APPLIED THERMAL ENGINEERING
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2023
·
IF 6.4
Lei Shi,Wenliang Tao,Nianben Zheng,Tian Zhou,Zhiqiang Sun
Solar energy has the potential to be applied in the production of vapour that relies on high-temperature liquids in conventional ways because it is one of the reproducible energy sources. In this work, a magnetic photo-thermal evaporator (MPE) based on nickel foam coated with reduced-graphene-oxide is used to produce vapour. The increase of thermal conversion efficiency can be implemented by a solar absorbed structure that promotes the vaporization of generated water. MPE has its optimal energy conversion efficiency of 98 %. Due to the coupling joule heat and solar thermal processes, the efficient and stable interfacial evaporated performance could be controlled, which is to optimize the multi-process coupling and multi-energy complementary process and promote the actual applications of MPE. Under the solar power of 1000 W·m −2 , the evaporation rates obtained were 1.75 kg·m −2 ·h −1 and 1.81 kg·m −2 ·h −1 for the coupled continuous and segmented magnetic fields for the 90 s, which are much higher than the theoretical evaporation rate limit for two-dimensional interfacial photo-thermal evaporator. In case of extreme water shortage, the magnetic field can be used to assist in the rapid extraction of fresh water. The advantages of rapid fabrication and lower cost of the MPE have made the developments of solar evaporator applications possible such as desalination and wastewater treatment.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xinping He,Tianyi Zhuang,Shuai Ruan,Xinhui Xia,Yang Xia,Jun Zhang,Hui Huang,Yongping Gan,Wenkui Zhang
The rapid development of intelligent and wearable electronic products poses new challenges to flexible energy storage devices with wide operating temperature range, stable performance and safety. Hydrogel electrolytes own high conductivity at room temperature, but will freeze below zero inevitably, limiting ion transport and thus affecting electrochemical performance. To address this problem, an innovative poly(ionic liquid) hydrogel-based anti-freezing electrolyte is fabricated by copolymerization of 1-vinyl-3-butyl imidazole bromide (VBIMBr) monomer and acrylamide (AM) monomer, and assembled with activated carbon (AC) electrode to form a symmetrical supercapacitor. Poly(acrylamide) (PAM hydrogel) as the scaffold and poly(1-vinyl-3-butyl imidazolium bromide) (P(VBIMBr)) not only provides structural units with stable size, but also acts as functional units for conducting lithium ions. The anti-freezing electrolyte exhibits remarkable conductivity (26 mS/cm) and the symmetrical supercapacitor possesses excellent electrochemical properties (the specific capacitance is 204 mF/cm 2 at 1 mA/cm 2 ). It is worth noting that the capacitance loss of the supercapacitor is only 20.1% at −20 ℃. In addition, the electrolyte also shows the functional characteristics of acid and alkali resistance and bending resistance. The overall merits of the electrolyte will reveal new ideas for the development of hydrogel electrolyte.
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高影响因子
RENEWABLE ENERGY
·
2023
·
IF 8.7
Qunying Sun,Huanhuan Zhang,Yanping Fan,Linyan Bian,Qiuming Peng,Baozhong Liu
Regulating the electronic structure of noble metals through metal alloy–support interactions is significant for hydrogen economy . Herein, a PdAg alloy highly dispersed on the surface of Ti 3 C 2 is successfully designed through a simple microwave-assisted reduction method. The catalytic activity of PdAg alloys with various molar ratios manifests obviously enhanced catalytic activity compared to monometallic catalysts toward hydrogen generation in ammonia borane (AB) hydrolysis. Specifically, Pd 4 Ag 1 /Ti 3 C 2 presents an optimal turnover frequency (TOF) value of 1296 min− 1 at room temperature and a lower activation energy ( E a ) of 38.8 kJ mol -1 . Through the experimental results, the formation of a PdAg alloy with the introduction of the second metal Ag adjusts the electronic structure around Pd and enhances the catalytic activity. Additionally, the metal alloy–support interaction between Ti 3 C 2 and the PdAg alloy significantly promotes hydrogen generation during the hydrolysis of AB. This study provides new ideas and a reasonable basis for heterogeneous catalysis based on bimetallic catalysts .
