JOURNAL OF FOOD ENGINEERING
·
2024
·
IF 5.3
Guangyuan Jin,Qingyu Zheng,Zhengshan Zhu,Chunfang Song,Zhenfeng Li,Feihu Song,Jing Li,Boru Chen
To address the need for enhanced biochemical reactions and overcome the shortcomings associated with passive and active mixer fabrication, reactor designs must utilize the coupled mixing concept to address the lack of insufficient heat and mass transfer through notable alterations of the physical properties. This study introduces a tubular microwave reactor based on chaotic flow dynamics, attempting to combine the concept of active and passive mixing to stimulate the development of eddy and secondary flows through electromagnetic fields and geometric disturbance enhance heat and mass transfer. Experiments and simulation analysis validate the validity of the prediction model, and reveal the fluid flow, mixing, electromagnetic and thermal characteristics and their synergistic mechanism, and shows the potential to enhance the mass and heat transfer performance at low Reynolds number, which provides a new idea for the design of chemical reactors and biological analysis.
研究领域:
化学工程
·
生物分析
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 18
·2206189
·
IF 13.3
Hanye Xing,Yonghong Song,Hao Xu,Sheng Chen,Kangkang Li,Liang Dong,Bao Wang,Jingzhe Xue,Yang Lu
Macroscopic 3D porous materials are ideal solar evaporators for water purification. However, the limited sunlight intensity and penetrating depth during solar-driven evaporation cannot prevent the biofouling formation by photothermal effect, thus leading to the deterioration of evaporation rate. Herein, a magnetic heating strategy is reported for anti-biofouling solar steam generation based on a magnetic silk fibroin (SF) scaffold with bi-heating property. Under one sun, the solar-heated top surface of magnetic SF scaffolds accelerates water evaporation at 2.03 kg m −2 h −1 , while the unheated inner channels suffer from the formation of biofilm. When exposed to alternating magnetic field (AMF), the magnetic SF scaffold can be integrally heated, leading to an efficient inner temperature to prevent biofouling in channels for water transportation. Accordingly, magneto-heated scaffolds show steady water evaporation rates after exposure to S. aureus and E. coli , which maintained 93.6–94.6% of original performance. In contrast, the evaporation rates of the scaffolds without AMF treatment are reduced to 1.31 ( S. aureus ) and 1.32 ( E. coli ) kg m −2 h −1 , decreased by 35.5% and 35.0%, respectively. In addition, the magneto-heated scaffold inhibits biofouling formation in natural lake water, maintaining 99.5% original performance.
研究领域:
材料科学
·
环境科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2018
·
IF 3.046
Junzhang Wang,Mingxiu Fan,Xiufang Bian,Mengchun Yu,Tianqi Wang,Shuai Liu,Yinghui Yang,Yuan Tian,Rongzhang Guan
Magnetic heating and thermal conductivity of magnetic nanofluids (MNFs) are of great interest for biomedicine and electronic heat transfer. Here, we report the enhanced magnetic heating efficiency and thermal conductivity of MNFs fabricated by amorphous FeZrB nanoparticles with high saturation magnetization and good magnetothermal stability. Under external magnetic fields, the viscosities of FeZrB MNFs are almost twice that of Fe 3 O 4 MNFs, enhancing the field-driving force in heat transfer applications. Under 250 Oe alternating current fields, the required time of heating FeZrB MNFs to the hyperthermic temperature (45 °C) is only 16.5% that of Fe 3 O 4 MNFs, amplifying the specific absorption rate of the magnetic nanoparticles by about 2.4 times. Benefiting from the higher thermal conductivity of amorphous, the thermal conductivity enhancement for FeZrB MNFs is also larger than that of Fe 3 O 4 MNFs—up to 34.0% enhancement for silicone oil-based FeZrB MNF at φ = 2 vol%. This investigation of amorphous-nanoparticle-including MNFs shall shed light on the potential of utilizing amorphous nanoparticles to fabricate MNFs for biomedicine or heat management applications.
