Inorganics
·
2025
·Vol. 13
·期 8
·272
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IF 3
Juan Du,Xiang Wan,Caixiong Song,Kangsheng Wu,Wenbing Yang,Beiye Liu,Qi Yang,Jingjing Fang,Ayesha Razzaq
Crystal twinning, a common growth phenomenon, can substantially affect material performance in fields such as semiconductors, nonlinear optics, and drug development, yet its elimination during crystallization is challenging. This study presents a method for the controlled synthesis of ZSM-5 zeolite as either single crystals or twinned crystals using kaolin as the primary raw material. The method leverages the etching effect of ammonium fluoride (NH4F) on the aluminosilicate structure derived from pre-treated kaolin. By adjusting the concentrations of NH4F and the structure-directing agent tetrapropylammonium bromide (TPABr), pure ZSM-5 single crystals and twinned crystals were selectively synthesized. Conventionally, NH4F is employed to introduce defects into zeolite structures. In contrast, this work demonstrates its utility in controlling crystal habit. The synthesis utilizes kaolin, an abundant and low-cost aluminosilicate mineral, to provide the entire aluminum source and a portion of the silicon source, offering an economical alternative to expensive precursors like aluminum isopropoxide. The resulting single and twinned crystals exhibited high crystallinity, demonstrating the viability of using natural minerals to produce high-quality zeolites. The physical and chemical properties of the kaolin-derived ZSM-5 were characterized and compared to those of ZSM-5 synthesized from conventional chemical reagents. A growth mechanism for the formation of single and twinned crystals is also proposed.
研究领域:
材料科学
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晶体学
·
无机化学
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纳米技术
·
化学合成
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Chenxuan Wang,Xinyi Ma,Zhongyuan Fu,Xiaoyun Hu,Jun Fan,Enzhou Liu
A twinned Mn 0.5 Cd 0.5 S ( T -MCS) homojunction, consisting of wurtzite and zinc-blende Mn 0.5 Cd 0.5 S with different energy band structures, was fabricated using a facile hydrothermal method, resulting in the formation of a type-II bulk phase twinned homojunction. Furthermore, NiCo 2 S 4 nanoparticles were deposited on the surface of T -MCS to form a surface heterojunction. The activities of T -MCS and NiCo 2 S 4 / T -MCS were tested in the photocatalytic H 2 evolution reaction. T -MCS exhibits a superior H 2 evolution rate of 61.4 mmol∙g −1 ∙h −1 under visible light (λ > 420 nm) irradiation owing to faster bulk phase charge separation, which is 8.2 and 1.9 times higher than those of wurtzite and zinc-blende Mn 0.5 Cd 0.5 S, respectively. Moreover, NiCo 2 S 4 can facilitate interfacial electron transfer and can lower the H 2 evolution overpotential; the H 2 evolution rate is boosted to 127.3 mmol∙ g −1 ∙h −1 with an apparent quantum yield (AQY) of 23.4% with irradiation of 2 wt%-NiCo 2 S 4 / T -MCS under 400 ± 7.5 nm light. This work demonstrates that bulk phase twinned homojunctions and a surface heterojunction can combine to promote bulk and interfacial charge transfer and separation, simultaneously improving the kinetics of photocatalytic H 2 evolution.
研究领域:
材料科学
·
能源科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2022
·Vol. 18
·期 38
·2203620
·
IF 15.153
Hongsheng Liang,Limin Zhang,Hongjing Wu
High density and skin effect restrict the research progress of metal predominated electromagnetic wave absorbing (EMA) materials. Although some works try to solve it, they do not focus on the metal itself and do not involve the optimization of the active site of the inherent defects of the metal. In this work, the modulation of morphology, composition, interface, defects, and conductivity is achieved by adjusting the ratio of copper salt to reducing agent chitosan. Uniquely, the appearance of twin boundaries (TBs) accelerates the ability of the homogeneous interfaces to transfer charges, resists the oxidation of metal Cu 0 , keeps the high electric conductivity of Cu 0 nanoparticles, and enhances the conduction loss, which provides a boost for electromagnetic wave dissipation. As a result, the metal Cu 0 predominated absorber (Cu-NC (N-doped carbon)−10,) exhibits an ultra-width effective absorption band of 8.28 GHz (9.72–18.00 GHz) at a thickness of 2.47 mm and the minimum reflection loss ( RL ) value of −63.8 dB with a thickness of 2.01 mm. In short, this work explores the EM regulation mechanism of TBs compared with grain boundaries (GBs), which provides a new insight for the rational design of metal predominated EMA materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
NATURE MATERIALS
·
2025
·
IF 38.5
Li Zhe,Wang Yueshuai,Liu Hui,Feng Yi,Du Xiwen,Xie Zhiheng,Zhou Jihan,Liu Yang,Song Yun,Wang Fei,Sui Manling,Lu Yue,Fang Fang,Sun Dalin
