ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Shiwei Yu,Houliang Sun,Zaka Ullah,Ledi Chen,Xiaowei An,Mingliang Chen,Shoupu Zhu,Liwei Liu,Qi Li
High-performance optoelectronic bifunctional cathode materials may simultaneously seize and store solar energy in lithium-ion batteries to boost their storage capacity. However, such photoactive cathodes with typical intrinsic features are generally limited for UV light applications and offer poor sunlight harvesting which results in lower energy density. Here, the assembly of two oligomers, poly(vat blue 6) (PVB6) and poly(vat blue 6 sulfide) (PVB6S) is reported, through polymerization to extend the conjugated structure of organic optoelectronic small molecules. These oligomers are effectively employed as photo-assisted bifunctional cathodes for lithium-ion batteries. The extended conjugated structure narrows the energy gap, promoting exciton dissociation and expanding the light absorption region. PVB6S possesses a narrow energy gap of 1.565 eV, and the discharge-specific capacity of the battery with PVB6S is enhanced from 203 to 411 mAh g −1 under light illumination, which is approximately twice the original capacity. This demonstrates the extended conjugated structure and charge separation in a cell, which synergistically contributes to the rational design of photo-assisted bifunctional cathode materials and complementary enhances the performance of lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
光电学
·
能源存储
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Fugong Qi,Zhenwen Yang,Jinfeng Zhang,Ying Wang,Qiwen Qiu,Huijun Li
Modified metal oxides with narrow band gaps have attracted great interest in photothermal applications because of their wide optical absorption range. To tune wide band gap metal oxides into visible and near-infrared responsive materials, we deploy a unique interfacial reaction-induced defect engineering approach, which enables us to effectively modify the electronic structure of metal oxides by introducing oxygen vacancy defects. This approach reduced the band gap of zirconia from 5.47 to 1.38 eV, accompanied by a color change to black. More importantly, it is not limited by the size of the metal oxides, and bulk black zirconia was successfully obtained for the first time. It has been demonstrated that the prepared black zirconia can be applied as an effective photothermal therapy agent in vitro. Additionally, the interfacial reaction-induced defect engineering approach has been successfully extended to enhance the optical absorption of other metal oxides.
研究领域:
材料科学
·
纳米技术
·
光热治疗
·
缺陷工程
·
光学材料
✓ 已验证
DOI
高影响因子
DESALINATION
·
2018
·
IF 6.603
Hadi Attia,Daniel J. Johnson,Chris J. Wright,Nidal Hilal
A novel approach to enhance membrane performance using electrospinning fabrication technique for recovery of heavy metals using air-gap membrane distillation is described. Accordingly, a comprehensive study was accomplished to fabricate a unique electrospun dual-layer membrane (ESD) with an upper superhydrophobic layer and hydrophobic electrospun support layer and compare with a superhydrophobic electrospun single layer membrane (ESS). Superhydrophobic alumina nanoparticles (Al 2 O 3 ) were embedded in a low polymer concentration of polyvinylidene fluoride (PVDF) to produce superhydrophobic ESS and top layer of ESD using electrospinning technique , while a mat with different concentrations of PVDF were used as hydrophobic electrospun support layer. In this study, dual layer membranes were fabricated in two sets. In the first set, layer thickness was varied by changing the spinning volume of the top and support layer with maintain total spinning volume, while in the second set the fibre diameter of the support layer was varied by changing the polymer concentration. Moreover, the electrospun membranes were characterized in terms of membrane performance such as: permeate flux , heavy metal rejection and energy consumption; wettability performance such as liquid entry pressure (LEP), and water contact angle (WCA); membrane structure such as mean with maximum pore size and porosity; membrane integrity such as mechanical and thermal integrity. The heavy metal rejection was >99% for all single and dual layer membranes when filtering artificial wastewater (Pb, Cd, Cr, Cu, Ni). When compared with single layer electrospun membrane made from spinning 16 ml PVDF, dual layer membrane made from the same spinning volume exhibited some improvement, such as higher permeate flux above 23 l/m 2 ∙h (LMH) when filtering 2500 ppm concentration heavy metal feed water . Additionally, both sets of dual layer membrane demonstrated better mechanical performance and slight reduction of LEP compared with single layer electrospun membrane.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Xiaoming Li,De Zhang,Le Wang,Lu Yin,Xiaohua Qi,Minqiang Zou,Qiang Chen,Zhi Yu,Pei Liang
