Nanoscale
·
2017
·Vol. 9
·期 41
·15982-15989
·
IF 7.367
Weijing Yao,Qingyong Tian,Jun Liu,Qingwen Xue,Mengxiao Li,Li Liu,Qiang Lu,Wei Wu
Advanced anti-counterfeiting labels have aroused an intensive interest in packaging industry to avoid the serious issue of counterfeit. However, the preparation and cost of the existing labels associated with the drawbacks, including the complex and high-cost equipment, limit the protection of the authenticity of goods. Herein, we developed a series of anti-counterfeiting labels based on multicolor upconversion micro-particles (UCMPs) inks via straightforward and low-cost solutions, including spin-coating, stamping and screen printing. The UCMPs were synthesized through a facile hydrothermal process and displayed tunable red (R), green (G) and blue (B) color by doping different lanthanide ions, which are Er3+/Tm3+, Yb3+/Er3+ and Yb3+/Tm3+ in NaYF4 hosts, respectively. The optimal UCMPs inks were deposited on a flexible polyethylene terephthalate (PET) substrate to obtain transparent anti-counterfeiting labels possessing higher transmittance, stronger upconversion fluorescence intensity and good photostability. Under ambient conditions, the patterns and films were transparent, but could exhibit multicolor light under 980 nm laser excitation. They can be used as anti-counterfeiting labels for die-cutting packages to further elevate the security of goods. The tunable and designable transparent anti-counterfeiting labels based on RGB UCMPs inks exhibit the merits of low-cost, easy-manufacture and versatility, underlying the practical application in the field of anti-counterfeiting.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 16
·3810
·
IF 4.2
Boyu Dong,Yuhan Xie,Yongbing Lou
The efficiency and reproducibility of perovskite solar cells (PSCs) are significantly influenced by the purity of lead iodide (PbI2) in the raw materials used. Pb(OH)I has been identified as the primary impurity generated from PbI2in water-based synthesis. Consequently, a comprehensive investigation into the impact of Pb(OH)I impurities on film and device performance is essential. In this study, PbI2, with varying stoichiometries, was synthesized to examine the effects of different Pb(OH)I levels on perovskite device performance. The characterization results revealed that even trace amounts of Pb(OH)I impede the formation of precursor prenucleation clusters. These impurities also increase the energy barrier of the α-phase and facilitate the transition of the intermediate phase to the δ-phase. These effects result in poor perovskite film morphology and sub-optimal photovoltaic device performance. To address these issues, a cost-effective method for preparing high-stoichiometry PbI2was developed. The formation of Pb(OH)I was effectively inhibited through several strategies: adjusting solution pH and temperature, modifying material addition order, simplifying the precipitation–recrystallization process, and introducing H3PO2as an additive. These modifications enabled the one-step synthesis of high-purity PbI2. PSCs prepared using this newly synthesized high-stoichiometry PbI2demonstrated photovoltaic performance comparable to those fabricated with commercial PbI2(purity ≥ 99.999%). Our novel method offers a cost-effective alternative for synthesizing high-stoichiometry PbI2, thereby providing a viable option for the production of high-performance PSCs.