Precious metals such as Pt are favoured as catalysts for the hydrogen evolution reaction (HER) due to their excellent catalytic activity. However, the scarcity and high cost of precious metals have prompted researchers to explore cheaper alternatives such as Cu. Nevertheless, Cu shows poor catalytic performance due to weak binding with intermediates. Here the catalytic activity of pure Cu is activated via electroreduction-driven modification of the local structure, achieving a HER catalytic performance superior to commercial Pt/C catalysts for working current densities greater than 100 mA cm −2 in acid electrolyte. Activation involved two steps. First, polycrystalline Cu 2 O nanoparticles were prepared via pulsed laser ablation, resulting in grain boundaries within the Cu 2 O particles as observed using electron microscopy. Next, the Cu 2 O particles were electroreduced to pure Cu, inducing the formation of distorted nanotwins and edge dislocations. These local structures induce high lattice strain and decrease the Cu coordination number, enhancing the interaction between Cu and intermediates—as calculated using density functional theory—leading to the excellent catalytic activity and durability of the catalyst. Our observations show that low-cost pure Cu can be a promising HER catalyst for large-scale industrial applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2024
·
IF 27.4
Zheng Ma,Yubo Luo,Jinfeng Dong,Yukun Liu,Dan Zhang,Wang Li,Chengjun Li,Yingchao Wei,Qinghui Jiang,Xin Li,Huabing Yin,Vinayak P. Dravid,Qiang Zhang,Shaoping Chen,Qingyu Yan,Junyou Yang,Mercouri G. Kanatzidis
Introducing nanotwins in thermoelectric materials represents a promising approach to achieving such a synergistic combination of thermoelectric properties and mechanical properties. By increasing configurational entropy, a sharply reduced stacking fault energy in a new nanotwinned high-entropy semiconductor AgMnGePbSbTe 5 is reached. Dense coherent nanotwin boundaries in this system provide an efficient phonon scattering barrier, leading to a high figure of merit ZT of ≈2.46 at 750 K and a high average ZT of ≈1.54 (300—823 K) with the presence of Ag 2 Te nanoprecipitate in the sample. More importantly, owing to the dislocation pinning caused by coherent nanotwin boundaries and the chemical short-range disorder caused by the high configurational entropy effect, AgMnGePbSbTe 5 also exhibits robust mechanical properties, with flexural strength of 82 MPa and Vickers hardness of 210 H V .
研究领域:
材料科学
·
热电学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Qing Cheng,Yuqi Zhang,Yingying Cao,Peihao Dou,Long Liu,Yanqiang Zhang
Ionic liquid-H2O2 is a green hypergolic propellant system, and the poor self-ignition hinders its application. Herein, the stable zero-valent catalyst Cu nano-particle with twin boundaries (T-Cu) was synthesized. As the twin boundary regulates the electron micro-environment of the T-Cu surface, the electron transfer from the d electrons of Cu atom to the σ* anti-bonding orbital of H2O2 is intensified to create ·OH and ·OOH. The resulted free radicals possess strong oxidizing ability, and react violently with [BMIM]N(CN)2 to achieve a rapid ignition with the delay time as low as 25 ms. This work provides an effective way to get excellent ignition performance, and promotes the application of Ionic liquid-H2O2 green hypergolic propellants.
研究领域:
材料科学
·
推进剂工程
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Guiping Zhang,Qingyuan Liu,Chunli Xu,Baoxin Li
Chiral nanoparticles are one of the research hotspots in the field of materials science, chemistry, and biology. Understanding and controlling the chirality of nanoparticles is one key step toward their use, but the origin of nanoparticles’ chirality and its determinative factor are not well understood. In this work, we studied the chirality of gold nanoparticles (AuNPs) prepared through the conventional citrate reduction method. Unexpectedly, it was found that small AuNPs (∼13 nm) exhibited opposite chirality to the large AuNPs (>30 nm). The origin of the AuNPs chirality was revealed by comparing the crystal structure between small AuNPs and large AuNPs. It was proposed that the lattice orientation of fivefold-twinned AuNPs may be responsible for the intrinsic chirality of AuNPs. This work provides a deep mechanistic understanding of the intrinsic chirality of the AuNPs and will boost the development of the structure-controlled synthesis and application of chiral AuNPs and other chiral nanomaterials. Furthermore, based on the unexpected size effect, chiral AuNP probes were rationally constructed to improve the precision of chiral recognition.
研究领域:
材料科学
·
化学
·
生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
·
2023
·
IF 6.3
Zhaoqiang Zou,Jinkai Xu,Wanfei Ren,Manfei Wang,Zhenming Xu,Xue Wang,Hanhan Wei,Yan Huo,Huadong Yu
High-performance rectangular solid structures at the scale of 10–50 µm are extensively utilized in the fields of optical engineering and bioengineering . However, producing high-purity metallic rectangular solid structures efficiently and economically at the microscale remains an enormous challenge for most current techniques. Here, additives-induced localized electrodeposition micro additive manufacturing (LECD-µAM) technology was innovatively adopted to achieve high-efficiency, high-purity, and high-quality manufacturing of rectangular solid structures. It was found that the synergistic regulatory effect of the additives guides the electrodeposition process, induces the formation of nanotwins, and enhances the surface quality of the microstructures. The rectangular solid structure exclusively comprises copper and oxygen, devoid of any other elements, with a copper content exceeding 99.7%. The principle and mechanism of additives-induced LECD-µAM were deeply and thoroughly analysed, providing valuable theoretical guidance for further research on high-performance electrochemical additive manufacturing techniques. The novel strategy proposed in this study enables the development of new approaches for the preparation and investigation of various solid structures of different shapes.
