COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Xianyu Liu,Jing Li,Yingchun Xiao,Xiangcheng Dong,Lei Tao,Zhiyuan Liu,Zheng Liu,Jia Zhang,Shengjie Xu
The Li metal anode is regarded as the most potential electrode material in the next-generation energy storage system, because of the high energy density and specific capacity. However, the advancement of Li metal anode is restricted by the volume changing and dendrite growth. In this paper, the Co and Zn co-doped porous carbon framework (CF-CZ) derived from MOF structure was designed and produced to realize the dendrite-free Li metal anode. The porous structure could accommodate the deposited Li metal, which relaxes the pressure of electrode structure and relieves the volume changes. Meanwhile, the Co, Zn co-doping effectively improves the lithiophilicity of framework, which attracts Li + and decreases the nucleation barrier. Besides, numerous micropores of MOF structure could divide the Li + flux to reduce the local current density for dense sedimentation. With the synergies of co-doping and porous structure, the symmetric cell of CF-CZ shows better electrochemical performance (the overvoltage can be stable at 14 mV after 1200 cycles) than pure Cu foil, and the LFP cells deliver 116.4 mAh g −1 at 1 C after 200 cycles. As a consequence, the CF-CZ possesses the potential to be applied in Li metal anodes.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Zhengyan Hao,Yong Xu,Xijia Yang,Xuesong Li,Yang Gao,Liying Wang,Wei Lü
Zinc-ion hybrid supercapacitors (ZIHSCs) are emerging as a promising energy storage device, combining the benefits of traditional batteries and capacitors, including high energy density, incredible power density, a wide voltage window, and excellent capacity retention. In this study, a Cu²⁺ and Zn²⁺ co-doped needle-like tunnel-structured α-MnO₂ material is proposed as the cathode (Cu-Zn-MnO₂@CC), which is grown on an acid-treated flexible carbon cloth substrate using a simple hydrothermal synthesis method. Along with an anode made of super-mesoporous activated carbon derived from waste rice husks (ACrh@CC). The synergistic effect of the co-doping stabilizes the nanowire tunnel structure and provides more active sites. As a result, the Cu-Zn-MnO₂@CC//2 M ZnSO₄//ACrh@CC ZIHSC achieves an ultrahigh specific capacitance of 1241.85 mF cm⁻² at 1 mA cm⁻², representing an improvement of more than 50 % in performance compared to with conventional MnO₂@CC ZIHSC. And a maximum areal energy density of 689.9 μWh cm⁻² at a power density of 1 mW cm⁻². After 20,000 cycles, it retains 86.35 % of its initial capacitance. Furthermore, the assembled flexible device achieves a specific capacitance of 1070.21 mF cm⁻² at 1 mA cm⁻². This device can provide long-term power for electronic devices such as digital watches and timers. The study offers crucial understanding regarding structure of ZIHSC electrode materials and opens up possibilities for their potential applications.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Kai Lv,Xu Liang,Qinglin Yao,Liangmiao Zhang,Zongtao Zhang,Yanfeng Gao
This work reports a series of yellow-green near-infrared (NIR) reflective pigments, Ba(Mg 6-x-y Zn y Ti 6-x Cr 2x )O 19 (x = 0–1.0, y = 0–2.5), with strong NIR reflectivity for solar thermal energy regulation. Comprehensive analyses were carried out to characterize the obtained pigments including X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, UV–Vis–NIR spectrophotometry, and CIE L*a*b* color measurement. Absorption spectra of Ba(Mg 6-x Ti 6-x Cr 2x )O 19 showed that the yellow-green absorption is attributed to the octahedrally coordinated Cr 3+ with d-d electron transitions of 4 A 2 (F)→ 4 T 1 (F) and 4 A 2 (F)→ 4 T 2 (F). However, their broad absorption peak centered at 1200 nm severely deteriorated the insulating properties of the pigments. Through substituting Mg with Zn, the obtained pigment Ba(Mg 2.5 Zn 2.5 Ti 5 Cr 2 )O 19 showed an excellent NIR solar reflectance (R* = 67 %) with color performances (L* = 61.98, a* = −18.72, b* = 22.23). EnergyPlus simulation results show that for a warm city (Haikou), the Ba(Mg 2.5 Zn 2.5 Ti 5 Cr 2 )O 19 coating for the external surface of a model house (TSR = 35 %, R* = 55 %) can reduce annual cooling energy consumption by 8 % of the house.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2024
·
IF 6.2
Tianrui Xu,Guanghui Wang,Qiuling Yin,Zhongkui Zhou,Nansheng Deng
In this study, a novel sulfur/zinc co-doped biochar (SZ-BC) stabilizer was successfully developed for the remediation of mercury-contaminated soil. Results from SEM, TEM, FTIR and XRD revealed that biochar (BC) was successfully modified by sulfur and zinc. In the batch adsorption experiments, the sulfur-zinc co-pyrolysis biochar displayed excellent Hg(II) adsorption performance, with the maximum adsorption capacity of SZ-BC (261.074 mg/g) being approximately 16.5 times that of BC (15.855 mg/g). Laboratory-scale static incubation, column leaching, and plant pot experiments were conducted using biochar-based materials. At an additional dosage of 5 % mass ratio, the SZ-BC exhibits the most effective stabilization of mercury in soil, leading to a significant reduction in leaching loss compared to the control group (CK) by 51.30 %. Following 4 weeks of incubation and 2 weeks of leaching with SZ-BC, the residual mercury in the soil increased by 27.84 %. As a result, potential ecological risk index of mercury decreased by 92 % compared to the CK group. In the pot experiment, SZ-BC significantly enhanced the growth of Chinese cabbage, with biomass and root dry weight reaching 3.20 and 2.80 times that of the CK group, respectively. Additionally, the Translocation Factor (TF) and Bioconcentration Factor (BF) were reduced by 44.86 % and 74.43 %, respectively, in the SZ-BC group compared to the CK group. Moreover, SZ-BC can effectively improve enzyme activities and increase microbial communities in mercury-contaminated soils. The mechanisms of adsorption and stabilization were elucidated through electrostatic adsorption, ion exchange, surface complexation, and precipitation. These findings provide a potentially effective material for stabilizing soils contaminated with mercury.
