CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Weicheng Cui,Jianpeng Shang,Hongye Bai,Jian Hu,Dongbo Xu,Jinrui Ding,Weiqiang Fan,Weidong Shi
Realizing a highly efficient catalytic activity for photoelectrochemical (PEC) water splitting has been becoming a key challenge for fabricating TiO 2 photoanode, due to its weak light-response ability and poor electrical conductivity. For the first time, we prepared the TiO 2 nanorods decorated with NH 2 -MIL-125 film, and subsequently in-situ implanted Ag nanoparticles (Ag NPs) into NH 2 -MIL-125 film by mild reduction process with the help of amine group. The synergistic effect between NH 2 -MIL-125 and Ag NPs is aimed at efficiently improving light-response and the overall conductivity of photoanode. The PEC performance of as-prepared Ag/NH 2 -MIL-125/TiO 2 hybrid-photoanode has been systemically investigated. The photocurrent density of optimal Ag/NH 2 -MIL-125/TiO 2 has reached 1.06 mA/cm 2 at 1.23 V (vs. RHE) under illumination (100 mW/cm 2 ), which is almost 4.42 times higher than that of pristine TiO 2 . The incident photon-to-electron conversion efficiency (IPCE) value of Ag/NH 2 -MIL-125/TiO 2 has been increased to 51.0% at 390 nm. Furthermore, the desirable charge injection ( η i n j e c t i o n ) of 96.4% and charge separation ( η s e p a r a t i o n ) efficiency of 33.1% have been achieved. The in-situ introduction of Ag NPs into NH 2 -MIL-125/TiO 2 heterostructure provides a novel model for understanding the synergistic effect between metal and MOF over PEC water splitting.
研究领域:
材料科学
·
光化学
·
纳米技术
·
催化
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Shuyang Bao,Yueyuan Liang,Liansheng Wang,Luhan Wang,Li Xu,Yu Wang,Xiaojuan Liang,Weidong Xiang
Solid laser lighting with high photoelectric conversion efficiency and compact size has been increasingly vital in lighting applications. Extensive research has been conducted to obtain high-quality color converters for application to high-power and high-luminance laser lighting. Currently, Y3Al5O12:Ce3+ phosphor in glass (Ce:PiG) and Y3Al5O12:Ce3+ phosphor-in-glass film (Ce:PiF) possessing high efficiency, low cost, easy fabrication, and controllable chromaticity are becoming the most mainstream research directions. In this study, by modifying the glass particle size and sintering temperature, investigating the relevant host glass, and so forth, high-performance Ce:PiG was developed through a one-step co-sintering technology. It possesses a high internal quantum efficiency, approaching 100% of the original phosphors (92.5%). The luminous efficacy (LE) of the Ce:PiG was 240 lm/W at 2.18 W/mm2 under 450 nm blue laser diode (LD) excitation, which is the best result yet reported. Furthermore, to enhance the laser saturation threshold, the fabricated Ce:PiF relying on a sapphire substrate can withstand an 8 W/mm2 blue incident power density. The obtained sample can even reach an LE of 251.5 lm/W, which is an obvious improvement to Ce:PiG. In addition, the result, an LD module combined with the sample that meets the standard white light source, indicates that this work has good prospects for white laser lighting.
研究领域:
光电技术
·
材料科学
·
照明工程
✓ 已验证
产品关联
DOI
高影响因子
Nature Photonics
·
2024
·
IF 32.3
Ding Shuo,Wang Qiangqiang,Gu Wencui,Tang Zhaobing,Zhang Bo,Wu Chunyan,Zhang Xuanyu,Chen Hao,Zhang Xinyu,Cao Rui,Chen Tao,Qian Lei,Xiang Chaoyu
The efficiency and stability issues of perovskite light-emitting diodes, especially at high brightness, need to be urgently solved for displays and lighting applications. Herein we present a simple chemical washing method called solvent sieve to resolve the phase dimension issue of metal halide perovskites. After being sieved, undesirable defect-rich low- n phases are selectively screened out of perovskite multi-quantum-well structures. With better intrinsic structure refinement, the sieved perovskites demonstrated not only a record external quantum efficiency, current efficiency, and T 50 lifetime of 29.5%, 127.4 cd A −1 , and 18.67 h at 12,000 cd m − 2 (the equivalent of over 50,317 h or 5.7 years at 100 cd m − 2 ), respectively, with a maximum luminance of over 147,872.8 cd m − 2 , but also extraordinary resistance to air and moisture, maintaining over 75% of film photoluminescence quantum yield and 80% of device EQE after being stored at ambience for 100 days. The simple solvent sieve treatment we reported here confirms the feasibility of metal halide perovskites for luminescence and unleashes the efficiency and stability potentials of high-brightness perovskite light-emitting diodes for future commercial applications.
