·1-9
·
IF 2.8
Wang Linlin,Wang Zhipeng,Qu Minjie,Zhou Guangyuan
There has been a broad demand for materials with high thermal stability and low dielectric constant in the field of microelectronic devices and communication technology. In this paper, a novel fluorinated poly(aryl ether) (FPAE) was prepared by S N 2 nucleophilic polycondensation. FPAE was demonstrated to possess a favorable dielectric constant of 2.68 at 1 MHz and its dielectric relaxation behavior at various temperatures and frequencies was analyzed. The resin performed excellent thermal stability and heat resistance, with a 5% mass loss temperature of 514 °C and a glass transition temperature of 260 °C. FPAE exhibits high solubility in N, N-dimethyl-formamide, acetone, ethyl acetate and other solvents. Excellent solubility gives FPAE good film formation and processability. The tensile strength and tensile modulus of FPAE were 67.0 MPa and 2.1 GPa, displaying decent mechanical properties. Attributed to the characteristics of the fluorine atoms, FPAE demonstrated a certain hydrophobicity with a water contact angle of 97.9°, as well as satisfactory water absorption (0.17%) and a low surface energy of 21.71 J/mm 2 . These data indicate that FPAE is expected to be used as low-dielectric material in microelectronics and communication technology.
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