Science China-Chemistry
·
2022
·Vol. 66
·期 1
·185-194
·
IF 10.138
Li Yong,Zhang Qian,Liu Lidan,Wang Dapeng,Liu Zhike,Yuan Ningyi,Ding Jianning,Wang Qiang,Liu Shengzhong (Frank)
The additive strategy has emerged as an effective approach to improving the performance of perovskite solar cells (PSCs). Herein, a small acceptor-donor-acceptor type molecule indaceno[1,2-b:5,6-b′]dithiophene chloride (IDT-Cl) is designed and synthesized to advance both the efficiency and stability of FA 0.85 MA 0.15 PbI 3 PSCs. Within the IDT-Cl molecule, the S-group with high electron density promotes chemical bonding with the lead cations in the perovskite, resulting in enlarged grain size and smoother surface topography of the perovskite absorber. In addition, the undercoordinated lead ions in the perovskite layer may be passivated by the carbonyl group in the 5-chloroindolin-2-one unit, thereby reducing the number of nonradiative recombination centers. Meanwhile, the IDT-Cl adjusts the energy level mismatch between the perovskite and two adjacent carrier transport layers, leading to easy charge collection. By the multifunctional effect of the IDT-Cl molecule, the modified device yields a high power conversion efficiency (PCE) of 24.46%, 8.8% higher than that of the control PSC (22.48%). More importantly, the hydrophobic alkyl side-chain of the IDT-Cl molecule further ensures enhanced humidity stability of the perovskite film and environmental, thermal, and light stabilities of the PSC devices.
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高影响因子
Cell Death Discovery
·
2022
·Vol. 8
·期 1
·1-13
·
IF 7.109
Lian Ni,Chen Yujie,Chen Sihan,Xiao Ta,Song Changjun,Ke Yangying,Wei Xuecui,Gong Chunyan,Yu Hui,Gu Heng,Chen Qing,Li Min,Chen Xu
Keratinocyte necroptosis (with proinflammatory characteristic) is required for epidermal damage in contact hypersensitivity (CHS). In DNCB-induced CHS mice model, we observed the aggravated keratinocyte death and increased phosphorylation level of MLKL, RIPK3 and RIPK1. However, CHS skin lesion did not present in keratinocyte-specific Mlkl knockout mice. We validated that MLKL-mediated keratinocyte necroptosis is required for epidermal damage in response to immune microenvironment in CHS. Moreover, MLKL-mediated necroptosis deficiency or inhibition resulted in blocking recruitment and activation of inflammatory cells in CHS via reducing HMGB1 release in keratinocytes. This study suggests that MLKL-mediated keratinocyte necroptosis functions as a self-amplified actor in inflammatory responses and could be considered as an effective therapeutic target. It proposes an innovative prospective that inhibiting keratinocyte necroptosis can prevent the development of epidermal damage in CHS.
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PubMed
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 52
·期 1
·402-413
·
IF 2.047
Liu Xinru,Yang Jianwei,Bian Zhentao,Zhao Xuanxuan,Zhu Yanyan,Wang Hongyan,Song Lei,Chu Juncai,Zhang Ying,Ye Ziyan
Biomass waste carbon sources enjoy a place of pride because of their low-cost, environmentally friendly, and readily available nature. The development of an efficient approach to transform biomass wastes into functional carbon-based electrode materials is a hot topic. However, the production process of biologically-based activated carbon needs to be further improved. Here, discarded badminton shuttlecock feathers were used as precursor via activation with potassium ferrate (K 2 FeO 4 ) to prepare hierarchical porous carbon. The obtained carbon material with hierarchical pore structure displays a high specific surface area ( S BET ) of 1279.5 m 2 g −1 , large total pore volume ( V total ) of 0.73 cm 3 g −1 ,and high-level hetero-atom doping (N: 3.78 at.%, O: 7.5 at.%, S: 3.85 at.%). Experimental results reveal that the as-prepared FPCB-750–1:3 exhibits an excellent specific capacitance ( C g ) of up to 449 F g −1 at the current density of 0.1 A g −1 . Moreover, even at 10 A g −1 , the FPCB-750–1:3 electrode still presents a high capacitance of 216 F g −1 . In addition, the energy density (ED) of the FPCB-750–1:3//FPCB-750–1:3 symmetric cell reaches 56 Wh kg −1 at a power density (PD) of 720 W kg −1 in an aqueous electrolyte (1 M Na 2 SO 4 ), meanwhile maintaining a high-class long-term electrochemical stability (fading lower than 4% after 10,000 cycles of charging and discharging). This study provides a trustworthy method to produce promising electrode materials from waste biomass for high-performance supercapacitors.
