JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Jianqiang Ye,Buming Chen,Shixing Wang
The zinc electrowinning process demands considerable energy, prompting the quest for energy-efficient solutions to curtail costs. Hence, the development of energy-saving anode materials for zinc hydrometallurgy is an important issue. Herein, multilayered PbO 2 film materials were prepared through thermal decomposition and composite electrodeposition, yielding a new PbO 2 –ZrO 2 electrode featuring ZrO 2 particles as the second phase for energy-saving zinc electrowinning. The introduction of ZrO 2 leads to reduced PbO 2 crystal size, heightened the specific surface area of the electrode, and preferential growth of crystal planes. Electrochemical tests underscore that the PbO 2 –ZrO 2 electrode manifests a reduced charge-transfer resistance ( R ct ) and overpotential alongside a 46.15 % extension in service life compared to the pure PbO 2 electrode. Simulated zinc electrowinning experiment affirms PbO 2 –ZrO 2 electrode has a 3.63 % surge in the current efficiency and a substantial 244.61 kWh/t reduction in energy consumption relative to the traditional Pb–0.6wt%Ag anode. This study provides a strategic framework for designing and developing cost-efficient, cost-effective anode materials, promoting advancements in energy conservation and consumption reduction within zinc electrowinning processes.
研究领域:
材料科学
·
电化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Dezhu Zhang,Li Xin,Yongsheng Xia,Liheng Dai,Kai Qu,Kang Huang,Yiqun Fan,Zhi Xu
The development of high-performance ion exchange membranes to break the trade-off between ion selectivity and conductivity is always a great challenge for the vanadium redox flow battery (VRFB). Herein, a hybrid membrane was successfully prepared via the solution casting method. The UiO-66-SO 3 H was embedded in Nafion matrix, acting as an effective barrier for vanadium ions to realize enhanced ion selectivity. At the same time, besides the intrinsic proton cluster channels in Nafion, two types of additional proton transport channels formed in the membranes, which further improved the conductivity of the membranes. Consequently, the VRFB with an optimized hybrid membrane exhibited enhanced voltage efficiency (VEs: 91.5-78.4%) and outstanding energy efficiency (EEs: 86.0-76.1%) compared with the one with recasting Nafion membrane (rNf) (VEs: 86.9-69.0%, EEs: 80.3-66.0%) at 80–220 mA cm -2 . The efficiency kept stable for 1000 cycles in the long-term cycling tests, and the discharge capacity decay rate of the VRFB with the hybrid membrane is only 0.13% per cycle, which is in obvious contrast to the one with rNf (0.73% per cycle). In addition, the electrolyte utilization rate of the VRFB assembled with the hybrid membrane was much higher than that of the one with rNf.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2021
·
IF 3.712
Yaqian Zhang,Jianming Liu,Yujie Zhang,Haisheng Yang,Yanxia Yu,Qingyun He,Xiaojuan Liang,Yongfu Liu,Weidong Xiang
At present, solid-state laser-driven lighting fabricated with blue laser diode (LD) and phosphor has been greatly developed in high-power lighting applications. The major obstacle is the luminescence saturation threshold of the fluorescence conversion material (YAG:Ce). In this work, we successfully prepared a series of high-quality and robust YAG:Ce single crystals . With high quantum efficiency (QE = 92%), regular crystal structure and high thermal conductivity , the single-crystal has excellent ability to deal with high radiation flux and thermal accumulation generated by high power. Matching the single-crystal with the laser, the luminous efficiency up to 274 lm/W and saturation threshold of 12 W/mm 2 were obtained. In addition, the influence of Ce doping concentration and sample processing conditions on the indicators in laser-driven white lighting was systematically studied. The results are of great significance and are believed to promote the development of solid-state laser-driven lighting.
