JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Weimin Cao,Zeru Shen,Jiayi Li,Jingyu Li,Yiying Zhao,Qingran Zhang,Qiang Liu
Electrochemical oxidation of glycerol into value-added chemicals represents a sustainable approach for not only valorizing biomass resources but also improving the energy efficiency of electrolysis by replacing the kinetically sluggish oxidation of water at the anode. Here, we present a nickel (oxy)hydroxide supported cobalt nanoneedle arrays catalyst (CoNA-NiOH/NF-2) for effective oxidation of glycerol. The loaded Co(OH) 2 forms more oxygen defects, increases the active sites, and enhances the performance of glycerol oxidation. The CoNA-NiOH/NF-2 catalyst significantly reduces energy consumption by achieving a current density of 10 mA cm −2 at a low voltage of 1.22 V vs. RHE, and 100 mA cm −2 at 1.42 V vs. RHE, which is approximately 240 mV lower than oxygen evolution reaction (OER). Additionally, the Faraday efficiency of formate generation reached 98 %. The growth of renewable energy sources will greatly benefit from this strategy, which calls for replacing anodic OER with biomass oxidation.
研究领域:
化学工程
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可再生能源
·
电化学
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产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Weihao Meng,Augustinus J.J. Kragt,Xiaowen Hu,Julia S. van der Burgt,Albertus P.H.J. Schenning,Yuchen Yue,Guofu Zhou,Laifeng Li,Ping Wei,Wenyu Zhao,Yong Li,Jingxia Wang,Lei Jiang
Photochromic smart windows have drawn increasing attention as an approach to improve building energy efficiency and enhance indoor daylight comfort. However, existing photochromic smart windows still block sunlight from entering the room on sunny winter days, causing additional energy consumption for heating. Herein, a dual-mode smart window is designed with decoupled photo and thermal functions by combining colorless Fe-doped WO 3 photochromic film with window rotation. Based on this, selective heating and cooling of the room between winter and summer is achieved while maintaining the daylight comfort benefits during all seasons. As a proof of concept, the smart window reduces the temperature of a model house by up to 7.9 °C in summer mode, while in winter mode the temperature is only reduced by 0.7 °C. The proposed seasonally adaptive dual-mode smart window obtains by window rotation overcomes the limitations of conventional photochromic smart windows, which not only achieves better energy efficiency but also retains improved daylight comfort. Furthermore, it demonstrates that the heat absorbed by the smart window can be harnessed to produce electricity through the integration of thermoelectric modules within the glazing, which enhances its impact on reducing energy consumption.
研究领域:
材料科学
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建筑节能
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光学工程
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产品关联
DOI
高影响因子
Small
·
2024
·Vol. 20
·期 43
·2401283
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IF 13
Shaohuang Chen,Dan Xu,Huiting Yin,Renliang Huang,Wei Qi,Rongxin Su,Kai Zhang
Fibrillated cellulose-based nanocomposites can improve energy efficiency of building envelopes, especially windows, but efficiently engineering them with a flexible ability of lighting and thermal management remains highly challenging. Herein, a scalable interfacial engineering strategy is developed to fabricate haze-tunable thermal barrier films tailored with phosphorylated cellulose nanofibrils (PCNFs). Clear films with an extremely low haze of 1.6% (glass-scale) are obtained by heat-assisted surface void packing without hydrophobization of nanocellulose. PCNF gel cakes serve here as templates for surface roughening, thereby resulting in a high haze (73.8%), and the roughened films can block heat transfer by increasing solar reflection in addition to a reduced thermal conduction. Additionally, obtained films can tune distribution of light from visible to near-infrared spectral range, enabling uniform colored lighting and inhibiting localized heating. Furthermore, an integrated simulation of lighting and cooling energy consumption in the case of office buildings shows that the film can reduce the total energy use by 19.2–38.1% under reduced lighting levels. Such a scalable and versatile engineering strategy provides an opportunity to endow nanocellulose-reinforced materials with tunable optical and thermal functionalities, moving their practical applications in green buildings forward.