研究领域:
材料科学
·
生物医学工程
·
热能工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Hang-bo Zheng,Yuan-li Wang,Jia-wei Xie,Peng-zhao Gao,Dong-yun Li,Evgeny V Rebrov,Hang Qin,Xiao-pan Liu,Han-ning Xiao
Renewable electricity from splitting water to produce hydrogen is a favorable technology to achieve carbon neutrality, but slow anodic oxygen evolution reaction (OER) kinetics limits its large-scale commercialization. Electron spin polarization and increasing the reaction temperature are considered as potential ways to promote alkaline OER. Here, it is reported that in the alkaline OER process under an AC magnetic field, a ferromagnetic ordered electrocatalyst can simultaneously act as a heater and a spin polarizer to achieve significant OER enhancement at a low current density. Moreover, its effect obviously precedes antiferromagnetic, ferrimagnetic, and diamagnetic electrocatalysts. In particular, the noncorrected overpotential of the ferromagnetic electrocatalyst Co at 10 mA cm–2 is reduced by a maximum of 36.6% to 243 mV at 4.320 mT. It is found that the magnetic heating effect is immediate, and more importantly, it is localized and hardly affects the temperature of the entire electrolytic cell. In addition, the spin pinning effect established on the ferromagnetic/paramagnetic interface generated during the reconstruction of the ferromagnetic electrocatalyst expands the ferromagnetic order of the paramagnetic layer. Also, the introduction of an external magnetic field further increases the orderly arrangement of spins, thereby promoting OER. This work provides a reference for the design of high-performance OER electrocatalysts under a magnetic field.
研究领域:
能源材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Xueyan Wang,Xianfeng Liu,Zhong Liu,Wenying Cui,Shilong Gao,Jun Zhang,Tingting Fan,Seeram Ramakrishna,Yun-Ze Long
Rapid cleanup of highly-viscous oil spills the sea is eagerly desired while still remains a great challenge. Hydrophobic and lipophilic adsorbents are regarded as ideal candidate for oil spill remediation. However, traditional adsorbents are not suitable for viscous crude oil, which would block the porous structure and lead to poor adsorption efficiency. In this work, a non-contact responsive superhydrophobic SiO 2 aerogel blankets (SAB) with excellent magnetic and solar heating effect for efficient removal of viscosity oils under harsh environments was developed, via assembled MXene and Fe 3 O 4 /polydimethylsiloxane layer-by-layer along the SAB skeleton (Fe 3 O 4 /MXene@SAB). The Fe 3 O 4 /MXene@SAB exhibited excellent compression tolerance (compression stress 70.69 kPa), superhydrophobic performance (water contact angle 166°), and corrosion resistance (weak acid/strong base). Due to high water repellency and stable porous structure, the Fe 3 O 4 /MXene@SAB could successfully separate oil-water mixture, while with remarkable separation flux (1.50–3.19 × 10 4 L m −2 h −1 ), and separation efficiency (99.91–99.98 %). Furthermore, the responsive Fe 3 O 4 /MXene@SAB also showed outstanding magnetic-heating and solar-heating conversion efficiency, which could continuously separate high viscosity crude oil from seawater by pump even under relatively low magnetic fields and mild sun. The superhydrophobic blankets hold great promise for efficient treatment of heavy oil spills.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Jiacheng Yu,Changqian Cao,Shuo Liu,Yongxin Pan
The green remediation of crude oil spills is a global concern due to the high viscosity and low fluidity of such oil. Sorbents with heating functions are promising candidates for reducing the viscosity of crude oil and accelerating its cleanup. Herein, we introduce an eco-friendly sponge with the dual functionality of magnetic and photothermal heating for the rapid recovery of heavy oil spills with very high viscosity. The magneto-photothermal sponge was fabricated by the facile dip-coating of magnetoferritin (MPfFn) nanoparticles, polydopamine (PDA), and polydimethylsiloxane (PDMS) on a melamine sponge (MS). The resulting PDMS-MPfFn-MS exhibited excellent hydrophobicity and adequate flame-retardancy. Owing to the electromagnetic–thermal and photothermal conversion properties of the MPfFn/PDA coating, the surface of the functionalized sponge could be rapidly heated to 112.5 °C under alternating magnetic field ( f = 502.05 kHz, H = 10.5 kA m −1 ) or 81.9 °C under light illumination (1 kW m −2 ). The fast and continuous recovery of extremely highly viscous oil was realized by a combination of solar and magnetic heating with a vacuum pump, and the recovery rate reached 50.6 g h −1 cm −2 . The proposed approach integrates the safety and temperature controllability of magnetic heating and the energy-saving feature of solar heating, thereby serving as a new solution for addressing viscous crude oil spills.