研究领域:
环境科学
·
土壤修复
·
生态学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2020
·Vol. 8
·期 22
·2001037
·
IF 8.286
Dongjie Liu,Xiaohan Yun,Guogang Li,Peipei Dang,Maxim S. Molokeev,Hongzhou Lian,Mengmeng Shang,Jun Lin
Highly efficient cyan-emitting phosphor materials are indispensable for closing the cyan gap in spectra of the traditional phosphor-converted white light-emitting diodes (WLEDs) to achieve high-quality full-spectrum white lighting. In this work, bright cyan-emitting Ca 3 Ga 4 O 9 (CGO):0.02Bi 3+ ,0.07Zn 2+ phosphor is developed to bridge the cyan gap. Such a Bi 3+ ,Zn 2+ codoping enhances the cyan emission of CGO:0.02Bi 3+ by 4.1 times due to the influence of morphology and size of phosphor particles, charge compensation and lattice distortion. Interestingly, codoping La 3+ ions into the current system can achieve a photoluminescence tuning of CGO:0.02Bi 3+ from cyan to yellowish-green by crystallographic site engineering. Besides, Bi 3+ –Eu 3+ energy transfer is successfully realized in CGO:0.02Bi 3+ ,0.07Zn 2+ , n Eu 3+ phosphors and the emission color tuning from cyan to orange is observed. The investigation of thermal quenching behaviors reveals that the incorporation of Zn 2+ and La 3+ improves the thermal stability of CGO:0.02Bi 3+ . Finally, CGO:0.02Bi 3+ ,0.07Zn 2+ ,0.10Eu 3+ phosphor is employed to obtain a single-phased warm WLED device. A full-spectrum WLED device with remarkable color rendering index (Ra) of 97.4 and high luminous efficiency of 69.72 lm W −1 is generated by utilizing CGO:0.02Bi 3+ ,0.07Zn 2+ phosphor. This result suggests the important effect of CGO:0.02Bi 3+ ,0.07Zn 2+ phosphor on closing the cyan gap, providing new insights of cyan-emitting phosphors applied in full-spectrum white lighting.
研究领域:
材料科学
·
光学工程
·
固体物理
·
无机化学
·
光电子学
·
照明技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Mingyang Gao,Huijun Li,Zhenxin Zhao,Xiaomin Wang
The P2-layered metal oxide cathode materials are crucial for constructing high-rate sodium-ion batteries (SIBs); however, its practical application is hindered by the high Na+ diffusion barrier resulting from Na+/vacancy ordering. Herein, a Li/Zn cosubstitution P2–Na0.67Ni0.33Mn0.67O2 (NLNZM) cathode was synthesized via a sol–gel method assisted with citric acid, which can induce the rearrangement of Na+ sites to disrupt ordered structures. The XRD Rietveld refinement confirms a higher occupancy of Na+ at Nae sites with low diffusion barriers through the Li/Zn cosubstitution. In addition, the highly reversible phase evolution of the NLNZM is confirmed through in situ XRD results, thereby ensuring the stability of the structure with low volume change rate (0.78%). Furthermore, Li and Zn can reduce the surface energy and increase the interlayered distance to achieve rapid interfacial kinetics. As a result, the NLNZM has exhibited a high reversible capacity of 152.8 mAh g–1 and an outstanding rate performance of 103.4 mAh g–1 at 5C. After 200 cycles at 5C, the capacity retention rate is 81.1%. This work proposes a cosubstitution strategy to induce Na+/vacancy disorder for achieving rapid Na+ migration as a cathode material for SIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Shaorui Jia,Junhong Ma,Xinbo Zhang,Chaoyun Ma,Xue Yu,Zhaohui Chen,Xudong Wang,Guirong Zhang
Photothermal catalytic CO 2 hydrogenation via the reverse water–gas shift (RWGS) reaction enables sustainable CO production under mild conditions. However, the advancement of this promising technology is critically dependent on the development of high-performance catalysts, which continues to pose a key challenge in the field. Herein, a series of Cu x Zn 1-x Co 2 O 4 spinel catalysts with full solar spectrum absorption were synthesized via co-precipitation to synergize photothermal energy for efficient CO 2 conversion. The Cu/Zn co-doping strategy not only enhanced light absorption but also introduced abundant oxygen vacancies, fostering the formation of frustrated Lewis pairs (FLPs) that destabilize CO 2 ′s linear configuration and weaken C=O