ORGANIC ELECTRONICS
·
2019
·
IF 3.495
Xin Qi,Ganghong Liu,Duo Wang,Ning Zhu,Yuqing Zhang,Zehao Zhang,Cuncun Wu,Xiangdong Li,Wei Luo,Yingqiang Li,Haozhe Hu,Zhijian Chen,Lixin Xiao,Shufeng Wang,Bo Qu
Interfacial modification as a feasible strategy to improve the properties of perovskite solar cells (PSCs) has been widely studied in recent years. In this work, PbCl 2 modification at the interface of SnO 2 /CH 3 NH 3 PbI 3 was used for CH 3 NH 3 PbI 3 -based planar PSCs. The introduction of PbCl 2 between SnO 2 and CH 3 NH 3 PbI 3 layers boosted the crystallization of perovskite film, which promoted the photovoltaic properties of corresponding PSCs. The open circuit voltage ( V OC ) and fill factor (FF) of the PbCl 2 -modified devices (1 mg/mL) were 1.11 V and 0.79, respectively, which were both higher than those of the reference devices without PbCl 2 (1.04 V and 0.76). Moreover, a steady-state power output efficiency exceeding 19% was obtained for the PbCl 2 -modified devices (1 mg/mL), which implied that PbCl 2 modification was an effective and low cost strategy for efficient PSCs.
研究领域:
材料科学
·
光伏技术
·
纳米科技
·
表面与界面工程
·
能源材料
·
半导体器件
·
功能材料
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2017
·Vol. 42
·期 34
·22294-22301
·
IF 3.582
Jiang Li,Tianmu Lv,Nianjun Hou,Ping Li,Xueli Yao,Lijun Fan,Tian Gan,Yicheng Zhao,Yongdan Li
The effects of Mo doping into the B-site of La 0.3 Sr 0.7 TiO 3-δ perovskite on its ionic conductivity and catalytic activity as an anode material of solid oxide fuel cells have been investigated. The partial substitution of Ti by Mo reduces the bond energy between metal and oxygen ions in the perovskite. The concentration of Mo 5+ /Mo 6+ redox couples increases with the rise of the content of Mo, while the oxygen ionic conductivity decreases simultaneously. The doping of Mo significantly reduces the anodic polarization resistance and improves the performance of the single cell. The cell with La 0.3 Sr 0.7 Ti 0.97 Mo 0.03 O 3-δ anode and La 0.8 Sr 0.2 Ga 0.8 Mg 0.2 O 3-δ electrolyte exhibits a maximum power density of 135 mW cm −2 at 850 °C with hydrogen as fuel.
研究领域:
材料科学
·
电化学
·
能源材料
·
固态离子学
·
燃料电池技术
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Zhanwei Yang,Jin Wang,Hualei Chen,Hecheng Meng,Xiaobing Guo,Shujuan Yu
Two low-methoxy pectins (LMPs) were obtained by local electrochemical pH modification using an H-type double-layer water bath sealed electrochemical cell at the voltage of 180 V for 3 h. The weight-average molecular weight (Mw) of citrus peel pectin (CPP) prepared in the anodic part at room temperature (CPP-A 5/RT ) and in the cathodic part at 5 °C (CPP-C 5/RT ) were 346 kDa and 328 kDa, respectively, and the degrees of methylation (DM) were 36.8 % and 11.9 %. Moreover, the second-order kinetic model was most appropriate for the degradation processes, as free radicals were generated in the anodic part and β -elimination occurred in the cathodic part. Subsequently, CPP-A 5/RT and CPP-C 5/RT were utilized to fabricate food packaging film blending with polyvinyl alcohol (PVA), bcZnO (ZnO coupled with bentonite and colophony) nanorods , and Ca 2+ ions by casting method. Then the prepared films were studied for their ability to maintain the freshness of strawberries. The addition of Ca 2+ ions and bcZnO nanorods increased the thickness, water contact angle (WCA), and mechanical properties of the composite films, while decreased water vapor permeability (WVP). Therefore, the CPP-based films, supplemented with bcZnO nanorods and crosslinked with Ca 2+ ions by “egg-box” model, can serve as an antibacterial food packaging material for food preservation.
