Nature Communications
·
2022
·Vol. 13
·期 1
·1-12
·
IF 17.694
Zhang Yan,Wang Yafei,Guan Ying,Zhang Yongjun
Natural gels and biomimetic hydrogel materials have been able to achieve outstanding integrated mechanical properties due to the gain of natural biological structures. However, nearly every natural biological structure relies on water as solvents or carriers, which limits the possibility in extreme conditions, such as sub-zero temperatures and long-term application. Here, peptide-enhanced eutectic gels were synthesized by introducing α-helical “molecular spring” structure into deep eutectic solvent. The gel takes full advantage of the α-helical structure, achieving high tensile/compression, good resilience, superior fracture toughness, excellent fatigue resistance and strong adhesion, while it also inherits the benefits of the deep eutectic solvent and solves the problems of solvent volatilization and freezing. This enables unprecedentedly long and stable sensing of human motion or mechanical movement. The electrical signal shows almost no drift even after 10,000 deformations for 29 hours or in the −20 °C to 80 °C temperature range.
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高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2022
·Vol. 414
·期 29
·8447-8461
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IF 4.478
Li Hui,Ma Chunxia,Gao Meng,Li Yong,Xie Lei,Zhao Dantong,Zhang Runhao,Zhang Guanhua,Li Wenhan,Rong Rong,Kong Biao
The inhomogeneous distribution of co-crystallized analytes and the traditional organic matrices as well as the intensive background interference in the low molecular weight range hinder the application of matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) in the analysis of small-molecular compounds. New two-dimensional material MXene (e.g., Ti 3 C 2 ) exerts better hydrophilicity, homogeneity and repeatability, and higher laser desorption efficiency, as well as less background interference than traditional organic matrices and other nanomaterial matrices such as titanium oxide, graphene, and gold nanostructures. This study was aimed to design Ti 3 C 2 matrix with abundant hydroxyls on its surface, enhance the stability of this hydroxyl-rich Ti 3 C 2 (Ti 3 C 2 (OH) x ), and evaluate the analytical performances of Ti 3 C 2 (OH) x -assisted laser desorption/ionization time-of-flight mass spectrometry (LDI-TOF-MS) for small-molecular natural compounds in complex samples. The developed Ti 3 C 2 (OH) x showed the distinct advantages such as minimum background interference, high peak intensity (~10 5 ), high salt (0.6 M) and protein (0.5 mg/mL) tolerance, good repeatability (relative standard deviation<20%), and good stability after eight months of storage. Ti 3 C 2 (OH) x -assisted LDI-TOF-MS analysis could be used to rapidly identify Artemisia annua (a world-famous traditional Chinese medicine) and quantify the contents of the main chemical ingredients (oxymatrine (OXY) and matrine) of Compound Kushen Injection (CKI). Interestingly, the content of OXY in CKI could be accurately quantified by Ti 3 C 2 (OH) x -assisted LDI-TOF-MS, and there was a good linear relationship ( R 2 −0.9929), a low limit of detection (400 pg), and a low limit of quantification (600 pg) of OXY. Taken together, the rapid and accurate analysis of small-molecular natural compounds in complicated samples could be achieved by the Ti 3 C 2 (OH) x -assisted LDI-TOF-MS analysis. Graphical abstract
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 7
·19439-19449
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IF 5.19
Wu Junxue,Wang Bin,Qu Han,Wang Fang,Duan Lei,Yu Gang
Phenacetin (PNT) is one of the most frequently detected nonsteroidal anti-inflammatory drugs in the water ecosystems, which poses a potential risk to environmental aquatic organisms. Acid-washed zero-valent aluminum (ZVAl) as a highly efficient activator for persulfate (PS) process was investigated to degrade PNT from the aqueous solution. The results indicated that acid-washed pretreatment for ZVAl could efficiently increase the degradation efficiency of PNT in the PS treatment. The degradation efficiency of PNT (50 μM) was up to 90% in 4 hours with the addition of 0.2 g/L acid-washed ZVAl and 8 mM PS at pH 6.8 and 25 °C. The PNT degradation followed pseudo-first order kinetics in the present system. High activator dosage, PS concentration, and reaction temperature could enhance the PNT degradation. The presence of inorganic anions (i.e., NO 3 - , HCO 3 - ) and humic acid (HA) showed inhibitory effects on the PNT degradation. The reuse results illustrated the acid-washed ZVAl material would have continuous and efficient activation performance for PS to degrade the PNT. Radical scavenger experiments and electron paramagnetic resonance indicated that both SO 4 •- and •OH were major reactive species during the PNT degradation. The possible degradation pathways of PNT mainly included the break of C–N and C–O bonds and further oxidation.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
