ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Ning Li,Junhao Liu,Wenfang Zeng,Yawei Xu,Jing Li
In the domain of smart electronic devices, graphene films play a pivotal role due to their flexibility and high thermal conductivity. Within the realm of fabricating highly thermally conductive graphene films, Joule heating technology has garnered significant attention because of its capability for rapid temperature elevation and reduction of graphitization duration. However, substantial gas emission occurs during the reduction of graphene oxide films using this method, leading to immediate combustion and film fracturing, thereby limiting the rapid and uninterrupted production of graphene films. To address this challenge, a rapid reduction preparation process is introduced. This process initiates with a two-step reduction of graphene oxide films employing a reducing agent to establish gas escape pathways within the graphene films beforehand. Subsequently, the film is pressurized and Joule-heated using a graphite plate, with the entire heating process lasting only 800 s. The resulting graphene film exhibits a remarkable thermal conductivity of up to 1012W/(m·K). This method enhances the production efficiency of high thermal conductivity graphene films and is expected to further reduce production costs.
研究领域:
材料科学
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电子工程
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DOI
PubMed
高影响因子
Applied Materials Today
·
2022
·
IF 8.663
Ping Yu,Zemin He,Yuzhen Zhao,Huimin Zhang,Haiquan Zhang,Zongcheng Miao,Wenbo Shen
As an important type of liquid crystal (LC)-based smart windows for indoor illumination/privacy protection switching and energy conservation, the LC devices from polymer dispersed liquid crystals (PDLCs) have gained more attention for developing flexible intelligent optical films. However, higher voltages are generally needed to drive these devices owing to the large content of polymers and the strong anchoring effect on mesogenic molecules, which not only induces the danger of use but also increases the energy consumption of the devices. In this work, a polymerizable zwitterionic compound, which has little problem with ion accumulation compared to typical electrolytes, is explored as a new class of coating. Zwitterion-treated LC devices are also fabricated using different processing methods. Both the addition of zwitterionic layers and the processing techniques have profound effects on the electric-optical performance of the resultant devices. The driving voltage of the devices is optimized from 58 V to 15–18 V (∼2.9 V/μm to ∼0.75–0.9 V/μm) and the contrast ratio is still above 200. The haze of the optimized flexible smart film is about 89.78% and 5.38% in field-off and field-on states respectively. The electrically switchable transmittance of the flexible zwitterion-treated LC devices is also implemented on windows and the human body. Such a method offers a simple strategy for fabricating the LC devices promising for applications in wearable devices as well as in low-energy-consumption smart windows.
研究领域:
材料科学
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光学工程
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能源技术
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产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Yu Zhong,Yue Wu,Ruonan Zhu,Qixuan Lin,Xingjie Wang,Junli Ren,Huan Wang,Fengguang Du
Steam explosion pretreatment technology is one of the most widely used pretreatment technologies for biomass, but with the defects of high energy consumption and high cellulose loss. In this study, a low-energy pretreatment strategy was proposed for steam explosion of wheat straw coupling with screw extrusion and ultra-low acid spraying, and the corresponding relationship between different pretreatment conditions and steam explosion energy consumption was explored. The results showed that 93.8 % of cellulose was retained by screw extrusion and the addition of 0.1 % sulfuric acid spray under steam explosion (160 °C-5min, 0.618 MPa), accordingly, the enzymatic hydrolysis reaction for 72 h resulted in a cellulose enzyme degradation rate of 60.9 %. Compared with the control group (196 °C-5 min, 1.4 MPa), higher cellulose retention, was achieved at lower temperature and pressure, and the energy consumption decreased from 1.29 kJ/g to 1.15 kJ/g, which was a reduction of 10.89 %.
