Materials Today Energy
·
2022
·
IF 9.257
Ye Chen,Yaling Zhao,Ziwei Zhao,Yang Liu
Ammonia is a promising new generation of green energy that has the potential to replace hydrogen energy and facilitate the energy structure optimization of human society. However, the technology of green ammonia production under ambient conditions is still immature. It is urgent to develop new strategies for efficient and green ammonia production adapted to distributed energy, resource environment, and human health. Hereon, a highly dispersed face-centered cubic copper–cobalt alloy was prepared by ultrafast carbothermal shock for green ammonia production from nitrate under ambient conditions. The Cu 2.5 Co alloy achieves a remarkable ammonia yield of 164.23 μmol/h/cm 2 and an exceptional faradaic efficiency of 96.29% at −0.25 V and −0.05 V versus reversible hydrogen electrode in a neutral solution. The electronic regulation of Co on Cu reduces the Tafel slope from 182 mV/dec of monometallic Cu to 108 mV/dec of bimetal Cu 2.5 Co alloy; the addition of Co optimizes the overall catalytic activity of the catalyst. This work provides a new idea for the design and synthesis of high-efficiency electrocatalyst for green ammonia production from nitrate and water under ambient conditions.
研究领域:
材料科学
·
电催化
·
绿色能源
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 21
·7267
·
IF 4.6
Xinyu Dong,Haifeng Wang,Jiawei Wang,Qian Wang,Hao Wang,Wenhao Hao,Fanghai Lu
Sodium-ion batteries have important application prospects in large-scale energy storage due to their advantages, such as safety, affordability, and abundant resources. Prussian blue analogs (PBAs) have a stable and open framework structure, making them a very promising cathode material. However, high-performance manganese-based Prussian blue cathode materials for sodium-ion batteries still suffer from significant challenges due to several key issues, such as a high number of vacancy defects and a high crystal water content. This article investigates the effects of the Fe-Mn molar ratio, Mn ion concentration, and reaction time on the electrochemical performance of MnHCF during the coprecipitation process. When Fe:Mn = 1:2, c(Mn2+) = 0.02 mol/L, and the reaction time is 12 h, the content of interstitial water molecules in the sample is low, and the Fe(CN)6defects are few. At 0.1 C, the prepared electrode has a high initial discharge specific capacity (121.9 mAh g−1), and after 100 cycles at 0.2 C, the capacity retention rate is 65% (~76.2 mAh g−1). Meanwhile, the sample electrode exhibits excellent reversibility. The discharge capacity can still be maintained at around 75% when the magnification is restored from 5 C to 0.1 C. The improvement in performance is mainly attributed to two aspects: On the one hand, reducing the Fe(CN)6defects and crystal water content is conducive to the diffusion and stable structure of N. On the other hand, reducing the reaction rate can significantly delay the crystallization of materials and optimize the nucleation process.Keywords:Prussian blue analogs;sodium-ion battery;cathode materials;electrochemical performances
研究领域:
材料科学
·
能源存储
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产品关联
DOI
PubMed
高影响因子
Nano Research
·
2023
·Vol. 16
·期 7
·10026-10033
·
IF 9.9
Jiang Shihui,Ke Jianxi,Li Guowei,Liu Aijun,Li Xiaohan,Ye Lixiang,Jiang Feilong,Liu Yongsheng,Hong Maochun
Hexagonal-phase NaYF 4 (β-NaYF 4 ) has been acknowledged to be one of the most efficient doping hosts to prepare bright lanthanide-doped luminescent nano-bioprobes for various biomedical applications. However, to date, it remains a great challenge to synthesize ultra-bright lanthanide-doped β-NaYF 4 nano-bioprobes under a low reaction temperature by using conventional synthetic methods. Herein, we first develop an acetic acid (HAc)-mediated coprecipitation method for the preparation of ultra-bright lanthanide-doped β-NaYF 4 nanoprobes under a low reaction temperature at 200 °C. Based on a series of comparative spectroscopic investigations, we show that the use of HAc in the reaction environment can not only promote the rapid α–β phase transformation of NaYF 4 host at 200 °C within 1 h but also boost the absolute photoluminescence quantum yield (PLQY) of NaYF 4 nanocrystals to 30.68% for near-infrared emission and to 3.79% for upconversion luminescence, both of which are amongst the highest values for diverse lanthanide-doped luminescent nanocrystals ever reported. By virtue of their superior near-infrared luminescence, we achieve optical-guided dynamic vasculature imaging in vivo of the whole body at a high spatial resolution (23.8 µm) under 980 nm excitation, indicating its potential for the diagnosis and treatment evaluation of vasculature-related diseases.
