Materials Chemistry Frontiers
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2023
·Vol. 7
·期 19
·4497-4507
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IF 7
Chenglin Wang,Zuolin Zhang,Xuefan Zhao,Yunfei Zhu,Mengjia Li,Jike Ding,Cong Chen
The sequential deposition route is widely investigated in fabricating perovskite thin films for state-of-the-art perovskite photovoltaics. However, concerns such as lower morphological control, phase purity, and remnant unreacted salts such as methylammonium iodide (MAI) and PbI2 are raised, which can significantly deteriorate the optoelectronic properties and hence the operational durability of the devices. In this work, we developed a new interdiffusion-controlled nucleation (ICN) strategy by introducing sulfamic acid agents to improve the sequential deposition of perovskite crystals, achieving low defect density and high-quality perovskite films. Precisely, the ICN strategy can be used to tune the dense PbI2 films into a porous morphology, which promoted the adequate conversion of perovskite and reduced the residual PbI2. Owing to the enhanced crystallization of the perovskite films and passivated surface defects, we obtained a summit PCE exceeding 23% for perovskite solar cells and achieved responsivity values of up to 0.49 A W−1 with linear dynamic ranges of up to 136.75 dB for perovskite photodetectors. The ICN strategy provides a simple and effective way to improve the performance of perovskite-based photovoltaic devices.
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NANO LETTERS
·
2023
·
IF 10.8
Yunze Li,Kai Gao,Yi Zhang,Jianguo Jiao,Lin Zhang,Guoxin Xie
As a novel two-dimensional material, violet phosphorus (VP) has attracted a considerable amount of attention due to its high carrier mobility, anisotropy, wide band gap, stability, and easy stripping properties. In this work, the microtribological properties of partially oxidized VP (oVP) and the mechanism of reducing friction and wear as additives in oleic acid (OA) oil were studied systematically. When adding oVP to OA, the coefficient of friction (COF) decreased from 0.084 to 0.014 with the steel-to-steel pair, and the ultralow shearing strength tribofilm consisting of amorphous carbon and phosphorus oxides that formed resulted in the reductions of COF and wear rate individually by 83.3% and 53.9%, respectively, compared with those of pure OA. The results extended the application scenarios for VP in the design of lubricant additives.
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ELECTROPHORESIS
·
2023
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IF 2.9
Chengzhuang Yu,Shijie Dai,Ziqi Zhang,Shanshan Li,Jingmeng Cheng,Hezhi Hu,Jayne Wu,Junwei Li
Meat adulteration detection is a common concern of consumers. Here, we proposed a multiplex digital polymerase chain reaction method and a low-cost device for meat adulteration detection. Using a polydimethylsiloxane microfluidic device, polymerase chain reaction reagents could be pump-free loaded into microchambers (40 × 40 chambers) automatically. Due to the independence of multiplex fluorescence channels, deoxyribonucleic acid templates extracted from different animal species could be distinguished by one test. In this paper, we designed primers and probes for four types of meat (beef, chicken, pork, and duck) and labeled each of the four fluorescent markers (hexachlorocyclohexane [HEX], 6-carboxyfluorescein [FAM], X-rhodamine [ROX], and cyanine dyes 5 [CY5]) on the probes. Specific detection and mixed detection experiments were performed on four types of meat, realizing a limit of detection of 3 copies/µL. A mixture of four different species can be detected by four independent fluorescence channels. The quantitative capability of this method is found to meet the requirements of meat adulteration detections. This method has great potential for point-of-care testing together with portable microscopy equipment.