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
FUEL
·
2017
·
IF 4.601
Yiquan Guo,Yongchun Zhao,Shaolong Wang,Cheng Jiang,Junying Zhang
Fly ash fine particles emitted from flue gas during coal combustion are the primary atmospheric pollutants in China. The purpose of this study was to investigate the characteristics of the zeta potential of fine particle suspensions. The relationship between the zeta potential and the fine particle removal efficiency was also discussed. Batch experiments were conducted to evaluate the zeta potential of fine particle aqueous solutions under various pH, ion concentration, surfactant, polymer, and chemical agglomeration solution conditions. A chemical agglomeration system was designed to simulate the removal process of the fine particles. The test results indicated that the zeta potential absolute value of the solution decreased initially and then increased as the pH increased. As the pH increased from 4 to 12, the zeta potential decreased from Zp = 9.4 mV to Zp = −45.4 mV. The isoelectric point (IEP) was 4.3. Also at the IEP, the highest fine particle removal efficiency of 25.9% was achieved. The zeta potential increased as the metal cation concentration of the solutions increased. The trivalent cation Al 3+ exhibited the best performance, which increased Zp from −32.1 mV to −11.2 mV and produced the highest fine particle removal efficiency of 9.2%. Polymers significantly impacted the zeta potential. As the concentration of kappa-carrageenan (CAR) increased from 0.01% to 5%, the zeta potential increased from −30.1 mV to 12.6 mV. The highest fine particle removal efficiency of 41.8% was acquired at a concentration of 0.5%, which had the lowest zeta potential absolute value of 3.5 mV. It can be inferred that the increase in the zeta potential induced the growth of the energy barrier, which prevented particle agglomeration. The suspension with a lower zeta potential exhibited a better fine particle removal efficiency.
研究领域:
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Zanyun Ying,Han Chen,Zheng He,Yutao Hu,Zhipeng Huang,Jialing Gao,Xinya Wang,Jiexu Ye,Jingkai Zhao,Shihan Zhang,Jianmeng Chen
Microbial electrolysis cell (MEC), a promising technology, is being developed for volatile organic compounds (VOCs) abatement. One of the critical issues to limit its industrial application is the poor electron transfer . In this work, anthraquinone-2,6-disulfonate (AQDS) and flavin mononucleotide (FMN) are dosed to MECs for the chlorobenzene (CB) removal, which are denoted as MEC-AQDS and MEC-FMN, respectively. The MEC performance is significantly promoted due to that RMs lower down the internal resistance. The CB removal efficiency in MEC-AQDS and MEC-FMN are increased by 40% and 20%, respectively, compared with neat MEC. Moreover, EC max and K s of MEC-AQDS are 26% and 75% higher than that of neat MEC, respectively. AQDS is a more suitable RM with 66% and 50% higher in dechlorination efficiency and coulombic efficiency, respectively, compared with FMN. The enhancement of dechlorination process in MEC-AQDS is ascribed to two reasons. The lower resistance accelerates the electron transfer rate during dechlorination; and the enhancing growth of dechlorinating bacterium leads to an abundant excretion of dechlorination enzymes. Additionally, electrochemical analysis and intermediate detection imply that RMs affect the electron transfer pathways but not the degradation mechanism , that is, CB converts into 2-chlorophenol and 3-chlorocatechol successively, then ring-opens and dechlorinates for mineralization .
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2022
·
IF 8.634
Liu Liu,Jianlei Niu,Jian-Yong Wu
This study was to evaluate the application of phase change material nano-emulsions as novel coolants for improving the overall efficiency of liquid-cooled photovoltaic/thermal systems. A self-designed lab-scale photovoltaic/thermal module was constructed with serpentine cooling tube of two different geometries. Two phase change material nano-emulsions with a melting point 29 °C or 38 °C were evaluated at various flow rates and solar irradiance periods on the energy and exergy efficiencies . The total thermal-equivalent energy efficiency was 84.41% on average and 89.23% maximum for the module by employing the nano-emulsion, in comparison to 79.95% and 83.23% in the water-cooled system, while the total exergy efficiency was 10.69% with the nano-emulsion, even lower than that of 11.66% with water. The results also suggested that latent heat release in a narrow temperature range was essential for a better energy performance using the nano-emulsion as a coolant. A relatively low flow rate of the nano-emulsion was usually favorable to the overall energy efficiency in consideration of pump power. Moreover, particle size and thermal properties of the nano-emulsion before and after the operation in the systems showed only marginal differences, indicating the high stability for long-term usage in liquid-cooled photovoltaic/thermal systems with performance enhancement.