研究领域:
材料科学
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生物医学工程
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL BIOCHEMISTRY
·
2023
·
IF 2.9
Xuhuai Fu,Yunyao Lu,Yang Peng
Ultrasensitive detection of circulating tumor cells (CTCs) holds significant clinical importance in monitoring metastasis and therapeutic outcomes. In this study, we have developed a novel electrochemical sensing model based on nanomaterials for highly sensitive and specific determination of CTCs. A gold electrode co-modified with Ketjin black (KB) and Au nanoparticles (AuNPs) exhibits exceptional conductivity. By conjugating palladium-iridium cubic nanozyme (Pd–Ir CNE) with antibodies, we have created a detection probe capable of catalyzing hydrogen peroxide (H 2 O 2 ), thereby amplifying the output signal and resulting in significantly enhanced current on the electrode for detecting CTCs. The constructed immunosensor has achieved a detection limit of 2 cell mL −1 for model MCF-7 cells. Furthermore, the as-constructed electrochemical immunosensor can accurately detect whole blood-spiked target CTCs, showing great promise for clinical applications in early cancer diagnosis and prognosis.
研究领域:
医学诊断
·
生物材料学
·
肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Photonics
·
2024
·
IF 6.5
Wenxia Wu,Yazhao Wang,Limin Wu,Huiting Zhang,Zhonghua Zhu,Shengdi Ta,Peng Zhang,Shoulei Xu,Bernard A. Goodman,Wen Deng
Under excitation at 980 nm, Tm3+ may emit ultraviolet, blue, and red light, and Ho3+ may emit green light through multiphoton upconversion processes in Yb/Tm/Ho codoped materials. However, because the probability of the electron population of the higher excited state energy levels is much lower than that of the lower ones in multiphoton upconversion processes, it is difficult to observe the ultraviolet emission of Tm3+-doped single crystals under excitation at 980 nm. Here, we report that high-quality single crystals of cubic ZrO2 codoped with Tm2O3, Ho2O3, and Yb2O3 are successfully grown by the optical floating zone method, and ultraviolet emission at 308 nm was observed for the first time from multiphoton upconversion transitions in these highly transparent, low phonon energy single crystals under excitation at 980 nm. This result demonstrates the prospect of making ultraviolet solid-state lasers pumped by near-infrared light. Moreover, bright white light was emitted from the single crystal prepared with 5.00 mol % Yb2O3, 0.75 mol % Tm2O3, 0.0075 mol % Ho2O3, 2.2425 mol % Y2O3, and 92.00 mol % ZrO2 under excitation at 980 nm, and a bright solid white light source excited by a near-infrared light-emitting diode for practical use is presented.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2024
·
IF 11
Han Liu,Xiaoyan Wu,Fuying Wang,Hongxun Tao,Bin Yu,Haibo Zhao,Jianpeng Li,Minwei Xu,Haiteng Tao,Bo Cui,Yuxiao Wang
Developing recombinant microgels (RMs) with high mechanical and anti-coalescence properties provides a safe and economical method for constructing uniform and stable Pickering emulsions. Previously, we prepared RMs based on polysaccharides using freeze–thaw cycles, displaying excellent stability. Because RMs can be formed between polysaccharides, we studied whether they can be formed between polysaccharides and proteins for preparing Pickering emulsions. Therefore, we report a heat-induced gelation method to generate RMs with bovine serum albumin (BSA) and κ-carrageenan (KC). Owing to heat-induced treatment (90 °C), the high hydrophilicity of KC could be regulated by the exposed hydrophobic groups of BSA, and the system rapidly gelated after cooling (−18 °C) to obtain a dense recombinant structure. The TPA and SEM results further demonstrated that the RMs with a BSA:KC ratio of 1:2 have a typical cubic structure (0.93 μm) and excellent gel strength. RMs adsorbed at the oil–water interface to form non-covalent binding layers, which improved interfacial activity and reduced interfacial tension (95.10°) to obtain more uniform and stable Pickering emulsions. The above results indicate that synthesizing RMs provides a feasible method for constructing uniform and stable Pickering emulsions with low oil content, these are similar to high internal phase emulsions with semi-solid rigid structures.