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ACS Nano
·
2022
·
IF 18.027
Chaojie Yu,Zhiwei Yue,Mingyue Shi,Lijie Jiang,Shuang Chen,Mengmeng Yao,Qingyu Yu,Xiaojun Wu,Hong Zhang,Fanglian Yao,Changyong Wang,Hong Sun,Junjie Li
Although hydrogel-based patches have shown promising therapeutic efficacy in myocardial infarction (MI), synergistic mechanical, electrical, and biological cues are required to restore cardiac electrical conduction and diastolic–systolic function. Here, an injectable mechanical–electrical coupling hydrogel patch (MEHP) is developed via dynamic covalent/noncovalent cross-linking, appropriate for cell encapsulation and minimally invasive implantation into the pericardial cavity. Pericardial fixation and hydrogel self-adhesiveness properties enable the MEHP to highly compliant interfacial coupling with cyclically deformed myocardium. The self-adaptive MEHP inhibits ventricular dilation while assisting cardiac pulsatile function. The MEHP with the electrical conductivity and sensitivity to match myocardial tissue improves electrical connectivity between healthy and infarcted areas and increases electrical conduction velocity and synchronization. Overall, the MEHP combined with cell therapy effectively prevents ventricular fibrosis and remodeling, promotes neovascularization, and restores electrical propagation and synchronized pulsation, facilitating the clinical translation of cardiac tissue engineering.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2022
·Vol. 415
·期 1
·157-166
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IF 4.478
Yang Zuan,Hu Jing,Zhang Xiaoyu,Yang Huimin,Meng Peiran,Zhao Huanying,Sun Yue
Sensitive determination of ofloxacin (OFL) is very essential for human health and environmental protection. Here, a novel composite of gold nanoparticles(nAu)@MXene(Ti 3 C 2 T x )/poly- p -aminobenzene sulfonic acid (PABSA) was fabricated on the surface of glassy carbon electrode (GCE) and used to sensitively determine OFL. The results of experiments showed that the obtained nAu@Ti 3 C 2 T x /PABSA/GCE electrode could be used as an electrochemical sensor to directly detect ofloxacin (OFL) by differential pulse voltammetry (DPV). Under the optimal conditions, the proposed electrode displayed a broader linear range and a lower detection limit (LOD) for OFL determination when it was compared to those similar sensors. The linear range was from 5.0 × 10 −8 to 5.0 × 10 −4 mol/L and the LOD was 3.7 × 10 −8 mol/L ( S / N = 3). The nAu@Ti 3 C 2 T x /PABSA/GCE electrode also showed good selectivity, repeatability, and reproducibility. Finally, the proposed electrode was used to detect OFL in commercial samples by the standard addition method. The obtained recovery was from 97.3% and 105.7% showing its potential applications in actual sample analysis. Graphical Abstract
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RENEWABLE ENERGY
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2022
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IF 8.634
Lingyan Zhu,Xudong Liu,Yuan Wu,Qifan Wang,Haotian Wang,Dongbing Li
Lignin-based activated carbons (LAC) were produced using thermochemical pretreatment and chemical activation with KOH. Fast pyrolysis at 550 °C in a CO 2 /N 2 atmosphere resulted in lignin char (LC) with a more developed porous structure than slow pyrolysis. The effect of activation conditions (KOH usage, temperature, and duration) on surface/physicochemical properties and electrochemical characteristics of the resulting LAC was fully studied. Using fast pyrolysis lignin char as a precursor and optimized activation conditions ( w KOH : w LC = 2, 800 °C, and 2 h), the resulting LAC featured a large surface area of 2149.5 m 2 g −1 , a total pore volume of 0.88 m 3 g −1 , and high capacitance of 300 F g −1 at 0.5 A g −1 in a 6 mol L −1 KOH electrolyte. The LAC-based symmetric supercapacitor could offer superior energy density (19.15 W h kg −1 at 250 W kg −1 power density) and a stable lifetime (98.2% of original capacity after 10,000 charge-discharge cycles). The excellent capacitor performance of LAC was attributed to its microporous-mesoporous structure developed from fast pyrolysis and subsequent chemical activation.