研究领域:
材料科学
·
光电子学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry Letters
·
2017
·
IF 9.353
Li Song,Xiaoyang Guo,Yongsheng Hu,Ying Lv,Jie Lin,Zheqin Liu,Yi Fan,Xingyuan Liu
Efficient inorganic perovskite light-emitting diodes (PeLEDs) with an ultrathin perovskite emission layer (∼30 nm) were realized by doping Lewis base polyethylene glycol (PEG) into CsPbBr3 films. PEG in the perovskite films not only physically fills the crystal boundaries but also interacts with the perovskite crystals to passivate the crystal grains, reduce nonradiative recombination, and ensure efficient luminance and high efficiency. As a result, promoted brightness, current efficiency (CE), and external quantum efficiency (EQE) were achieved. The nonradiative decay rate of the PEG:CsPbBr3 composite film is 1 order of magnitude less than that of the neat CsPbBr3 film. After further optimization of the molar ratio between CsBr and PbBr2, a peak CE of 19 cd/A, a maximum EQE of 5.34%, and a maximum brightness of 36600 cd/m2 were achieved, demonstrating the interaction between PEG and the precursors. The results are expected to offer some helpful implications in optimizing the polymer-assisted PeLEDs with ultrathin emission layers, which might have potential application in see-through displays.
研究领域:
材料科学
·
光电子学
·
纳米技术
·
固体物理
·
高分子化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Jiasheng Li,Yong Tang,Zongtao Li,Xinrui Ding,Binhai Yu,Liwei Lin
Quantum-dot (QD) white light-emitting diodes (LEDs) are promising for illumination and display applications due to their excellent color quality. Although they have a high quantum yield close to unity, the reabsorption of QD light leads to high conversion loss, significantly reducing the luminous efficacy and stability of QD white LEDs. In this report, SBA-15 mesoporous particles (MPs) with two-dimensional hexagonal pore structures (2D-HPS) are utilized to largely enhance the luminous efficacy and color-conversion efficiency of QD white LEDs in excess of 50%. The reduction in conversion loss also helps QD white LEDs to achieve a lifetime 1.9 times longer than that of LEDs using QD-only composites at harsh aging conditions. Simulation and testing results suggest that the waveguide effect of 2D-HPS helps in reducing the reabsorption loss by constraining the QD light inside the wall of 2D-HPS, decreasing the probability of being captured by QDs inside the hole of 2D-HPS. As such, materials and mechanisms like SBA-15 MPs with 2D-HPS could provide a new path to improve the photon management of QD light, comprehensively enhancing the performances of QD white LEDs.
研究领域:
材料科学
·
光学工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 30
·期 45
·2004783
·
IF 16.836
Dongli Wang,Jie Song,Jing Wang,Zhiyi Zhang,Qing Shen,Jun Wang,Haiyan Guo,Ruifeng Wang,Cao Xie,Weiyue Lu,Min Liu
Low transfection efficacy of non-viral gene vectors restricts their applications. In this paper, N 1 ,N 3 -dicarbamimidoyl-5-methylisophthalamide (BGG) is designed as a functional group, in which two guanidyls are located at the meta positions of an aryl ring. BGG is conjugated with PAMAM G5 (G5-BGG) and G5-BGG/DNA complex is dispersed into a polyvinyl alcohol (PVA) hydrogel for local injection. Molecular docking, NMR, IR and Isothermal titration calorimetry (ITC) experiments demonstrate that G5-BGG has multiple molecular interactions with nucleic acids, which yield high binding affinity toward nucleic acids. Interestingly, the in vitro transfection efficiency and serum stability of G5-BGG are significantly improved when the BGG modification ratio is just one. The integrated G5-BGG/DNA complex is released from a PVA hydrogel sustainably, crosses the cell membrane and escapes from endosome/lysosome. After local injection only once, these features of the G5-BGG/DNA-loaded PVA hydrogel are found to improve antitumor efficiency in vivo, and antitumor efficiency is significantly better than PEI 25K. The results confirm that BGG is a potential group for developing non-viral gene vectors with high transfection efficacy.
