GREEN CHEMISTRY
·
2025
·
IF 9.2
Shengxi Zhao,Kaiyu Xie,Ali Reza Kamali
A clean and efficient method for synthesizing Co₃Fe₇ intermetallic is reported, based on the water-asisted molten salt electrolysis employing CoFe₂O₄ electrode, which was fabricated through the thermo-mechanochemical treatment of iron and cobalt oxides. The electrolysis is conducted at the cell voltage of 1.5 V, achiving an energy consumption of 1.47 kWh/kg. Upon formation, the synthesized Co3Fe7 serves as an electrode for catalytic hydrogen production, demonstrating a current density of 91.72 mA/cm2. These performances are compared with those of electrolytic Fe (1.49 kWh/kg, 96.45 mA/cm²) and electrolytic Co (1.30 kWh/kg, 40.76 mA/cm²), both prepared under the same electrolysis potential but with different current-time profiles. The electrolytic Co3Fe7 exhibits superior ferromagnetic properties, with saturation magnetization, remanent magnetization and coercivity values of 157.0 emu/g, 4.3 emu/g and 48.9 Oe, respectively, surpassing values reported in the literature for Fe-Co alloys. The findings suggest a sustainable approach for the green synthesis of Co₃Fe₇ with enhanced ferromagnetic properties. Additionally, the electrolytic Fe and Co₃Fe₇ show promise as electrode materials for molten salt hydrogen production.
研究领域:
材料科学
·
电化学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE SCIENCES
·
2024
·
IF 3.4
Yao Wang,Pengzhan Zhang,Fan Li,Liang Zhang,Bing Xu,Kangkang Wang,Zhixian He,Yuyan Sun,Shengnan Zhang
Bi 3 NbO 7 loaded on porous carbon (BNO/PC) composite materials has been prepared by the in-suit sol-gel method. The photocatalytic efficacy of the BNO/PC composite has been evaluated by degrading tetracycline (TC) in an environment of visible light and hydrogen peroxide. Moreover, the relevant influencing factors of TC degradation efficiency have been explored through a series of condition optimization experiments. UV–vis DRS and PL tests showed that the loading on porous carbon significantly broadens the visible light response range of the catalyst and improves the separation efficiency of photogenerated carriers. Compared with the bare BNO, the specific surface area and average pore diameter of the BNO/PC composite material increased greatly. The optimal sample of 35 % BNO/PC exhibited outstanding visible light response ability and excellent charge separation efficiency. The “cata + H 2 O 2 +vis” system had the highest photocatalytic activity, with TC degradation reaching 86.9 % after 60 min of visible light illumination. The addition of hydrogen peroxide (H 2 O 2 ) promoted the formation of more powerful active substances. Following this, a mechanism for photocatalytic degradation has been proposed.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2013
·
IF 5.008
Shaodong Sun,Xiaozhe Zhang,Yuexia Sun,Shengchun Yang,Xiaoping Song,Zhimao Yang
We have demonstrated an interesting approach for the one-pot synthesis of cupric oxide (CuO) nanourchins with sub-100 nm through a sequential dissolution–precipitation process in a water/ethanol system. The first stage produces a precursory crystal [Cu7Cl4(OH)10H2O] that is transformed into monoclinic CuO nanourchins during the following stage. Water is a required reactant for the morphology-controlled growth of different CuO nanostructures. When evaluated for their nonenzymatic glucose-sensing properties, these CuO nanourchins manifest higher sensitivity. Significantly, this water-dependent precursor transformation method may be widely used to effectively control the growth of other metal oxide nanostructures.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 5
·2866-2871
·
IF 3.361
Hui Cheng,Yanfeng Yin,Jianbo Tang,Donghua Fan,Jan J. Huang,Shengye Jin
All-inorganic perovskite materials have emerged as highly promising materials for solar cells and photoelectronic applications. However, the poor stability of perovskites in ambient conditions significantly hampers their practical applications. In this work, we report a three-step synthesis of size tunable CsPbX3 (X = Br, Cl, or I) quantum dots (QDs) embedded in zeolite-Y (CsPbX3-Y), which involves efficient chemical transformation of non-luminescent Cs4PbX6 to highly luminescent CsPbX3 by stripping CsX through an interfacial reaction with water. We show that the size and the emission of CsPbX3 in CsPbX3-Y can be tuned by the amount of water added as well as the halide composition. More importantly, the as-prepared CsPbX3-Y show significantly enhanced stability against moisture upon protection by zeolite-Y. This work not only reports a new pathway for the preparation of highly luminescent CsPbX3 but also provided new insights into the chemical transformation behavior and stabilization mechanism of these emerging perovskites.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Jianhui Li,Haiting Yan,Dongfeng Dang,Wei Wei,Lingjie Meng
