Coatings
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2021
·Vol. 11
·期 5
·523
·
IF 2.881
Cong Wang,Chengchen Xu
Chemical doping of boron atoms is essential to modify the electrical properties of graphene films. The synthesis of large-scale boron-doped graphene with high uniformity and good electrical properties is still a great challenge. To improve the quality and uniformity of boron-doped graphene, we introduced several methods to engineer the surface of the copper catalyst for chemical vapor deposition. The ethylic acid treatment proved to be more effective to remove surface impurities than the hydrochloric acid treatment. Moreover, electrochemical polishing showed the best performance in reducing the impurities and surface roughness in all the methods. The sheet resistance and carrier mobility of the boron-doped graphene film grown on the electropolished copper foil were 2.35 kΩ/□ and 1.15 × 103cm2·V−1·s−1at room temperature, respectively. Our results suggest that the boron-doped graphene grown on the electropolished copper catalyst possesses a high carrier mobility and less structural defects, which makes it suitable for application in optoelectronics.Keywords:boron-doped graphene;surface engineering;electrochemical polishing
研究领域:
材料科学
·
物理化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yuanxiang Xiao,Wenyue Liu,Hongfu Ru,Yuyun Yu,Shuangfei Xiang,Shujun Zhao,Feiya Fu,Hongyan Diao,Xiangdong Liu
The unprecedented pandemic has highlighted the need for textiles that rapidly inactivate pathogens to protect public health. However, how to achieve rapid, effective and durable pathogen inactivation with the minimum antimicrobial dose loading has become a major challenge for cotton fabric modification. Here, a surface engineering cotton fabric (Co-CMC@Cu 2+ ) was prepared by grafting carboxymethyl chitosan (CMC) onto cotton fabric and then loading with Cu 2+ via coordination. The Co-CMC@Cu 2+ with minimal copper ion dosage achieved rapid inactivation, excellent comfort, good biosafety, and durability. Specifically, Co-CMC modified with 12.5 mmol/L copper ion solutions achieved impressive bacterial reduction (BR) rates of 94.3 % and 89.3 % against E. coli and S. aureus , respectively, within 10 min of contact. Moreover, the bacteria were completely eradicated after 2 h of continuous contact. Additionally, Co-CMC@Cu 2+ achieved excellent phage reduction (PR) rates of 98.9 % and 100 % against phi6 and phi-x174 bacteriophages, respectively, within 30 min of exposure, highlighting its potential for viral inactivation. Furthermore, Co-CMC@Cu 2+ demonstrated exceptional durability for pathogen inactivation, with BR and PR values above 80 %, even after 150 washing cycles. This novel antimicrobial and antiviral cotton fabric will be a promising candidate textile to protect public health during a pandemic.
研究领域:
材料科学
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生物医学
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纺织工程
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产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
·
IF 15.7
Dai Zechuan,Chen Yanxu,Zhang Huaikun,Cheng Mingyu,Zhang Bocheng,Feng Pingyi,Feng Yafei,Zhang Genqiang
