ENERGY
·
2017
·
IF 4.52
Ang Li,Lei Zhu,Zhiwei Deng,Zhan Gao,Zhen Huang
The chemical effects of carbon dioxide on the oxidation of biodiesel surrogate, methyl butanoate (MB) were investigated experimentally in the SJTU laminar flow reactor at equivalence ratios of 1.5, 1 and 0.5, at atmospheric pressure. Generally, there are three kinds of effects from carbon dioxide (CO 2 ): thermal, dilution and chemical effects. In this study, argon was replaced by CO 2 as the dilute gas as a way to isolate the chemical effects by keeping the factors of temperature profile and dilution ratio constant. Therefore, the differences in concentrations of species at the exit from the flow reactor could be attributed to the chemical effects of CO 2 . Good agreement was found between the experimental and the computational results. The chemical effects were classified into two types. First, there was the radical factor, by which the reaction CO 2 + H = OH + CO played a significant role in the oxidation of MB. In CO 2 atmosphere, radical factors led to the reduction in reactivity and suppressed the decomposition of MB. The second effect was the collision factor, which derived from the high frequency of third-body collisions of CO 2 . This collision factor contributed to the formation of carbon monoxide and ethane. Moreover, in the combustion of biodiesel engine with EGR , pure chemical effects of CO 2 addition decreased the concentration of acetylene as well as suppressed formation of larger PAHs.
研究领域:
能源科学
·
化学工程
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Xin Jiang,Rui Wang,Yimin Tang,Weijie Di,Wenxue Wang,Bing Zhao,Libin Yang
Combined contribution of electromagnetic and chemical effects and their synchronous tuning are an effective strategy for constructing semiconductor surface-enhanced Raman scattering (SERS) substrates with ultra-high sensitivity. In this work, a sulfur vacancy-rich MoS 2 flower-like microsphere is successfully prepared for the first time through the combination of morphology regulation and defect engineering strategies, achieving a synchronous contribution of electromagnetic and chemical effects to SERS enhancement. SERS enhancement factor is as high as 2.54 × 10 8 , which represents the highest sensitivity among the currently reported semiconductor SERS-active substrates. The theoretical calculations and experiments elucidate the observed enhancement activity and the synchronous enhancement mechanism of electromagnetic and chemical effects. The unique flower-like structures of MoS 2 can induce Mie resonance by multiple reflection and scattering of incident light in the cavity structure, which realizes a strong electromagnetic enhancement effect. Meanwhile, a high-efficient carrier separation in substrate and a multiple-channel charge transfer mode between substrate and analyte can be achieved by means of abundant surface sulfur-vacancy defects, which provide a strong chemical enhancement effect for target analyte. This work opens up a new idea and perspective for constructing supersensitive semiconductor SERS sensors, ultimately advancing practical application of semiconductor SERS technology.
研究领域:
材料科学
·
纳米技术
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 4
·646
·
IF 5.719
Jing Xin,Lei Fu,Jing Wang,Sijia Wang,Luwei Zhang,Zhenxi Zhang,Cuiping Yao
Gold nanosphere (AuS) is a nanosized particle with inert, biocompatible, easily modified surface functionalization and adequate cell penetration ability. Photothermal, photochemical, and vapor effects of AuS could be activated by irradiating with nanosecond laser to cause cell death. Hence, AuS-mediated phototherapy irradiated with nanosecond laser is a promising and minimally-invasive treatment method for cancer therapy. However, various effects require different parameters to be activated. At present, few studies have reported on the influence of parameters of AuS inducing cell death under nanosecond laser irradiation. This makes it very challenging to optimize gold-nanoparticle-mediated specific or synergistic anti-cancer therapy. In this study, we revealed the main parameters and threshold values for AuS-mediated gastric cancer phototherapy with nanosecond pulsed laser irradiation, evaluated the pathway of induced cell death, and discussed the roles of photothermal, photochemical and vapor effects which can induce the cell death. The results showed that AuS-mediated phototherapy activated with nanosecond pulsed laser is an effective method for gastric therapy, mainly based on the photochemical effect. Prolonging the incubation time could decrease the irradiation dose, increase ROS-mediated photothermal effect and vapor effect, and then quickly induce cell death to improve security.Keywords:gold nanosphere-mediated phototherapy;nanosecond laser;photothermal effect;photochemical effect;vapor effect
研究领域:
纳米医学
·
肿瘤学
·
光动力治疗
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Lingqiao Kong,Jingyuan Qiao,Qiushi Ruan,Hui Wang,Xufeng Xi,Wenwen Zha,Zhenghua Zhou,Wei He,Wei Zhang,ZhengMing Sun