Graphical Abstract
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高影响因子
Microfluidics and Nanofluidics
·
2022
·Vol. 26
·期 11
·1-9
·
IF 3.09
Niu Bing-Su,Wang Yu-Hang,Lv Shuang,Yang Yu,Fang Fang,Song Yan-Yan,Wu Zhi-Yong
Charged components can be effectively separated and enriched based on ion concentration polarization (ICP) effect for sample clean up and enhancement of detection sensitivity in analytical chemistry. Concerning the role of electrolyte, current studies on electrokinetic stacking with ICP mainly focused on the ionic strength, and the knowledge about the type of supporting electrolyte (SE) is still poor. In this study, the significance of acid–base property of SE was systematically investigated based on an ICP interface established on a paper fluidic device with ion exchange membrane. Using colored ion probes for visualization of the effects, the ion depletion zone as the working area was applied for electrokinetic stacking. It has been shown that, besides the proper electroosmotic flow and ionic strength decided by neutral salt, the acid–base property of SE plays an important role for a successful stacking with ICP. The guideline for SE selection was proposed, and the mechanism was well explained by correlating the water dissociation effect and electric field/pH gradient (double gradients) at the ion depletion zone. This rule proposal is substantial for the design and operation of electrokinetic enrichment and separation of targeted species using ICP effect.
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CHINESE JOURNAL OF POLYMER SCIENCE
·
2022
·Vol. 41
·期 3
·334-344
·
IF 3.815
Zhao Chun-Xia,Guo Min,Mao Jie,Li Yun-Tao,Wu Yuan-Peng,Guo Hua,Xiang Dong,Li Hui
Flexible hydrogels have shown promise as strain sensors in medical monitoring, human motion detection and intelligent robotics. For a hydrogel strain sensor, certain challenges need to be urgently addressed for practical applications, such as the damage caused by external effects, leading to equipment failure, and the inability to perceive ambient temperature, resulting in single functionality. Herein, a stretchable, self-healing and dual temperature-strain sensitive hydrogel, with a physically-crosslinked network, is designed by constructing multiple dynamic reversible bonds. Graphene oxide (GO) and iron ions (Fe 3+ ) act as dynamic bridges in the cross-linked network and are mediated by the covalent and hydrogen bonding, rendering excellent stretchability to the hydrogel. The reversible features of coordination interactions and hydrogen interactions endow excellent recoverability and self-healing properties. Moreover, the incorporated N -isopropyl acrylamide (NIPAM) provides excellent temperature responsiveness to the hydrogel, facilitating the detection of external temperature changes. Meanwhile, the hydrogels exhibited strain-sensitivity, with a wide working range of 1%–300%, fast response and electrical stability, which can be used as flexible sensors to monitor body motions, e.g. , speaking and the bending of finger, wrist, elbow and knee. Overall, the hydrogel possesses dual sensory capabilities, combining external temperature and strain, for potential applications in wearable multifunctional sensing devices.
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高影响因子
BIOPROCESS AND BIOSYSTEMS ENGINEERING
·
2022
·Vol. 46
·期 1
·15-23
·
IF 3.434
Ding Chenrong,Xu Chaozhong,He Tao,Liu Xu,Zhu Yafei,Sun Liqun,Ouyang Jia,Gu Xiaoli
In this work, the effect of activated carbon particles on the production of xylonic acid from xylose by Gluconobacter oxydans in a stirred tank bioreactor was investigated. The enhancement of the oxygen transfer coefficient by activated carbon particles was experimentally evaluated under different solids volume fractions, agitation and aeration rates conditions. The experimental conditions optimized by response surface methodology (agitation speed 800 rpm, aeration rate 7 L min −1 , and activated carbon 0.002%) showed a maximum oxygen transfer coefficient of 520.7 h −1 , 40.4% higher than the control runs without activated carbon particles. Under the maximum oxygen transfer coefficient condition, the xylonic acid titer reached 108.2 g/L with a volumetric productivity of 13.53 g L −1 h −1 and a specific productivity of 6.52 g/g x /h. In conclusion, the addition of activated carbon particles effectively enhanced the oxygen mass transfer rate. These results demonstrate that activated carbon particles enhanced cultivation for xylonic acid production an inexpensive and attractive alternative.
