Advanced Energy Materials
·
2024
·
IF 24.4
Yuchen Li,Shuaihua Wang,Mao Yu,Huan Li,Benben Li,Kang Zhu,Weishu Liu
Gel-based ionic thermoelectric (i-TE) cells provide alternative thermal energy harvesting from the environment, showing obvious advantages in voltage matching for self-powered Internet-of-Things (IoT) sensors. However, the gel-based i-TE cells always suffer a long thermal charging time and poor output power performance. Herein, a multilayer electrode engineering strategy is proposed from the device-design level, aiming to decrease the ions' diffusion distance, increase the electrode surface area, and facilitate the ions' reaction and recovery process. The thermal charging time is shortened from 27 to 8 min as the electrode layers increase from 2 to 8. An ultrahigh instantaneous power density of 15.8 mW m −2 K −2 and 2 h output energy density ( E 2h ) of 403 J m −2 are achieved in an 8-layer electrode i-TE cell. Finally, A flexible and wearable i-TE device with 20 units is demonstrated to generate a remarkable voltage of 3.8 V and output power of 282 µW by harvesting the human body heat. This work provides a feasible and effective route to design the i-TE device, hopefully promoting its practical power generation application.
研究领域:
材料科学
·
能源工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Lihong Zhang,Siyi Ren,Chaowen Chen,Dongfang Wang,Bin Liu,Dongqing Cai,Zhengyan Wu
A near infrared light (NIRL)-driven release imidacloprid (NDRI) with magnetic collectability property was constructed using agarose hydrogel (AG), CuS-polydopamine (CP), zeolitic imidazolate framework-8 (ZIF-8), imidacloprid (IM), and ferriferrous oxide (Fe 3 O 4 ). Therein, ZIF-8 with a large specific surface area was used to efficiently load IM molecules. CP, as a photothermal agent, could soften AG and enlarge the pores in hydrogel spheres under NIRL, resulting in the release of IM. After release, Fe 3 O 4 was beneficial to conveniently collect the remaining NDRI from water. Additionally, the AG hydrogel with a porous structure acted as a good carrier for NDRI. Importantly, NDRI possessed an outstanding controlled-release property and could be reutilized at least for four times. Consequently, this technology may provide a potential approach to control release of IM, improve utilization efficiency, and decline pesticide usage and contamination to environment.
研究领域:
材料科学
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环境科学
·
农业
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DOI
高影响因子
Energy & Environmental Science
·
2022
·Vol. 15
·期 12
·5379-5390
·
IF 39.714
Yuchen Li,Qikai Li,Xinbo Zhang,Jiajia Zhang,Shuaihua Wang,Liuqin Lai,Kang Zhu,Weishu Liu
Quasi-solid-state ionic thermoelectric (i-TE) cells have attracted increasing interest due to their high thermopower and easy solution processability for flexible and wearable thermoelectric devices. However, many i-TE gels have drawbacks of a narrow working temperature range (ΔTmax) and low power density. In this study, we introduced glutaraldehyde into the gelatin-KCl-FeCN4−/3− matrix, forming strong covalent bonds and interconnected porous structures, which significantly improve ΔTmax from 9 °C to 23 °C. The formed gelatin/GTA polymer network increases the entropy difference between the redox couples of FeCN4−/3−, thereby enhancing its thermopower. For the first time, a high thermopower of 24.7 mV K−1, a record-high power density of 9.6 mW m−2 K−2 and a 2 h energy density (E2h) of 198 J m−2 are achieved simultaneously in a quasi-solid-state i-TE cell. The i-TE cell exhibits good cycling performance in long-term power generation, corresponding to an average E2h value of 175 J m−2 after the whole cycling process. A flexible and wearable device consisting of 16 i-TE cells can generate a high voltage of 3.6 V and an output power of 115 μW by harvesting body heat. This work provides a general route to increase the working temperature range and output power density of gel-based i-TE cells through a molecular-level approach.