研究领域:
生物工程
·
可再生能源
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Zichao Yin,Yaping Pan,Mutai Bao,Yang Li
Carbonization of bio-based porous substrates is a facile, environmentally friendly and cost-effective way to create hydrophobic absorbents for oil/water separation applications. However, the processes usually take place under high temperature, which can cause large consumption of energy. Therefore, it is still a challenge to fabricate such absorbent under low temperature. Herein, a kind of superhydrophobic magnetic cotton was successfully fabricated by dip-coating of cotton with Fe 3 O 4 nanoparticles, adsorption of oleic acid and carbonization at 400 °C. The prepared absorbent was integrated with various excellent properties after modifications, including low apparent density (0.0436 g/cm 3 ), high porosity (92.2%), remote controllability, excellent thermal stability and outstanding hydrophobicity (water contact angle, 157.0 ± 1.8°). It could selectively collect oil from different types of oil/water mixtures with large absorption capacity (13.63–37.39 g/g for the testing oils) and high separation efficiency (higher than 99%). After removed the absorbed oil by distillation or direct combustion, the absorbent could be used again with no obvious performance deterioration. The proposed method offers an energy-saving way to fabricate oil absorbent via carbonization.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Jingwen Luo,Mingshuo Cui,Xiaodong Lian,Bin Yuan,Chenhao Song,Yingchao Ma,Yapei Wang
The multicomponent structure and the large area of oil–water interfaces make multiple emulsions promising for use in cosmetic manufacturing, food industries, and agricultural production. However, the high energy input and extensive use of emulsifiers in the process of multiple emulsion preparation severely limit their application. In this work, we propose a simple but highly efficient emulsification strategy to realize one-step multiple emulsions. To this end, the interfacial acid–base neutralization reaction by oleic acid and ammonia is employed as the driving force to construct a spontaneous emulsifying system, thus realizing emulsion formation in a low-energy manner. Moreover, the products generated by the interfacial neutralization reaction can act as emulsifiers to stabilize both the O/W and W/O interfaces and construct multiple emulsions with an O/W/O structure. Compared to conventional methods of multiple emulsion formation, the one-step multiple emulsion method driven by an interfacial neutralization reaction can significantly reduce the energy consumption and the emulsifier dosage during the emulsifying process, thus avoiding the probable environmental problems caused by the residual emulsifiers. This study not only provides a new idea for the preparation of multiple emulsions but also effectively promotes the development of low-surfactant emulsification methods.
研究领域:
化学工程
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材料科学
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食品科学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Tong Lyu,Zhaoyang Wang,Ruonan Liu,Kun Chen,He Liu,Ye Tian
Simple, low-cost, and high-performance atmospheric water harvesting (AWH) still remains challenging in the context of global water shortage. Here, we present a simple and low-cost macroporous hydrogel for high-performance AWH to address this challenge. We employed an innovative strategy of pore foaming and vacuum drying to rationally fabricate a macroporous hydrogel. The hydrogel is endowed with a macroporous structure and a high specific surface area, enabling sufficient contact of the inner sorbent with outside air and high-performance AWH. The experiments demonstrate that macroporous hydrogels can achieve high-performance AWH with a broad range of sorption humidity [relative humidity (RH) from 100% to even lower than 20%], high water sorption capacity (highest 433.72% of hydrogel’s own weight at ∼98% RH, 25 °C within 60 h), rapid vapor capturing (the sorption efficiency is as high as 0.32 g g–1 h–1 in the first 3 h at 90% RH, 25 °C), unique durability, low desorption temperature (∼50 °C, lowest), and high water-releasing rate (release 99.38% of the sorbed water under 500 W m–2 light for 6 h). The results show that this macroporous hydrogel can sorb water more than 193.46% of its own weight overnight (13 h) at a RH of ∼90%, 25 °C and release as high as 99.38% of the sorbed water via the photothermal effect. It is estimated that the daily water yield can reach up to approximately 2.56 kg kg–1 day–1 in real outdoor conditions, enabling daily minimum water consumption of an adult. Our simple, affordable, and easy-to-scale-up macroporous hydrogel can not only unleash the unlimited possibilities for large-scale and high-performance AWH but also offer promising opportunities for functional materials, soft matter, flexible electronics, tissue engineering, and biomedical applications.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
DOI
PubMed
高影响因子
LANGMUIR
·
2025
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IF 3.9
Fang Wang,Cheng Ma,Jianbin Huang