研究领域:
遗传学
·
药学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 6
·3053-3059
·
IF 7.233
Long Zhou,Jingjing Chang,Ziye Liu,Xu Sun,Zhenhua Lin,Dazheng Chen,Chunfu Zhang,Jincheng Zhang,Yue Hao
Perovskite/PCBM heterojunctions are efficient for fabricating perovskite solar cells with high performance and long-term stability. In this study, an efficient perovskite/PCBM heterojunction was formed via conventional sequential deposition and one-step formation processes. Compared with conventional deposition, the one-step process was more facile, and produced a perovskite thin film of substantially improved quality due to fullerene passivation. Moreover, the resulting perovskite/PCBM heterojunction exhibited more efficient carrier transfer and extraction, and reduced carrier recombination. The perovskite solar cell device based on one-step perovskite/PCBM heterojunction formation exhibited a higher maximum PCE of 17.8% compared with that from the conventional method (13.7%). The device also showed exceptional stability, retaining 83% of initial PCE after 60 days of storage under ambient conditions.
研究领域:
材料科学
·
光伏技术
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yuhua Xie,Xinxin Yu,Xianwei Li,Xue Long,Chaofeng Chang,Zehui Yang
The industrialization of solid polymer electrolyte water electrolysis (SPEWE) dominantly relies on electrocatalyst with high stability and efficiency for oxygen evolution reaction (OER) catalysis. In this work, we report a facile method to construct α-Ni(OH) 2 @Ir core–shell nanoparticles as bifunctional electrocatalyst for acidic overall water splitting application. α-Ni(OH) 2 @Ir requires lower overpotentials (238 mV and 20 mV) to achieve 10 mA cm −2 in acidic OER and HER catalysis compared to benchmarked IrO 2 (332 mV) and Pt/C (36 mV); meanwhile, the OER mass activity at 1.55 V vs. RHE was 92 fold higher than IrO 2 ; HER mass activity at overpotential of 80 mV was 5 fold better than Pt/C. The boosted catalytic activity is due to the enhanced utilization efficiency of Ir stemmed from the ultrathin Ir shell (~1 nm). Moreover, 1.49 V is demanded for α-Ni(OH) 2 @Ir to attain 10 mA cm −2 in acidic overall water splitting, 110 mV lower than benchmarked Pt/C-IrO 2 system. Meanwhile, stable catalytic performance is recorded for 20 h.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
KEY ENGINEERING MATERIALS
·
2018
·
IF 0
Xiao Dong Tan,Wei Xiong,Jin Zhang,Jie Xu,Chang Hai Yi
The method of electrochemical reduction utilizes electrons as agent to achieve the reduction of indigo, vat dyes and pollution emissions, as well as the recycling of electrolyte. In this study, Ca2+-Fe3+-triethanolamine (TEA) redox system was used as the mediator to achieve the indirect electrochemical reduction of indigo. The optimization of parameter was analyzed by reduction efficiency (RE) and current efficiency (CE). The result showed that indigo could be reduced by electrochemical method and the best optimization recipe was 20 g/L NaOH + 5 g/L Fe2(SO4)3 + 30 g/L TEA + 5 g/L Calcium gluconate + 3 g/L indigo in 1 A·dm-2 current density at 50°C. This work suggested that Ca2+-Fe3+-TEA redox system in reduction of indigo was an effective way with higher CE (75.9 %).