Electrochemical urea synthesis has recently emerged as a fascinating energy-efficient alternative route, while it remains challenging to achieve simultaneously high production rate and Faradaic efficiency. Herein, we realize an energy-favorable electrochemical C-N coupling path through CO 2 and NO 3 − co-reduction at the heterointerfaces of Cu/Cu 2 O microparticles, generated by in-situ electrochemical engineering on bulk Cu 2 O. We achieve urea production rate of 632.1 μg h −1 mg cat. −1 with a corresponding Faradaic efficiency of 42.3% at −0.3 V (versus RHE) under ambient conditions. Operando synchrotron radiation-Fourier transform infrared spectroscopy, along with theoretical calculations, reveals the coupling of intermediates NOH* and CO* at the heterointerfaces, benefiting from the modified electronic structure. This work provides a practical route for catalyst design and insights into urea electrosynthesis systems.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
WATER RESEARCH
·
2025
·
IF 12.4
Xuesong Li,Man Xu,Xin Liu,Qianhong She,Woei Jye Lau,Linyan Yang
Nanofiltration (NF) membranes hold great promise for lithium (Li) recovery from brines, with numerous studies focusing on improving Li/Mg separation performance. However, real brine environments pose significant challenges, as fouling and scaling severely hinder Li recovery efficiency. Despite their critical impact, these challenges have received limited attention. This study addresses these issues through surface engineering of polyamide (PA) NF membranes, achieving a positively charged, ultra-smooth surface. The engineered membrane demonstrated exceptional fouling and scaling resistance during real brine treatment, exhibiting only a 12% flux decline over 12 hours, compared to 28% and 20% for the control and commercial NF270 membranes, respectively. This superior antifouling performance enabled sustained high Li flux (>80 mM·m⁻ 2 ·h⁻ 1 ) while reducing the Mg/Li mass ratio from 4.1 in the feed to 1.4 in the permeate. Additionally, the membrane displayed remarkable resistance to scaling in synthetic brine containing high concentrations of Ca 2+ and SO 4 2 ⁻. Systematic evaluations in both synthetic and real brines revealed that the enhanced process stability arises from the synergistic effects of reduced surface roughness and optimized surface charge, which together minimize foulant adhesion and mitigate scaling. These findings mark a significant advancement toward the practical implementation of membrane-based Li recovery, underscoring the critical importance of addressing fouling and scaling in real brine environments.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
Catalysis Science & Technology
·
2016
·Vol. 6
·期 24
·8516-8524
·
IF 5.287
Lei Huang,Kaiwen Zha,Supawadee Namuangruk,Anchalee Junkaew,Xin Zhao,Hongrui Li,Liyi Shi,Dengsong Zhang
Surface engineering of TiO2 is significant in the SCR reaction and worth studying. In a previous study, we found that TiO2 nanosheets (TiO2-NS) with the (001) plane exhibited a much better SCR performance than TiO2 nanoparticles (TiO2-NP) with the (101) plane. In this work, in situ DRIFTS and DFT calculations were applied to address the promotional effect of the (001) plane of TiO2-NS in the SCR reaction. The behavior of adsorption and desorption of NOx and NH3 on the two surfaces was studied. It was found that NH3 adsorbed on both TiO2-NS and TiO2-NP was in the form of NH3(g) on the Lewis acid sites. NOx on TiO2-NP were mainly trans-(NO)2 and N2O4 which were non-reactive. Differently, NO on TiO2-NS was mainly in the form of NO2 which was probably due to the high energy and abundant active oxygen species of the (001) facet. The formed NO2 could trigger the subsequent ‘fast SCR’ reaction thereafter promoting the activity. Therefore, TiO2-NS with more (001) facets had better SCR activity than TiO2-NP with the exposed (101) facet.