研究领域:
环境科学
·
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 26
·2206798
·
IF 13.3
Yaoxing Wang,Xueqin Fan,Qiuyu Du,Ying Shang,Xueqi Li,Zhifeng Cao,Xuan Wang,Jian Li,Yanjun Xie,Wentao Gan
The oxygen evolution reaction (OER) has significant effects on the water-splitting process and rechargeable metal-air batteries; however, the sluggish reaction kinetics caused by the four-electron transfer process for transition metal catalysts hinder large-scale commercialization in highly efficient electrochemical energy conversion devices. Herein, a magnetic heating-assisted enhancement design for low-cost carbonized wood with high OER activity is proposed, in which Ni nanoparticles are encapsulated in amorphous NiFe hydroxide nanosheets (a-NiFe@Ni-CW) via direct calcination and electroplating. The introduction of amorphous NiFe hydroxide nanosheets optimizes the electronic structure of a-NiFe@Ni-CW, accelerating electron transfer and reducing the energy barrier in the OER. More importantly, the Ni nanoparticles located on carbonized wood can function as magnetic heating centers under the effect of an alternating current (AC) magnetic field, further promoting the adsorption of reaction intermediates. Consequently, a-NiFe@Ni-CW demonstrated an overpotential of 268 mV at 100 mA cm −2 for the OER under an AC magnetic field, which is superior to that of most reported transition metal catalysts. Starting with sustainable and abundant wood, this work provides a reference for highly effective and low-cost electrocatalyst design with the assistance of a magnetic field.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Xiangnan Zhang,Ke Shi,Yuning Liu,Yifan Chen,Kai Yu,Yingying Wang,Hong Zhang,Jie Jiang
Nanoplastics are an emerging topic and have attracted increasing attention due to their widespread existence and potential toxicity on living organisms. The challenges of analytical methods for nanoplastics hinder the deeper understanding of toxicological effects and risk assessment of nanoplastics. In this work, a custom-built electromagnetic heating pyrolyzer was coupled to mass spectrometry for the rapid analysis of nanoplastics. Nanoplastics/microplastics were collected on the heat-resisting filter papers, then directly decomposed into gaseous products in the pyrolyzer and analyzed by mass spectrometry . The polystyrene nanoparticles were used to verify the performance of mass-traced quantification, and recoveries of 106–121% and precision of 9% were obtained. As a proof-of-principle experiment, the saline solution packed by polypropylene infusion bottles was aged for simulating indoor sunlight storage, where nanoplastics/microplastics were analyzed. The abundance models of nanoplastics/microplastics in the saline infusion bottle with aging time were assessed from both quality and quantity, for the first time. Results showed that nanoplastics/microplastics in medical infusion products could be generated under indoor sunlight exposure, which needs more attention due to the potential health risks. The proposed electromagnetic heating pyrolysis-mass spectrometry could be a promising method for assessing nanoplastics/microplastics.
研究领域:
环境科学
·
分析化学
·
毒理学
✓ 已验证
DOI
PubMed
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2021
·
IF 4.158
Hailong Zhang,Bing Lin,Junlei Tang,Yingying Wang,Hu Wang,Hanlu Zhang,Jingyi Cao,Jian Hou,Mingxian Sun,Haibing Zhang
The barrier coating is the most important and effective method for corrosion protection. However, inevitable defects of various scales from micro to macro on coatings due to mechanical damage, aging, corrosive medium penetration, etc. will lead to coating failure. Usually, the damaged coating can only be removed and then recoated. At present, most of coatings are disposable coating and can not be recycled or healing repeatedly. In this paper, a supramolecular gel composite coating was prepared with ethyl cellulose, castor oil, mineral oil, and Fe 3 O 4 nanoparticle, which are bonded together by hydrogen bonds and Van Der Waals forces. This coating could be multiple healed in situ by an alternating magnetic field based on the electromagnetic heating effect of Fe 3 O 4 particles. The SEM/EDS results indicating that the best content of Fe 3 O 4 in coating is 10% for good dispersion. Under an alternating magnetic field, the composite coating can be uniformly heated through hysteresis loss, and starts to heal when the temperature of the composite coating reaches 80 °C. After self-healing process, the mechanical properties and corrosion resistance of the composite coating have almost no difference with the original intact coating. Since the supramolecular gel is bonded by hydrogen bonding and Van Der Waals forces, these bonds are opened when heated and recombined after cooling without any change of properties. Therefore, the microstructure of supramolecular gel composite coating has no significant change and the corrosion protection performance has not decreased after 10 times of healing.
