INORGANIC CHEMISTRY
·
2017
·
IF 4.857
Molin Zhou,Xin Jiang,Xingxing Jiang,Ke Xiao,Yangwu Guo,Hongwei Huang,Zheshuai Lin,Jiyong Yao,Chen-Ho Tung,Li-Zhu Wu,Yicheng Wu
A new Au-based sulfide BaAu2S2 was obtained through solid-state reaction. It crystallizes in the tetragonal space group I41/amd with unit cell parameters of a = 6.389 72(2) Å, b = 6.389 72(2) Å, c = 12.7872(1) Å, and Z = 4. Its structure features [AuS2/2]∞ zigzag chains composed of corner-sharing AuS2 linear units. With a direct band gap of 2.49 eV, BaAu2S2 is suitable for the visible-light harvesting. Moreover, it exhibits excellent visible-light photocatalytic activity, which is 1.3 times that of graphitic carbon nitride (g-C3N4) and also demonstrates excellent circulating stability. On the basis of the crystal and electronic structure analysis, the electrons are highly delocalized along the [AuS2/2] chains, and the electron effective mass of BaAu2S2 is only approximately one-fifth of that of g-C3N4, which may help the separation of the electron/hole pairs during the photocatalytic process. Additionally, the absorption coefficient of BaAu2S2 is extremely high, exceeding 1 × 104 cm–1 over the entire absorbable visible spectrum (hν > Eg), which is significantly higher than that of g-C3N4. Such factors may contribute to its outstanding photocatalytic performances. According to our best knowledge, BaAu2S2 is the first noble metal-based chalcogenide photocatalyst reported as intrinsic light-harvesting and electron/hole-generating centers. This study may provide valuable insights for further research on photocatalytic materials.
研究领域:
材料科学
·
光催化
✓ 已验证
DOI
高影响因子
ChemSystemsChem
·
2021
·Vol. 3
·期 5
·e2100006
·
IF 0
Yan Huang,Xiaoliang Wang,Junbo Li,Youping Lin,Haixu Chen,Xiaoman Liu,Xin Huang
Graphical Dynamic regulation of coacervate microdroplets as a protocell model has attracted more and more attention in recent years. However, the dynamic regulation of enzymatic reactions has not yet been achieved. A method to regulate enzymatic reactions rate by assembly-disassembly-reassembly of light-induced coacervates is proposed, which could pave the way to the further development of dynamic coacervate-based protocells. Membrane-free coacervate microdroplets are widely utilized as protocell or membrane-less organelle models in the study of cell physicochemical properties. Dynamic regulation of coacervate microdroplets is of great significance because of the close connection between the formation/dissociation of condensate in vivo and physiology and pathology. Here, we describe light-responsive coacervate microdroplets prepared from azobenzene cation trans-azobenzenetrimethylammonium bromide (trans-azoTAB) and anion succinylated amylose (Su-Amy), which are formed by hydrophobic interaction and electrostatic interaction. The rapid and accurate response of azoTAB to light makes the microdroplets disassemble and reassemble within seconds under UV and within minutes under blue light, which provides a method to regulate the enzymatic reaction rates by the light-induced assembly-disassembly-reassembly of the coacervate microdroplets. Our results show a new type of membrane-less protocell model that can realize flexible spatiotemporal control and demonstrate a method for dynamically regulating the rate of enzymatic reactions inside the microdroplets, which provides a feasible scheme for exploring the relationship between physiology and disease in vitro .