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Chem
·
2022
·
IF 25.832
Ping Xiong,Sangshan Peng,Leyuan Zhang,Aimin Li,Yuyue Chen,Sisi Xiao,Qing He,Guihua Yu
Summary A well-defined hydrophilic/hydrophobic nanophase-separated structure is widely applied for the construction of fast ion-transport pathways in polymeric membranes for energy-related applications such as electrochemical reactors, fuel cells, and redox flow batteries (RFBs). Conventional nanophase separation is induced by covalently grafted side chains, which however complicate membrane preparation and potentially reduce the chemical stability of membranes. In this work, we report a pseudo-nanophase-separation strategy enabled by supramolecular interactions to construct fast and selective ion-transport channels in polymeric membranes. The “side chains” are “grafted” onto the polymer backbone via supramolecular interactions instead of covalent bonds, simplifying the membrane preparation process and simultaneously protecting the polymer backbone from chemical degradation, which is a critical problem usually found in membranes with molecular modifications. The pseudo-nanophase separation enables high-performance membranes for aqueous acidic RFBs, showing high efficiency and good cycling stability, which suggests its potential to design highly conductive and chemically stable membranes for various energy-related devices.
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Frontiers in Marine Science
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2022
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IF 5.247
Liu Zhengyu,Yu Zhiming,Cao Xihua,Jiang Wenbin,Yuan Yongquan,Song Xiuxian
Red tide is a kind of marine disaster caused by the accumulation or proliferation of microalgae and other organisms in a short period of time, and utilizing modified clay to control and inhibit red tide is the preferred method. Among them, the application potential of organic-modified clay is high; unlike inorganic and microbial modifications, it has a broad-spectrum removal capacity on red tide algae at extremely low dosages. However, it has some disadvantages such as severe toxicity and high residual turbidity, leading to several limitations in its practical application. Therefore, it has become urgent to select organic-modified reagents with higher efficiency, weaker toxicity and lower residual turbidity. In this study, the typical red tide alga——Prorocentrum donghaiense was selected to detect the removal capacity of Polydimethyl diallyl ammonium chloride (PDMDAAC) modified clay (MP) by comparing with the Hexadecyl trimethyl ammonium bromide (HDTMA) modified clay (MH). Not only the physiological stress and flocculation effects of two modified clays on microalgae had been discussed, but also the properties of the modified clays had been characterized in this study. The results showed that the low degree of oxidative stress and less damage to the cell membrane make MP more environmentally friendly, PDMDAAC can remove microalgae at a low dose (2 mg/L) and quickly clarify the water by significantly enhancing the flocculation capacity of clay. In addition to discussing the removal mechanism of two modified clays on microalgae, schematic diagrams of the pathways were drafted. This study will provide support for the development of organic-modified clay.
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CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Yuchao Shao,Menggang Bao,Weizhong Huo,Rong Ye,Muhammad Ajmal,Wenjing Lu
Acid hydrothermal treatment of biowaste is favorable for producing hydrochar and corresponding hydrothermal solution containing saccharides, furans and aromatic compounds, while the alkaline hydrothermal condition is beneficial for their humification to form hydrothermal humic acid (HHA). Herein, the humification potential of hydrochar, hydrothermal solution, and their mixture under alkaline hydrothermal conditions was compared to further reveal their contribution to HHA. The result showed the main source of HHA was hydrochar, occupying 70 wt% of total HHA yield from their mixture while hydrothermal solution only contributed 17 wt%. Moreover, the HHA that existed in hydrochar (denoted as HHA acid ) was 32 wt% while the hydrochar-derived HHA obtained after alkaline hydrothermal treatment (denoted as HHA alk ) increased to 65 wt%, close to that from commercial coal or lignite. The hydrochar was further separated into four components, i.e. hydrothermal fulvic acid (HFA), stable HHA acid (S-HHA acid ) non-stable HHA acid ( N -HHA acid ) and remaining substance (RS), aiming to reveal the major pathway of the incremental HHA production under alkaline hydrothermal condition. Reactions of RS + HFA, RS + N -HHA acid and self-synthesizing of RS all contributed to the incremental HHA alk yield with the major contribution (75C%) from the first combination (RS + HFA). The pathways of alkaline hydrothermal humification of hydrochar were revealed after analyzing the molecular level structure of HHA alk by UPLC-MS. This in-depth analysis fills the knowledge gap in the mechanism of hydrothermal humification of biowaste.