研究领域:
材料科学
·
腐蚀工程
·
纳米技术
·
电磁材料
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Ke Shi,Hong Zhang,Yangzhongfu Yang,Yuelin Huang,Jikun Gao,Jiaqian Zhang,Guangfeng Kan,Yanxiao Jiang,Jie Jiang
Nanoplastics have attracted much attention due to their potential hazards. However, analysis of nanoplastics remains challenging. In this study, ionic liquid-assisted cloud-point extraction (IL-assisted CPE) was developed to enrich nanoplastics in the aqueous environment and further coupled with electromagnetic heating pyrolysis mass spectrometry. The use of trace ILs improves the extraction efficiency of CPE for nanoplastics. The effects of ILs (types, contents), nanoplastic properties (type, size), and environmental factors (aging time, humic acid content) were systematically investigated to evaluate the applicability. The limits of detection of poly(methyl methacrylate) (PMMA) and polystyrene (PS) were determined to be 1.78 and 2.67 μg/L, respectively. Real environmental samples including lake water, rainwater, and influent and effluent from wastewater treatment plant were analyzed with good accuracy (79.58–116.87%) and satisfactory precision (RSD ≤ 11.99%). A possible mechanism for ILs being absorbed into the ordered surfactant micellar and generating larger micelles to synergically enclose hydrophobic nanoplastics was proposed. This work provides a simple and efficient approach to the extraction and analysis of nanoplastics in aqueous environments.
研究领域:
环境科学
·
分析化学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
CEREAL CHEMISTRY
·
2024
·Vol. 101
·期 5
·1106-1117
·
IF 2.2
Yi Zhou,Xin Wu,Jinxin Shen,Daijun Yang,Qun Lu,Changjiang Long,Rui Liu
Background Black rice is rich in various nutrients, such as anthocyanins, which may undergo some changes during cooking. However, previous studies have been mainly focused on a single substance and paid less attention to the changes in overall nutrient components. Here, we performed widely targeted metabolomics analysis on the chemical compositional changes in a new black rice variety (‘Huamoxiang No.3’) under three cooking modes, including bottom heating (BH), induction heating (IH), and IH + pressure. Results Among the detected 1458 metabolites, 276 and 108 metabolites were differential metabolites after cooking and in three cooking modes, respectively. Cooking increased the contents of most peptides, phenolic acids, and organic acid compounds but significantly decreased those of lipids and flavonoids, particularly anthocyanins. However, phenolic acids such as chlorogenic acid, erucic acid, and p -coumaric acid increased significantly, possibly due to the release of bound phenols and degradation of flavonoids to phenolic acids, such as thermal degradation of C3G to protocatechuic acid and among the three heating modes, the IH + pressure mode resulted in the most significant changes. Conclusion Although cooking reduced the content of flavonoids and anthocyanins, the increase in phenolic acids and other substances contributed to the healthy effect of cooked black rice, and the content of these active substances increased more significantly in the IH + pressure mode.
研究领域:
食品科学
·
营养学
·
代谢组学
·
农业化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 22
·2111067
·
IF 19.924
Meixia Su,Wenda Zhou,Lin Liu,Mingyue Chen,Zhenzhen Jiang,Xingfang Luo,Yong Yang,Ting Yu,Wen Lei,Cailei Yuan
Eddy current is a magnetic field effect generated in alternating magnetic field (AMF), which could trigger continuous local heating, reducing the energy consumption without impairing the life of the catalyst or reactor. Unfortunately, the investigation of eddy current effect on transition metal disulfides (TMDs) electrocatalysis is still in its infancy, and its actual electrocatalytic applications has been impeded by the multilayered structure of traditional layered TMDs. Typically, the step pyramid MoS 2 , with a layer-by-layer stacking structure just like the silicon steel plate in the transformer, showing an inevitable interlayer potential barrier will suppress the generation of eddy current and cause low efficiency of magnetic heating. In this work, the designed screw pyramid MoS 2 can facilitate the formation of micro eddy current and maximize utilization of magnetic heating to boost electrocatalytic activity, benefiting from its eliminated interlayer potential barrier. This work provides a new thinking for the design of field-assisted electrocatalytic reactions and development of the advanced catalyst technology.
研究领域:
材料科学
·
电化学
·
纳米技术
·
催化
·
能量转换
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）