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
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2023
·
IF 3.5
Yangyutong Zhou,Zhenjin Fu,Lang Wu,Fang Li
This study presents a cost-effective method using sol-emulsion-gel approach to prepare micron-sized multicomponent silicate microspheres (SMs). SMs were obtained via rotary evaporation using water glass or silica sol as the silicon source. Results revealed that two-stage heating drying or two-step ion exchange treatment effectively suppressed crystallization in water glass-based SMs. The size and concentration of silicon sources and the rotary evaporation temperature dominated the sphericity and surface wrinkling of SMs. Smaller silicon sources like water glass or 5 nm silica sol with relatively high concentration, along with a suitable evaporation temperature like 65 °C, contributed to higher sphericity and smoother surfaces. The formation mechanism of microsphere crystallization and methods for its suppression were analyzed based on emulsion drying theory. Formation principles of microspheres with different morphologies were explained using wet-shell and dry-shell drying models. This method enables low-cost, large-scale fabrication of high-performance hollow glass microspheres (HGMs) with high quality SMs.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
·
2014
·Vol. 53
·期 38
·10147-10149
·
IF 11.336
Lili Ren,Sumin Cui,Fengchao Cao,Qinghui Guo
Inorganic oxide aerogels have unique thermal, optical, electrical, magnetic, and chemical properties, which result in them potentially having a broad range of applications. However, their preparation is commonly based on a supercritical drying method, which greatly limits real applications of aerogels and their commercialization. Here we demonstrate a general method for drying wet gels to form aerogels that is based on the sublimation of organic solvent. The organic solvent must have a low surface tension, undergo sublimation easily, and have a high freezing point to allow the rapid synthesis of monolithic inorganic oxide aerogels under vacuum conditions. This cost-effective process will facilitate application of aerogel materials. This approach may also be used for the preparation of other porous materials, whose theoretical and practical applications should be investigated. Graphical Not cracking up : A drying method based on the sublimation of organic solvent allows the rapid synthesis of the monolithic inorganic oxide aerogels without cracks from wet gels. The method proceeds by endothermic evaporation of organic solvent at the outer surface followed by sublimation of solidified solvent (see picture).
研究领域:
材料科学
·
纳米科技
·
化学工程
·
功能材料
✓ 已验证
DOI
高影响因子
Advanced Science
·
2023
·Vol. 10
·期 32
·2302618
·
IF 15.1
Wei Zhou,Changsheng Song,Shuyang Li,Miao Liu,Huiwen He,Shaoyu Yang,Jin Xie,Fei Wang,Fang Fang,Dalin Sun,Jie Zhao,Yun Song
All-solid-state sodium-ion batteries have the potential to improve safety and mitigate the cost bottlenecks of the current lithium-ion battery system if a high-performance electrolyte with cost advantages can be easily synthesized. In this study, a one-step dehydrogenation-assisted strategy to synthesize the novel thio-borohydride (Na-B-H-S) electrolyte is proposed, in which both raw material cost and preparation temperature are significantly reduced. By using sodium borohydride (NaBH 4 ) instead of B as a starting material, B atoms can be readily released from NaBH 4 with much less energy and thus became more available to generate thio-borohydride. The synthesized Na-B-H-S (NaBH 4 /Na-B-S) electrolyte exhibits excellent compatibility with current cathode materials, including FeF 3 (1.0–4.5 V), Na 3 V 2 (PO 4 ) 3 (2.0–4.0 V), and S (1.2–2.8 V). This novel Na-B-H-S electrolyte will take a place in mainstream electrolytes because of its advantages in preparation, cost, and compatibility with various cathode 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
ACS Applied Energy Materials
·
2021
·
IF 6.024
Caiyun Sun,Qiantong Song,Jinglei Lei,Dan Li,Lingjie Li,Fusheng Pan
The preparation approaches of highly efficient FeNi (oxy)hydroxide electrocatalysts for oxygen evolution reaction (OER) are usually complicated and high cost. Here, we develop a simple and cost-effective corrosion method to in situ fabricate the amorphous FeNi (oxy)hydroxides with an optimal Fe/Ni atomic ratio as highly efficient OER electrocatalysts. The corrosion process took place in a HCl solution at room temperature, which simultaneously changed the chemistry and morphology of the FeNi (oxy)hydroxide electrocatalysts. The as-fabricated amorphous FeNi (oxy)hydroxide nanosheets exhibit enhanced electrocatalytic performance in the alkaline OER process with a low overpotential of 231 mV at a current density of 20 mA cm–2, a Tafel slope of 62.9 mV dec–1, and long-term (more than 60 h) durability, which is superior to most electrocatalysts reported and the commercial catalyst IrO2. The corrosion method proposed in this work sheds insights into economically fabricating amorphous FeNi (oxy)hydroxide catalysts toward high-performance electrocatalysis.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOM
·
2019
·Vol. 72
·期 6
·2245-2249
·
IF 2.305
Zhang Yannan,Zhang Yingjie,Li Xue,Liu Jiaming,Zhang Mingyu,Yang Xi,Huang Mengyang,Xu Mingli,Dong Peng,Zhou Zhongren
The molten salt electrolytic method was introduced to prepare metallic silicon that simply utilizes SiO 2 powder as the raw material and equimolar CaCl 2 -NaCl as the electrolyte under 1.8 V current at 700°C for 5 h.