研究领域:
食品科学
·
高分子材料
·
食品包装
·
电化学改性
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纳米复合材料
·
农产品保鲜
✓ 已验证
DOI
高影响因子
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2024
·Vol. 221
·期 16
·2400342
·
IF 1.9
Jian Cheng,Xin Liu,Weichang Kong,Qingzheng Lei,Zhiyu Yu,Dun Liu
The fabrication of flexible electronics has gained extensive attention due to the growing demand of flexible devices. Among various methods, laser direct writing technology has emerged as a promising approach due to its advantages of high processing accuracy and simplicity. This research focuses on the preparation of copper microelectrodes using laser-induced reduction of CuO nanoparticles (Cu NPs) on polyethylene terephthalate films. First, the influence of various parameters on the conductivity of the copper microelectrodes is investigated. Second, flexible copper microelectrodes with a minimum resistivity of 62.29 μΩ cm and an adhesion grade of 4B level are successfully fabricated. Building upon these results, a capacitive pressure sensor is developed with optimal sensitivity of 3.99 Pa −1 , good hysteresis of 3.99%, and response and recovery times of 1.2 and 1.3 s, respectively. Repeatability tests confirm the sensor's stability and fatigue resistance. This research provides valuable insights for the production of flexible sensors.
研究领域:
生物医学工程
·
柔性电子学
·
传感器技术
·
纳米材料
·
微纳加工
·
可穿戴设备
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yuhua Dong,Jianbin Zheng
The work presented that by regulating the proportion between cobalt and 2-methylimidazole in distilled water, a series of Co-based imidazolate framework compounds with diverse shapes were synthesized at ambient temperature. The morphology and structural characteristics of the compounds were surveyed by scanning electron microscope, energy disperse spectra, powder X-ray diffraction and N 2 absorption-desorption. It was found by cyclic voltammetry that the zeolitic imidazolate framework compound synthesized at a ratio of 1:20 had the best electrocatalytic activity to H 2 O 2 reduction, therefore, the compound was chosen to fabricate a H 2 O 2 electrochemical sensor. Electrochemical studies indicated that the sensor had a determination limit of 0.7 μM and short response time within 3 s. The catalytic current was linear with H 2 O 2 concentration from 2.5 to 212.5, 212.5 to 1662.5 and 1662.5 to 6662.5 μM and the sensitivity were 12.2, 5.3 and 2.4 μA mM −1 cm −2 , respectively. Furthermore, the proposed sensor showed a good anti-interference capacity, repeatability and stability.
研究领域:
分析化学
·
材料科学
·
电化学
·
生物传感器
·
纳米材料
·
环境监测
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·Vol. 44
·期 12
·6148-6159
·
IF 4.084
Xiaoyu Zhang,Shiyuan Yu,Qian Zhu,Lianhua Zhao
The novel SP/IL/AMS composite membrane doped with amino-functionalized mesoporous silica (AMS) was successfully prepared. Sulfonated poly ether ether ketone (SPEEK, SP) was used as the polymer matrix and the ionic liquid (IL) was N -ethylimidazolium trifluoromethanesulfonate (EIm[Tfo]). Its properties were compared with SP/IL/NMS composite membrane doped with non-functionalized mesoporous silica (NMS). Fourier transform infrared spectroscopy (FT-IR) analysis indicated that the components in the composite membrane were bound by intermolecular forces. In addition, an acid-base interaction was formed between -NH 2 in AMS and -SO 3 H in SPEEK. The acid-base pair is beneficial to proton conduction. The anhydrous proton conductivity of SP/IL/3-AMS-7.5 composite membrane is about 4 times higher than that of the SP/IL/NMS-7.5. In addition, the good interfacial compatibility between AMS and polymer matrix is conducive for creation continuous proton transfer channel. Thermogravimetric analysis (TG) showed that all composite membranes were stable at 270 °C. The leaching of IL data indicated that IL can be effectively retained due to the presence of -OH and -NH 2 on the NMS and AMS surfaces. The SP/IL/AMS composite membrane could be used in proton exchange membrane fuel cells under medium temperature and anhydrous conditions.
