CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Yueqian Liu,Yu Rong,Yuanjin Zeng,Jiangkai Bao,Zhuqun Shi,Chuanxi Xiong,Quanling Yang
The TEMPO-oxidized cellulose nanofibril (TOCN) is a green, renewable, recycled material with high performance developing natural, environmentally friendly triboelectric materials. However, the performance of natural polymer triboelectric materials needs to be further improved. In this work, a novel high-performance TOCN-based triboelectric material was prepared and enhanced by increasing oxygen-rich groups and porous structure by regulated TEMPO-mediated oxidation and direct freeze-drying process. Oxygen-rich groups and porous structures synergistically boosted the surface charge density of the material during contact separation to enhance the triboelectric output performance. The open-circuit voltage of the triboelectric nanogenerator (TENG) was realized to be enhanced by 36 % and 84.5 %, respectively, with the power density up to 1.003 W/m 2 . Meanwhile, finite element analysis calculations further verified that the oxygen-rich groups help to increase the surface charge density of the material and make electron transfer easier. This study provides a new strategy for preparing high-performance, environmentally friendly, biocompatible biomass triboelectric materials.
研究领域:
材料科学
·
能源与环境科学
✓ 已验证
产品关联
DOI
高影响因子
NANO LETTERS
·
2025
·
IF 9.1
Wei Deng,Yufeng Zhu,Kelan Zhang,Yuxuan Yuan,Tao Hu,Xiao Wang,Jidong Li,Xuemei Li,Zhuhua Zhang,Wanlin Guo,Jun Yin
Collective behavior enables groups of organisms to achieve feats far exceeding individual capability. Inspired by this, we present a novel droplet-based electricity generator that leverages the collective dynamics of multiple water droplets to significantly enhance electrical output, achieving orders of magnitude improvement compared with single-droplet devices. It is revealed that grouped water droplets, although spatially separated, coordinate via charge exchange with a solid surface and external charge transfer. Consequently, the solid surface charge density is significantly enhanced, elevating the charge transfer. This collective effect readily generates peak voltages exceeding one kilovolt, sufficient for air ionization and nitrogen fixation, with potential applications in nutrient production. We anticipate that this collective strategy will significantly advance the design and applications of droplet-based hydrovoltaic devices.
研究领域:
能源科学
·
材料科学
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物理学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 24
·11966-11975
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IF 11.301
Guixiang Xie,Xiya Yang,Jialong Duan,Yanyan Duan,Qunwei Tang
Triboelectric nanogenerators (TENGs) have attracted growing attention because they are advanced energy conversion devices to efficiently harvest low-frequency mechanical energy from nature. How to increase the permittivity of electrode materials as well as the surface charge density is technically important to improve the output performances of a robust TENG. In this study, an all-inorganic cesium lead bromide (CsPbBr3) perovskite film with semiconducting characteristics is combined with metallic nano-platinum to build bulk Pt/CsPbBr3 Schottky junctions, which are used as triboelectric electrode materials in vertical contact-separation perovskite TENGs. The systematic characterization demonstrates that the electron binding energy and dielectric properties of bulk Pt/CsPbBr3 Schottky junction tailored perovskite films are maximized by optimizing the Pt dosage. An open-circuit voltage of 273 V, a short-circuit current density of 30.3 μA cm−2 and an instantaneous maximum power density of 1295.5 mW m−2 are achieved by the champion Pt/CsPbBr3 TENG at a Pt dosage of 0.5%. A maximum energy storage of 3.96 mJ is stored in a 1 μF capacitor within a 300 s charging period. This work provides new insights into Schottky junction TENGs for enriching the fundamental principles of both halide perovskites and TENGs.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xueping Yu,Zhongzhe Liu,Xiya Yang,Yudi Wang,Jihua Zhang,Jialong Duan,Liming Liu,Qunwei Tang
Triboelectric generators (TENGs) have been extensively studied as a new energy for low cost and the universally applicable prospect. Meanwhile, perovskites have been applied in TENG and show a good performance in view of high carrier mobility, long life and dielectric properties. The asymmetry structure of the orthogonal phase CsPbBr3 perovskite endows it with ferroelectric property and induces the misalignment of the positive and negative charge centers. Herein, the surface energy of halogen doped inorganic CsPbX3 (X = Cl–, Br–) perovskites are theoretically investigated by density functional theory (DFT) calculation, the crystal polarizability of pristine CsPbBr3 is improved from 0.47 Ry a.u. to 0.52 Ry a.u. (CsPbCl3), indicating the polarizability of CsPbCl3 is higher than CsPbBr3. In addition, the build-in electric field (Ebuild-in) of perovskite materials can be enhanced by the spontaneous polarization and the aligned dipoles in the Ebuild-in could further improve the tribo-electrostatic electric field by retaining more triboelectric surface charges. In the end, CsPbCl3 achieved a power of 3.06 W m–2 compared to the power of 1.34 W m–2 of CsPbBr3. This work focuses on the regulation of crystal planes using spontaneous polarization of perovskite toward achieving a high built-in electric field for enhancing triboelectric surface charge density.