Photochemical-assisted rechargeable batteries are suffering from a high charge potential due to unfavorable surface charge kinetics of photochemical electrodes, that is surface defects induced energy loss . In this work, in-situ growing thickness-controlled polymer nanolayer on TiO 2 nanorods electrode by a facile solvothermal reaction optimizes surface states conditions via mitigating oxygen vacancy induced hole trapping agents, while polymer nanolayer creates abundant active surface states that efficiently extract holes for photooxidation reaction. For modified photoelectrodes , 8 times improvement in interfacial charge transfer/recombination ratio (K t /K r ) at a low applied bias contributes to a low onset potential (0.2 V vs. RHE) for photooxidation and shows 12 times improvement in photocurrent density at 0.4 V vs. RHE under simulated sunlight irradiation (AM 1.5 G, 100 mW cm −2 ) than that of r-TiO 2, which contributes to the superior performance of a photochemical-assisted rechargeable Zn-air battery (PZAB). Equipping such a photoelectrode can photo-charge the battery at 10 mA cm −2 with a record-low potential of 0.8 V, saving 76.5% electrical energy. The electrode shows excellent stability for a 10-h cycling test. This work provides scientific thoughts and synthetic strategies for a highly efficient solar-rechargeable electric energy storage system and expands the scope of application for conjugated polymers .
研究领域:
材料科学
·
能源存储
·
光电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Jiangping Jing,Zhuoyuan Chen,Chang Feng
This article specifically addresses the issue that there is no suitable method to determine the semiconductor types of non-uniformly distributed corrosion products. The photoinduced volt-ampere (i-V) curve is proved to be able to accurately measure the p/n type of corrosion products, in addition, it can also be used to study the transfer direction of the photogenerated electrons and quantitatively measure the photoelectrochemical effects of the corrosion products with semiconducting properties. This work will help to promote the study of the influencing mechanism of light illumination on corrosion process of metals and the photoelectrochemical cathodic protection mechanism.
研究领域:
材料科学
·
电化学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2021
·
IF 8.528
Shulong Zeng,Yao Ren,Pengju Liu,Qiang Wang,Lirong He,Qi Wang
With the growth of leather industry, plenty of leather solid wastes (LSW) have been generated annually but economic and ecological solution to utilize LSW is lacking because the crosslinked structure inhibits the reprocessing at macromolecular level to attain high performance materials. Herein, we present a facile route to realize physically de-bundling and de-crosslinking of chrome tanned collagen fibers as well as the preparation of LSW/natural rubber (NR) composite featuring remarkable tensile properties via mechanochemistry effect exerted by solid-state shear milling (S 3 M) equipment. It is found that original coordination between chrome and carboxylic group can be cleaved and the released chrome enables the in-situ compatibilization between LSW and natural rubber via the complexation between chrome and sulfur, which enables dual excellence in toughness and tensile strength compared with non-chromium containing composite. The improved dispersion and interfacial interaction enable the incorporation of 40 wt% LSW to afford respective NR composites with exceptional stress at 100 % strain (S100) and modulus, which are 5.07 MPa and 27.33 MPa, respectively, as well as superior tear strength and thermal stability. The S 3 M technology not only highlights a facile and green route to turn chrome containing LSW into high performance bio-based NR material, but also spurs the devising of innovative materials comprising leather collagen fibers.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Advanced Energy Materials
·
2025
·
IF 26
Xinrui He,Hailong Sun,Peifeng Yu,Hezhang Li,Zezhan Zhang,Yi Niu,Jing Jiang,Chao Wang
Thermoelectric devices have garnered significant interest but face limitations due to their reliance on external equipment and relatively low energy density for energy storage. This study introduces an innovative integrated device that achieves both the function of thermoelectric conversion and energy storage within a single unit through a precipitation-driven Thermogalvanic effect. Strikingly, both the thermoelectric (P max = 3.51 W m −2 ) and electrochemical (E = 459 J m −2 , surpasses the reported highest value by 132%) performances are excellent. Furthermore, a large-area prototype module comprising 32 units manifests an open circuit voltage of 1.7 V and exhibits an energy density of 463.9 J m −2 . This work provides an innovative and effective approach to the high-performance recycling system of thermoelectric conversion and energy storage integrated devices.