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2022
·Vol. 51
·期 12
·6637-6644
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IF 2.047
Liu Ying,Chen Ling,Jiang Hao,Li Chunzhong
The use of tin oxide (SnO 2 ) with high theoretical capacity in practical application as the anode material of lithium-ion batteries (LIBs) has been limited due to its large volume expansion and fast capacity decay. To address this problem, we proposed the synthesis of encapsulating SnO 2 nanoparticles in the channels of nitrogen-doped carbon nanotubes (SnO 2 -in-NCNTs) by capillary force. The confined spaces of NCNTs not only restrict the particle size of SnO 2 , but also effectively buffer the volume change during lithiation/delithiation processes. In addition, the conductive NCNTs also ensure the effective contact of the electrolyte to the electrode surface, facilitating both ion and electron transfer. When applied to LIBs, the SnO 2 -in-NCNTs possess high reversible capacities of 961.8 mAh g −1 at 0.1 A g −1 and 326.3 mAh g −1 at 10 A g −1 . Moreover, they exhibited superior cyclic stability with a capacity retention of 96% at 5 A g −1 after 500 cycles. This work provides a simple and effective strategy for performance improvement of SnO 2 -based anode materials.
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JOURNAL OF MATERIALS SCIENCE
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2022
·Vol. 57
·期 40
·19165-19176
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IF 4.682
Liu Jinchang,Shen Chenyang,Liu Qin,Li Yaping,Wang Tong,An Xiaoya,Liang Dingcheng,Xie Qiang
Coal liquefaction residue (CLR) has a high content of carbon and organic substances. However, sulfur and inorganics pose a challenge for the high-value-added utilization of CLR. In this work, general-purpose carbon fiber was successfully prepared by the new method of chlorination–dechlorination using CLR as raw material and benzyl chloride as chlorinating agent. The effect of benzyl chloride addition amount on the property of isotropic pitch precursor and the performance of general-purpose carbon fiber were investigated. The results showed that the as-prepared pitch precursors were dominated by carbon elements and contained small numbers of hydrogen, oxygen, nitrogen, and sulfur. The characteristic peaks generated from chlorine elements were observed in both FTIR and XPS spectra. The peaks at the wavenumbers of 1490 cm −1 and 696 cm −1 corresponded to the vibration of C–Cl bond, and a tiny Cl 2p peak located at 200.0 eV was observed by reducing the noise of XPS spectra. It indicates that the trace chlorine remains in the as-synthesized isotropic pitch precursor even after undergoing dechlorination. The molecular compositions of isotropic pitches were mainly polyaromatic hydrocarbons, and the chlorination–dechlorination promotes the oligomerization of polyaromatic hydrocarbons to form dimers and trimers. Therefore, the polycondensed degree and carbon aromaticity were improved. It is known from 13 C NMR analysis that the effect of chlorine–dechlorination makes the molecular structure of pitches transform more linear, thus enhancing their spinnability. In addition, the higher the amount of benzyl chloride added, the better the property of isotropic pitch was. The pitch of BC-30 and BC-40 showed excellent spinnability, stabilized property, and carbonized property compared to other pitches. The morphology of obtained carbon fiber was homogeneous and smooth without defects in surface and section. The as-prepared general-purpose carbon fiber demonstrated good tensile strength up to 1220 MPa with an average diameter of 8.5 μm. Graphical abstract
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Nanoscale Research Letters
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2022
·Vol. 17
·期 1
·1-12
·
IF 5.418
Wang Linxuan,Li Liang,Yuan Maohui,Yang Zining,Han Kai,Wang Hongyan,Xu Xiaojun
Spectrally determination of temperature based on the lanthanide-doped nanocrystals (NCs) is a vital strategy to noninvasively measure the temperature in practical applications. Here, we synthesized a series of SrF 2 :Yb 3+ /Ho 3+ NCs and simultaneously observed the efficient visible upconversion luminescence (UCL) and near-infrared (NIR) downconversion luminescence (DCL) under 980, 940 and 915 nm excitations. Subsequently, these NCs were further utilized for thermometers based on the Boltzmann (thermally coupled levels, TCLs) and non-Boltzmann (non-thermally coupled levels, NTCLs) of Ho 3+ ions in the first (~ 650 nm), second (~ 1012 nm) and third (~ 2020 nm) biological windows (BW-I, BW-II and BW-III) under tri-wavelength excitations. The thermometric parameters including the relative sensitivity ( \(S_{{\text{r}}}\) ) and temperature uncertainty ( \(\delta T\) ) are quantitatively determined on the I 648 / I 541 (BW-I), I 1186 / I 1012 (BW-II), and I 1950 / I 2020 (BW-III) transitions of Ho 3+ ions in the temperature range of 303–573 K. Comparative experimental results demonstrated that the thermometer has superior performances.
