ACS Sustainable Chemistry & Engineering
·
2016
·
IF 5.267
Yuan-Ying Wang,Xiang-Rong Jing,Ling-Li Li,Wu-Jun Liu,Zhong-Hua Tong,Hong Jiang
Biochar is a solid material obtained from thermochemical conversion of biomass in an oxygen-limited environment. It is widely used as a soil remediator and carbon sequestrator. However, its biotoxicity to the ecosystem remains unclear. In this study, we assess the toxic effects of three fast pyrolytic biochar extract solutions (rice husk, saw dust, Acorus calamus) on a miocroorganism (Pseudomonas aeruginosa), a plant (Triticum spp.), and an animal (Caenorhabditis elegans). Systematic toxicity tests indicate that the biotoxicity of biochars varies with their biomass sources. Biochars derived from rice husk and sawdust have negligible toxic effects on all the tested organisms, suggesting that biochars obtained from agricultural waste are safe for soil application. By contrast, biochar derived from Acorus calamus shows significant toxicity on all tested organisms at relative high dosage, indicating that risk assessment is necessary before its environmental use. Furthermore, this study found that use of the UV254 value is more practical than the SUV254 value for evaluation of biochar biotoxicity. Finally, gel permeation chromatography (GPC) suggests that certain small aromatic molecules may be responsible for the toxicity of biochar derived from Acorus calamus.
研究领域:
环境科学
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 137
·期 39
·49185
·
IF 2.52
Zuojun Wei,Haiyan Liu,Linwei Yu,Shuwen Xiao,Yaxin Hou,Xiangrong Chen
Seven delocalized aromatic molecules with electron-donating and electron-withdrawing groups are applied as voltage stabilizers to improve the insulation properties of polyethylene blends. Voltage stabilizers 1 wt% are added into the blends (90 wt% low-density polyethylene and 10 wt% high density polyethylene) by diffusion loading method. Electrical measurements including electrical treeing, space charge distribution, and direct current conductivity are conducted to disclose their effects. The results show that the co-existence of matched electron-donating and electron-withdrawing groups in the molecules is favorable for the insulation properties. A 50% increase of tree initiation voltage is achieved with the addition of 3-aminobenzoic acid, which is also able to inhibit the space charge and decrease the conductivity at lower temperature. Besides, the grafting sample of the optimal molecule is successfully prepared and displayed enhanced electrical properties. Finally, the common internal mechanism of the delocalized molecules on different electrical properties is revealed.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Qi Yu,Jingyi Feng,Jie Li,Anfei He,G. Daniel Sheng
Surface oxygen-containing functional groups (OFGs) at different sites of carbonaceous materials showed different effects on the normalized monolayer adsorption capacity ( Q BET/A ) obtained from the modified BET model. The OFGs on mesoporous surfaces inhibited the adsorption via the water competition, whereas those on the external surface promoted the adsorption due to the enhanced hydrophobic driving force and electrostatic forces, as analyzed from the adsorption molar free energy. Multiple linear relationships were established between the monolayer adsorption capacity Q BET/A and the amounts of OFGs on mesoporous and the external surfaces ( [O] meso and [O] external , respectively). The properties of aromatic adsorbate compounds, the polar area radio of aromatic molecule to water ( PA ad/w ), and the log K ow together influenced the inhibition or promotion effects of OFGs. These results would allow predictions of adsorption behavior of aromatic compounds on carbonaceous materials on the basis of OFGs parameters. Theoretical calculations and simulations projected the configuration of aromatic molecules being parallel to the graphene sheets of carbonaceous materials. The symmetry-adapted perturbation theory (SAPT) energy decomposition showed that the electrostatic forces intensified with the increase of adsorbate polarity. These analyses revealed that the electrostatic forces were enhanced in the presence of OFGs and that the π-π EDA (electron donor-acceptor) was the main force.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Soft Matter
·
2014
·Vol. 11
·期 9
·1767-1777
·
IF 4.151
Shangyang Li,Lin Zhang,Bo Wang,Mingfang Ma,Pengyao Xing,Xiaoxiao Chu,Yimeng Zhang,Aiyou Hao
Vesicles were formed in aqueous solution using β-cyclodextrin (β-CD) complexes with a series of ultra-small aromatic molecules. The vesicles are easy to prepare without a complicated synthesis procedure and their structure was identified and characterized using various techniques, including transmission electron microscopy, atomic force microscopy and dynamic laser light scattering. Using the β-CD/L-phenylalanine system as a representative example, the structural factors that caused the self-assembly were revealed using proton nuclear magnetic resonance, Fourier transform infrared spectroscopy and X-ray diffraction. In addition, the vesicular architecture could be endowed with a diverse range of stimuli-responses, as a consequence of the selective addition of various guest molecules. It is anticipated that this novel assembly strategy could be further extended, and that it presents new opportunities for the development of nanocarriers and soft materials.