研究领域:
化学
·
生物材料科学
·
细胞生物学
·
生物物理学
✓ 已验证
DOI
Science Advances
·
2019
·Vol. 5
·期 8
·
IF 12.804
Yuequn Shang,Yuan Liao,Qi Wei,Ziyu Wang,Bo Xiang,Youqi Ke,Weimin Liu,Zhijun Ning
Organic-inorganic hybrid halide perovskites are emerging as promising materials for next-generation light-emitting diodes (LEDs). However, the poor stability of these materials has been the main obstacle challenging their application. Here, we performed first-principles calculations, revealing that the molecule dissociation energy of Dion-Jacobson (DJ) structure using 1,4-bis(aminomethyl)benzene molecules as bridging ligands is two times higher than the typical Ruddlesden-Popper (RP) structure based on phenylethylammonium ligands. Accordingly, LEDs based on the DJ structure show a half-lifetime over 100 hours, which is almost two orders of magnitude longer compared with those based on RP structural quasi–two-dimensional perovskite. To the best of our knowledge, this is the longest lifetime reported for all organic-inorganic hybrid perovskites operating at the current density, giving the highest external quantum efficiency (EQE) value. In situ tracking of the film composition in operation indicates that the DJ structure was maintained well after continuous operation under an electric field.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2017
·
IF 3.531
Haohui Huo,Xiaoyan Ma,YeQing Dong,Fengjin Qu
A novel light- and temperature-responsive amphiphilic ABC miktoarm star terpolymer consisting of hydrophilic poly(ethylene glycol) (PEG), light-responsive poly(2-nitrobenzyl methacrylate) (PNBM), and temperature-responsive poly(N-isopropylacrylamide) (PNIPAM) arms, PEG(- b -PNBM)- b -PNIPAM, was synthesized via a combination of atom transfer radical polymerization (ATRP) and click reaction. In aqueous solution, the obtained miktoarm star terpolymer self-assembled into spherical micelles with PNBM cores and hybrid PEG/PNIPAM coronas. When heating above the phase transition temperature of PNIPAM, larger aggregates with mixed PNBM/PNIPAM cores and PEG coronas were formed. Upon UV light irradiation, the initial micelles were disrupted and reassembled into some large micelle complexes. Fluorescence emission measurements showed that Nile red encapsulated in the polymeric micelles could be released by stimuli of UV light or temperature change. More interestingly, the UV triggered release could be strengthened in basic conditions but weakened in acidic conditions. The prepared light- and temperature-responsive polymeric micelles may have great potential in applications such as nanocarriers and biotechnology for controlled drug and bioagent delivery.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Kuibao Yu,Hailong Hu,Yuanhang Li,Wenjuan Huang,Yuan Qie,Chao Zhong,Tao Chen,Renjie Li,Tailiang Guo,Fushan Li
Balancing carrier injection via improving hole injection capability plays a key role in high-performance quantum dot light-emitting diodes (QLEDs). Herein, a self-assembled monolayer of carbazole-based derivatives is utilized to construct a dipole functional layer at the interface between the hole transport layer (HTL) and quantum dots (QDs) to facilitate hole injection. Additionally, rational interface engineering significantly reduces the trap-state density because of the highly ordered molecular arrangement. The resultant QLEDs present the promising maximum external quantum efficiency (EQE) of 25.03%, which is remarkably higher than that of the control ones (20.58%). The optimized device shows outstanding stability and a long operation lifetime (T95 lifetime at 1000 cd m−2, 14 695 h) in the air. This simple strategy presents how to increase hole injection by constructing a dipole interface and optimizing molecular arrangement to improve the performance of QLEDs.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Mu Bin,Hao Xiangnan,Luo Xiao,Yang Zhongke,Lu Huanjun,Tian Wei
Light-harvesting is an indispensable process in photosynthesis, and researchers have been exploring various structural scaffolds to create artificial light-harvesting systems. However, achieving high donor/acceptor ratios for efficient energy transfer remains a challenge as excitons need to travel longer diffusion lengths within the donor matrix to reach the acceptor. Here, we report a polymeric supramolecular column-based light-harvesting platform inspired by the natural light-harvesting of purple photosynthetic bacteria to address this issue. The supramolecular column is designed as a discotic columnar liquid crystalline polymer and acts as the donor, with the acceptor intercalated within it. The modular columnar design enables an ultrahigh donor/acceptor ratio of 20000:1 and an antenna effect exceeding 100. Moreover, the spatial confinement within the supramolecular columns facilitates control over the energy transfer process, enabling dynamic full-color tunable emission for information encryption applications with spatiotemporal regulation security.