研究领域:
材料科学
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能源技术
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物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Tianrun Gu,Runnan Zhang,Shiyu Zhang,Benbing Shi,Junhui Zhao,Zhen Wang,Mengying Long,Guangzhe Wang,Ting Qiu,Zhongyi Jiang
The efficient separation of Li + /Mg 2+ is the key to lithium extraction from salt lake brine. Herein, a multi-amino quaternary ammonium salt (3,5-dimethylhydrazide-benzyl trimethyl ammonium bromide, DHTAB) was designed and synthesized to modify pristine polyamide (PA) nanofiltration membranes. DHTAB was grafted on the surface of the PA nanofiltration membrane to construct a positively selective layer for Li + /Mg 2+ separation. The introduction of DHTAB increased the membrane surface charge density to +5.16 mC m −2 , which was nearly three times that of the pristine PA membrane. The increased charge density of the modified membrane led to a stronger Donnan exclusion for Mg 2+ , and accordingly a high MgCl 2 rejection of 99.2%. The modified membranes exhibited a high Li + /Mg 2+ separation factor of up to 60.1, when applied for MgCl 2 and LiCl binary solution, which exceeded all known PA-based nanofiltration membranes.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2024
·Vol. 36
·期 25
·2400451
·
IF 27.4
Zhen Tang,Dan Yang,Hengyu Guo,Shiquan Lin,Zhong Lin Wang
Wettability significantly influences various surface interactions and applications at the liquid–solid interface. However, the understanding is complicated by the intricate charge exchange occurring through contact electrification (CE) during this process. The understanding of the influence of triboelectric charge on wettability remains challenging, especially due to the complexities involved in concurrently measuring contact angles and interfacial electrical signals. Here, the relationship is investigated between surface charge density and change of contact angle of dielectric films after contact with water droplets. It is observed that the charge exchange when water spared lead to a spontaneous wetting phenomenon, which is termed as the contact electrification induced wetting (CEW). Notably, these results demonstrate a linear dependence between the change of contact angle (CA) of the materials and the density of surface charge on the solid surface. Continuous CEW tests show that not only the static CA but also the dynamics of wetting are influenced by the accumulation charges at the interface. The mechanism behind CEW involves the redistribution of surface charges on a solid surface and polar water molecules within liquid. This interaction results in a decrease in interface energy, leading to a reduction in the CA. Ab initio calculations suggest that the reduction in interface energy may stem from the enhanced surface charge on the substrate, which strengthens the hydrogen bond interaction between water and the substrate. These findings have the potential to advance the understanding of CE and wetting phenomena, with applications in energy harvesting, catalysis, and droplet manipulation at liquid–solid interfaces.