研究领域:
纳米医学
·
药剂学
·
软物质材料
·
分子自组装
·
药物递送系统
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Pengqi Lu,Jiawei Lang,Zeping Weng,Arash Rahimi-Iman,Huizhen Wu
Owing to a complex monocline structure and high-density of defects in monocrystalline GaTe, the performance of GaTe-based electronic devices is considerably compromised. Yet, the defects’ nature in GaTe could be a merit rather than a shortcoming in other realms. In our work, the density of defects in GaTe films is utilized for a facile decoration of Au nanoparticles (NPs), which allowed us to extend its application potential to the domain of surface enhanced Raman scattering (SERS) for the first time. Two-dimensional (2D) GaTe layered structures are prepared by mechanical exfoliation, and high-density Au NPs are synthesized by immersion of 2D GaTe in HAuCl4 aqueous solution. By varying the immersion time, the sizes and coverage rate of Au NPs on GaTe can be elaborately tuned. Thanks to the defect nature of GaTe, the maximum coverage amounts to 98%. The hereby achieved Au-NPs–2D-GaTe hybrid structure demonstrates outstanding properties as a superior SERS substrate for ultrasensitive detection of R6G aromatic molecules. Remarkably, the enhancement factor reaches up to 1.6 × 104, and the minimum detectable concentration is 10–11 M, undercutting that of recently reported Au-NPs–MoS2 SERS and Au-NPs–graphene SERS substrates which have a similar structure. With superior detection capability and facile preparation, Au-NPs–GaTe SERS substrates can become a perfect choice for the detection of aromatic molecules.
研究领域:
材料科学
·
纳米技术
·
分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Weili Ma,Guangyong Liu,Qian Wang,Ju Liu,Xiaoqing Yuan,Jiayu Xin,Sufan Wang,Hongyan He
The valuable exploitation of lignin depends mainly on the conversion strategy of lignin, of which the conversion of lignin into valuable aromatic molecules is a critical approach. In this study, three lignin model compounds, veratrylglycerol-β-guaiacyl ether (VG), 4-phenoxyphenol (PP), 4-ethoxyphenol (EP), are comparatively degraded by electrochemical oxidation in an aprotic ionic liquid (IL), [Bmim][OTf], and two protic ILs, [PrSO 3 Hmim][OTf] and [BSO 3 Hmim][HSO 4 ]. The protic ILs are more favorable for the degradation of lignin-derived substrates compared to aprotic ILs. Oxygen reduction reaction (ORR) in the O 2 atmosphere generates reactive oxygen species (ROSs) that play an indirect oxidation effect on substrates, which is stronger for the protic ILs. In addition, the different types of ILs allow modulating the distribution of degradation products. Combined with the identification of products and CV curves, the microscopic mechanisms of the degradation process for lignin model compounds are further elucidated.
研究领域:
化学
·
环境科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Zhi Li,Tao Guo,Yuehua Hu,Yuan Qiu,Yang Liu,Huimeng Wang,Yi Li,Xian Chen,Jibin Song,Huanghao Yang
Even though black phosphorus (BP) has exhibited outstanding capabilities in biomedical, physical, and energy fields, the issues of degradation under ambient conditions and unreactive functional interface limit its further application. There are numerous methodologies utilized to prevent BP degradation; however, these methods usually generate further problems and normally do not involve alterations to the chemically inert BP. Herein, for the first time, we propose a simple and efficient strategy to prepare and modify BP nanosheets (p-BPNSs) by employing aromatic 1-pyrenylbutyric acid through a noncovalent π–π stacking interaction. This strategy not only adopts a novel strategy for enhancing the stability of BPNSs but also paves a convenient way to anchor other active biomolecules such as a targeting effect to extend the biomedical applications of BPNSs. The modified p-BPNSs exhibit enhanced physical and chemical stabilities as well as rich carboxyl groups for further modification. In this work, RGD-modified p-BPNSs exhibit targeted photothermal therapy ability against cancer in both in vitro and in vivo studies, owing to anchoring of arginine-glycine-aspartic acid (RGD) tripeptides, which could target nanosheets into the tumor site through systematic circulation. Consequently, this work not only provides a new concept for modifying and protecting the BP but also opens a novel window for extending the biomedical application of BP by surface engineering.