研究领域:
材料科学
·
能源化学
·
物理化学
·
电化学
·
功能材料
·
可持续能源
✓ 已验证
产品关联
DOI
高影响因子
WATER RESEARCH
·
2025
·
IF 12.4
Fang Zhao,Zhao Yang,Yifan Xiao,Ganghua Han,Kim R. Hardie,Mark Bartlam,Yingying Wang
The stereochemistry of antibiotics significantly affects resistance development. With rising antibiotic resistance, nanotechnology is emerging as a promising solution, potentially increasing the likelihood of nanoparticle coexistence with antibiotics in wastewater treatment plants (WWTPs). However, the influence of nanoparticles on chiral antibiotics induced resistance remains unclear. This study employed chemical characterization, metagenomics, and molecular docking to comprehensively elucidate the resistance mechanisms induced by the combination of silver nanoparticles (AgNPs) and chiral antibiotics (ofloxacin: OFL and levofloxacin: LEV). AgNPs significantly altered the abundance and composition of antibiotic and metal resistance genes, as well as the conjugative transfer of the RP4 plasmid among activated sludge communities, with the OFL_AgNPs combination exhibiting a higher resistance potential than LEV_AgNPs. Mechanistic studies revealed that chiral antibiotics selectively interact with AgNPs, promoting Ag + release, enhancing antibiotic uptake, and forming stable complexes. These interactions reshaped microbial functions, including cell membrane permeability, oxidative stress response, quorum sensing, and extracellular secretion, thereby shaping resistance profiles. This study reveals previously overlooked enantiomer-specific risks associated with nanoparticle-antibiotic interactions and provides a foundation for strategies to mitigate ARG dissemination in wastewater treatment and broader environmental systems.
研究领域:
环境微生物学
·
纳米毒理学
·
抗生素耐药性
·
废水处理
·
分子生态学
·
环境工程
·
化学生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Pengxu Wang,Chuanxiang Cheng,Yaqin Ma,Meng Jia
In this study, the temporal and spatial variation of mechanical effects (ME) and sonochemical effects (SE), the degradation behavior of polyphenols as well as the correlation coefficients were comprehensively analyzed. The ME and SE showed inverse dependence along with the axial direction of transducer. Higher irradiation distance (50 mm) enhanced the ME but inhibited the generation of hydroxyl radicals (8.29 μmol/L). Rutin and cyanidin-3-glucoside, compared with thermal degradation (70°C, 6.41%, and 11.45%), were more susceptible to free radical degradation due to the boost of SE at low temperature (10°C, 20.23%, and 34.41%). The concentration of hydroxyl radicals at 70°C (18.38 μmol/L) was about 5.77 times lower than that at 10°C (3.22 μmol/L). No significant differences in the ME were observed for a wide range of temperatures (10–70°C). The impacts of increasing duty cycle on further promoting the ME and SE were limited. The concentration of hydroxyl radicals (0–23.37 μmol/L) increased linearly with sonication time (0–45 min) and the degradation of caffeic acid only occurred on a time scale (25 min). The free radical scavenger can minimize the degradation of polyphenols by inhibiting the hydroxyl radicals (23.37 μmol/L without t-BuOH; 12.17 μmol/L with t-BuOH). The above results showed that the degradation of polyphenols attacked by hydroxyl radicals presented a dose-response relationship. The correlation between the hydroxyl radicals and polyphenols as well as the mechanical effects and extraction yield indicated that the stability of polyphenols exposed to ultrasonic field depended on the structure-radical scavenging activity relationship and the extraction may be accompanied by the degradation.
研究领域:
化学
·
食品科学
·
超声技术
✓ 已验证
产品关联
DOI
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2023
·
IF 8.4
Jiahui Chen,Jiale Chai,Xiaomei Sun,Ye Tao,Xing Chen,Guanghong Zhou,Xinglian Xu
The efficient synthesis of myofibrillar protein(MRN)-gallic acid (GAD) complex in ultrasound (UID)-assisted processing is a challenging problem in food manufacturing. In this investigation, the effect of viscosity characteristics on the efficiency of UID processing in MRN-based beverages was analyzed. Both viscosity and surface tension can increase sono-physico-chemical effects on the degradation of terephthalic acid and crystal violet, with surface tension having a more significant effect (negative correlation, R 2 = 0.99) than viscosity (positive correlation, R 2 = 0.79). The structural indicators and microstructure demonstrated that the reaggregation and refolding of the MRN structure during the modification procedure occurred with relatively small three-dimensional dimensions. Compared to the MRN/GAD4 group, the water contact angle of the MRN/GAD7 system enhanced by 129.44%, leading to greater system stability. The ABTS-scavenging capacity of the system increased by approximately 19.45% due to the increase in viscosity of these two categories.
研究领域:
食品科学
·
化学工程
·
生物技术
✓ 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）