研究领域:
材料科学
·
能源技术
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Zhen Su,Yushu Li,Jiguang Li,Xincun Dou
Onsite ultrasensitive identification of the airborne or deposited perchlorate particulates is crucial for homeland security, forensic analysis, and environment monitoring. However, few of the currently developed luminescent sensor focus on the direct and ultratrace detection of its solid particulates as the low level of analyte and the difficulty in exhaustive collection of the trace sample. Here, a general design strategy for the direct, ultrasensitive, and specific luminescent turn-on sensing of perchlorate particulates is proposed by triggering supramolecular self-assembly of cationic platinum(II) complex in a hydrogel matrix, in which the self-assembly of platinum(II) complex endows the luminescence turn-on response and the hydrogel matrix creates excellent confinement effect for terminating the diffusion of generated luminescent 1D aggregates. The proposed hydrogel-based sensor is capable to detect the airborne perchlorate particulate of 1.12 ng by naked eye and 0.11 fg by common optical microscope. Further practical sensing performances for real firecracker and buried perchlorate in soil demonstrates the excellent environmental adaptability, and the latent fingerprint visualization shows great potential for clue tracking. This study provides an inspirable strategy for designing ultrasensitive luminescent sensor for trace solid sample.
研究领域:
分析化学
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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
Additive Manufacturing
·
2023
·
IF 11
Yitian Yang,Zhihua Yang,Xiaoming Duan,Peigang He,Delong Cai,Dechang Jia,Yu Zhou
Additive manufacturing of ceramic materials has gained the significant attention due to its ability to flexibly fabricate customizable ceramics with complex structures. However, large-size advanced ceramics are still difficult to be fabricated by additive manufacturing, especially for the thin-wall structures. Here, a strategy for fabricating large-size Si 3 N 4 ceramic via the materials extrusion process using the long-term stable hydrogel-based suspensions is reported. We establish a mechanism to analyze the rheology relation between the ceramic suspensions and the carboxymethyl cellulose (CMC) hydrogels. The deformation of filaments under gravity is simulated by the computational fluid dynamics (CFD) model, further the effects of the shear-thinning behavior close to the filament surface and the evaporation rate for suspensions with different solid content on the final shape of the filaments are investigated. We finally printed a single-wall cone component with a height of 180 mm, a diameter of 90 mm, and a wall thickness of 1.8 mm by the suspension containing a pseudoplastic CMC hydrogel.
研究领域:
材料科学
·
先进制造
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DOI
高影响因子
Food and Bioprocess Technology
·
2017
·Vol. 10
·期 10
·1844-1853
·
IF 2.576
Ye Youxin,Zhu Mingjin,Miao Keyan,Li Xinying,Li Defu,Mu Changdao
Antimicrobial activity is an attractive property for packaging materials which can extend the shelf life of products and provide microbial safety for consumers. The study aimed to analyze the physicochemical and antimicrobial properties of gelatin-based edible films containing trans -anethole as the active additive. Encapsulation with β-cyclodextrin was used as an effective way to introduce trans -anethole into gelatin matrix. The results showed that the trans -anethole/β-cyclodextrin inclusion complex could be evenly dispersed in the gelatin-based edible films with appropriate addition. The incorporation of trans -anethole conferred the edible films with good antimicrobial activity as expected, which increased with the content of trans -anethole increasing. Moreover, the addition of inclusion complex improved the tensile strength and surface hydrophobicity and reduced the moisture content of the edible films. It was interesting that the edible films presented great UV light barrier property and it was increased by the addition of inclusion complex. Overall, the antimicrobial gelatin-based edible films showed great potential as bioactive packaging materials to extend food shelf life.