研究领域:
光学工程
·
生物工程
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Tong Ye,Yajie Wang,Xiang Yao,Hongbin Li,Taishi Xiao,Kun Ba,Yi Tang,Changlin Zheng,Xiaoyong Yang,Zhengzong Sun
The precise design and synthesis of active sites to improve catalyst’s performance has emerged as a promising tactic for electrochemistry. However, it is challenging to combine different types of active sites and manipulate them simultaneously at atomic resolution. Here, we present a strategy to synthesize Re atom-doped Cu twin boundaries (TBs), through pulsed electrodeposition and boundary segregation. The Re-doped Cu TBs demonstrate a highly efficient nitrogen reduction reaction (NRR) performance. Re-doped Cu TBs showed a turnover frequency of ∼5889 s–1, ∼800 times higher than the pure Cu TB active centers (∼7 s–1). In addition to the “acceptance–donation” activation of N2 molecules, theoretical calculations also reveal that the Re–Re dimer on TB can boost the NRR and impede the hydrogen evolution reaction synchronously, rendering Re-doped Cu TB catalysts with high NRR activity and selectivity.
研究领域:
材料科学
·
电化学
·
催化反应
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CORROSION SCIENCE
·
2023
·
IF 8.3
Aiying Chen,Jungan Jiang,Xiang Li,Juan Hou,Zhiyi Ding,Bin Gan,Kai Zhang
Thin-walled stainless steel (SS) bipolar plate (BP) with a star-shape flow field was fabricated by powder bed fusion (PBF). The full-scaled microstructure analysis was carried out to explore the relationship of cooling rate with the morphology evolution. The high cooling rate results in special nanotwins and stacking faults, together with different types of nano-inclusions. The printed PBFed samples deliver excellent corrosion resistance , surface conductivity and hydrophobicity in the simulated environment of proton-exchange membrane fuel cell. The enhanced corrosion resistance can be attributed to the thicker passivation film promoted by the ultra-fined grains, nano-scaled cluster cells, and nanotwins.
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 ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Xia Wei,Tianyao Wang,Hongbin Dai,Song Li
The hydrazine oxidation reaction (HzOR) plays a critical role in direct hydrazine fuel cells and presents a promising alternative to the kinetics-sluggish oxygen evolution reaction in water reduction. Engineering catalysts with high-density multifold nanotwin structures has emerged as a compelling strategy to enhance catalytic activity. However, the exploration of multifold nanotwins for HzOR applications remains absent. Herein, we report the successful synthesis of a porous Ni-Zn-Cu catalyst featuring high-density twofold and fivefold nanotwins. The Ni-Zn-Cu catalyst supported on Ni foam (Ni-Zn-Cu/Ni foam) exhibits exceptionally high catalytic activity and stability toward the HzOR, achieving a current density of 204.3 mA cm −2 at 0.0 V vs. RHE and retaining up to 89.1 % after 20 h of continuous electrolysis. Online mass spectrometer (MS) analysis indicates that the Ni-Zn-Cu coating facilitates N N bond cleavage of N 2 H 4 . This study offers valuable insights into the development of multifold nanotwin catalysts for advancing HzOR applications.
研究领域:
材料科学
·
催化化学
·
能源科学
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2024
·
IF 5.4
Xia Wei,Tianyao Wang,Hongbin Dai,Song Li
The hydrazine oxidation reaction (HzOR) is critical for direct hydrazine fuel cells and presents a promising alternative to the kinetics-sluggish oxygen evolution reaction in water splitting. Engineering catalysts with high-density nanotwin structures has emerged as a compelling strategy to enhance catalytic activity. However, such catalysts have to be explored for HzOR applications. This work reports the successful synthesis of a porous Ni–Zn catalyst featuring high-density coherent nanotwins (NT-Ni-Zn). NT-Ni-Zn supported on Ni foam exhibited exceptionally high catalytic activity and stability toward the HzOR, achieving a current density of 212.4 mA·cm–2 at 0.04 V vs reversible hydrogen electrode and retaining up to 93.9% after 15 h of continuous electrolysis. In addition, hydrazine-assisted water electrolysis using NT-Ni-Zn/Ni foam as both the cathode and anode require only a cell voltage of 70 mV to reach 10 mA cm–2. The exceptional HzOR activity of the Ni–Zn catalyst is attributed to the presence of the nanotwin structure, which promotes a favorable d-band center position and facilitates strong hydrazine binding on the twinned surface. This study provides valuable insights into the development of nanotwin catalysts for HzOR advancement.
研究领域:
材料科学
·
电化学
·
能源转换与存储
✓ 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）