研究领域:
材料科学
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胶体化学
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食品科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Chengmei Sun,Chengcheng Xu,Wenzhen Ren,Fengya Hu,Jun Yuan,Qingru Wang,Yanru Xie,Kai Wang,Dong Zhang
ZnTiO 3 :Eu 3+ ,Mn 4+ phosphors with hexagonal and cubic structure are synthesized by solvothermal method. The structure of ZnTiO 3 depends on precursors and the annealing temperature. Inverse spinel Zn 2 TiO 4 phase reveals the highest thermostability compared with cubic ZnTiO 3 and hexagonal ZnTiO 3 phases. The different phases of ZnTiO 3 crystals exhibit different photoluminescence properties. The forbidden transition of 4 A 2 g → 2 T 2 g for Mn 4+ is observed in Zn 2 TiO 4 and hexagonal ZnTiO 3 (h-ZnTiO 3 ) due to the decreased symmetry. The zero photon line (ZPL) assigned to 2 E g → 4 A 2 g transition of Mn 4+ is absent in all type ZnTiO 3 phases. A sharp emission peak at 714 nm assigned to ν 6 (Stokes emission) mode of Mn 4+ in h-ZnTiO 3 is present when the temperature was below 270 K, and increases sharply in intensity with the temperature decreasing. The similar PL spectra of cubic ZnTiO 3 and Zn 2 TiO 4 co-doped with Eu 3+ and Mn 4+ show a wide emission band composed of Stokes and anti-Stokes modes. The calculated nephelauxetic parameter increases from 0.84 to 1.03 and 1.18 for Mn 4+ in h-ZnTiO 3 , cubic ZnTiO 3 and Zn 2 TiO 4 , respectively, indicating the covalency decreasing, which causes the red shift of ZPL in h-ZnTiO 3 . The Mn 4+ emissions show stronger temperature dependence than that of Eu 3+ , especially for that in h-ZnTiO 3 matrix. Based on the fluorescence intensity ratio between I Eu 3+ and I Mn 4+ , the highest relative temperature sensitivity of 2.46 %K −1 is observed in cubic ZnTiO 3 (c-ZnTiO 3 ) and Zn 2 TiO 4 . Under the excitation at 550 nm, the highest relative sensitivity of 2.9 %K −1 is achieved in c- and h-ZnTiO 3 mixed phases.