Sensitive and reliable interfacial self-assembled nanomembranes are widely used for the detection of chemical contaminants in food and environment. This study developed a high-performance Surface-Enhanced Raman Spectroscopy (SERS) analytical platform by self-assembling Au nanoparticles (AuNPs) at the three-phase liquid–liquid interface. The assembled nanoparticles arrays were immersed in halogen ions solution and the nanoparticle gaps were further shrunk through electrostatic interactions, resulting in a large-scale array of closely packed nanoparticles. The average gap between adjacent nanoparticles was less than 3 nm, where dense SERS ‘hot spots’ were generated and used for highly sensitive detection . The homogeneity of the self-assembled nanoparticle arrays under different conditions was still guaranteed despite the reduced integration time and the number of times in the mapping face sweep of the Au arrays. The improved high-throughput fabrication of self-assembled nanoparticle arrays in this way holds great promise for the development of a sensitive and reliable SERS platform for chemical contaminant monitoring.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Min Zhang,Yunyuan Dong,Mengling Peng,Xiaobin Chen,Qifu Zheng,Jianming Liao,Wei Chen
Construction of carbon-based heterostructural photocatalyst materials with high electron transfer rates is a practical and effective strategy for the mineralization of organic pollutants and removal of toxic metal ions under visible-light irradiation. This study developed a facile hydrothermal route to prepare a series of heterojunction photocatalysts, wherein Zn x Cd 1- x In 2 S 4 nanosheets were immobilized on nitrogen and phosphorus co-doped hollow carbon spheres (N, P-C) to form N, P-C@Zn x Cd 1- x In 2 S 4 nanocomposites. Comprehensive characterization of the nanocomposites revealed that the tuning of the Zn/Cd molar ratio could effectively modulate the Zn x Cd 1− x In 2 S 4 energy band structure. Moreover, Zn 0.5 Cd 0.5 In 2 S 4 had the most negative conduction band position and loads on non-metal-doped carbon, with superior carrier transport properties and separation efficiency. N, P-C@Zn 0.5 Cd 0.5 In 2 S 4 (N, P-C@ZCIS2) exhibited the best photocatalytic activity for tetracycline hydrochloride degradation and Cr(VI) reduction, with rate constants of 0.04822 mg −1 min −1 and 0.14303 min −1 , respectively. Notably, the photocatalysts exhibited good activity and stability even after cycle experiment. This study provides new insights into the design of carbon-based heterojunction photocatalysts for the removal of harmful chemicals.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Zongliang Xiao,Weizhen Liu,Gan Wan,Jianlei Liu,Lu Yu,Qian Zhang,Lei Han
The quest for advanced full-spectrum lighting technologies has driven the development of W-LEDs, while challenges remain in finding effective cyan emitters and ensuring outstanding thermostability. This study detailed the synthesis of the europium-doped CaO-Al 2 O 3 -SiO 2 -YF 3 glass-ceramics (GCs), which demonstrated efficient cyan emission when irradiated by 419 nm light, with a spectacular internal quantum efficiency of up to 83.24 %, and outstanding thermal stability of 90.2 %@100℃ compared to room temperature intensity. In practical applications, this GC was integrated with a 420 nm LED chip, (Sr, Ca)AlSiN 3 : Eu 2+ red and Y 3 Al 5 O 12 : Ce 3+ yellow phosphor in a prototype full-spectrum W-LED device. The device achieved an excellent color rendering index (94), appropriate chromaticity coordinates (0.3789, 0.3950), and a well-defined correlated color temperature (4163 K). This study not only advances the application of GCs within W-LED technology but also reveals their potential in driving energy-saving and eco-friendly lighting solutions, thus providing a path to achieve superior full-spectrum lighting technology.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2019
·Vol. 34
·期 12
·2057-2066
·
IF 1.982
Mingjing Zhang,Xiaofang Zhang,Pengzhi Guo,Jie Lv,Xunchang Wang,Junfeng Tong,Yangjun Xia
Two wide band gap conjugated polymers, namely PBDT-TT25 and PBDT-TT36, derived from (4,8-bis(4,5-dioctyl-thiophen-2-yl)benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl)bis(trimethylstannane) with 2,5-dibromothieno[3,2-b]thiophene (TT25) or 3,6-dibromothieno[3,2-b]thiophene (TT36), have been synthesized by simply altering the linker positions of thieno[3,2-b]thiophene unit. The impact of linker positions on the energy levels, aggregation, active layer morphology, and optical and photovoltaic properties was evaluated systemically. We found that the absorption was greatly broadened, and the highest occupied molecular orbital (HOMO) energy level was elevated as the result of the significantly reduced twist angle on the polymer backbone when the linker positions changed from 3,6-isomer to 2,5-isomer. Therefore, the optimal inverted polymer solar cells exhibited a 1.87 times enhancement in power conversion efficiencies (PCE), which was mainly ascribed to the higher short circuit current densities (JSC) and fill factor (FF) of the devices mainly benefited from the widened, stronger absorption, higher hole mobility, and more ordered structure.