Graphene has attracted enormous attention due to its unique physical properties and attractive applications in many fields. However, it is an ongoing challenge to develop a facile and low-cost method for the large scale preparation of high-quality graphene (HQGr). In this work, we have developed an improved liquid-phase exfoliation method to mass produce HQGr. This method is quite simple but efficient by exfoliation of graphite in organic solvent with the co-assistance of sodium citrate and water. Remarkably, the concentration of as-exfoliated HQGr was as high as 0.71 mg/mL under optimal conditions, while the oxygen content in HQGr was only 2.39%. After annealing at 500 °C for 2 h in argon atmosphere, the mean conductivity of annealed HQGr was as high as 1.4 × 10 4 S m −1 . Therefore, this facile method for liquid-phase exfoliation of graphite has excellent potential in the industrial-scale production of HQGr for numerous applications in energy storage, optical and electronic fields.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 11
·2725-2733
·
IF 7.779
Shouxin Bao,Mingyang Lv,Chen Zhao,Ping She,Zhenyu Lei,Xiaowei Song,Mingjun Jia
Metal–organic frameworks (MOFs) have shown excellent adsorption and degradation performance towards different kinds of dyes but suffer problems in the desorption process, where adsorbates cannot be completely removed and may cause energy waste or secondary pollution by the repeated washing with eluent, as well as their relatively weak stability in aqueous solutions. Thus, it is very attractive to integrate MOFs with active ingredients to prepare MOF-based composites with dye adsorption and degradation ability. The reported fabrication method of MOF@TiO2 usually involves high crystallization temperature or contains acid or base additives, which are unfriendly to MOF structures. Here, we report the design of MOF@TiO2 core–shell nanostructures via a surfactant-free amorphous TiO2 coating followed by water-assisted crystallization at a low temperature (100 °C) below the decomposition temperature of most MOFs. Owing to the mild crystallization conditions, MOF cores are maintained and TiO2 shells crystallize to an active anatase phase. The obtained MOF@TiO2 core–shell nanostructures showed excellent dye removal efficiency and stability for anionic dyes, which can remove 98% dye after five adsorption and photodegradation cycles due to the synergistic effect of MOF cores and TiO2 shells. The design concept and synthetic strategy via the water-assisted crystallization method for labile MOF materials encapsulated in functional TiO2 shells may be used to construct other multifunctional MOF core–shell nanostructures, broadening their applications in diverse fields.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2021
·Vol. 19
·期 3
·1249-1254
·
IF 1.968
Milad Kermani,Vaclav Pouchly,Yong Lin,Chunfeng Hu,Salvatore Grasso
Water-Assisted cold isostatic Pressing (WAP) enabled pressure-less sintering of fine grained (0.6 μm) and nearly full dense (99.3%) weakly translucent alumina ceramics. As a term of comparison, Dry Pressed (DP) samples, prepared under identical processing conditions, maintained an opaque appearance, and their relative density did not exceed 97.7%. The enhanced compaction of WAP allowed to lower the sintering temperature down to 1350°C, which is approximately 100–150°C lower than that of DP powder. WAP samples resulted in an apparent activation energy for sintering (640 kJ/mol) matching literature values, confirming that the enhanced sinterability was attributed to an improved green density rather than a change in sintering mechanisms.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Hang Zhou,Xiaomeng You,Zejiang Huang,Beibei Xu,Yingli Shi,Xuelu Wang,Ye-Feng Yao
Dual-atom catalysts, which combine the strengths of single-atom catalysts and metal alloys, are considered optimal for facilitating electrocatalytic CO 2 reduction processes. However, developing the means of enhancing the utilization efficiency of bimetallic atoms at catalytic sites and controlling the complex atomic coordination environment to achieve high selectivity and Faradaic efficiency remain a challenge. The present work addresses this issue by synthesizing a bimetallic SnCu-WC x catalyst via the introduction of individual Sn and Cu atoms supported on a tungsten carbide substrate. High Faradaic efficiencies of 98.62 % and 90.19 % at current densities of 100 and 500 mA cm −2 for the reduction of CO 2 to formate are respectively achieved through modulation of the coordination environment and electron/proton transfer during catalysis, the creation of shared adsorption sites, and the promotion of synergistic electrocatalysis. The results of operando nuclear magnetic resonance spectroscopy indicate that activated *OH groups are involved in the formation of formate due to the affinity of individual Sn atoms in the SnCu-WC x catalyst toward *OH. Density functional theory calculations confirm that the presence of individual Sn atoms in SnCu-WC x promotes the dissociation of H 2 O, and thereby modulates the catalytic microenvironment to accelerate the kinetics for the conversion of activated *CO to *COOH groups. Accordingly, the proposed strategy offers new insights into the design of bimetallic catalysts.