研究领域:
能源工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Weicheng Cui,Hongye Bai,Jianpeng Shang,Fagen Wang,Dongbo Xu,Jinrui Ding,Weiqiang Fan,Weidong Shi
Constructing the high-performance photoanode is critical to improve photoelectrochemical (PEC) efficiency, but it is still an inevitable challenge to rationally fabricate the organic-inorganic hybrid-photoanode system. For the first time, we report a novel hybrid-photoanode built from ultrathin NiFe-MOF and TiO 2 by a sacrifice template method. The in-situ etch of NiFe-layered double hydroxide (LDH) on the surface of TiO 2 has been successfully realized in the coordination environment, for creating coordinately unsaturated metal sites on NiFe-MOF. The coordinately unsaturated metal sites could significantly promote the water oxidation kinetic , compared with conventional electrode/electrolyte interface. The photocurrent density of the NiFe-MOF/TiO 2 has reached about 3.35 times of bare TiO 2 at 1.23 V (vs. RHE), and the incident photon to current conversion efficiency (IPCE) value has been improved up to 42% (at 390 nm). The significant augment of the charge injection ( η injection ) of 92.8% and charge separation ( η separation ) efficiency of 37.4% has also been exhibited. Moreover, NiFe-MOF/TiO 2 shows a long-term stability ( < 10% decay) after 4 h of continuous illumination. This work provided a novel and rational strategy about the integration of the inorganic semiconductor and organic MOF , which can provide a new insight into understanding MOF-based catalysts for PEC water splitting.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Zongyi Meng,Zunxian Yang,Yuliang Ye,Zhiwei Zeng,Hongyi Hong,Songwei Ye,Zhiming Cheng,Qianting Lan,Jiaxiang Wang,Ye Chen,Hui Zhang,Yuting Bai,Xudong Jiang,Benfang Liu,Jiajie Hong,Tailiang Guo,Fushan Li,Yongyi Chen,Zhenzhen Weng
Quantum-dot light-emitting diodes (QLED) have become a research trend in the field of new displays due to their low cost, wide color gamut , narrow bandwidth, and characteristics that enable production through the solution-gel method. However, the electrical performance of QLED is consistently constrained by energy losses and imbalanced charge carrier injection. This motivates our focus on exciton recombination and energy losses within the quantum-dot layer to enhance the electrical efficiency of QLED. In this work, we introduce a method using a CdZnS quantum dot (B-QD) interlayer to modulate energy transfer and charge carrier transport in QLED devices employing CdSe quantum dot (G-QD) as the emissive layer . By strategically incorporating a B-QD layer between the G-QD and HTL/ETL, we facilitate energy transfer due to the overlap between the excitation wavelength of B-QD and the absorption wavelength of G-QDs. This leads to enhanced energy injection in QLED devices, resulting in a high current efficiency of 39.54 Cd/A and a peak brightness of 522,272 cd/m 2 for efficient QLED. The corresponding external quantum efficiency (EQE) is greatly improved from 5.62 % to 9.4 %. Our work provides a straightforward and effective approach to modulate exciton recombination and energy injection and further can be applicable to other photo-electronics devices.
研究领域:
材料科学
·
光电技术
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2014
·Vol. 140
·期 2
·407-413
·
IF 3.906
Xiaoqiang Qiao,Yanjun Yang,Shijia Liu,Shiheng Chen,Xin Wang,Guangyue Li,Hongyuan Yan,Xun Yang
In this study, a novel type of pyridinium-based tags, 1-[3-[(2-iodo-1-oxoethyl)amino]propyl]-4-methylpyridinium bromide (IMP) and 1-[3-[(2-iodo-1-oxoethyl)amino]propyl]-4-propylpyridinium bromide (IPP), were designed, synthesized, and applied to the derivatization of thiol-containing peptides. With model peptides as the sample, the labeling efficiency and the stability of the peptide derivatives were investigated. The results indicate that nearly 100% derivatization yield was achieved with the developed tags and the peptide derivatives were stable at room temperature for at least one week. Furthermore, improved ionization efficiency and increased charge states were achieved via both matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MS) and electrospray ionization (ESI) MS, of which IPP exhibited the more obvious improvement of ionization efficiency. Further analysis of tryptic digests of bovine serum albumin (BSA) and α-transferrin, showed that increased identification efficiency of the thiol-containing peptides was achieved by combination with IMP or IPP derivatization. For example, the identification efficiency of the thiol-containing peptides of α-transferrin increased more than 42% upon combination with the IMP or IPP derivatives. We anticipate the novel tags are promising for highly efficient thiol-containing peptide identification in proteome research, especially for low concentrations.