研究领域:
化学工程
·
环境科学
·
纺织科学
✓ 已验证
产品关联
DOI
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Xidong Wang,Li Xu,Luhan Wang,Shuyang Bao,Yu Wang,Qianxiong Wen,Yanrong Liang,Zhaopin Chen,Xiaoli Fang,Weidong Xiang
As an inorganic color conversion material, phosphor-in-glass film (PiF) has received extensive attention in the sphere of laser-driven white lighting due to its excellent integrated performance. The yellow-emitting phosphor La 3 Si 6 N 11 :Ce has excellent thermal stability and wide emission band, which makes it more competitive than Y 3 Al 5 O 12 :Ce in laser-driven white lighting. Herein, we embedded La 3 Si 6 N 11 :Ce phosphor powder in a silicate glass matrix (SiO 2 –B 2 O 3 –CaO–Na 2 O) and sintered it on a sapphire substrate. In the silica-rich glass system, the network structure of silica-oxygen tetrahedral glass is more rigid and the thermal erosion of the phosphor by the silica-based glass is less, which makes the phosphor maintain better performance after low-temperature co-sintering. The quantum efficiency in the optimized LSN phosphor-in-glass film (LSN PiF) is up to 81 %, and the thermal conductivity is 10.2 Wm −1 K −1 , showing good thermal stability. Impressively, the LSN PiF produces a bright near-white light (0.3323,0.346) at a blue laser of 5.6 W, with corresponding luminous efficiency up to 195 lm/W. Moreover, LSN PiF can maintain about 80 % of the initial luminous intensity after continuous lighting for 24 h at the incident power of 3.5 W. These outstanding properties can advance the development of LSN phosphors in high power laser lighting applications.
研究领域:
材料科学
·
光学
·
光子学
·
照明技术
✓ 已验证
产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2021
·
IF 8.001
Wei Zhang,Zhenlin Li,Canying Zhang,Yusheng Lin,Haitao Zhu,Zhaoguo Meng,Daxiong Wu
Volumetric solar steam generation has attracted substantial interest due to its low cost, minimum carbon footprint and wide application in many areas including clean water production, desalination , and wastewater treatment . However, the efficiency of volumetric solar evaporation is still low and there is an urgent need to investigate the fundamental of the limitation of low efficiency and find a new strategy to improve the solar evaporation efficiency. In the current work, antimony doped tin oxide@carbon (ATO@C) nanofluids were prepared by a hydrothermal approach. The ATO@C nanofluids exhibit broad-band and high absorption in the solar spectrum due to the complementary effect of C (in visible region) and ATO (in the near infrared region). ATO@C nanofluids of 0.3 wt% could harvest 99.9% of the incident solar energy within 1 cm penetration distance. The photothermal conversion efficiency is 97.8%. The coupling relationship between the solar harvesting and the energy distribution was revealed. Increasing mass fraction and reducing thickness can localize the heat in the surface layer of nanofluids and thus minimize the energy consumption in heating water (internal energy) and therefore improve the solar evaporation efficiency. A high evaporation efficiency of 88.6% was achieved in this way.
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yuxuan Zhao,Hang Hua,Shilei Wei,Jingshan Luo
In membrane electrode assembly (MEA) electrolyzers for the electrochemical CO2 reduction reaction (CO2RR) using alkaline or neutral electrolytes, anion exchange membranes (AEMs) play a critical role in determining mass transfer, energy efficiency, and stability within the reaction system. In this study, we compared commercial AEMs from three brands─Piperion, Sustainion, and Fumasep─to identify the membrane that offers the best CO2RR performance. The primary differences in the effects of AEMs on the CO2RR are reflected in energy efficiency, Faradaic efficiency of products, and device stability. Among all the AEMs, Fumasep 3–50 provides the highest energy efficiency, attributed to the excellent conductivity of the organic monomers composing it. Meanwhile, Piperion A20 and Sustainion X-37 grade RT demonstrate superior Faradaic efficiency and cation barrier properties, thereby enabling long-term CO2RR operation. This work screens available commercial AEMs for CO2 electrolysis and identifies the essential parameters for the CO2RR, providing valuable insights for the electrochemical CO2 reduction field.
研究领域:
电化学
·
能源材料
·
环境科学
·
催化化学
·
膜科学
·
可持续能源技术
·
碳捕集与利用
·
电催化
✓ 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）