研究领域:
环境科学
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催化化学
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2023
·
IF 8.4
Ming Ya,Jianghao Wang,Guangshe Li,Guichen Gao,Xu Zhao,Jiawen Cui,Haijun Wu,Liping Li
Spinel-type oxides exhibit great potential for the electrocatalytic oxygen evolution reaction (OER) due to their variable surficial composition and electronic structure. Herein, taking MgCo2O4 as a prototype, we put forward a surface engineering procedure to tailor the surface composition and valence state of cobalt ions for enhancing the OER performance. We discovered that the calcination temperature can finely tailor the ratio of Co/Mg and Co3+/Co2+ on the surface of MgCo2O4. MgCo2O4 with the maximum ratio of Co3+/Co2+ gives a current density of 10 mA cm–2 at a small overpotential of 283 mV. Such an overpotential is significantly lower than that of most cobalt-based spinel oxides ever reported. X-ray photoelectron spectra demonstrate that increasing the ratio of Co3+/Co2+ plays key roles in improving the OER performance. This work furnishes an instructive idea in pursuit of spinel-type oxides with high OER catalytic activity and stability by surface engineering.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2024
·
IF 8
Xingyi He,Tianfeng Li,Zifan Liang,Renming Liu,Xia Ran,Xiaojuan Wang,Lijun Guo,Caofeng Pan
The emission of cyan light (470-500 nm) plays a vital role in the visible light spectrum and is essential for applications such as lighting, displays, and optical communication. Inorganic cesium lead bromide perovskite quantum dots (CsPbBr 3 PQDs) have made significant progress in the field of luminescence materials and devices, however, the lack of techniques to obtain highly emissive and stable cyan-emitting CsPbBr 3 PQDs has limited their device applications. Here, it is demonstrated that the complete surface passivation by treatment of didodecyldimethylammonium bromide (DDAB) and lead bromide, which can enhance the photoluminescence and stability of cyan emitting CsPbBr 3 PQDs. In particular, the photoluminescence quantum yield of CsPbBr 3 QDs can be greatly improved from 10.5% to 83.8%. Through an effective PMMA passivation, the obtained stable and bright CsPbBr 3 PQDs composite films as the cyan color converters can effectively emit the cyan light to fill the “cyan gap” of white light-emitting diode (WLED). The color rendering index value of such WLED is remarkably enhanced from 73.6 to 82.5. This study paves the way for the application of PQD color converters in the next generation of full-visible-spectrum WLED lighting.
研究领域:
材料科学
·
光学工程
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jinwei Qin,Peng Zhao,Jie Meng,Shixiang Zuo,Xiaohui Wang,Wei Zhu,Wenjie Liu,Jingwei Liu,Chao Yao
Higher specific surface area and abundant surface oxygen vacancies are considered to be essential to the catalytic combustion. Herein, we elaborately fabricated an innovative catalyst on the basis of LaMnO 3 @Co 2 MnO 4 under a controllable selective dissolution (SD) treatment for ethane catalytic combustion. La element in perovskite could effectively protect the spinel system as a sacrifice, with MnO 2 covering on the spinel surface, thereby enhancing the activity and stability. In combination with XPS, in-situ DRIFT and various characterization results, this acid corrosion could provide induce better reducibility, larger specific surface area, higher Mn 4+ and Co 3+ content and more oxygen vacancies , which played a significant role in promoting the adsorption, activation and decomposition of ethane. Among all as-prepared catalysts, the optimal performance for catalytic ethane combustion was achieved on LMO@CMO-10 catalyst. The T 90 of LMO@CMO-10 was 341 °C under space velocity of 80,000 mL·g −1 ·h −1 . This work not only fabricated the catalyst system with higher specific surface area and more oxygen vacancy by SD method, but also provided a potential strategy for the preparation of highly active catalysts.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the American Chemical Society
·
2019
·
IF 14.695
Wei Wang,Lianjing Zhao,Yuan Wang,Weinan Xue,Fangfang He,Yiling Xie,Yan Li
Sufficient loading of presynthesized quantum dots (QDs) on mesoporous TiO2 electrodes is the prerequisite for the fabrication of high-performance QD-sensitized solar cells (QDSCs). Here, we provide a general approach for increasing QD loading on mesoporous TiO2 films by surface engineering. It was found that the zeta potential of presensitized TiO2 can be effectively adjusted by surfactant treatment, on the basis of which additional QDs are successfully introduced onto photoanodes during secondary deposition. The strategy developed, that is, the secondary deposition incorporating surfactant treatment, makes it possible to load various QDs onto photoanodes regardless of the nature of QDs. In standard AM 1.5G sunlight, a certified efficiency of 10.26% for the QDSC with Cu2S/brass counter electrodes was achieved by the secondary deposition of Zn–Cu–In–Se QDs.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Electronic Materials