研究领域:
材料科学
·
光伏技术
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Rui Zhang,Xue Luo,Feiyu Zhao,Qiang Xu,Yang Xu,Yang Xu,Shuo Chen,Xianping Fan,Xvsheng Qiao
GeSe is a narrow band gap semiconductor with feasible application as infrared photoelectric devices . However, challenges are still maintained to improve their carrier concentration and conductivity for broader scope of photodetector applications. Aiming at such scope, the Ge 1- x Sn x Se (0 < x < 0.2) were synthesized via a facile “one-pot” wet chemical method and a lattice site substitution strategy. Compared to the pure GeSe micro-sheets the synthesized Ge 1- x Sn x Se micro-sheets possessed a smaller band gap (0.914 eV) and a better electrical conductivity (2.80 × 10 −5 Ω −1 cm −1 ), where the former exhibit greatly improved photo-current. The Ge 1- x Sn x Se micro-sheet was then assembled into a photodetector device to demonstrate its remarkable photo responsivities in visible to NIR spectral region (3614 A/W at 532 nm and 86 A/W at 1319 nm). The photo-detection range broadening and the responsivity enhancement can be attributed the carrier concentration increment as well as the band gap narrowing. Therefore, the Ge 1- x Sn x Se micro-sheets can be considered as an excellent candidate that can be applied as high performance photodetectors in the visible to near infrared region.
研究领域:
材料科学
·
半导体物理
✓ 已验证
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2020
·Vol. 26
·期 36
·8129-8136
·
IF 4.857
Siqi Wei,Xinghang Yin,Haoyi Li,Xiaoyu Du,Limei Zhang,Qiang Yang,Rui Yang
Graphical Size doesn′t always matter : Various nitrogen-doping model compounds (DMF, urea, ethanamide, and formamide) and carbon source citric acid are employed to realize multi-color emission carbon dots (blue, green, yellow, and red) under solvent-free condition. Notably, experimental results show that the size effect is not the dominant mechanism to achieve multi-color fluorescence emissions (see scheme). Four types of carbon dots (CDs) with various color (blue, green, yellow, and red) emissions have been synthesized under solvent-free conditions from citric acid and different nitrogen sources (DMF, urea, ethanamide, and formamide). By detailed characterization and comparison, it is confirmed that the graphitized sp 2 conjugated domain and surface functional groups such as C−O and C=N play synergetic roles in adjusting the fluorescence properties. Notably, the size effect is not the dominant mechanism to achieve multi-color fluorescence emissions in this work. The structural configuration of the carbon dots further influences the energy band structure, as demonstrated in simplified energy level diagrams. An absorption peak at approximately 560 nm appears in the visible light region for red-emitting CDs, assigned to an n→π* transition of the aromatic structure, thus introducing a new surface state energy level, resulting in a reduction in the energy of electron transition and the expansion into the visible region of the UV/Vis spectrum. Taking advantage of the diverse absorption and emission properties, different CDs/TiO 2 binary composites are obtained for photocatalytic degradation of organic dyes, and it is found that the absorption range in terms of visible light and the band gap of the carbon dots make a difference to the photocatalytic performance of the composites.