bonds. The optimized Cu 0.5 Zn 0.5 Co 2 O 4 catalyst demonstrated exceptional performance, achieving a CO 2 conversion rate of 418.7 mmol·g cat −1 ·h −1 with 93.1 % CO selectivity at 350 °C under light irradiation, alongside stable operation for more than 10 hours. The experimental characterization combined with theoretical calculation reveal that Cu 0.5 Zn 0.5 Co 2 O 4 possesses abundant oxygen vacancies, predominantly localized at the Zn tetrahedral sites. These structural defects play a crucial role in generating more active FLP sites, which in turn leads to significantly improved CO 2 activation efficiency. In-situ diffuse reflectance infrared Fourier transform spectroscopy ( in-situ DRIFTS) investigation elucidates key intermediates and the catalytic mechanism. This work provides a strategy for designing efficient non-precious metal photothermal catalysts through bimetallic doping and defect engineering to enhance CO 2 utilization.
✓ 已验证
DOI
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-13
·
IF 17.694
Li Siwu,Zhu Haolin,Liu Yuan,Han Zhilong,Peng Linfeng,Li Shuping,Yu Chuang,Cheng Shijie,Xie Jia
Potassium metal is an appealing alternative to lithium as an alkali metal anode for future electrochemical energy storage systems. However, the use of potassium metal is hindered by the growth of unfavourable deposition (e.g., dendrites) and volume changes upon cycling. To circumvent these issues, we propose the synthesis and application of nitrogen and zinc codoped porous carbon nanofibres that act as potassium metal hosts. This carbonaceous porous material enables rapid potassium infusion (e.g., < 1 s cm −2 ) with a high potassium content (e.g., 97 wt. %) and low potassium nucleation overpotential (e.g., 15 mV at 0.5 mA cm −2 ). Experimental and theoretical measurements and analyses demonstrate that the carbon nanofibres induce uniform potassium deposition within its porous network and facilitate a dendrite-free morphology during asymmetric and symmetric cell cycling. Interestingly, when the potassium-infused carbon material is tested as an active negative electrode material in combination with a sulfur-based positive electrode and a nonaqueous electrolyte solution in the coin cell configuration, an average discharge voltage of approximately 1.6 V and a discharge capacity of approximately 470 mA h g −1 after 600 cycles at 500 mA g −1 and 25 °C are achieved.
研究领域:
材料科学
·
电化学
·
能量存储
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yifan Cui,Dezhi Yang,Qiulan Li,Zhongmei Peng,Zitao Zhong,Yuzhu Song,Qinqin Han,Yaling Yang
Nanozyme-mediated antioxidative therapy is a promising star for treating a myriad of important diseases through eliminating excessive reactive oxygen species (ROS) such as O2·– and H2O2, a critical mechanism for inflammatory bowel disease (IBD). This work provides a high biocompatibility iodine–copper–zinc covalent doped carbon dots (Cu,Zn,I-CDs) with the catalase (CAT)-, superoxide dismutase (SOD)- and glutathione peroxidase (GPx)-like catalytic activities for treating ulcerative colitis (UC) by scavenging overproduced ROS. We found that I dopant aids in counteracting the positive charge at Cu,Zn dopants brought on by low pH, enabling Cu,Zn,I-CDs to process strong triple antioxidant nanozyme activities rather than Cu,Zn-CDs. Vitro experiments displayed that the Cu,Zn,I-CDs could scavenge the excessive ROS to protect cellular against oxidative stress and reduce the expression of proinflammatory cytokines, such as TNF-α, IL-1β, and IL-6. In sodium dextran sulfate (DSS)-induced colitis mice models, Cu,Zn,I-CDs with excellent biocompatibility could effectively relieve the inflammation of the colon, containing the reduction of the colon length, the damaged epithelium, the infiltration of inflammatory cells, and upregulation of antioxidant genes. Therefore, the therapy of Cu,Zn,I-CD antioxidant nanozymes is an effective approach and provides a novel strategy for UC treatment.
研究领域:
纳米技术
·
药学
·
医学研究
·
生物化学
·
材料科学
✓ 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）