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高影响因子
JOURNAL OF POLYMER RESEARCH
·
2022
·Vol. 29
·期 11
·1-13
·
IF 3.061
Xu Jingmei,Meng Lingxin,Shi Qingyuan,Ren Qiang,Wang Zhe
In this study, sulfonated poly (ether ketone sulfone)s polymers with long sulfonic acid alkyl side chains and amino groups were prepared by free radical and polycondensation reaction. Poly (ether ketone)s with carboxyl groups were used for macromolecule crosslinking agent to prepare cross-linked membranes by amidation reaction. This series of membranes were characterized by FT-IR and 1 H NMR. Meanwhile, cross-linked composite membranes possessed excellent mechanical properties, methanol resistance performance and thermal stability. The highest proton conductivity of 0.096 S cm −1 was observed for APD-3/CP at 80 °C. The range of methanol permeation coefficients for the prepared membranes (2.89 × 10 −7 cm 2 s −1 —4.95 × 10 −7 cm 2 s −1 ) was far lower as compared to that of Nafion 117 (24.1 × 10 −7 cm 2 s −1 ). The results of morphology, swelling ratio and proton conductivity showed that the hydrophilic-hydrophobic phase separation structure effectively improved the properties of the membrane namely water uptake, dimensional stability and proton conductivity. Long-side chains functionalized cross-linked sulfonated poly (ether ketone sulfone)s proton exchange membranes had good candidate for application in fuel cells.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 30
·23566-23579
·
IF 2.779
Guo Qiwen,Liu Siyuan,Men Xinpeng,Chen Zhe,Yao Lei,Wang Geming,Zhao Hongyang,Lin Zhidong,Wu Qian
In this paper, an ultra-sensitive glassy carbon electrode modified with β-cyclodextrin and graphene oxide (β-CD-GO/GCE) has been prepared for the detection of biomolecules [ascorbic acid (AA), dopamine (DA) and uric acid (UA)] in aqueous solution at μM level. The three biomolecules (AA, DA and UA) can be simultaneously detected by the modified electrodes, and the electrical signals corresponding to various biomolecules can be identified clearly in cyclic voltammetry and differential pulse voltammetry curves. The simultaneous detection limits of AA, DA, UA were 4.58, 1.56, 1.27 μM, respectively. This ultra-sensitivity should be attributed to the formation of host–guest complexes between β-CD and the biomolecules. Furthermore, the anti-interference experiments indicated the β-CD-GO/GCE exhibited satisfactory selective recognition performance.
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高影响因子
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
·
2022
·Vol. 45
·期 6
·3331-3344
·
IF 4.898
Li Xinyue,Jiang Yanyan,Chen Tianya,Zhao Pan,Niu Sen,Yuan Muzi,Ma Xiulan
The type of feedstock and pyrolysis temperature are the main reasons affecting the properties of the resulting biochar. Therefore, this paper investigates the effects of different feedstocks (peanut shell, corn straw and soybean straw) and different pyrolysis temperatures (300, 450 and 600 ℃) on the structural morphology and elemental composition of the resulting biochar. The optimum pyrolysis temperature of 600 ℃ was selected based on the comparison of the adsorption of NFX (norfloxacin) by the biochar prepared at different temperatures. Characterization of biochar materials using x-ray diffractometer, fourier transform infrared spectrometer and scanning electron microscope to study the changes in the physicochemical and structural properties of biochar. The results showed that the pH, surface area and ash content of biochar are increased with increasing temperature. The results of isothermal adsorption and adsorption kinetics experiments showed that the adsorption processes of the three biochar species on NFX were consistent with the Langmuir model and Pseudo-second order kinetic model. The adsorption process occurred in the surface layer of the biochar and was dominated by chemisorption. The inhibition of the adsorption of NFX was more obvious with the higher valence state of cations and the higher ion concentration. The adsorption mechanism of biochar on NFX includes pore filling, hydrogen bonding and electrostatic interactions.