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高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2022
·Vol. 414
·期 26
·7731-7740
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IF 4.478
Liao Jun,Yu Zhicheng,Fu Li,Liu Jia,Jia Li
Realizing the rapid and on-site detection of biothiols in complex biological and food samples using simple assays and devices remains a major challenge. In this study, biothiols containing sulfhydryl groups were found to be able to inhibit the photo-triggered oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB). Based on the discovery, using the commercially available and low-cost TMB as the chromogenic substrate, an enzyme-free colorimetric approach was developed for the rapid determination of biothiols. The method does not involve the introduction of any natural enzymes, nanoenzymes, and external oxidants. The mechanisms of the photoinduced oxidation of TMB and the detection of biothiols were proposed. Furthermore, a smartphone-based portable device integrated with test strips was constructed by the 3D printing technique. This device can simultaneously meet the requirements of the photocatalytic oxidation reaction of TMB and the detection of biothiols. The entire process only takes less than 5 min. The successful detection of cysteine in urine and milk samples demonstrates the great potential of the device in the on-site assays. Graphical abstract
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高影响因子
Journal of Oceanology and Limnology
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2022
·Vol. 41
·期 1
·174-188
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IF 1.554
Cao Pan,Liu De,Liu Yuhan,Wang Huming,Zhang Chao,Yuan Chengqing,Liu Xiaodan
Marine biofouling causes serious harms to surfaces of marine devices in transportation, aquaculture, and offshore construction. Traditional antifouling methods pollute the environment. A novel and green antifouling strategy was developed to prevent effectively the adhesion of bacteria and microalgae. An antifouling surface was fabricated via coating Turgencin B Mox2 (TB) onto dopamine-modified 304 stainless steel (304 SS). The surface physical and chemical properties before and after modification were characterized by Fourier transform infrared spectrometer (FTIR), X-ray photoelectron spectrometer (XPS), contact angle measurement (CA), 3D optical profilometer, ellipsometer, and atomic force microscope (AFM). Antimicrobial peptide was coated onto the surface of 304 SS successfully, and the surface morphology and wettability of the modified sample were modified. Moreover, cytocompatibility of the peptide was evaluated by co-culture of peptide and cells, indicating promising cell biocompatibility at the modified sample surface. At last, antifouling performance and electrochemical corrosion were tested. Results show that the adhesion rates of Vibrio natriegens and Phaeodactylum tricornutum on the antifouling surface were reduced by 99.85% and 67.93%, respectively from those of untreated samples. Therefore, the modified samples retained superior corrosion resistance. The study provide a simply and green way against biofouling on ship hulls and marine equipment.
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Nature Communications
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2022
·Vol. 13
·期 1
·1-15
·
IF 17.694
Zhang Yiyi,Tian Sidan,Huang Liping,Li Yanan,Lu Yuan,Li Hongyu,Chen Guiping,Meng Fanling,Liu Gang L.,Yang Xiangliang,Tu Jiasheng,Sun Chunmeng,Luo Liang
Combining immune checkpoint blockade (ICB) therapy with photodynamic therapy (PDT) holds great potential in treating immunologically “cold” tumors, but photo-generated reactive oxygen species (ROS) can inevitably damage co-administered ICB antibodies, hence hampering the therapeutic outcome. Here we create a ROS-responsive hydrogel to realize the sustained co-delivery of photosensitizers and ICB antibodies. During PDT, the hydrogel skeleton poly(deca-4,6-diynedioic acid) (PDDA) protects ICB antibodies by scavenging the harmful ROS, and at the same time, triggers the gradual degradation of the hydrogel to release the drugs in a controlled manner. More interestingly, we can visualize the ROS-responsive hydrogel degradation by Raman imaging, given the ultrastrong and degradation-correlative Raman signal of PDDA in the cellular silent window. A single administration of the hydrogel not only completely inhibits the long-term postoperative recurrence and metastasis of 4T1-tumor-bearing mice, but also effectively restrains the growth of re-challenged tumors. The PDDA-based ROS-responsive hydrogel herein paves a promising way for the durable synergy of PDT and ICB therapy.