研究领域:
材料科学
·
光化学
·
纳米技术
·
光电
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2014
·Vol. 24
·期 28
·4549-4555
·
IF 10.439
Fang Pu,Li Wu,Enguo Ju,Xiang Ran,Jinsong Ren,Xiaogang Qu
Artificial light-harvesting antenna materials as potential mimics for photosynthetic systems have attracted intense attention recently. Herein, a new modular approach to construct light-harvesting material, which involves the self-assembly of coordination polymer nanoparticles (CPNs) at room temperature, is presented. Fluorescence resonance energy transfer (FRET) occurs between donor and acceptor molecules encapsulated in the CPNs, and the emission signal of acceptor is amplified significantly. To the best of our knowledge, this is the first example of artificial light-harvesting material generated from biomolecule-based coordination polymer nanoparticles. The modularity of the material makes it convenient to manipulate the system by changing the composite of CPNs and the type and amount of dyes confined, implying it is a general strategy. The material functions not only in fluid medium, but also in the form of solid state, which extends its application areas greatly. Furthermore, photocurrent generation can be realized by the dye-encapsulated CPNs system upon irradiation with visible light, implying the potential usefulness in light-energy conversion and photoelectronic applications. Besides, the creation of FRET system provides a platform to mimic dual-channel logic gate at nanoscale level, which is beneficial to the construction of integrated logic devices with multiple functions.
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Lin Xiang,Xianju Zhou,Yongjie Wang,Li Li,Sha Jiang,Guotao Xiang,Chuan Jing,Jingfang Li,Lu Yao
Near infrared (NIR) light emitting phosphors have attracted more and more attention with the development of science and technology . Herein, we report a series of environmentally-friendly low-cost Fe 3+ -activated ZnGa 2 O 4 phosphors which exhibit intense broadband NIR light emitting. According to density functional theory (DFT) calculations, ZnGa 2 O 4 host possesses an indirect wide bandgap. The emission of the Fe 3+ -doped phosphors demonstrates a wide band spanning from 650 to 850 nm, with the maximum at 720 nm and a full width at half maxima (FWHM) of 70 nm, showing a large overlap with the absorption of phytochromes (PR and PFR). The luminescence intensity remains at 71% when the temperature is raised to 423 K. The phosphors are fabricated into light emitting diodes (LEDs) which produces strong NIR emission with CIE color coordinates of (0.65, 0.31). All these results suggest that ZnGa 2 O 4 :Fe 3+ is a promising NIR luminescent material , which is expected to be a candidate for indoor plant culture LEDs.
研究领域:
材料科学
·
光电子学
·
农业生物技术
·
固体物理
·
无机化学
✓ 已验证
DOI
高影响因子
CHINESE CHEMICAL LETTERS
·
2011
·Vol. 23
·期 1
·29-32
·
IF 0.775
Wen Hui Zhong,Ying Na Cui,Shen Min Li,Ying Ping Jia,Jing Mei Yin
The carbonylation of phenyl bromide catalyzed by Co(OAc) 2 has been investigated with PhCOPh as a sensitizer under visible light in the presence of basic additive. With strong base CH 3 ONa, PhCOOCH 3 is produced in 70% yield with 100% selectivity , the similar results are also obtained with a stronger base (CH 3 ) 3 CONa. However, with another strong base NaOH, the yield of the ester is only 40%. On the other hand, with weak base NaOAc or ( n -C 4 H 9 ) 3 N, phenyl bromide cannot be carbonylated. The results of carbonylation of the six substituted phenyl bromides suggest that the activities of o , m , p -BrC 6 H 4 CH 3 are similar to phenyl bromide, while the activities of o , m , p -BrC 6 H 4 Cl are higher with the high yields (≥93%) of the corresponding chloro-esters. In addition, the relative position of bromine and chlorine or methyl on phenyl ring has little effect on the activity of the carbonylation .
