Environmental Science-Nano
·
2018
·Vol. 5
·期 10
·2452-2460
·
IF 6.087
Yinqing Zhang,Junchao Xia,Jinliang Xu,Binbin Sun,Wei Wu,Lingyan Zhu
Due to their excellent properties, silver nanowires (AgNWs) have been applied increasingly in many optical and electronic products, and may be inevitably discharged in aquatic environments. Dissolution and sulfidation are two of the most important processes of AgNWs occurring in aquatic environments and may significantly affect their fate and toxicities. This study aimed to investigate the impacts of four types of surfactants on the dissolution and sulfidation of AgNWs. Anionic, zwitterionic, and nonionic surfactants, including sodium dodecylbenzenesulfonate, cetyl betaine, and glycerol monostearate, did not affect the dissolution and sulfidation of AgNWs. However, cationic surfactants (cetyltrimethylammonium bromide, cetyltrimethylammonium nitrate and benzyldimethyldodecylammonium nitrate) promoted the dissolution and sulfidation of AgNWs significantly. The cationic surfactants, especially cetyltrimethylammonium bromide, preferred to bind with the (111) planes of AgNWs, leading to the corrosion of the initial wire structure of AgNWs to shorter nanorods. The increased surface area of AgNWs resulted in faster dissolution. The dissolved Ag+ ions reacted with sulfide quickly, leading to faster sulfidation of AgNWs. In addition, the cationic surfactants interacted with AgNWs and decreased the electrostatic repulsion between the sulfide ions and the surface of AgNWs, thus promoting the direct oxysulfidation. As a consequence, the cationic surfactants facilitated the sulfidation of AgNWs to a greater extent than dissolution. The interaction of AgNWs and surfactants could significantly affect their bioavailability and ecotoxicities in aquatic environments.
研究领域:
环境科学
·
纳米材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Shasha Zhu,Jinglei Lei,Lina Zhang,Jianxin He
The exploration of catalysts with high activity and low cost for water splitting is still necessary. Herein, a nanowire-like morphology CoO/NF electrode is synthesized using facile hydrothermal reaction and calcination treatment. The urea can regulate its morphology during the synthetic process of CoO/NF. Electrochemical studies reveal that the as-obtained CoO/NF exhibits excellent electrocatalytic performance with overpotential of 307 mV at current density of 10 mA cm −2 and Tafel slope of 72 mV dec −1 for oxygen evolution reaction , and CoO/NF delivers current density of 10 mA cm −2 at overpotential of 224 mV for hydrogen evolution reaction . The results of the oxygen evolution reaction stability show that the overpotential of CoO/NF electrode is only increased by 4 mV at current density of 10 mA cm −2 . The two-electrode water splitting with CoO/NF electrodes as both anode and cathode needs a cell potential of 1.76 V to reach 10 mA cm −2 . Therefore, this simple method to prepare CoO/NF electrode can enhance the properties of electrocatalysts , which makes CoO/NF a promising material to replace noble metal-based catalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Xiuxiu Zou,Chen Huang,Ting Wu,Kuizhong Shen,Yan Lin,Yiqiang Wu,Yonghao Ni,Guigan Fang
Cellulosic fiber (CF) has gained extensive attention as the flexible and supporting substrate of silver nanowires (AgNWs) due to its excellent mechanical properties and high specific surface area. However, its susceptibility to corrosion and abrasion still remains a limiting factor for widespread adoption in flexible electronic devices. Herein, we report a lignin-abundant cellulosic fiber (LCF)/AgNW conductive paper synthesized through a sample self-assembly method. Benefiting from the strong chemical/physical properties of the presence of lignin in the LCF, the LCF/AgNW paper was proved to possess enhanced stability to various chemical corrosions and excellent conductive reliability and reusability during mechanical abrasions (i.e., bending and friction). Importantly, the LCF/AgNW paper exhibited a high conductivity of 4561.88 S/cm at the laden AgNWs of 18.57 wt %, much higher than that of the CF/AgNW paper and other reported biomass-based conductive papers. Moreover, the LCF/AgNW paper also showed superior thermal management performances, possessing sensitive temperature driving capacity and rapid heat dispersive capacity. These efforts could provide a facile and feasible route for the design of next-generation heat dissipation components for flexible smart devices.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Jian Wei,Li Yuan,Guozheng Liang,Aijuan Gu