研究领域:
材料科学
·
光学
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2026
·Vol. 16
·期 6
·378
·
IF 4.8
Hao Li,Lin Zhang,You Long,Chao Shen,Song Zhang,Fang Chen,Nan Chen,Chenghong Huang
Paclitaxel is a first-line anticancer drug, but its low water solubility impedes bioavailability. The purpose of this study is to estalish a delivery strategy via carboxymethyl chitosan (CMCS)-encapsulated 6-deoxy-6-mercapto-β-cyclodextrins (dmβCDs)-modified concave cubic gold (CCGs) to achieve PTX release. CCGs were initially synthesized by the one-pot method and further modified by dmβCDs, the dmβCDs can effectively capture PTX molecules, followed by encapsulation with CMCS, and then prepare pH-responsive CMCS/dmβCDs/CCGs nanocarriers after lyophilization. Results indicated that desirable hexagonal CCGs with 50 ± 5 nm size can be obtained by adjusting H 2 O 2 and HClO concentration. FT-IR, Raman and XRD spectra had confirmed dmβCDs successfully grafted to the surface of CCGs. Drug loading experiments demonstrated that the nanocarrier encapsulated PTX in amorphous powder or molecular form have a capacity of 55.05 µg/mL. Drug release experiments revealed PTX release from CMCS/dmβCDs/CCGs nanocarriers carrying a typical pH-responsive profile and indicating earlier release in an acidic environment than in a neutral or alkaline environment. The proposed method can be utilized to effectually achieve high-efficiency solubilization and targeted release inside tumor cells of PTX.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2025
·
IF 12.1
Yan Jia,Xiao Ma,Yi-Bin Yang,Rui Chao,Ji-Kai Li,Peng-Fei Guo,Bing Zhu,Qian-Nan Yang,Wei-Tao Wang,Lu Liu,Zhao-Tie Liu,Yang Yang
Real-time visualization of alloying evolution is crucial yet challenging for designing and synthesizing face-centered cubic (fcc) nanoalloy catalysts for the alkaline oxygen evolution reaction (OER). Here, a trimetallic fcc NiFeMo nanoalloy is synthesized via topological reduction of NiFeMo layered double hydroxide (LDH) under an Ar/H 2 atmosphere. In situ heating transmission electron microscopy reveals the transforamtion of non-hexagonal NiFeMo LDH nanosheets into irregular inverse-spinel Ni 1-x Mo x Fe 2 O 4 nanoparticles, eventually forming spherical fcc NiFeMo nanoalloy particles. Furthermore, the NiFeMo nanoalloy demonstrates a Faradaic efficiency of 99.3% and superior intrinsic OER activity compared to NiFe and Ni nanoalloys at a consistent mass loading, due to synergistic metal interactions. The NiFeMo nanoalloy-modified nickel foam electrode exhibits excellent electrochemical stability, with structural and elemental analyses confirming that the original fcc structure remains intact after long-term OER testing. Operando differential electrochemical mass spectrometry coupled with isotope labelling experiment illustrates that the OER on NiFeMo nanoalloy proceeds via an adsorbate evolution mechanism pathway. Theoretical calculations suggest that Mo species reduce the potential barriers for *OH intermediate formation, thereby enhancing the inherent activity of Ni active sites in the NiFeMo nanoalloy. This work presents a novel approach for developing advanced trimetallic and high-entropy nanoalloy OER catalysts.
研究领域:
材料科学
·
电催化
·
纳米材料
·
能源化学
·
表面科学
·
理论计算
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Longfei Song,Kunpeng Dou,Rongrong Wang,Ping Leng,Linqu Luo,Yan Xi,Chao-Cheng Kaun,Ning Han,Fengyun Wang,Yunfa Chen
In recent years, it is urgent and challenging to fabricate highly sensitive and selective gas sensors for breath analyses. In this work, Sr-doped cubic In2O3/rhombohedral In2O3 homojunction nanowires (NWs) are synthesized by one-step electrospun technology. The Sr doping alters the cubic phase of pure In2O3 into the rhombohedral phase, which is verified by the high-resolution transmittance electron microscopy, X-ray diffraction, and Raman spectroscopy, and is attributable to the low cohesive energy as calculated by the density functional theory (DFT). As a proof-of-concept of fatty liver biomarker sensing, ethanol sensors are fabricated using the electrospun In2O3 NWs. The results show that 8 wt % Sr-doped In2O3 shows the highest ethanol sensing performance with a high response of 21–1 ppm, a high selectivity over other interfering gases such as methanol, acetone, formaldehyde, toluene, xylene, and benzene, a high stability measured in 6 weeks, and also a high resistance to high humidity of 80%. The outstanding ethanol sensing performance is attributable to the enhanced ethanol adsorption by Sr doping as calculated by DFT, the stable rhombohedral phase and the preferred (104) facet exposure, and the formed homojunctions favoring the electron transfer. All these results show the effective structural modification of In2O3 by Sr doping, and also the great potency of the homojunction Sr-doped In2O3 NWs for highly sensitive, selective, and stable breath ethanol sensing.