研究领域:
材料科学
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物理化学
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表面科学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2017
·Vol. 5
·期 16
·3962-3972
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IF 5.256
Shunsheng Ye,Hongyu Wang,Hongyang Su,Lingxia Chang,Shuli Wang,Xuemin Zhang,Junhu Zhang,Bai Yang
A facile strategy is reported for the electrostatic self-assembly of homogeneous and gradient plasmonic nanoparticle arrays with tunable interparticle distances and optical properties. The interparticle distance is dominated by the surface charge density of the substrate, which is tuned via thermal annealing according to the temperature-dependent molecular mobility of the polymer. Oxygen plasma is employed to endow neutral polystyrene (PS) films with sufficient charges, enabling subsequent electrostatic adsorption. The density of surface charges can be readily tuned via a thermal annealing step after plasma treatment, which is confirmed by quantitative analyses of oxygen and nitrogen using X-ray photoelectron spectroscopy. Afterwards, PS films with regulated charge densities reshape the double layers around nanoparticles to various degrees during the assembly, leading to tunable interparticle separations. UV-Vis spectroscopy reveals tunable plasmonic properties owing to the critical role of interparticle separation in plasmon coupling. Here such structures are demonstrated to act as wavelength-selective substrates for multiplexed acquisition of surface enhanced Raman scattering. Alternatively, by applying a temperature gradient in the annealing step, we create a macroscopic surface with a continuous gradient in plasmonic properties. Such a “plasmonic library” can be a promising material for fast screening of interparticle distance or extinction spectrum in specific applications on one single substrate.
研究领域:
纳米材料
·
光学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
Carbon Energy
·
2024
·
IF 19.5
Zhengmao Ding,Tiancheng Gu,Rui Zhang,Shouyi Sun,Kaiqiang Wang,Hanli Zhang,Jinjin Li,Yunjun Luo
Nanofluidic channels inspired by electric eels open a new era of efficient harvesting of clean blue osmotic energy from salinity gradients. Limited by less charge and weak ion selectivity of the raw material itself, energy conversion through nanofluidic channels is still facing considerable challenges. Here, a facile and efficient strategy to enhance osmotic energy harvesting based on drastically increasing surface charge density of MXenes subnanochannels via oxygen plasma is proposed. This plasma could break Ti–C bonds in the MXenes subnanochannels and effectively facilitate the formation of more Ti–O, C═O, O–OH, and rutile with a stronger negative charge and work function, which leads the surface potential of MXenes membrane to increase from 205 to 430 mV. This significant rise of surface charge endows the MXenes membrane with high cation selectivity, which could make the output power density of the MXenes membrane increase by 248.2%, reaching a high value of 5.92 W m −2 in the artificial sea-river water system. Furthermore, with the assistance of low-quality heat at 50°C, the osmotic power is enhanced to an ultrahigh value of 9.68 W m −2 , which outperforms those of the state-of-the-art two-dimensional (2D) nanochannel membranes. This exciting breakthrough demonstrates the enormous potential of the facile plasma-treated 2D membranes for osmotic energy harvesting.
研究领域:
材料科学
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能源科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Junjie Lu,Zehua He,Zihao Lin,Xianwei Deng,Bai Huang,Baofeng Lin,Lihua Fu,Chuanhui Xu
Flexible wearable triboelectric nanogenerator (TENG) has attracted immense interest in various application scenarios due to its intrinsic self-powered characteristics. Recently, rubbers with high elasticity are frequently reported to be favored substrates for wearable smart devices to enhance body comfort and contact effects. However, most commercial rubbers are nonpolar and lack of enough polar functional groups even after physical and chemical modification to earn satisfactory surface charge density for high triboelectric performance. Moreover, the combination of high triboelectric and mechanical properties is still a significant challenge for flexible TENG material. In this work, a flexible triboelectric rubber with tunable surface charge density and excellent mechanical properties is demonstrated via a natural polymer assisted dispersion of perovskite nanofiller strategy. The designed rubber-based TENG shows an excellent 310 V triboelectric output, 106 nC transferred charge and 6.14 W·m −2 power density, as well as a favorable mechanical property of 10.69 MPa Young’s modulus and 211 % strain. The material can harvest mechanical energy and charge 1 μF commercial capacitors to 1.8 V in 60 s from nature. When serves as flexible device, it can also self-powered to real-time monition various human behavior and distinguish different speed of vehicle driving conditions. We expect our works will provide a feasible strategy to significantly improve the comprehensive performance of flexible wearable rubber-based TENG and advance the potential application of rubber.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