Endowing near-infrared light (NIR) induced self-healing coatings with high transparency is an interesting issue with big challenge. Herein, starting from designing an acrylate resin system and surface activated W 18 O 49 nanowires (mW 18 O 49 ), a new kind of NIR induced self-healing composite coating was developed, which is coded as ACWx (x is the loading of mW 18 O 49 in each coating). The effect of mW 18 O 49 loading on the integrated performance of ACWx coatings was studied. As the content of mW 18 O 49 increases, the transparency of ACWx coatings decreases, but the transmittance at 550 nm of all coatings is still >83.9 %. In addition, ACW0.5 and ACW0.65 composite coatings exhibit outstanding NIR induced self-healing ability after irradiation under NIR (power density of 2.5 W/cm 2 ) for 3 min. Meanwhile, the integrated properties including adhesion, flexibility, hardness, gloss, acid and alkali resistance of ACWx composite coatings meet the application requirements of automotive varnishes.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 28
·9714-9720
·
IF 4
Sirui Liu,Yuxin Shi,Lingling Xu,Weican Zhan,Meixi Chen,Xiaoyue Pan,Yuqing Yao,Jiajie Cai,Mingyi Zhang,Xinzhi Ma
Designing an excellent OER catalyst in an alkaline environment is severe yet essential for industrial H2 application under the electrochemical technique. This study has achieved multiple modifications on CoN nanowires, the classic OER catalyst, via a facile room-temperature NaBH4 spontaneous hydrolysis. This facile process simultaneously generates oxygen vacancies and robust BN species. It wraps hydrophilic BOx motifs on the OER response CoN nanowires, producing OER active Co–N–B species, increasing active numbers and guaranteeing structural stability. It suggests that a low NaBH4 concentration (0.1 mol L−1) treatment endows CoNNWAs/CC with excellent OER performance and robust structure, which can drive a current density of 50 mA cm−2 with only 325 mV overpotentials with more than 24 hours’ durability. Even, the catalyst can drive 1000 mA cm−2 around 480 mV overpotential. This study allows a novel strategy for designing high-performance OER catalysts.
研究领域:
材料科学
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电化学
·
催化反应
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2023
·Vol. 25
·期 11
·2201710
·
IF 3.6
Zihan Tian,Zhaoping Hou,Xinhe Yang,Liangliang Liu,Wanggang Zhang
Due to the wider bandgap and low electron discharge capacity, the zeolitic imidazolate framework (ZIF-8) shows low photocatalytic performance compared with conventional semiconductor materials. To enhance the photocatalytic activity of ZIF-8, the ZIF-8@AgNWs composite is synthesized via the in situ growth method using silver nanowires (AgNWs) as the photo-enhanced material. The obtained ZIF-8@AgNWs exhibit the fully encapsulated shell-core structure of ZIF-8-AgNWs. The UV−vis diffuse reflectance spectroscopy (DRS) analysis shows that the addition of AgNWs leads to a significant increase in light absorption of the ZIF-8@AgNWs composite, and the bandgap of the ZIF-8@AgNWs is 2.9 eV, with a significant decrease compared to pure ZIF-8 (4.96 eV). The ZIF-8@AgNWs-2 achieves the best photocatalytic activity for methylene blue (MB) degradation. Its degradation efficiency reaches 94%, and its apparent rate constant is 0.04371 min −1 . Herein, a novel strategy for the MOF-based photocatalytic materials with higher photocatalytic activity is provided.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
·
2021
·
IF 13.084
Yuanyuan Qian,Furui Tan,Jun Liu,Qicong Li,Kuankuan Ren,Yanbin Huang,Xiaobao Li,Dawei Cao,Kong Liu,Chao Zhao,Yongxin Li,Zhijie Wang,Shengchun Qu
Plasmon-induced photocatalytic reactions are important in the process of conversion of solar energy into fuels. To efficiently harvest energetic charge carriers from light-excited plasmonic materials, contact of the metallic nanostructures with semiconductors is necessary. Herein, we report that, even on single Au nanowires that are not in contact with any semiconductors, prominent photocatalytic water oxidation reactions could be still observed. The involved Au nanowires have dimensions of 300 nm in diameter, and the fabricated nanoelectrode presents an obvious photocurrent of 0.4 mA/cm2 at the potential of 1.2 V vs Ag/AgCl. The corresponding incident photon-to-electron conversion efficiency is realized as 0.24% at the wavelength of 520 nm. Detailed investigations reveal that the hot holes around the d-band of the plasmonic nanomaterials are responsible for such photocatalytic behaviors. Our results provide a special perspective to the plasmon-related reactions.