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高影响因子
POLYMER COMPOSITES
·
2023
·Vol. 44
·期 8
·4815-4825
·
IF 5.2
Yuxiang Nie,Xiaoyao Zhou,Lisong Dong,Zhangzhong Wang,Xin Feng,Jiahua Zhu,Xiaohua Lu,Liwen Mu
A series of epoxy composite coatings filled with liquid metal (LM) and graphene oxide (GO) are successfully prepared as the self-lubricating material in this work. The dispersion of LM and GO (LM@GO) in epoxy coating and its effect on the thermal, tribological, and mechanical properties of epoxy coating are systematically studied by using thermogravimetric analysis, differential scanning calorimetry, mechanical and friction, and wear tester. The LM@GO filler has been proved to be an effective composite filler, which can be uniformly dispersed in epoxy coating, reduce the wear volume, and improve its mechanical properties of epoxy coating. When the filler content is 0.5 wt% LM and 0.03 wt% GO, the wear volume of epoxy composite coating is dramatically reduced by 91.7% and the elastic modulus is increased by 16.3% compared with pure epoxy. The synergistic effect of the friction reduction of LM and the mechanical support of GO makes the composite coating form a uniform and stable transfer film, which improves its wear resistance. And through chemical stability experiments, the composite coating has a strong resistance to acid and alkali. This work will render the epoxy-LM@GO have the potential of application on the mechanical molds, electronic components.
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高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Ying Chu,Peng Wang,Yihong Ding,Jie Lin,Xinxin Zhu,Shiqiang Zhao,Huile Jin,Tianbiao Zeng
Antimony (Sb) has been considered a promising anode for sodium-ion batteries (SIBs) owing to its high theoretical capacity (660 mA h g–1) and low redox voltage (0.2–0.9 V vs Na+/Na). However, the capacity degradation caused by the volumetric variation during battery discharge/charge hinders the practical application. Herein, guided by the DFT calculation, Sb/Fe2S3 was fabricated by annealing Fe and Sb2S3 mixed powder. Next, Sb/Fe2S3 was blended with 15 wt % graphite by ball milling, yielding nano-Sb/Fe2S3 anchored on an exfoliated graphite composite (denoted as Sb/Fe2S3-15%). When applied as an anode of SIBs, Sb/Fe2S3-15% delivered reversible capacities of 565, 542, 467, 366, 285, and 236 mA h g–1 at current rates of 1, 2, 4, 6, 8, and 10 A g–1, respectively, surpassing most of the Sb-based anodes. The co-existence of highly conductive Fe2S3 and Sb minimizes the polarization of the anode. Our experiments proved that the Sb and Fe2S3 phases were reversible during discharge/charge cycling, and the exfoliated graphite can accelerate the Na+ diffusion and e– conduction. The proposed synthesis method of this work can also be applicable to synthesize various antimony/transition metal sulfide heterostructures (Sb/M1–xS), which may be applied in a series of fields.
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PubMed
高影响因子
TALANTA
·
2023
·
IF 6.1
Jing Yang,Hao Liu,Yan Huang,Li Li,Xiaoli Zhu,Yaping Ding
Fluorescence carbon quantum dots (CQDs) have been widely applied to sensing and bioimaging. In this paper, near-infrared carbon quantum dots (NIR-CQDs) were prepared through a simple one-step hydrothermal approach using reduced glutathione and formamide as raw materials. Based on NIR-CQDs, aptamer (Apt) and graphene oxide (GO) has been applied to fluorescence sensing cortisol. NIR-CQDs-Apt adsorbed to the surface of GO through π-π stacking and an inner filter effect (IFE) occurred between NIR-CQDs-Apt and GO leading to NIR-CQDs-Apt fluorescence “off”. The IFE process is disrupted in the presence of cortisol, allowing NIR-CQDs-Apt fluorescence “on”. This led us to construct a detection method with excellent selectivity over other cortisol sensors. The sensor can detect cortisol from 0.4 to 500 nM and has a detection limit as low as 0.13 nM. Importantly, this sensor can be used to detect intracellular cortisol with excellent biocompatibility and cellular imaging capabilities, which is promising for biosensing.