The Innovation
·
2025
·
IF 25.7
Jianwei Zong,Wenjie Ma,Yanan Jiang,Fei Wu,Xiulan He,Ping Yu,Lanqun Mao
Atomically thin two-dimensional membranes are promising for osmotic energy generation. However, the trade-off between permeability and selectivity remains a long-standing bottleneck. Herein, we demonstrate that a cationic AB-stacking covalent-organic framework (COF) bilayer achieves high ion conductivity and selectivity. Through precise molecular design and the Langmuir-Blodgett (LB) technique, we fabricate an anion-selective COF bilayer (EB-COF) using tetradentate 4,4′,4″,4′′′-(porphyrin-5,10,15,20-tetrayl)tetrabenzaldehyde (TFPP) and bidentate ethidium bromide (EB) with a covalently tethered pyridinium moiety. The EB-COF bilayer shows a record-high output power density of 7,174 W m −2 (0.5/0.01 M NaCl), significantly outperforming the AA-stacking PDA-COF bilayer constructed with TFPP and neutral p -phenylenediamine (PDA). This exceptional performance stems from highly ordered sub-2-nm nanopores, exceptional pore utilization efficiency, and a large surface charge density of 4.4 mC m −2 , which together synergistically enhance anion selectivity and ion permeability. This work not only provides fundamental insights into the structure-performance relationship of permselective membranes but also offers a promising strategy for high-efficiency osmotic energy harvesting.
研究领域:
材料科学
·
能源工程
·
分子设计
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 8
·5334-5345
·
IF 4.682
Hao Yi,Huang Jieyu,Liao Shiqin,Chen Dongsheng,Wei Qufu
The output performance of the triboelectric nanogenerator (TENG) greatly depends on the surface charge density. However, the surface charge dissipation and the electron transfer would result in a sharp decrease in the output performance. In this work, we proposed a functional multilayer negative structure of TENG, using polystyrene interface material to provide high electron trapping holes and conductive carbon black doped polystyrene to accelerate charge transfer rate to improve the charge density further. It was indicated that the open-circuit voltage generated by the TENG with the polystyrene layer was 460% of that of the PVDF single-layer structure and was 694% enhanced by introducing conductive carbon black in the multilayer performance-enhanced TENG (PE-TENG). The peak output power was up to 52.3 μW in a contact area of 3 × 3 cm 2 . In short, it proves an effective way to improve the output performance of flexible triboelectric nanogenerators with comprehensive applications in wearable energy sources and human health monitoring sensors.
研究领域:
材料科学
·
能源技术
·
传感器技术
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2024
·Vol. 14
·期 1
·1-12
·
IF 3.8
Niu Yanhui,Yu Wenbin,Yang Shuguang,Wan Quan
This research delved into the influence of mesoporous silica’s surface charge density on the adsorption of Cu 2+ . The synthesis of mesoporous silica employed the hydrothermal method, with pore size controlled by varying the length of trimethylammonium bromide (C n TAB, n = 12, 14, 16) chains. Gas adsorption techniques and transmission electron microscopy characterized the mesoporous silica structure. Surface charge densities of the mesoporous silica were determined through potentiometric titration, while surface hydroxyl densities were assessed using the thermogravimetric method. Subsequently, batch adsorption experiments were conducted to study the adsorption of Cu 2+ in mesoporous silica, and the process was comprehensively analyzed using Atomic absorption spectrometry (AAS), Fourier transform infrared (FTIR), and L3 edge X-ray absorption near edge structure (XANES). The research findings suggest a positive correlation between the pore size of mesoporous silica, its surface charge density, and the adsorption capacity for Cu 2+ . More specifically, as the pore size increases within the 3–4.1 nm range, the surface charge density and the adsorption capacity for Cu 2+ also increase. Our findings provide valuable insights into the relationship between the physicochemical properties of mesoporous silica and the adsorption behavior of Cu 2+ , offering potential applications in areas such as environmental remediation and catalysis.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
DOI
PubMed
高影响因子
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