研究领域:
材料科学
·
高分子化学
·
能源材料
·
燃料电池
·
膜科学
✓ 已验证
DOI
高影响因子
Small
·
2018
·Vol. 14
·期 34
·1801798
·
IF 9.598
Xiaohong Zou,Qian Lu,Yijun Zhong,Kaiming Liao,Wei Zhou,Zongping Shao
Gel-polymer electrolytes are considered as a promising candidate for replacing the liquid electrolytes to address the safety concerns in Li–O 2 /air batteries. In this work, by taking advantage of the hydrogen bond between thermoplastic polyurethane and aerogel SiO 2 in gel polymer, a highly crosslinked quasi-solid electrolyte (FST-GPE) with multifeatures of high ionic conductivity, high mechanical flexibility, favorable flame resistance, and excellent Li dendrite impermeability is developed. The resulting gel-polymer Li–O 2 /air batteries possess high reaction kinetics and stabilities due to the unique electrode–electrolyte interface and fast O 2 diffusion in cathode, which can achieve up to 250 discharge–charge cycles (over 1000 h) in oxygen gas. Under ambient air atmosphere, excellent performances are observed for coin-type cells over 20 days and for prototype cells working under extreme bending conditions. Moreover, the FST-GPE electrolyte also exhibits durability to protect against fire, dendritic Li, and H 2 O attack, demonstrating great potential for the design of practical Li–O 2 /air batteries.
研究领域:
电化学能源
·
材料科学
·
纳米复合材料
·
先进电池技术
·
固态离子学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Shujuan Lian,Xiaoshuang Shi,Mingyi Lu,Mengdan Zhang,Xiaohuan Dong,Xu Li,Quan Feng,Rongbo Guo
Due to the persistence in residue and the emission to environment, antibiotics have become the emerging contaminants. Tetracyclines, as the largest amount of antibiotics in the breeding industry, were investigated in this study. For eliminating the tetracyclines, anaerobic culture was enriched from livestock waste after four generations and FeOn(OH)m modified oyster shell powders (OSPs) were amended into the enrichment culture as auxiliary method. Tetracycline and oxytetracycline were selected as the model compounds. The adsorption models (Langmuir and Freundlich isotherms) of tetracycline and microbes on OSPs were simulated respectively. With the addition of FeOn(OH)m modified OSPs, the transformation efficiency of oxytetracycline achieved 81.5% after 22 days’ incubation, approximately 1.85 times higher than the 4th generation (G-IV) enrichment culture without modified OSPs. Dehydration, demethylation, dehydroxylation and decarboxylation took place under anaerobic condition, inferred from the detected metabolites transformed from oxytetracycline. Genus Methanosarcina and two operational taxonomic units (OTUs) assigned to order Clostridiales , showed an increasing trend on abundance, indicating the contribution to transformation of oxytetracycline. Therefore, the FeOn(OH)m modified OSPs and enrichment culture can accelerate the transformation of oxytetracycline simultaneously, indicating a promising utilization not only for waste water system but also for antibiotic contaminated biomass treatment.
研究领域:
环境微生物学
·
污染物生物降解
·
环境工程
·
抗生素去除
·
吸附材料
·
厌氧消化
·
药物代谢
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zihui Liang,Zezhu Zhou,Jing Li,Shiliang Zhang,Binghai Dong,Li Zhao,Congcong Wu,Huiyu Yang,Fengxiang Chen,Shimin Wang
As a luxurious textile for more than five thousand years, silk fibers/products have always been favored by consumers and the markets, but the poor photostability seriously hinders its utilization in fashionable apparel. Even if enduing the functionality of silk fiber through surface modification, it is often at the expense of its comfort. Here, an ultra-thin amorphous titanium dioxide nano-film with a thickness of only five in a thousand of fiber diameter and the add-on percentage ≤ 5.33% was prepared on the surface of silk fibers/fabrics by atomic layer deposition (ALD) methods. The tensile strength of the modified silk fiber maintains 89.17% of the original fiber after exposure to UV light for 672 h. They can also withstand multi-cycle laundering and accelerate light-aging, which exhibiting an excellent UV resistance. Most importantly, the functional coating has a negligible impact on the comfortable and wearability performance of silk fibers/fabrics. In addition, ALD-coated silk fabric is also further used as an outdoor reflective cooling material and achieving a superior thermal insulation effect with the temperature reduction up to 10.1 °C.