研究领域:
材料科学
·
能源转换
·
纳米技术
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Yunliang Jiang,Yumin Dong,Yong Xiong,Jun Li,Jianping Zhou,Hongbo Liang,Binghua Zhou,Bing Xie
To meet the non-removable application scenarios of most integrated electronics, the development of polymer-based packaging materials possessing superior thermal conductivity and self-healing characteristics simultaneously is necessary. However, on account of the complexity of composite structure and composition , its self-heal remains a formidable challenge. Herein, we have designed a self-healing and thermally conductive bi-functional polyurethane composites with Diels-Alder structure (PUDA) and silver nanowires (AgNWs). The hydrogen-bonding network at the interface of AgNWs and PUDA facilitated the dispersion of AgNWs in the matrix, which endows the composites with desirable thermal conductivity . Incorporating 3, 6, 9, 12, and 15 wt% of AgNWs into PUDA leads to increases in thermal conductivity of 33%, 104%, 154%, 321%, and 371%, respectively. In particular, the novel composites incorporated 12 wt% AgNWs exhibited the most efficient balance between self-healing efficiency and thermal conductivity performance. The thermal conductivity of PUDA/AgNWs with 12% of AgNWs content is 1.01 W/mK, which is 4.8 times that of PUDA (0.21 W/mK). After two reconstitution cycles, the thermal conductivity of PUDA/AgNWs-12 was restored to 85%. This study demonstrates the successful preparation of composites possessing both desirable thermal conductivity and self-healing capabilities, rendering them suitable for use as thermal interface materials in thermal management systems and flexible electronics applications.
研究领域:
材料科学
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纳米技术
·
热管理
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 24
·12845-12851
·
IF 7.443
Ling Lin,Gui-Qi Gao,Qing Zhu,An-Wu Xu
Plasmon hot electron injection enhanced photocurrent has potential applications in light harvesting in photovoltaic devices. We demonstrate a cathodic photocurrent enhancement system utilizing strongly coupled Ag@perylene (Ag@Pe) core–shell nanowires, and the perylene shell thickness can be readily controlled. The strong coupling between the plasmonic resonance and molecular exciton resonance is evidenced by the substantial plasmon damping of Ag NWs and the enhancement of fluorescence of perylene with a red shift in Ag@Pe samples. The photocurrent of the Ag@Pe sample with a shell thickness of 5.8 nm (Ag@Pe-5.8 nm) shows a 16-fold enhancement compared to that of perylene. While, a simply mixed Ag–perylene sample displays only a 6-fold enhancement in photocurrent, indicating that the strong coupling in the Ag@Pe system plays a major role in the enhancement of photocurrent through hot electron transfer from the silver nanowires to perylene molecules. This strongly coupled Ag@Pe hetero-nanostructure could find potential applications in surface plasmon-driven, hot-electron solar cells and surface catalytic reactions.