研究领域:
生物化学
·
蛋白质组学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
Laser & Photonics Reviews
·
2023
·Vol. 17
·期 8
·2300371
·
IF 11
Haotao Li,Shiming Zhou,Shuming Chen
Top-emitting (TE) quantum-dot light-emitting diodes (QLEDs) can exhibit higher light outcoupling efficiency (OCE) compared to bottom-emitting (BE) QLEDs due to the eliminated substrate mode and enhanced microcavity effect. In this study, TE QLEDs with an OCE of over 45% are realized by simultaneously optimizing the thicknesses of both indium-zinc-oxide (IZO) phase tuning layers and IZO top transparent electrodes. To reduce the resistance, the IZO top electrodes are equipped with an auxiliary metal electrode. Consequently, the red QLEDs demonstrate a high external quantum efficiency (EQE) of 38.2%. Furthermore, by applying a scattering layer on the IZO top electrode, the red QLEDs demonstrate record-breaking efficiencies of EQE 44.5%, power efficiency 92.2 lm W −1 , and current efficiency 93.7 cd A −1 . The proposed device architecture and optimization strategy contribute to a new design scheme for the preparation of highly efficient QLEDs for displays and lighting applications.
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
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Cong Zhao,Shuyang Bao,Qianxiong Wen,Li Xu,Luhan Wang,Xidong Wang,Xiangjia Sun,Xiaojuan Liang,Le Zhang,Weidong Xiang
To withstand higher power density (PD), exhibit higher luminous efficiency (LE), use in smaller size and lower cost has become the direction of solid-state lighting technology. In the face of high-density laser irradiation and strong thermal shock , improving the performance of color conversion materials related to laser illumination has become a research hotspot. In this study, The Y 3 Al 5 O 12 :Ce 3+ phosphor-in-glass film (Ce:YAG-PiF) was obtained by scraping method. The optimized Ce: YAG-PiF external quantum efficiency (EQE) reaches 74.7%, closing to the phosphor (EQE = 78.47%). Excitingly, at 573 K, the thermal conductivity of sample remains at 9.47 W m −1 K −1 . Besides, the sample has an ultra-high LE of 256 lm/W @ 32.47 W/mm 2 . After recombining with the red phosphor CaAlSiN 3 :Eu 2+ (CASN), the color rendering index (CRI) is 84.6, the correlation color temperature (CCT) is 5594 K, and the LE is 192.91 lm/W @ 39.87 W/mm 2 . More importantly, the relative intensity of laser module packaged by Ce:YAG & CASN-PiF decreased by 15% when tested at 4 W for 24 h. Besides, the packaged laser flashlight has good collimation within a visible illuminance. All the results show that the prepared sample can maintain high emission intensity at high laser PD and have a good heat resistance, which is a promising color conversion material in the field of solid-state laser illumination.
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 LUMINESCENCE
·
2023
·
IF 3.6
Jianlin Zhang,Weiren Zhao,Yang Li,Jiyou Zhong
Near-infrared (NIR) spectroscopy based on phosphor-converted NIR light-emitting-diode (LED) has extensive applications in modern life, stimulating the exploration of ultra-broadband NIR phosphors with high efficiency. Herein, Cr 3+ -doped perovskite-like Mg 4 Sb 2 O 9 phosphor was synthesized, which exhibits a NIR emission with peak wavelength of 855 nm, and a full width at half maximum (FWHM) of about 207 nm. Upon 442 nm excitation, the quantum efficiency (QY) and absorption efficiency (AE) were determined to be 59.1 % and 48.3 %, respectively; while the luminescence intensity remained 61.5 % of room temperature at 373 K, indicating an excellent efficient and a moderate thermal stability of this material. The fabricated NIR pc-LED through combining the optimized phosphor with a 455 nm LED chip presents an output power of 20.1 mW and a photoelectronic conversion efficiency of 3.6 % under a driving current of 175 mA. These results suggest that Mg 4 Sb 2 O 9 :Cr 3+ phosphor with excellent luminescent performance may have good potential for applications in NIR pc-LEDs.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）