研究领域:
材料科学
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建筑工程
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能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Zhuning Geng,Bo Liu,Guanghe Li,Fang Zhang
Electrical resistance heating (ERH) has been widely applied for contaminant remediation in heterogeneous sites especially when low permeability zones exist, yet requires high energy input. To address the low energy-efficiency of ERH using conventional alternating current (AC), pulsed direct current (PDC) obtained by current rectification was introduced for heating to enhance dense nonaqueous phase liquid (DNAPL) migration in low permeability zones. Here we showed the proof-of-concept in a lab-scale two-dimensional heterogeneous sand system (40 cm × 30 cm) with trichloroethylene (TCE) DNAPL in the central low permeability zone. Applying PDC achieved faster temperature increase compared to that with the conventional AC of the same voltage gradient. The overall TCE removal efficiency from the cell increased from 79.0% to 89.6% with increasing PDC voltage gradient from 3 to 3.75 V cm –1 , compared to that of 9.4–91.1% with conventional AC. The lowest energy consumption of PDC was 390 kWh kg –1 at a medium voltage gradient of 3.5 V cm –1 , which was 27.8% lower compared to that with AC at the same voltage gradient. These results suggest that remediation using pulsed direct current is a promising approach to improve the energy-efficiency and effectiveness of ERH.
研究领域:
环境工程
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污染修复
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岩土工程
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产品关联
DOI
PubMed
高影响因子
Energy Technology
·
2016
·Vol. 5
·期 3
·461-468
·
IF 2.557
Zheng Zhang,Wenbo Zhao,Jiejing Nong,Dong Feng,Yanhong Li,Yuan Chen,Jian Chen
Conventional amine scrubbing systems for carbon dioxide capture require a large amount of energy to regenerate the absorbent. Theoretically, if CO 2 -captured product can be separated from the liquid counterpart, and only this product need to be heated for desorption, the energy efficiency for CO 2 capture can be improved greatly. In the present work, diethylenetriamine (DETA) dissolved in ethanol, diethylene glycol dimethyl ether, N -methyl-pyrrolidone, or dimethyl carbonate can absorb CO 2 to result in liquid–solid phase-change in addition to making the reaction to achieve its stoichiometric maximum. The results show that the different organic solvents have no influence on the formation of precipitate. Single-crystal structure analysis indicates a DETA–carbamate is formed with equimolar CO 2 absorption. The absorption–desorption cycles using microwave heating shows that the system has a relatively stable cycling performance.
研究领域:
化学工程
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环境科学
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材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yongyang Zhu,Liming Zeng,Daifeng Wu,Renheng Tang,Qing Zhou
The lack of cost-effective regeneration techniques for LiBH 4 limits its large-scale applications for supplying hydrogen via hydrolysis. Now, we report a facile method to regenerate LiBH 4 by ball milling its real hydrolytic byproduct (LiBO 2 · x H 2 O) with cheap Al based reducing agents, instead of traditional Mg. Effective strategies are developed to promote the formation of LiBH 4 by introducing Li 2 O to enable the dense Al 2 O 3 to convert into LiAlO 2 on Al surface and break up passivation layers, and by partially replacing Al with Al-RE alloy to improve grinding and contacting efficiency of raw materials and facilitate the conversion from initial H + in LiBO 2 ·2H 2 O to final H ¯ in LiBH 4 . A yield of 10.4 % can be obtained for a relatively short ball milling time (10 h) for the Al-Al 2 Ce-Li 2 O-LiBO 2 ·2H 2 O system. Another advantage of this method is that the utilization of H + source in LiBO 2 ·2H 2 O improves energy efficiency and reduces the cost. This work broadens the species of reducing agents for borohydride regeneration and enriches its regeneration methods.