Emulsion systems that are independent of preparation conditions and time are ideal models for fundamental emulsion research. However, special strategies are required to form these emulsions, particularly with commonly used oils and emulsifiers that have proven to be more difficult. In this study, an efficient approach to preparing a low-energy emulsion with outstanding stability is reported. This approach is derived from a comprehensive study of the component composition in the residual emulsified fractions in water-separation emulsions. The outstandingly stable emulsion exhibits a highly stacked droplet structure, which can restrict the droplet movement within the disperse medium, accompanied by a stable oil–water interface layer, which can hinder the molecular exchange between droplets and resist droplet destruction under extreme conditions, thereby preventing the demulsification caused by sedimentation, coalescence, and Ostwald ripening. These peculiarities enable the emulsion to remain stable over long periods and at elevated temperatures, even exhibiting a spontaneous tendency to recover to the emulsion after centrifugal phase splitting. This approach lends itself to generalization in the context of multiple surfactants or oil phases, thus establishing a foundation for the study of various emulsifiers and functional emulsions. Moreover, the low-energy-input preparation can reduce energy consumption in the emulsion production, aligning with the principles of green development.
研究领域:
化学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-11
·
IF 17.694
Liu Jiaqi,Gong Jiangdong,Wei Huanhuan,Li Yameng,Wu Haixia,Jiang Chengpeng,Li Yuelong,Xu Wentao
Brain-inspired electronics require artificial synapses that have ultra-low energy consumption, high operating speed, and stable flexibility. Here, we demonstrate a flexible artificial synapse that uses a rapidly crystallized perovskite layer at room temperature. The device achieves a series of synaptic functions, including logical operations, temporal and spatial rules, and associative learning. Passivation using phenethyl-ammonium iodide eliminated defects and charge traps to reduce the energy consumption to 13.5 aJ per synaptic event, which is the world record for two-terminal artificial synapses. At this ultralow energy consumption, the device achieves ultrafast response frequency of up to 4.17 MHz; which is orders of magnitude magnitudes higher than previous perovskite artificial synapses. A multi-stimulus accumulative artificial neuromuscular system was then fabricated using the perovskite synapse as a key processing unit to control electrochemical artificial muscles, and realized muscular-fatigue warning. This artificial synapse will have applications in future bio-inspired electronics and neurorobots.
研究领域:
神经形态工程
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材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Zhangdi Li,Qiong Tian,Jicheng Xu,Shouzhen Sun,Ying Cheng,Fengxian Qiu,Tao Zhang
Effective cleanup of viscous crude oil spills remains a persistent and crippling challenge. Herein, this work presents a Joule-heated superhydrophobic flower-like Cu8(PO3OH)2(PO4)4·7H2O-coated copper foam (SHB-CF@CP) for rapid cleanup of viscous crude oil spills via a facile strategy. The SHB-CF@CP shows outstanding water repellency and excellent stability of hydrophobicity in harsh environments. Due to the high electrical conductivity and thermal conductivity, it requires lower power energy consumption (less than 1 V of voltage input) to raise the temperature significantly, which dramatically reduces the viscosity of crude oil (from ∼2 × 105 to ∼60 mPa s) and then increases the oil absorption rate, effectively avoiding the poor mobility and ineffective absorption of viscous crude oil. Notably, the SHB-CF@CP can achieve continuous and quick cleanup of crude oil under in situ pumping force. The high-performance Joule-heated SHB-CF@CP sorbent with a strong porous skeleton, corrosion resistance, and low predicted operational costs holds a promise of promoting its practical applications in the cleanup of intractable and large-area viscous oil spills.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2020
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IF 2.87
Fengqing Xiong,Danni Chen,Chenglong Ma,Limei Cao,Ji Yang
Electrochemical oxidation has been considered as an efficient method to degrade pharmaceuticals and personal care products. Maintaining low power consumption while increasing the number of oxidation intermediates is deserving of exploring. Herein, Ti/SnO2–Sb/Zr0.3Ir0.7O2 was prepared by Zr doped into IrO2 and used for Sulfamethoxazole (SMX) degradation. The addition of Zr significantly increased the electrochemically active area and facilitated the catalyst to degrade SMX dramatically at a lower overpotential. The extremely outstanding lifetime of catalysts can reach 800 h during the accelerated life test, which showed excellent stability and developmental prospects. The overpotential at 10 mA·cm–2 is about 329 mV, indicating that this electrode has a high oxygen evolution reaction activity. Furthermore, the electrical efficiency per log order for the electrode is only 8.50 kW h m–3 at 4 V. Our research provides new anode electrochemical catalysts for the degradation of organic pollutants.