研究领域:
材料科学
·
纳米技术
·
生物医学工程
·
癌症研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shuoning Zhang,Zichen Wang,Jianying Zhang,Jiale Liu,Chang Sun,Shengyu Qin,Yunxiao Ren,Lanying Zhang,Wei Hu,Huai Yang
Due to the great potential in many applications, multi-responsive soft actuators as a kind of smart materials have attracted great interest from the scientific community. Liquid crystal elastomers (LCEs) are gradually becoming their preferred candidate matrix because of their unique mesogenic anisotropy and polymer elasticity. Here, we designed and synthesized a new disulfide-bonded aromatic molecule (named DSAC), which was used to endow the LCE matrix with a self-healing effect to extend the service life. The large conjugate structure greatly reduces the bond energy of the disulfide bond, thus allowing self-healing to occur at a lower temperature. Furthermore, the LCE matrix was coated with a novel type of functional layer with photothermal and conductive properties to make it be driven by multi-modes. Based on the above, we have prepared a healable and dual-driving mode soft actuator enabled by disulfide-bonded liquid crystal elastomers with multiple stimulus–response properties, which shows great potential in flexible electronics, artificial muscles and soft robots.
研究领域:
材料科学
·
机器人技术
·
纳米技术
·
智能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROSTATICS
·
2025
·
IF 2.1
Wenbo Zhu,Kaulya Pathiraja,Baojun Hui,Xu Guo,Mingli Fu,Shijie Du,Linjie Zhao,Yuhuai Wang,Jin Li
HVDC GIS cable terminals, where the cable connects to gas insulated switchgears, are particularly vulnerable to breakdown caused by factors such as high temperature, lack of pressure, space charge accumulation, and material degradation. This study explores stabilizing silicone oil coating, by incorporating benzene derivatives. The paper proposes the use of quantum chemical calculations (QCC) to identify suitable additives that can optimize the performance of silicone oil. By enhancing the dielectric properties and thermal stability of silicone oil, this research seeks to reduce interface discharge and increase the longevity and reliability of high-voltage cable terminals.
研究领域:
高电压工程
·
介电材料
·
电气绝缘
·
量子化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2020
·Vol. 8
·期 5
·1040-1048
·
IF 5.344
Haihong Yu,Zhengfei Zhuang,Dongling Li,Yanxian Guo,Yang Li,Huiqing Zhong,Honglian Xiong,Zhiming Liu,Zhouyi Guo
By means of a simple and photo-induced method, four colors of molybdenum oxide quantum dots (MoOx QDs) have been synthesized, using Mo(CO)6 as the structural guiding agent and molybdenum source. The as-prepared MoOx QDs display diverse optical properties due to the different configurations of oxygen vacancies in various nanostructures. Among them, crystalline molybdenum dioxide (MoO2) with a deep blue color shows the most intense localized surface plasmon resonance effect in the near-infrared (NIR) region. The strong NIR absorption endows MoO2 QDs with a high photothermal conversion efficiency of 66.3%, enabling broad prospects as a photo-responsive nanoagent for photothermal therapy of cancer. Moreover, MoO2 QDs can also serve as a novel semiconductor substrate for ultrasensitive surface-enhanced Raman scattering (SERS) analysis of aromatic molecules, amino acids and antibiotics, with SERS performance comparable to that of noble metal-based substrates. The therapeutic applications of MoO2 QDs open up a new avenue for tumor nanomedicine.
研究领域:
材料科学
·
纳米技术
·
癌症治疗
·
光学
·
分析化学
✓ 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）