研究领域:
材料科学
·
光电子学
✓ 已验证
DOI
高影响因子
npj Flexible Electronics
·
2024
·Vol. 8
·期 1
·1-10
·
IF 12.3
Wang Zijian,Yu Wen,Gao Chaochao,Zhu Zhenye,Zhang Jiaheng
Fabricating high-conductive composites and constructing highly conductive networks are crucial for high-performance electrothermal film. In this study, an Ag nanowires/graphene (Ag/G) composite synthesized by liquid-phase exfoliation and in-situ photoreduction is mixed with carbon black (CB) to form a composite conductive ink, and a CB/Ag/G composite electrothermal film with a point-line-plane three-dimensional microstructure is obtained via blade coating process. Both the addition of Ag nanowires and a subsequent compression rolling treatment induce the establishment of the effective conductive network in the film, endowing it with an outstanding conductivity of 399.4 S cm −1 . The film reaches a T s of 204 °C with an input voltage of 3.0 V, and is successfully applied in water heating and de-icing, demonstrating its extraordinary electrothermal performance and vast potential for practical applications. The film is also used as an electromagnetic shielding film and heat dissipation substrate, showing exceptional electromagnetic shielding (42.5 dB) and heat dissipation properties.
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
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yuanting Wu,Jingyue Hu,Qiujun Liu,Xinmeng Zhang,Yunlong Xue,Bocheng Zhang,Xuhua Liu
Power density is one of the important factors affecting the performance of electrode materials, which is hampered by ion/electron transport and agglomeration build-up problems. In this study, a novel 3D NiMnO 3 /Ni(OH) 2 /Ag NWs composite is synthesized via the introduction of Ag NWs. The introduction of Ag NWs synergistically influences the crystal structure and micro-morphology of the NiMnO 3 /Ni(OH) 2 /Ag NWs composite. The unique pentatwinned structure of Ag NWs facilitates the enhancement of the (110) and (101) crystal planes, which induces the movement of Ni 2p 3/2 , leading to a significant increase of Ni 2+ concentration in the composites. This ensures an abundance of ion adsorption sites, generating materials conducive to reactive activity. This new structure increases the density of active sites and establishes a conductive network, which optimizes the electron and ion transport paths, greatly reduces the diffusion resistance at the electrode-electrolyte interface, and improves the charge transfer efficiency, thus effectively increasing the specific capacity and energy density of the material. The NiMnO 3 /Ni(OH) 2 /Ag NWs//AC device exhibits a remarkable specific capacity of 350.478 mAh·g −1 at a current density of 0.01 A cm −2 , and its Ragone plot reveals a peak energy density of 81.107 Wh kg −1 at a power density of 1699.871 W kg −1 . Additionally, it achieves an energy density of 60.532 Wh kg −1 at a power density of 8490.072 W kg −1 . This study explores the design and application of 3D structured electrode materials, which effectively improves the specific capacity of the materials and provides a new idea to further improve the energy density of supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Ziwei Sun,Yong Wang,Ye Liu,Ruliang Liu,Tao Chen,Shuming Ye,Niu Lai,Haoyang Cui,Feng Lin,Rongfei Wang,Jie Yang,Shaoying Ke,Chong Wang
All-inorganic perovskite materials have gained enormous attention in photodetectors (PDs) due to their high charge carrier mobility, cost-effectiveness, and tunable bandgap. However, instability and corresponding performance degradation of perovskite PDs when exposed to surrounding humidity persist as challenges. In this work, a composite PD was fabricated by combining CsPb2Br5 nanowires and CsPbBr3 thin-film perovskites as an example to address these problems. The CsPb2Br5 nanowires were prepared by a facile water-bath method to improve the water resistance, and the subsequent evaporation of the CsPbBr3 film formed a type-I heterostructure to enhance its photosensitivity of PDs. As a result, the device exhibits a 10 times higher responsivity of 206 mA/W than that of the bare CsPbBr3 thin film device and maintains 92.85% of its original detectivity after being exposed to a humid environment (RH = 75%) for 144 h. Furthermore, the corresponding fundamental characterization was also performed to reveal the role of CsPb2Br5 nanowires in enhancing the overall performance of the PD. This work provides a simple and efficient approach to enhancing the durability and performance of all-inorganic halide perovskite devices through the embedding of CsPb2Br5 perovskite nanowires.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）