研究领域:
食品科学
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包装材料
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生物技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Dezhi Feng,Chengtao Xu,Biao Ma,Chao Zhao,Hong Liu
Chemically synthesized DNA has been considered a promising medium for data storage. Among various methods, electrochemical synthesis is simple and easy to miniaturize, attracting much attention. However, conventional DNA synthesis uses phosphoramidite chemistry involving multi-step liquid-phase reactions and complicated liquid manipulation, restricting scalability and practical application. Here, we report the quasi-solid-state electrochemical DNA synthesis based on gels. All reagents required for different synthesis steps are contained in separate gels without mixing or dilution. Instead of complicated liquid manipulation, DNA synthesis on the electrode requires only relative motion between the electrode and gels. Similarly, blank gels with only acetonitrile are reused to clean the electrode surface without washing with plenty of liquid. We demonstrate our method is scalable using an electrode array for parallel DNA synthesis.
研究领域:
数据存储
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电化学
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分子生物学
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生物技术
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DOI
高影响因子
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
·
2022
·Vol. 103
·期 8
·3812-3821
·
IF 4.125
Jing Zhang,Lulu Dong,Qianwang Zheng,Jie Xiao,Yong Cao,Yaqi Lan
BACKGROUND There is increasing interest in the development of oleogel-based emulsions. However, they usually contained surfactants for stabilization, especially small-molecular weight surfactants, which may have adverse health impacts. RESULTS Herein, a surfactant-free oleogel-based emulsion stabilized by co-assembled ceramide/lecithin (CER/LEC) crystals was developed. The formation and stabilization mechanisms were explored. The different molar ratios of gelator (LEC and CER) in emulsions resulted in different crystal morphology, crystallinity as well as different emulsion properties. This suggested that appropriate crystallinity, crystal size, and interfacial distribution of these crystals provided higher surface coverage against droplets coalescence, thus better emulsion stabilization. Both X-ray diffractograms and contact angle results confirmed that the crystals which were primarily responsible for emulsion stabilization, are co-assembled crystals consisted of both gelators (CER and LEC). Furthermore, the percentage of free fatty acids (FFAs%) results revealed a negative relationship between lipid digestibility and crystal concentration. CONCLUSIONS This strategy greatly enriched surfactant-free oleogel-based emulsion formulations, as well as their potential applications in healthy lipid-based products and novel food delivery systems with controlled lipid digestibility. © 2022 Society of Chemical Industry.
研究领域:
食品科学
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材料科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Xiaoxia Liu,Sa Yang,Yanli Cheng,Donglei Wei,Hou Chen,Liangjiu Bai,Wenxiang Wang,Huawei Yang,Lixia Yang,Kun Yin
A hydrogel-based photocatalyst is synthesized by the construction of a hydrogel skeleton using common monomers and subsequent in situ generation of Zn–Cu–S photocatalyst particles. The photocatalytic degradation performance of the hydrogel-based photocatalyst is systematically studied, and the photocatalyst exhibits good removal ability for eosin Y. The composite photocatalyst shows high efficiency at low loading, with a removal rate of up to >98% in 3 hours under sunlight irradiation, without the need for a preliminary dark adsorption process. High removal efficiency was observed, remaining above 95% even after 10 recycling runs, demonstrating the excellent stability of the composite photocatalyst. We thus provide a facile method to construct hydrogel-based photocatalysts that show high application potential in the photocatalytic removal of eosin Y.
研究领域:
环境科学
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材料科学
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化学工程
·
光催化
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DOI
高影响因子
Gels
·
2024
·Vol. 10
·期 12
·808
·
IF 5
Feng Li,Ruoxi Yang,Jian Xu,Guohai Xu,Ye Wu
The concentration of small molecules reflects the normality of physiological processes in the human body, making the development of simple and efficient detection equipment essential. In this work, inspired by a facile strategy in point-of-care detection, two devices were fabricated to detect small molecules via photocurrent measurement. A linear response of the photocurrent against the concentration of the small molecules was found. In the first device, metal ions were introduced into gel substrates made by xanthan gum to enhance photocurrent response. N-phenyl-2-naphthylamine was measured when iron or manganese ions were used. L-Phenylalanine was measured when the gel was modified by samarium, iron, cerium, or ytterbium ions. L-(+)-Arabinose was detected via the gels modified by iron or holmium ions. D-(+)-Mannose was detected when the gel was modified by ytterbium, manganese, chromium, or sodium ions. L-Methionine was detected in the gels modified by samarium, zinc, or chromium ions. The second device was based on a paper sheet. A sugar-like molecule was first synthesized, which was then used to modify the paper. The detection was possible since the photocurrent showed a linear trend against the concentration of D-Trehalose. A linear fit was conducted to derive the sensitivity, whose value was found to be 5542.4. This work offers a novel, simple, and environmentally sustainable platform that is potentially useful in remote areas lacking medical devices.