研究领域:
材料科学
·
电催化
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yu Zhuang,Liang Wang,Chenghao Cui,Yeying Cui,Dezhi Yang,Kangning Gao,Zhiqian Hou,Yanan Yang,Tao Zhang
Solid-phase sintering (SS) is a widely used method for synthesizing oxides due to its simplicity and scalability. However, it typically relies on organic liquids as grinding media, resulting in higher costs and environmental pollution. This study proposes a boiling water-assisted solid-phase sintering (BWA-SS) method for synthesizing oxide electrolyte materials, in which water is used as the grinding medium and the precursor slurry is directly sintered, providing an eco-friendly process. More importantly, finite element analysis shows that this method prevents the uneven sedimentation of raw material particles by secondary dispersion caused by the vapor mass flux gradient in boiling water. Using this organic-free method, the pure Li7La3Zr2O12 (LLZO) solid electrolyte is successfully synthesized, achieving a high ionic conductivity (σi) of 6.22 × 10–4 S/cm, which is comparable to that of LLZO solid electrolyte material produced by the conventional SS method. The assembled Li/LLZO/Li symmetrical cell exhibits stable cycling for 3000 h at a current density of 0.1 mA/cm2. This method has also been successfully extended to the synthesis of other solid electrolytes (LiTa2PO8, LTPO) and cathode materials (LiNi0.8Co0.1Mn0.1O2, NCM811), demonstrating potential for clean preparation of various oxide materials.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Can Wu,He Huang,Xiangyu Jin,Xiaojie Yan,Hebing Wang,Yiwu Pan,Xinghong Zhang,Changqing Hong
The applications of traditional organic aerogels are commonly restricted by their powder falling, expensive preparation, and poor mechanical property. Herein, we report a phenolic resin aerogel based on the nano-structure of thick-united phenolic particles instead of the traditional thin-united connection. The aerogels fabricated through sol–gel reaction and interfacial polymerization are endowed with superior mechanical and outstanding thermal insulation performances. The 3D networks of phenolic resin aerogel obtained through the water-assisted method (PRAW) with domain sizes below 90 nm result from the phase separation in nanoscale. The highly porous PRAW exhibits excellent compressive properties with the compressive strength and modulus reaching 18.3 and 62.23 MPa, respectively, when the strain exceeds 50% without catastrophic collapse. Furthermore, it possesses excellent high temperature protection ability: a 20 mm thick sample can resist the temperature of 1200 °C for 5 min, with a final back-side temperature of 57.7 °C. This newly inexpensive and environmental-friendly methodology for PRAW preparation provide a broad application prospect in the field of thermal insulation under harsh environments.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
AICHE JOURNAL
·
2016
·Vol. 63
·期 3
·1002-1009
·
IF 2.98
Pei Xie,Kai Wang,Peijian Wang,Yang Xia,Guangsheng Luo
Bromobutyl rubber (BIIR) is an important synthetic rubber with better vulcanizing behavior than traditional butyl rubber (IIR). It is hard to synthesize for the high reactant viscosity and strong corrosion caused by Br 2 and HBr. A microreactor platform was developed to solve the corrosion problem with cheap materials and obtain high quality BIIR based on microscaled mixing. The results showed that low reaction temperature and quickly eliminating HBr from the reacting solution were crucial to obtain high selectivity of demanded molecule structure and prevent polymer from decomposition. Owing to the corrosion resistance ability, a water assistant technology was successfully implemented in the microreactor system, which produced high quality BIIR with almost 100% selectivity and less reduced molecule weight. © 2016 American Institute of Chemical Engineers AIChE J , 63: 1002–1009, 2017
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Dandan Chen,Yanshuang Ba,Minyu Deng,Weidong Zhu,Wenming Chai,He Xi,Dazheng Chen,Jincheng Zhang,Chunfu Zhang,Yue Hao
Inorganic lead halide perovskite CsPbCl3 with an absorption edge of ∼420 nm and exceptional optoelectronic properties is promising for selective ultraviolet (UV)-harvesting visibly transparent photovoltaics. However, the low solubilities of CsCl and PbCl2 precursor materials in common solvents make it difficult to prepare high-quality CsPbCl3 films with the desired thickness. Herein, we demonstrate a water-assisted two-step spin coating growth strategy for CsPbCl3 films. Because of the high solubility of CsCl but the low solubility of PbCl2 in water, it becomes possible to produce CsPbCl3 films by direct spin coating of CsCl/H2O solution onto a PbCl2 film without damaging it. After optimizing the dose of CsCl/H2O solution, CsPbCl3 films with a full surface coverage, pure perovskite phase, high crystallinity, large average grain size of 620 nm, and thickness of ∼310 nm are obtained. Consequently, the selective UV-harvesting visibly transparent PSCs with the CsPbCl3 films yield an optimized efficiency of 1.19%, an average visible transparency of 53.1%, and a color rendering index of 91.1. The findings of our study make it clear that the water-assisted two-step spin coating growth strategy is highly feasible to prepare CsPbCl3 films with desired characters, and thus, it has a great potential in the future development of CsPbCl3 optoelectronic devices.
研究领域:
材料科学
·
光电材料
·
可再生能源
✓ 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）