研究领域:
材料科学
·
纳米技术
·
气体传感
·
密度泛函理论（DFT）
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化学传感器
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环境监测
·
生物医学诊断
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Shuyun Wan,Qiming Liu,Ming Cheng,Yucheng Chen,Hongyi Chen
Sn-based materials have been popularly researched as anodes for energy storage due to their high theoretical capacity. However, the sluggish reaction kinetics and unsatisfied cycling stability caused by poor conductivity and dramatic volume expansion are still pivotal barriers for the development of Sn-based materials as anodes. In this work, the binary-metal Mn2SnO4 nanoparticles and Sn encapsulated in N-doped carbon (Sn@Mn2SnO4-NC) were fabricated by multistep reactions and employed as the anode for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). The coexistence of binary metals (Sn and Mn) can improve intrinsic conductivity. Simultaneously, hollow architecture along with carbon relieves internal stress and prevents structural collapse. A Sn@Mn2SnO4-NC anode delivers an appealing capacity of 1039.5 mAh g–1 for 100 cycles at 100 mA g–1 and 823.8 mAh g–1 for 600 cycles at 1000 mA g–1 in LIBs. When evaluated as an anode in SIBs, the Sn@Mn2SnO4-NC anode tolerates up to 7000 cycles at 2000 mA g–1 and maintains a capacity of 185.8 mAh g–1. Quantified kinetic investigations demonstrate the high contribution of pseudocapacitive effects during the cycle process. Furthermore, density functional theory (DFT) calculations further verify that introduction of the second metal (Mn) improves the conductivity of the material, which is favorable for charge transport. This work is expected to provide a feasible preparation strategy for binary-metal materials to enhance the performance of lithium- and sodium-ion batteries.
研究领域:
储能
·
材料科学
·
电化学
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 9
·2102474
·
IF 6.389
Yu Dong,Yueheng Qi,Wenqing Zhao,Shaohui Yuan,Zihao Zeng,Yue Yang,Wei Sun,Peng Ge
As potential candidates, metal sulfides display strong storage abilities but suffer from serious volume swelling and polysulfide shuttling. Especially rich-sulfur materials, inferior reversible conversion reactions (from MS 2 to MS with S) can bring about major formation of sulfur. Herein, cubic-like Sn–Co–S materials with SnO 2 as catalyst are designed with various dimensional carbon. The as-resulted samples display uniform distributed particle size (≈5 µm), while cross-linked Sn–Co–S@carbon is successfully formed due to its rich surficial groups. Significantly, the formation of chemical bonds about Sn/Co–S–C is noted, facilitating ions/e-transfering and architecture enhancing. Meanwhile, owing to the endothermic effect of carbon, SnO 2 finally resulted, effectively limiting the so-called “shuttling effect” of polysulfide. Utilized as sodium-ion anodes, the optimized samples can deliver a capacity of 490 mAh g −1 at 0.5 A g −1 and ≈400 mAh g −1 above at 5.0 A g −1 . Assisted by the detailed kinetic analysis, it can be confirmed that the improvements of surface-controlling behaviors mainly come from the interfacial chemical bonds and strong-polar metal-oxides bonds. This work is expected to illustrate the roles of interfacial design and metal oxide catalysts for advanced energy storage materials.
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
危险品化学品经营许可证（带存储）