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高影响因子
MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 9
·1-11
·
IF 6.408
Yang Yu-Ping,Chen Ji-Kai,Guo Ping,Lu Yan-Rui,Liu Cai-Fang,Wang Bang-Jin,Zhang Jun-Hui,Xie Sheng-Ming,Yuan Li-Ming
A spherical chiral porous organic polymer (POPs) COP-1 is synthesized by the Friedel–Crafts alkylation reaction of Boc-3-(4-biphenyl)-L-alanine (BBLA) and 4,4′-bis(chloromethyl)-1,1′-biphenyl (BCMBP), which was used as a novel chiral stationary phase (CSPs) for mixed-mode high-performance liquid chromatography (HPLC) enantioseparation. The racemic compounds were resolved in normal-phase liquid chromatography (NPLC) using n-hexane/isopropanol as mobile phase and reversed-phase liquid chromatography (RPLC) using methanol/water as mobile phase. The COP-1-packed column exhibited excellent separation performance toward various racemic compounds including alcohols, amines, ketones, esters, epoxy compounds, organic acids, and amino acids in NPLC and RPLC modes. The effects of analyte mass and column temperature on the separation efficiency of racemic compounds were investigated. In addition, the chiral resolution ability of the COP-1-packed column not only can be complementary in RPLC/NPLC modes but also exhibit a good chiral recognition complementarity with Chiralpak AD-H column and chiral porous organic cage (POC) NC1-R column. The relative standard deviations (RSD) ( n = 5) of the retention time, resolution value, and peak area by repeated separation of 1-(4-chiorophenyl)ethanol are all below 3.0%. The COP-1 column shows high column efficiency (e.g., 17,320 plates m −1 for 1-(4-chlorophenyl)ethanol on COP-1 column in NPLC), high enantioselectivity, and good reproducibility toward various racemates. This work demonstrates that chiral POPs microspheres are promising chiral materials for HPLC enantioseparation. Graphical abstract
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高影响因子
MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 9
·1-10
·
IF 6.408
Wang Yuexin,Chen Rui,Shen Bo,Li Cai,Chen Junman,Wang Yanshuang,Tian Shen,Li Xuemiao,Luo Nini,Liu Rui,Ding Shijia,Zhu Chuanlong,Xia Qianfeng
A multifunctional catalytic nanomaterial (Co-MOF@AuNP@ABEI) composed of cobalt-doped metal–organic frameworks (Co-MOF), gold nanoparticles (AuNP), and N -(4-aminobutyl)- N -(ethylisoluminol) (ABEI) is reported. Co-MOF@AuNP@ABEI exhibits high synergistic and zero-distance catalytic properties, which are beneficial to the improvement of the detection sensitivity of an electrochemiluminescent (ECL) biosensor. After coupling with the ECL system and 3D magnetic walking nanomachine amplification strategy, the Co-MOF@AuNP@ABEI can achieve an ultrasensitive ECL assay of Burkholderia pseudomallei with the limit of detection (LOD) of 60.3 aM, which is 2 and 4 orders of magnitude lower than individual ECL system without the nanomachine (4.97 fM) and individual walking nanomachine (340 fM), and superior to the pathogenic bacteria analyses in the previous report. Moreover, the LOD of the proposed ECL detection system for the determination of B. pseudomallei in serum sample was as low as 9.0 CFU mL −1 . The relative standard deviations (RSD) of ECL intensity for the detection of five B. pseudomallei -spiked serum samples were 4.02%, 0.84%, 0.84%, 1.55%, and 0.21%, respectively. The recoveries of the ECL biosensor for the detection of B. pseudomallei DNA-spiked serum samples were 93.63 ~ 107.83%. Therefore, this work demonstrated that the developed multifunctional catalytic nanomaterial with synergistic and zero-distance catalytic properties can be used as excellent ECL signal reporter to improve the detection sensitivity of ECL biosensor. Graphical abstract
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高影响因子
TRANSACTIONS OF TIANJIN UNIVERSITY
·
2022
·Vol. 29
·期 1
·46-61
·
IF 0
Shi Baozhao,Feng Jiangli,Liu Jing,Zhou Yanan,Zhang Jinli,Li Wei
A sol–gel tandem with a solid-phase modification procedure was developed to synthesize Li 2 TiO 3 -doped LiCoO 2 together with phosphate coatings (denoted as LCO-Ti/P), which possesses excellent high-voltage performance in the range of 3.0–4.6 V. The characterizations of X-ray diffraction, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy illustrated that the modified sample LCO-Ti/P had the dopant of monoclinic Li 2 TiO 3 and amorphous Li 3 PO 4 coating layers. LCO-Ti/P has an initial discharge capacity of 211.6 mAh/g at 0.1 C and a retention of 85.7% after 100 cycles at 1 C and 25 ± 1 °C between 3.0 and 4.6 V. Nyquist plots reflect that the charge transfer resistance of LCO-Ti/P after 100 cycles at 1 C is much lower than that of the spent LCO, which benefits Li-ion diffusion. Density functional theory calculations disclose the superior lattice-matching property of major crystal planes for Li 2 TiO 3 and LiCoO 2 , the lower energy barriers for Li-ion diffusion in Li 2 TiO 3 , and the suppressed oxygen release performance resulting from phosphate adsorption. This work provides useful guidance on the rational design of the high-voltage performance of modified LiCoO 2 materials in terms of lattice-matching properties aside from the phosphate coating to reduce the energy barriers of Li-ion diffusion and enhance cycling stability.
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