·
2024
·
IF 4.3
Zeyi Wu,Mengyao Su,Xiangyu Song,Denghua Li,Xinyuan Li,Jiajia Liu,Jiatao Zhang
Surface termination and defects of metal oxide semiconductors are crucial in the process of gas adsorption–desorption and signal transduction, thereby determining their sensing performance. Herein, a facile solvent-assisted surface engineering strategy was demonstrated to synthesize anatase TiO2 nanosheets (TNS) for an ultraviolet (UV) light-activated isopropanol (IPA) gas sensor. Surface-fluorinated TiO2 nanosheets (F-TNS) were first synthesized by the hydrofluoric acid-assisted hydrothermal method and followed by hydrothermally treating in Na2S solutions with different concentrations. The effect of the progressive removal of fluorides was discussed in detail based on X-ray photoelectron spectroscopy (XPS), diffuse reflectance spectroscopy (DRS), electrochemical impedance spectroscopy (EIS), and in situ Fourier transform infrared (FTIR) spectroscopy analyses. Compared with F-TNS, the chemiresistive sensor based on the TNS with a trace amount of fluorine exhibited a 324% increase in the sensitivity to 50 ppm of isopropanol at 50 °C under UV irradiation (λ = 365 nm, 30 mW/cm2), while it exhibited a 45% decrease in the recovery time. The enhanced isopropanol sensing performance could be attributed to the high surface area, rational surface terminations, oxygen vacancies, and UV photoexcited charge carriers, which further modulate the surface reaction and charge transfer. These findings offer a facile strategy for the rational design of oxide-based sensing materials, which help in understanding the function of surface terminations and defects in gas sensing.
研究领域:
材料科学
·
传感器技术
·
表面化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xiaqing Meng,Jun Wang,Qian Chen,Zicheng Xuan,Zelin Wu,Yan Zhang,Xifan Chen,Junying Wang,Junzhong Wang
The miniaturization, intense integration, and high-density power of modern electronic and energy devices necessitate extensive management of thermal energy and electromagnetic waves. Creating lightweight, stable, and multifunctional materials to meet these demands remains a challenge. Here, we describe preparing graphene aerogel through the condensation dehydration of hydrophilic polymers and further forming scenario-adaptive multifunctional films through 2500 °C heat treatment and paraffin hybridization. The graphene materials exhibit extensive thermal management with high performances covering high thermal conductivity (up to 76.4 W·m −1 ·K −1 ), superior heat dissipation, tunable electro-thermal conversion, cycling heat storage, and flame retardancy. Additionally, they provide tunable and effective electromagnetic interference shielding performances with high specific shielding effectiveness (up to an average of 91.6 dB, maximum of 123 dB) in a wide frequency range, featuring anti-corrosive absorption-dominant shielding across the X-band, Ku-band, and K-band. Surface engineering of graphene including tuning surface chemical groups and interface couplings contributes to flexible thermal management and electromagnetic shielding. This work might offer a green strategic approach to developing extensive thermal and electromagnetic wave managements of graphene materials.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2019
·
IF 2.781
Hongjian Chen,Xue Wang,Lixiu Guan,Lei Chen,Junguang Tao
Tin monoxide is an important functional material , which is widely used in energy storage and optoelectronic devices. In this work, SnO micro-plates were synthesized by low-temperature hydrothermal method using aqueous ammonia as reducing agent. The thickness and surface morphology of the SnO micro-plates were delicately controlled by adjusting ammonia concentration. It is shown that surface modification has significant effect on their supercapacitor performance. Specifically, an ultra-high specific capacity of 1080 F•g −1 is obtained, which reaches ~75% of its theoretical faradaic capacitance value. Considering the typical thickness of ~250 nm, the electrons/ions can diffuse ~90 nm into the sample. In addition, the capacity remains an impressive value of 849 F•g −1 after 1000 cycles at current density of 1 A•g −1 , suggesting excellent stability. Our studies show that the non-transition metal oxide, SnO, is a promising supercapacitor electrode material with high specific capacity and good cycle stability.
研究领域:
材料科学
·
能源存储
✓ 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）