研究领域:
生物医学工程
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分析化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yan Zhu,Bo Liang,Jijia Zhu,Zhibin Gong,Xiping Gao,Dahu Yao,Jing Chen,Chang Lu,Xinchang Pang
Avoiding crosstalk between strain and temperature detection is crucial for bimodal hydrogel sensors, yet achieving high sensitivity for both parameters while maintaining signal decoupling remains a significant challenge. In this study, a bimodal sensor was developed by locally coating poly (3,4-ethylene dioxythiophene): polystyrene sulfonate (PEDOT: PSS) onto the hydrogel surface, creating distinct regions for strain and temperature detection. These regions form localized strain concentration zones and wrinkle structures, respectively. The localized strain concentration enhances the sensor’s sensitivity from 8.5 to 18.5. Additionally, the sensor demonstrates a low detection limit (0.2 %), a wide detection range (up to 1356 %), a fast response time, and excellent cyclic stability for strain measurements. The temperature detection region, leveraging the thermoelectric effect, improves the Seebeck coefficient of the PEDOT: PSS coating from 20 to 122.86 μVK −1 through de-doping and energy band modulation. Moreover, the temperature sensing of the PEDOT: PSS coating features good cyclic stability, a rapid response time, and versatile testing capabilities. This innovative structural design effectively decouples strain and temperature signals across a broad strain range (0–600 %). These sensors hold potential applications in human health monitoring and as electronic skin for flexible robotics.
研究领域:
材料科学
·
传感器工程
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生物医学工程
·
柔性电子学
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产品关联
DOI
PubMed
高影响因子
Biosensors-Basel
·
2024
·Vol. 14
·期 6
·280
·
IF 4.9
Wei Wei,Zhaoxun Wang,Bingnan Wang,Wei Pang,Qingrui Yang,Xuexin Duan
The µTAS/LOC, a highly integrated microsystem, consolidates multiple bioanalytical functions within a single chip, enhancing efficiency and precision in bioanalysis and biomedical operations. Microfluidic centrifugation, a key component of LOC devices, enables rapid capture and enrichment of tiny objects in samples, improving sensitivity and accuracy of detection and diagnosis. However, microfluidic systems face challenges due to viscosity dominance and difficulty in vortex formation. Acoustic-based centrifugation, particularly those using surface acoustic waves (SAWs), have shown promise in applications such as particle concentration, separation, and droplet mixing. However, challenges include accurate droplet placement, energy loss from off-axis positioning, and limited energy transfer from low-frequency SAW resonators, restricting centrifugal speed and sample volume. In this work, we introduce a novel ring array composed of eight Lamb wave resonators (LWRs), forming an Ultra-Fast Centrifuge Tunnel (UFCT) in a microfluidic system. The UFCT eliminates secondary vortices, concentrating energy in the main vortex and maximizing acoustic-to-streaming energy conversion. It enables ultra-fast centrifugation with a larger liquid capacity (50 μL), reduced power usage (50 mW) that is one order of magnitude smaller than existing devices, and greater linear speed (62 mm/s), surpassing the limitations of prior methods. We demonstrate successful high-fold enrichment of 2 μm and 10 μm particles and explore the UFCT’s potential in tissue engineering by encapsulating cells in a hydrogel-based micro-organ with a ring structure, which is of great significance for building more complex manipulation platforms for particles and cells in a bio-compatible and contactless manner.
CAS / MDL:
研究领域:
微流控
·
生物医学工程
·
生物分析
·
组织工程
·
声学设备
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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）