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PubMed
高影响因子
Journal of Environmental Sciences
·
2023
·
IF 6.9
Xiaoge Wu,Lei Yan,Rongrong Qin,Qikai Zhang,Wei Yang,Xiaozhi Wang,Yongcai Zhang,Min Luo,Jianhua Hou
Bi 2 O 2 CO 3 (BOC)/Bi 4 O 5 Br 2 (BOB)/reduced graphene oxide (rGO) Z-scheme heterojunction with promising photocatalytic properties was synthesized via a facile one-pot room-temperature method. Ultra-thin nanosheets of BOC and BOB were grown in situ on rGO. The formed 2D/2D direct Z-scheme heterojunction of BOC/BOB with oxygen vacancies (OVs) effectively leads to lower negative electron reduction potential of BOB as well as higher positive hole oxidation potential of BOC, showing improved reduction/oxidation ability. Particularly, rGO is an acceptor of the electrons from the conduction band of BOC. Its dual roles significantly improve the transfer performance of photo-induced charge carriers and accelerate their separation. With layered nanosheet structure, rich OVs, high specific surface area, and increased utilization efficiency of visible light, the multiple synergistic effects of BOC/BOB/rGO can achieve effective generation and separation of the electron-holes, thereby generating more •O 2 − and h + . The photocatalytic reduction efficiency of CO 2 to CO (12.91 µmol/(g·hr)) is three times higher than that of BOC (4.18 µmol/(g·hr)). Moreover, it also achieved almost 100% removal of Rhodamine B and cyanobacterial cells within 2 hours.
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PubMed
高影响因子
ENERGY & FUELS
·
2023
·
IF 5.3
Peng Wang,Yihong Ding,Ying Chu,Xinxin Zhu,Jie Lin,Lixiong Shao,Tianbiao Zeng
FeSb2S4 is considered a potential anode material of sodium-ion batteries (SIBs) due to the high theoretical capacity (877 mAh g–1) and fast Na+ diffusion kinetics. Synthesis of the FeSb2S4-based anode via a simple strategy is essential for practical applications. In this study, nano FeSb2S4 anchored on exfoliated graphite (FeSb2S4-G) was fabricated via a two-step strategy: heat treatment of commercial FeS+Sb2S3 powder and then ball-milling with commercial graphite. X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) calculations reveal that the pulverized nano FeSb2S4 and exfoliated graphite establish the chemical bonds, which is very advantageous to boost the charge/discharge reversibility. As-prepared FeSb2S4-G delivered 577 mAh g–1 in the second cycle under 100 mA g–1 and kept 385 mAh g–1 in the 70th cycle; the cycling stability surpassed bulk FeSb2S4 (662 mAh g–1 in the 2nd cycle, 109 mAh g–1 in the 70th cycle). Considering only two steps of the synthesis processes, this work presents a viable strategy for fabricating high-performance FeSb2S4-based SIB anode materials.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 26
·2212582
·
IF 19
Hui Li,Jianqiang Zhang,Shaopeng Gan,Xilu Liu,Lei Zhu,Fujun Xia,Xiaoming Luo,Qingzhong Xue
Oil–water separation membranes easily fail to oil foulants with low surface energy and high viscosity, which severely limits these membranes’ applications in treating oily wastewater. Herein, an oil–water separation membrane by bioinspired bubble-mediated antifouling strategy is fabricated via growing hierarchical cobalt phosphide arrays on stainless steel mesh. The as-prepared membrane is superhydrophilic/superaerophobic and electrocatalytic for hydrogen evolution under water, which helps to rapidly generate and release abundant microbubbles surrounding the oil-fouled region on the membrane. These microbubbles can spontaneously coalesce with the oil foulants to increase their buoyancy and warp their interface tension by morphing the oil shape. And this spontaneous coalescence also increases the kinetic energy of oil foulants resulting from the decreased bubbles’ interface energy and potential energy. The synergy of the warped interface tension, increased buoyancy, and kinetic energy drives the efficiently dynamic antifouling of this membrane. This dynamic antifouling even can remove some solid sediment such as oily sand particles that causes more serious fouling of the membrane. Thus, this membrane maintains high flux (>11920 L m −2 h −1 bar −1 ) in the long-term separation of oil–water and oil–sand–water emulsions by dynamically recovering the decayed flux on demand, which exhibits great potential in treating industrial oily wastewater.