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Jianchang Gan,Huihu Wang,Haiping Hu,Ming Su,Feng Chen,Huang Xu
By rationally adjusting the band position of CuInZnS in CuInZnS/g-C 3 N 4 hybrids, we reveal the effects of fine turning the band matching on CO 2 reduction and methyl orange near-infrared degradation. The novel design strategy of CuInZnS/g-C 3 N 4 hybrids, including orderly energy band regulation of CuInZnS and surface carboxylation of g-C 3 N 4 , effectively enhances the light absorption capacity and separation efficiency of photogenerated carriers. In addition, L-cysteine was used as sulfur source for in situ synthesis of hybrids. Using the abundant functional groups of L-cysteine molecules to form bonds and interactions with carboxylated g-C 3 N 4 can effectively improve the dispersion and interface binding of CuInZnS/g-C 3 N 4 hybrids, thus enhancing the transport of carriers at the interface. Benefitting from band matching and interface binding characteristics, the optimized CuInZnS/g-C 3 N 4 hybrids manifest remarkable performance for CO 2 reduction with high CO production rate of 50.04 μmol/g in 8 h and excellent activity for methyl orange near-infrared degradation with 96.5% efficiency in 5 h.
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 FUNCTIONAL MATERIALS
·
2022
·Vol. 33
·期 1
·2210278
·
IF 19.924
Xiaohui Lin,Long Chen,Chenglin He,Yiliu Wang,Xu Li,Weiqi Dang,Kun He,Ying Huangfu,Dan Wu,Bei Zhao,Bo Li,Jia Li,Xidong Duan
Single crystal metal halide perovskites thin films are considered to be a promising optical, optoelectronic materials with extraordinary performance due to their low defect densities. However, it is still difficult to achieve large-scale perovskite single-crystal thin films (SCTFs) with tunable bandgap by vapor-phase deposition method. Herein, the synthesis of CsPbCl 3(1– x ) Br 3 x SCTFs with centimeter size (1 cm × 1 cm) via vapor-phase deposition is reported. The Br composition of CsPbCl 3(1– x ) Br 3 x SCTFs can be gradually tuned from x = 0 to x = 1, leading the corresponding bandgap to change from 2.29 to 2.91 eV. Additionally, an low-threshold (≈23.9 µJ cm −2 ) amplified spontaneous emission is achieved based on CsPbCl 3(1– x ) Br 3 x SCTFs at room temperature, and the wavelength is tuned from 432 to 547 nm by varying the Cl/Br ratio. Importantly, the high-quality CsPbCl 3(1– x ) Br 3 x SCTFs are ideal optical gain medium with high gain up to 1369.8 ± 101.2 cm −1 . This study not only provides a versatile method to fabricate high quality CsPbCl 3(1– x ) Br 3 x SCTFs with different Cl/Br ratio, but also paves the way for further research of color-tunable perovskite lasing.
研究领域:
材料科学
·
光学
·
凝聚态物理
·
半导体物理
·
光电子学
·
纳米科技
·
功能材料
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jun-jie Qu,Chang-liu Xiang,Chong Chang,Si-jun Zhu,Tian-xi Huang,Yuan-jian Liu,Xin-bing Xia,Sheng-hai Yang,Chang-hong Wang,Yong-ming Chen
Green methanesulfonic acid (MSA) system offers a promising alternative to the traditional fluosilicic acid (H 2 SiF 6 ) method for lead electro-refining. However, the MSA system has yet to produce efficient electro-refining process, high-quality cathodic lead and stable anodic dissolved layer concurrently, which is crucial for its practical application. Herein, we propose an MSA-based system — enhanced with Lugalvan NES (NES) and calcium lignosulfonate (CL) — for efficient and high-quality lead electro-refining. In both proof-of-concept and separate high-flux flow operations, we achieve a low energy consumption of 73.06 kWh e /t Pb and a high Faradaic efficiency of 99.11 %. Dense deposits with ultra-low grain sizes under 20 nm and high purities of over 99.99 %, and uniform dissolved layers with moderately adhesive anode mud are obtained. Theoretical simulations reveal the HOMO and LUMO energy levels of the additives and their adsorption energy on the Pb interface. Electrochemical analysis indicates a cathodic three-dimensional nucleation process and an anodic mechanism of uniform dissolution. A modular micro-kinetics model is developed to elucidate energy performance. These advances represent a significant step forward for lead electro-refining, achieving efficient operation and high-quality output while reducing energy use and surpassing the efficacy of the traditional method.
研究领域:
电化学
·
湿法冶金
·
可持续工程
·
材料科学
·
绿色化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）