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Biomass Conversion and Biorefinery
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2022
·
IF 4.05
Su Jing,Miao Kai,Zhao Yuan,Li Tan,Zhao Zhigang,Luo Guanqun,Wang Kaige
Catalytic fast pyrolysis (CFP) of biomass is a promising technology that can convert biomass into fuels. To understand how the metal oxides modified HZSM-5 catalysts enhance the formation of desirable hydrocarbons as well as suppress the coke formation during catalytic pyrolysis of lignocellulosic biomass, three types of metal (molybdenum (Mo), gallium (Ga), and tungsten (W)) oxides modified HZSM-5 catalysts were prepared. The activity of the catalysts was evaluated on a micro-reactor system. The effects of the atmosphere, metal oxide types, loading amounts of metal oxide, and catalysis temperature were all discussed. The introduction of hydrogen significantly enhanced the formation of hydrocarbons and decreased the coke formation. The yield of aliphatic products was further increased by 60%, while coke formation was suppressed by 52% using metal oxide-modified HZSM-5. Among these catalysts, HZSM-5 modified by molybdenum oxide obtained the highest hydrocarbon yield of 49.6%. HZSM-5 modified by gallium oxide obtained the highest aliphatic hydrocarbon yield of 30.4%. Compared to the control test using the HZSM-5 catalyst, coke yields were also decreased by 36%, 38%, and 35% for HZSM-5 modified by molybdenum oxide, gallium oxide, and tungsten oxide, respectively. HZSM-5 modified by molybdenum oxide was selected to further investigate the effects of loading amounts, catalysis temperature, and biomass to catalysts ratio.
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JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 30
·14310-14323
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IF 4.682
Li Nanshu,Zhang Hanbing,Chen Zihao,Wei Jie
In this study, we report a kind of fluorescence-structural color photonic crystals (FSC-PCs) based on ultraviolet (UV)-responsive core-interlayer-shell (CIS) colloidal particles. The preparation process includes the synthesis of UV-responsive CIS colloidal particles and quick fabrication of FSC-PCs patterns. Here, fluorescent precursor spiropyran was added to the semi-continuous emulsion polymerization system and grafted onto polymer chains to form the colloidal particles, which were quickly assembled by spray coating method into FSC-PCs within a few minutes. The FSC-PCs have long-range disorder arrangement and angle-independent structural colors, which show structural colors in visible light and red fluorescent color in 365 nm UV light. Therefore, we designed and fabricated a two-side security card, both sides of which show different information under different light conditions. During the light switching progress, completely different information can be demonstrated reversibly, allowing data encryption and reading. The FSC-PCs with a simple quick assembly process and unique optical properties have profound potential in anti-counterfeiting and data display. Graphical abstract
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高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2022
·Vol. 48
·期 8
·3613-3631
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IF 3.134
Zhu Hai,Qiu Junqiang,Zhou Dan,Wang Haiyang,Xu Dan,Li Haixia
A series of activated carbon (CFAC-n, n = 1,2,3,4) adsorbents of higher adsorption capacity were synthesized through coconut fiber carbon (CFAC-0) and KOH activator (CFAC-0:KOH = 1:1, 1:2, 1:3, 1:4), respectively, by the heating method for chloramphenicol (CHL) adsorption. The pore diameter, pore volume, specific surface area and surface functional groups of CFAC-n were determined by several characterizations such as BET, XRD, Raman, TEM, FTIR and XPS. The adsorption kinetics of CFAC-n for CHL removal were investigated and the kinetic parameters were also calculated. According to the results, the adsorption capacity onto CFAC-n was positively correlated to the specific surface area. CFAC-3 possessed the largest specific surface area (1755 m 2 g −1 ) and the best adsorption amount (523.0 mg g −1 ). The adsorption conditions (adsorbent dosage, antibiotic initial concentration, adsorption temperature and pH value) of CFAC-3 showed to be directly related to the adsorption effect. In addition, it was found that the CHL adsorption onto CFAC-n was well suitable for fitting with pseudo-second-order kinetic model and Elovich kinetics model. The adsorption isotherm was carried on and it was found that CHL adsorption onto CFAC best fitted to Freundlich and Temkin model. Those results revealed that the adsorption process was heterogeneous adsorption by main chemisorption. The adsorption capacity for CHL onto CHAC-3 was much higher than those of reported low-cost adsorbents. The adsorption included mainly hydrogen bond and π–π conjugation interactions, and electrostatic interaction.
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