研究领域:
环境科学
·
材料科学
·
电化学工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xiangzhi Xue,Zheng Liang,Jian Zhou,Huiqin Zhang,Qilin Gu,Zhaoxiang Zhong,Weihong Xing
Brine purification process using ceramic membrane has the advantages of short process, high filtration precision, low cost and long life. Silicon carbide (SiC) ceramic membranes are featured by excellent hydrophilicity and unique negatively charged surface. This work focused on the application of low-temperature reaction bonded SiC membranes in brine purification, and commercial SiC membranes prepared by the recrystallisation method were also adopted for comparison. Under low-energy conditions (transmembrane pressure ≤0.1 MPa, crossflow velocity ≤2 m·s -1 ), the low-temperature reaction bonded SiC membranes exhibited higher stable flux and superior antifouling performance (i.e., lower flux decline), attributed to the formation of a cake layer on the membrane surface. However, at high pressures (>0.1 MPa) and velocities (>2 m·s -1 ), some precipitated particles entered the pores of reaction bonded SiC membranes, resulting minor pore blockage, reducing permeability. Interestingly, the gradually increased initial permeate flux observed in cycling filtration was attributed to the increased surface hydrophilicity of SiC membranes. Therefore, low-temperature reaction bonded SiC membranes can provide a high-efficient and energy-saving brine purification process in the chlor-alkali industry.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Hui-Ye Jiang,Guo-Li Chen,Yu-Ying Xin,Shi-Kai Shen,Zhao-Peng Deng,Ying-Ming Xu,Li-Hua Huo,Shan Gao
The fabrication of low-temperature and high-response WO 3 -based gas sensor is very important for effective detection of hazardous nitric oxide , but the less association has been reported to date. Herein, cheap absorbent cottons were simply soaked into ethanol solution of tungsten hexachloride , and then the immersed template was calcined for preparing WO 3 materials with tubular morphology. Among, WO 3 -600 microtubules obtained by calcining at 600 °C are formed by the inter-linkage of nanoscale particles with better crystallinity , and possess small-size mesopores , low initial resistance and large specific surface area , as well as rich oxygen vacancy defects. Their synergism ensures its high sensing ability to ppb-level NO at low energy consumption. At lower 92 °C, WO 3 -600 sensor realizes a response value ( S = R g/ R a, R g and R a being the resistances in tested gas and air) of 167.1 toward 1 ppm NO gas, being higher than vast majority of reported WO 3 -based NO sensors. At the meantime, the sensor also possesses characteristics of fast recovery (13 s, the time for the change from R g to 10 % R g + 90 % R a), low actual detection concentration (50 ppb) and theoretical limit of detection (45 ppb), large sensitivity (the slope of calibration curve between sensor response and gas concentration) of 170.1 ppm −1 during 50–1000 ppb concentrations, as well as good selectivity , reproducibility, moisture tolerance and 60 days’ stability. In addition, we also analyzed the enhanced NO sensing mechanism.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）