The electrochemically synthesized silicon was in the form of nanowire structures with average sizes of 90 nm in diameter and over 1 μm in length. The current efficiency and specific energy consumption of producing silicon nanowires were calculated to be 79.2% and 8.703 kWh/kg, respectively. Benefiting from the synthesized nanowire structure, the silicon anode exhibited a high initial discharge-specific capacity of 3348.1 mAh/g with an initial coulombic efficiency of 85.2%.
The present research provides a straightforward idea to show the feasibility of synthesizing silicon-based material by the molten salt electrolytic method and to introduce the application of synthesized silicon nanowires to lithium-ion battery systems.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
无机合成
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Zhaoping Hou,Jian Shu,Yuanzheng Han,Liangliang Liu,Wanggang Zhang,Zhong Huang,Shaowei Zhang
This study developed a bauxite-based ceramic microfiltration membrane with a sandwich structure, featuring dual mullite-whisker separation layers surrounding a coarse-particle intermediate layer, fabricated through a simplified sieving and co-sintering process. The separation layers, derived from fine bauxite particles, formed high-aspect-ratio mullite whiskers on their surfaces, imparting superhydrophilic properties. The intermediate layer, built from coarse bauxite particles, enhanced the flow rate due to its macroporous structure. The integrated sandwich design delivered exceptional oil/water separation efficiency (96.9 %) and a high pure water flux of 669.3 L·m⁻²·h⁻¹ , balancing selectivity and permeability. The membrane also showed remarkable durability, retaining a water flux of 547.3 L·m⁻²·h⁻¹ after simple cleaning and recycling, with separation performance for emulsions of varying concentrations dropping by less than 1.5 % after 9 cycle tests. This cost-effective, scalable fabrication method highlights the potential of bauxite-based ceramic membranes for efficient and sustainable oil-in-water separation applications.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy Materials
·
2019
·Vol. 9
·期 46
·1902767
·
IF 24.884
Jingyi Wu,Zhixiang Rao,Zexiao Cheng,Lixia Yuan,Zhen Li,Yunhui Huang
All-solid-state batteries are promising candidates for the next-generation safer batteries. However, a number of obstacles have limited the practical application of all-solid-state Li batteries (ASSLBs), such as moderate ionic conductivity at room temperature. Here, unlike most of the previous approaches, superior performances of ASSLBs are achieved by greatly reducing the thickness of the solid-state electrolyte (SSE), where ionic conductivity is no longer a limiting factor. The ultrathin SSE (7.5 µm) is developed by integrating the low-cost polyethylene separator with polyethylene oxide (PEO)/Li-salt (PPL). The ultrathin PPL shortens Li + diffusion time and distance within the electrolyte, and provides sufficient Li + conductance for batteries to operate at room temperature. The robust yet flexible polyethylene offers mechanical support for the soft PEO/Li-salt, effectively preventing short-circuits even under mechanical deformation. Various ASSLBs with PPL electrolyte show superior electrochemical performance. An initial capacity of 135 mAh g −1 at room temperature and the high-rate capacity up to 10 C at 60 °C can be achieved in LiFePO 4 /PPL/Li batteries. The high-energy-density sulfur cathode and MoS 2 anode employing PPL electrolyte also realize remarkable performance. Moreover, the ASSLB can be assembled by a facile process, which can be easily scaled up to mass production.
研究领域:
材料科学
·
储能
·
电化学
·
电池技术
·
高分子科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）