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高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Yaqing Zhang,Zhimin Yang,Liang Zhao,Yunpeng Xing,Congcong Xin,Zefeng Wei,Teng Fei,Sen Liu,Tong Zhang
Reduced graphene oxides (RGO)-based materials exhibit high carrier mobility and selective recognition ability to NO 2 , making them constitute promising platform for room-temperature NO 2 detection. However, the low sensitivity becomes the main bottleneck for their further development. Here, we demonstrate that synergy of Pd nanoparticles (NPs) and oxygen vacancies can modulate the surface active sites over SnO 2 NPs modified RGO hybrids (labeled as SR), leading to improving the sensitivity of room-temperature NO 2 sensors. Experimentally, a wet-chemical method was used to introduce oxygen vacancies onto SR, leading to forming SR with rich oxygen vacancies (labeled as SR-Vo), which were subsequently deposited with Pd NPs, resulting in preparing Pd NPs loaded SR-Vo hybrids (labeled as Pd-SR-Vo). Impressively, the response value to 1 ppm NO 2 of Pd-SR-Vo hybrids reaches to 9.8, which is much higher than that of R-Vo hybrids (5.6) and SR hybrids (3.3). The improvement of sensitivity toward NO 2 for Pd-SR-Vo hybrids is attributed to the synergy effect of Pd NPs and oxygen vacancies, including shortening the band gap of Pd-SR-Vo hybrids with raising conduction band level, widening the width of electron depletion layer between SnO 2 -Vo and RGO, introducing Schottky contact between Pd and SnO 2 -Vo, improving efficiency for gas sensing reaction. This work not only provides an efficient approach to fabricate high-performance NO 2 sensors, but also opens a new avenue for sensing materials design and modification.
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高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Shaosheng Rao,Qinqin Liu,Bing Li,Yangyang Sun,Yinmao Wang,Guozhong Gao,Zhongti Sun,Juan Yang
Silver nanoparticles (Ag NPs) are used as antimicrobial agents due to their high-efficiency, broad-spectrum disinfection activity. However, the agglomeration and stability problems caused by excessive release of silver ions (Ag + ) have severely restricted their developments. Herein, a novel silver/polyethyleneimine/reduced graphene oxide (Ag/PEI/rGO) antibacterial material featuring good dispersibility and permeability was rationally designed, thus benefiting for the capture of bacteria due to the introducing of highly-cationic PEI modifier and controllable release of biocidal agents (Ag + ). Compared with Ag/rGO, the Ag/PEI/rGO has excellent stability and shows a more efficient sterilization efficacy against Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) with 100% germicidal efficiency with low orders of dozens of ppm. In addition, the outstanding biocompatibility of this Ag/PEI/rGO antibacterial material endows it with promising potential in sterilization applications, which is expected to solve the infection problem caused by bacterial biofilm formation.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Hao Ai,Siyu Jian,Yuan Yao,Kaifeng Du
Designing and tuning macropores into aligned structure is of considerable importance in promoting mass transfer, improving chromatographic performance and enhancing column efficiency. Herein, we have synthesized an innovative aligned porous Chitosan/Ti 3 C 2 MXenes monolith via a facile, versatile and reproducible unidirectional “freeze-casting” method. Typically, the accumulation of Ti 3 C 2 MXenes directs the formation of aligned structure during the unidirectional freezing process and thus aligned macropores are formed by a subsequent freeze-drying process. By various physical characterization, the distribution of aligned macropores, micropores and specific surface area are determined to be 21 μm, 2.53 nm and 103.09 m 2 ·g −1 , respectively. In addition, monolith bed permeability is calculated to be 1.94 × 10 -12 m 2 , approximately 10 times than conventional monolith. Batch adsorptive experiments confirm that adsorptive capacities to bovine serum albumin and bovine hemoglobin are remarkably elevated on account of the high affinity of proteins onto those imbedding Ti 3 C 2 MXenes. Meanwhile, continuous mass transfer equation describes the aligned macropores facilitate the film mass transfer factor ([ k L a ] f ) in a separation process thus driving the global mass transfer factor ([ k L a ] g ). It is expected that the aligned porous Chitosan/Ti 3 C 2 MXenes monolith promises great potential for a continuous separation of proteins when a wholesale production is required.
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