研究领域:
有机化学
·
光催化
·
均相催化
·
反应机理
·
绿色化学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2017
·
IF 6.065
Yi Li,Yanan Li,Shuanglong Ma,Pengfei Wang,Qianlei Hou,Jingjing Han,Sihui Zhan
Ag 2 WO 4 /g-C 3 N 4 composite photocatalyst was synthesized by polymerization of thiourea and ammonia chloride combined with the deposition-precipitation method, which was applied as an efficient visible-light driven photocatalyst for inactivating Escherichia coli ( E. coli ). The physicochemical properties of these photocatalysts were systematically characterized by various techniques such as SEM, TEM, XRD, FT-IR, BET, UV–vis DRS and PL. The synthesized photocatalysts exhibited outstandingly enhanced photocatalytic disinfection efficiency compared with that of pure g-C 3 N 4 and Ag 2 WO 4 under visible light. Furthermore, the optimal mass ratio of the Ag 2 WO 4 to g-C 3 N 4 was 5 wt%, and a number of live bacteria could be completely inactivated with Ag 2 WO 4 (5%)/g-C 3 N 4 (100 μg/mL) after 90 min under visible light irradiation. The high disinfection efficiency is due to the synergetic effect between g-C 3 N 4 and Ag 2 WO 4 , including a good distribution of Ag 2 WO 4 particles on the surface of g-C 3 N 4 and an improved separation rate of photogenerated electron-hole pairs. The enhanced disinfection mechanism was also investigated using photogenerated current densities and electrochemical impedance spectroscopy (EIS). Considering the bulk availability and excellent disinfection activity of Ag 2 WO 4 /g-C 3 N 4 composite, it is a promising solar-driven photocatalyst for cleaning the microbial contaminated water.
研究领域:
环境科学
·
材料科学
·
光催化
·
水处理
·
纳米技术
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2011
·
IF 2.072
Wenzhen Li,Shuguang Lu,Zhaofu Qiu,Kuangfei Lin
The performance of clofibric acid (CA) degradation in Milli-Q water and wastewater treatment plant (WWTP) effluent by solar/TiO2 and solar/ZnO was investigated in summer and winter seasons. The effects of NO3− and HCO3− anions, humic acid (HA), and H2O2 on CA photocatalysis were evaluated. Significant difference in CA degradation in two seasons was observed. Both NO3− and HCO3− anions adversely affected CA degradation, particularly at high HCO3− concentration. CA degradation slightly increased with 0.5 mg L−1 HA in solar/TiO2 in summer, but was significantly inhibited in winter at 20 mg L−1 HA. However, the inhibitive effect of 20 mg L−1 HA on CA removal in solar/ZnO had no remarkable difference in two seasons. The degradation in solar/TiO2/H2O2 was similar to that in solar/TiO2, but was inhibited obviously in solar/ZnO/H2O2. When applying photocatalytic process into WWTP effluent, degradation rates were apparently lower compared to Milli-Q water and temperature caused a great adverse effect on CA elimination.
研究领域:
环境科学
·
光催化
·
水处理
·
高级氧化技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 54
·期 3
·2343-2350
·
IF 2.993
Wang Yaxiong,Liu Ping,Wang Honghang,Zeng Baoqing,Wang Jianghao,Chi Feng
Applying copper nanowires (CuNWs) composite transparent conductive electrode (CTCE) as transparent conductive anode, a flexible organic light-emitting device (OLED) is demonstrated in this paper. Ultralong CuNWs were synthesized by a simple hydrothermal method. The random conductive grid of CuNWs was transferred to the surface of flexible substrates by vacuum filtration method. In order to reduce the surface roughness and improve work function, polymethyl methacrylate (PMMA) solution and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) solution were spin-coated on the surface of CuNW transparent conductive electrode (TCE) in turn. The CuNW/PMMA/PEDOT:PSS CTCE was applied to an OLED, and the experiment shows that the OLED was of high efficiency. On comparing the OLED with PEDOT:PSS TCE, the maximum brightness and maximum current density of the OLED with CuNW/PMMA/PEDOT:PSS CTCE were increased by 104% and 4 times, respectively.
研究领域:
材料科学
·
光电子学
·
纳米技术
·
柔性电子学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）