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Bioactive Materials
·
2022
·
IF 16.874
Ao Zheng,Xiao Wang,Xianzhen Xin,Lingjie Peng,Tingshu Su,Lingyan Cao,Xinquan Jiang
Injectable hydrogel is suitable for the repair of lacunar bone deficiency. This study fabricated an injectable, self-adaptive silk fibroin/mesoporous bioglass/sodium alginate (SMS) composite hydrogel system. With controllable and adjustable physical and chemical properties, the SMS hydrogel could be easily optimized adaptively to different clinical applications. The SMS hydrogel effectively showed great injectability and shapeability, allowing defect filling with no gap. Moreover, the SMS hydrogel displayed self-adaptability in mechanical reinforcement and degradation, responsive to the concentration of Ca 2+ and inflammatory-like pH value in the microenvironment of bone deficiency, respectively. In vitro biological studies indicated that SMS hydrogel could promote osteogenic differentiation of bone marrow mesenchymal stem cells by activation of the MAPK signaling pathway. The SMS hydrogel also could improve migration and tube formation of human umbilical vein endothelial cells. Investigations of the crosstalk between osteoblasts and macrophages confirmed that SMS hydrogel could regulate macrophage polarization from M1 to M2, which could create a specific favorable environment to induce new bone formation and angiogenesis. Meanwhile, SMS hydrogel was proved to be antibacterial, especially for gram-negative bacteria. Furthermore, in vivo study indicated that SMS could be easily applied for maxillary sinus elevation, inducing sufficient new bone formation. Thus, it is convincing that SMS hydrogel could be potent in a simple, minimally invasive and efficient treatment for the repair of lacunar bone deficiency.
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ANALYTICAL LETTERS
·
2022
·
IF 2.267
Zhufeng Lu,Jiayou Li,Jie Shen,Hongmei Wang
A biosensor based on the optical signal of gold nanorods (GNRs) and an aptamer as the recognition element is reported to perform the rapid and selective spectrophotometric determination of profenofos. The GNR synthesized by the seed growth method have unique structures which binds with the aptamer through electrostatic adsorption and is well dispersed in a salt-containing solution. Upon the addition of profenofos, specific recognition caused aggregation of the GNRs. The optical signal therefore decreased and the response linearly related to the concentration of profenofos. The results demonstrate that ascorbic acid as the reducing agent plays an important role in the morphology of the GNRs. GNRs with the length-diameter ratio (L/D) of 12 stably combined with the aptamer. For the optimum conditions, spectrophotometric determination of profenofos was achieved using the biosensor with a linear relationship between the absorbance of GNR at 508 nm and the concentration of profenofos from 40 to 460 µg/L. The limit of detection of the method was 31.93 µg/L. In addition, this approach shows good selectivity for the analysis of fruits and vegetable. A valuable new method is reported for the determination of profenofos.
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Advanced Energy Materials
·
2022
·Vol. 12
·期 47
·2202634
·
IF 29.698
Xulei Lu,Tingting Yang,Chunqiao Fu,Zhongbao Jiang,Yong Zhang,Kedong Shang,Changliu He,Jian Zhou,Qi-Chang He
Harvesting electrical energy from different forms of water by using the hydrovoltaic effect is a promising approach to green energy acquisition. However, at present, different devices are required to obtain electrical energy from different water forms, and the output performance of the devices is not high, which greatly reduces the convenience and effectiveness of harvesting electrical energy from different water forms. Here, a carbon nanofiber electrode with a hierarchical porous structure capable of promoting water molecule adsorption, rapid penetration, and diffusion is reported. Besides, the electrode acts as a nanofluidic diode with anodic aluminum oxide in which the built-in electric field drives selective separation and directional transport of ions and efficient ion/electron current conversion at the electrodes. Unlike typical hygroelectric devices, the device can work with moisture (93% relative humidity, 25 °C, open-circuit voltage ( V OC ) ≈ 1.1 V, short-circuit current density ( J SC ) ≈ 27 µA cm −2 ), water droplets (2 µL, V OC ≈ 1.03 V, J SC ≈ 640 µA cm −2 ), and bulk water ( V OC ≈ 1.15 V, J SC ≈ 256 µA cm −2 ). It provides an efficient way to generate electricity in multiform water environment, greatly broadening the working scene and improving the adaptability of the device in complex weather environments.
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