研究领域:
材料科学
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化学工程
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氢气储存
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产品关联
DOI
高影响因子
ENVIRONMENT INTERNATIONAL
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2021
·
IF 9.621
Chao Yang,Yiang Fan,Shanshan Shang,Pu Li,Xiao-yan Li
Electrochemical oxidation (ECO) is an appealing technology for treating emerging organic pollutants in wastewater. However, the conventional flow-by ECO process is expensive with a low energy efficiency owing to the limitations of mass transport of contaminants to the limited surface area of the anode. In this study, a novel freestanding porous and permeable SnO 2 -Sb anode was fabricated by one-step sintering using micrometer-sized (NH 4 ) 2 CO 3 grains as the pore-forming agents. This permeable SnO 2 -Sb anode without Ti substrate functioned as a reactive anodic filter (RAF) in an ECO cell to treat wastewater containing ciprofloxacin (CIP). Forcing the wastewater through the porous RAF depth-wise improved the mass transport and vastly enlarged the electroactive surface area. Compared with the conventional flow-by configuration, the flow-through RAF exhibited a 12-fold increase in the mass transfer rate constant (60.7 × 10 −6 m s −1 ) and a 5-fold increase in the CIP degradation rate constant (0.077 min −1 ). At a cell potential of 4.0 V, more than 92% of the CIP was degraded in a single-pass operation at a filtration flux of 54 L m −2 h −1 and a short retention time of 1.7 min through the RAF. The robustness and stability of the RAF were demonstrated by its remarkable CIP degradation efficacy of 99% during 200 h of operation. The mechanism of CIP degradation was examined using probe molecules and density functional theory calculations and found to be a combined effect of direct electron transfer and oxidation by generated radicals ( OH and SO 4 − ). The great potential of RAF in flow-through ECO was further validated by its effective removal (>92%) of various organic pollutants in actual municipal wastewater at a low energy consumption of 0.33 kWh m −3 . The RAF-based ECO process thus provides an advanced environmental technology for the oxidation of toxic and recalcitrant organic pollutants in wastewater treatment.
研究领域:
环境工程
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化学工程
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水处理
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产品关联
DOI
PubMed
高影响因子
International Journal of Greenhouse Gas Control
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2016
·
IF 4.064
Shufeng Shen,Yangyang Bian,Yue Zhao
High energy consumption for aqueous amine-based CO 2 capture process is still a major drawback limiting its commercial deployment. Most of heat is used for water vaporization during solvent regeneration for CO 2 stripping. Development of phase-changing solvents is an attractive energy-efficient method to reduce energy requirement. In this work, we have proposed potassium prolinate (ProK)/ethanol solution as a novel non-aqueous absorbent. Its physical properties and the rate of CO 2 absorption were investigated and compared with the aqueous ProK systems. Phase behaviours during CO 2 absorption and partition of CO 2 absorbed between liquid and solid phases were characterized. The main species in solid precipitates were identified as bicarbonate and proline salts by 13 C NMR and XRD. Moreover, the regenerated absorbents can remain relatively stable after absorption-desorption cycles.
研究领域:
化学工程
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Guokun Yang,Tianle Liu,Bo Qu,Shaojun Zheng,Zihan Zhang,Guosheng Jiang,Shitian Zhao,Shichen Wang,Changliang Fang
Microencapsulated phase change materials (MPCMs) have gained widespread application in energy-efficient buildings, aiming to improve thermal comfort and reduce energy consumption. To enhance the engineering feasibility of MPCMs, researchers are now focusing on developing MPCMs with multifunctional properties, beyond single thermal storage functionality. In this study, we proposed a novel and straightforward approach to fabricate multifunctional MPCMs with BaCO 3 as shell and a core composed of binary phase change materials (PCMs) and lipophilic-modified graphite (MG) via self-assembly method. The incorporation of BaCO 3 shell provides MPCMs with additional resistance to ionizing radiation pollution due to the high atomic number element Ba. Additionally, the incorporation of MG into PCMs enhances its temperature sensitivity. The thermal analysis indicates that the binary PCMs’ composition in MPCMs results in two phase transition temperatures at 3.3 °C and 26.4 °C, making them capable of thermal storage in line with comfortable residential temperatures across different seasons. Furthermore, MPCMs were introduced into cement paste (CPM) and used to construct cement chambers. Adding 10 wt% MPCMs in the CPM chambers placed outdoors in Wuhan (from June 7th to June 9th) led to a 23.8 % decrease in temperature fluctuations compared to the reference sample. Radiation shielding results indicated that the linear attenuation coefficient (μ) of CPM increased by 58.7 %, due to enhanced incoherent scattering and photoelectric effects between high atomic number elements and photons. Additionally, XCOM simulations predicted a strong correlation between MPCM content and μ values, with particularly high accuracy at low photon energies. Overall, the multifunctional MPCMs developed in this study not only offers a new route for reducing residential energy consumption and shielding ionizing pollution, but also broadens the applicability of traditional PCMs in the building and other fields.