研究领域:
材料科学
·
纺织工程
·
纳米技术
·
表面科学
·
功能纺织品
·
光稳定性
·
生物医学材料
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Chang Chen,Kwok-ho Lam,Bao-jun Liu,Xian-hua Hou,Yu-ping Wu
Chemically integrated hybrid quantum dots ZnCo 2 O 4 /reduced graphene oxide (QDs ZCO/rGO) sheets nanocomposites are synthesized through polyol processes. rGO sheets grow and interweave to form basic skeletons. Ultrafine ZCO particles with a size of around 3.66 nm grow and embed on both sides of the rGO sheets, and the rGO sheets restrain the reunion of ZCO nanoparticles . The existence of rGO sheets and ZCO nanoparticles can engender the mutual synergistic effects so that hybrid QDs ZCO/rGO electrodes exhibit the excellent electrochemical properties . Owing to this special nanoparticles-on-sheets structure, the hybrid QDs ZCO/rGO electrodes exhibit an excellent initial discharge capacity for rechargeable lithium-ion batteries (1325.9 mAh g −1 at the current density of 200 mA g −1 ), high rate stability (532.3/566.1 mAh g −1 at 4000 mA g −1 ) and outstanding electrochemical cyclic stability (657.6/668.2 mAh g −1 at 2000 mA g −1 after 2000 cycles with a capacity retention of 68.6%). For full-cells, high initial reversible discharging capacity (646 mAh g −1 at 200 mA g −1 ) and good cyclic stability (514 mAh g −1 at 200 mA g −1 after 100 cycles) are obtained. The superior performance of the as-prepared electrodes is ascribed to the advantage of nano-sized particles. With the successful synthesis of hybrid QDs ZCO/rGO nanocomposites, the facile synthetic route and unique growth of nanostructuring method can be extended to high electrochemical performance electrodes for commercial lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
功能材料
·
先进电池技术
✓ 已验证
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2018
·Vol. 20
·期 27
·18455-18462
·
IF 3.906
Xiangyang Duan,Chao Ma,Wentao Jin,Xiaoman Ma,Lu’an Guo,Su-Huai Wei,Jinying Yu,Yelong Wu
A simple and efficient top-down strategy, the chemical vapor etching method, is reported for synthesizing corrugated ZnO nano/micro rods (NRs). The stabilization mechanism of this unique nanostructure has been determined through a combination of aberration-corrected field emission scanning electron microscopy, high-resolution transmission electron microscopy, and first-principles calculations. The experimental data are in good agreement with the theoretical calculations, and a remarkable nonpolar-to-polar surface faceting transition is demonstrated. The corrugated-shaped structure results from the remarkable stability of the defect-induced reconstructions (O vacancy, Zn–Zn dimer), which makes the high-index polar {301} and {10} planes lower in energy compared to the nonpolar {100} plane. Based on the results of first-principles surface calculations, a general formula is established to provide an accurate description of the unusual size effect of the length of the corrugated unit vs. the NR diameter, and it also offers direct explanations for certain experimental observations. The present study deepens our atomic-level understanding of the detailed structure and stability of polar surface decorated corrugated ZnO NRs, and points to a viable path towards designing polar-stable wurtzite structures.
研究领域:
材料科学
·
纳米科技
·
表面科学
·
凝聚态物理
·
计算材料学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Liyuan Zhang,Shu Yang,Yuekun Lai,Hui Liu,Yiang Fan,Cao Liu,Haiying Wang,Liyuan Chai
Gaseous Hg 0 is one of the most deadly and hard-to-dispose pollutants. The oxidation of Hg 0 is a promising route, but the rational design and synthesis of highly efficient catalysts still remain grand challenges. Herein, CuO@Cu 2 O (or Cu x O) heterostructured nanoparticles uniformly monodispersing on porous carbon monolith were designed and successfully synthesized using oligo( m -phenylenediamine)-Cu 2+ complex as raw material. The Cu x O-carbon catalyst contains ∼28 wt% of Cu. Based on density functional theory calculation, the CuO@Cu 2 O junction interfaces can accelerate the Hg 0 oxidation by significantly reducing the energy barriers of reaction. Only 1 mg of the catalyst can catalyze the oxidation of more than 90 % of Hg 0 with [HCl] = 0.5 ppm, [O 2 ] = 6 vol%, T = 150 °C. The poisoning effect of either SO 2 or H 2 O on the catalysts is weak. Moreover, a long-term test confirmed that the Hg 0 oxidation rate can maintain more than 90 % even in the co-presence of SO 2 (5000 ppm) and H 2 O (10 vol%).
研究领域:
环境催化
·
材料化学
·
大气污染控制
·
纳米材料
·
表面科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）