研究领域:
材料科学
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建筑技术
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能源工程
·
辐射物理
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Kaibin Zheng,Xifan Fu,Yongshun Ren,Zehua Yu,Zhi Huang,Jing Li,Yuncheng Peng,Chaoji Chen,Kang Liu
With the explosive growth of photovoltaic (PV) power station, the energy efficiency and ecological impact of which have emerged as two important points of great concern. In this work, an approach is proposed to cool solar panels and facilitate ecological restoration by engineering moisture cycle in PV plants with an all-polymer hydroscopic felt. Formed by fibers with highly oriented polyethylene (PE) micro-fiber cores and polyacrylamide (PAAm) shells of a few microns in thickness, the felt is ultra-light, anti-corrosive, and demonstrates a high passive heat transfer coefficient of 1100 W m −2 K −1 . Under the solar light of one sun, the felt reduces the temperature of solar cells by 28 °C, and increases the output power by 20.4%. Moreover, the felt regenerates to the original state in only 1.3 times the evaporation time. In addition, due to the high evaporation and moisture absorption rate, the PE/hydrogel felt exhibits the ability to raise the ambient humidity in photovoltaic plants by 24% and lower the ambient temperature by 2.6 °C, which significantly promotes the survival rate of surrounding flora. These results show the ability of the all-polymer hydroscopic felt in promoting energy efficiency of PV conversion and offers the potential to augment ecological restoration using PV plants.
研究领域:
可再生能源
·
材料科学
·
环境工程
·
太阳能技术
·
高分子科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Xiangjuan Ma,Yan Yan,Qizhou Dai,Jianxian Gao,Shengjue Liu,Yijing Xia
This study focused on the electrochemical oxidation of Acid Blue 9 (AB 9) under direct and pulse current modes using a Ti/SnO 2 -Sb/α,β-Polytetrafluoroethylene-Fe-PbO 2 (PTFE-Fe-PbO 2 ) anode. The results showed that 99.0% of AB 9 and 68.9% of COD could be eliminated at initial pH of 5, initial AB 9 concentration of 100 mg L -1 , pulse frequency of 4000 Hz, current density of 20 mA cm −2 and pulse duty cycle of 50% after 120 min of electrolysis. The pulse electrochemical oxidation of AB 9 at the investigated conditions followed pseudo-first-order kinetics. Compared with the direct current mode, 76.0% of energy consumption could be saved at pulse current mode. The effect of mass transfer and electrode distance on the pulse electrochemical oxidation of AB 9 was also investigated in terms of mass transfer coefficient and effectiveness factor, the results showed that the reduced electrode distance was beneficial to improve the mass transfer and oxidation efficiency, as well as the energy efficiency. LC-MS analysis revealed that benzenesulfonate group, C-N and C-S bonds in AB 9 molecule were initially cleaved under the attack of ⋅OH, then some carboxylic acids were formed and eventually mineralized to CO 2 and H 2 O. Therefore, pulse electrochemical oxidation with a PTFE-Fe-PbO 2 electrode might be a promising alternative to enhance the practicability of electrochemical treatment for dye wastewater.
研究领域:
环境工程
·
电化学
·
废水处理
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2023
·
IF 11.4
Zhi Yang,Dawei Li,Kaijie Yang,Lei Chen,Jian Wang,Xiaoying Zhu,Baoliang Chen
Solar desalination has shown great potential in alleviating global water scarcity. However, the trade-off between energy efficiency and salt rejection remains a challenge, restricting its practical applications. In this study, we report a three-dimensional nitrocellulose membrane-based evaporator featuring a high evaporation rate (1.5 kg m–2 h–1) and efficient salt precipitation at the edges. Additionally, the salt is isolated from the photothermal area of the evaporator and falls automatically with a salt recovery rate of 97 g m–2 h–1 in brine with 10 wt % salt content. The distinctive performance is attributed to the precise water supply control, which was adjusted by changing the resistance force and driven force in the evaporator. With a high evaporation rate, stable performance, and specific salt recovery ability, this solar evaporation structure holds great potential in water desalination and resource recovery.
研究领域:
环境科学
·
水资源
·
海水淡化技术
·
可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）