查找使用阿拉丁产品的科研文献

Preparation of a novel two-dimensional carbon material and enhancing Pb(II) removal by tri-isopropanolamine

Xin Wen,Zhanfang Cao,Jing Wang,Shuai Wang,Hong Zhong

A novel tri-isopropanolamine functionalized graphene oxide (TI-GO) adsorbent was synthesized by one-step reaction at 358K. Then the prepared TI-GO was characterized by SEM-EDS, FTIR, Raman spectra, TG, BET and XPS. The characterization results indicated the TI-GO has been synthesized successfully and it interact with Pb(II) ions through its nitrogen and oxygen-containing functional groups. Batch adsorption experiments were applied to evaluate the optimized conditions of adsorption. The results indicated that the TI-GO can reach equilibrium adsorption in 30 min and get maximum adsorption capacity at 293 K, pH 5.0. Besides, the adsorption kinetic and adsorption isotherm research indicated that the adsorption of TI-GO fit pseudo-second-order (PSO) kinetic and Langmuir adsorption isotherm model. In addition, the maximum adsorption capacity evaluated by Langmuir adsorption isotherm equation is 1478 mg/g.

Fabrication of Copper Nanowires Highly Conductive and Flexible Circuits by Direct Ink Writing

Hui Guo,Haoting Huang,Shijian Shi,Qinghua Sun,Jinping Sun,Kang Liu,Qiang Zhu,Peng Zhang

Direct ink writing (DIW) has emerged as a promising method for fabricating flexible electronics. Copper nanowires are a key material for the conductive inks required for this technology. However, copper nanowires suffer from significant challenges, including low aspect ratios, poor oxidation resistance, and difficulty in printing. In this study, a liquid-phase reduction method was used to synthesize copper nanowires with a high aspect ratio (up to 2884) and excellent oxidation resistance. The conductive ink was prepared using ethylene glycol, isopropanolamine (MIPA), and ethanol as solvents. Rheological dynamics simulations were used to investigate the influence of printing parameters on ink printing accuracy, ultimately achieving precise control of the printing process. High-precision copper nanowire flexible circuits with a low resistivity of 2.11 μΩ·cm were fabricated under thermal sintering conditions using the DIW method. These circuits exhibited excellent adhesion, flexural behavior, and water resistance, demonstrating significant practical significance for the low-cost fabrication of high-precision flexible electronic devices.

The synergetic effect on oxidative degradation inhibition of 1-amino-2-propanol for post-combustion CO2 capture

Qi Liu,Yihan Yin,Hongxia Gao,Lianbo Liu,Shisen Xu,Teerawat Sema,Min Xiao,Zhiwu Liang

Amine degradation is one of the key issues that hampers the implementation of large-scale carbon capture technology. Degradation inhibitors can extend the lifetime of amine solutions, thereby lowering the operating cost of CO 2 capture system in the long term. In this work, different inhibitors including chelating agents, scavengers, and their blends were studied to inhibit the oxidative degradation of 1-amino-2-propanol (1AP). Amine loss, alkalinity loss, NH 3 emissions and heat-stable salt production were measured to evaluate the inhibitory effect. The parameter, namely inhibition factor, was proposed to quantify the effect of inhibitors. Two chelating agents were found to show good inhibitory effects on 1AP degradation, with inhibition factors of 7.1 and 4.3, respectively. In addition, the inhibition factor was increased to 9.4 by blending the inhibitors. A significant reduction in the inhibitor dosage was applied to achieve a similar inhibiting effect due to the excellent synergistic effects between the blended inhibitors.

Combined experimental and computational study on elucidating steric effects in amine-based CO2 capture

Min Zhou,Ningbo Yu,Qiang Sun,Hongxia Gao,Jinhang Fan,Zhiwu Liang

This study systematically investigates how steric architecture governs CO 2 absorption kinetics by analyzing six sterically modulated amines in aqueous and ethanol solutions. The stopped-flow apparatus was employed to determine pseudo-first-order kinetic constants (k 0 ) for CO 2 absorption by six sterically hindered amines with varying spatial configurations in aqueous and ethanol solutions within 293.15–308.15 K. The kinetic model based on the zwitterion mechanism outperforms the base-catalyzed hydration mechanism in predictive accuracy, with average absolute relative deviations (AARD) of 1.45–3.31 % in aqueous solutions and 2.28–2.58 % in ethanol solutions. Density functional theory (DFT) calculations reveal that increased molecular steric hindrance diminishes the nucleophilicity of amine-N atoms; the strengthened interactions of –OH groups concurrently facilitate the formation of intramolecular hydrogen bonding, which collectively amplify steric hindrance and thereby diminish reaction kinetics. In addition, ethanol’s strong solvation effects further diminish amine reactivity toward CO 2 , resulting in significantly lower absorption rates in ethanol-based systems compared to aqueous environments. These findings elucidate the complex interplay between steric hindrance, solvent dependence and CO 2 absorption kinetics, providing theoretical guidelines for optimizing design of CO 2 absorbent.

Construction of Zeolite-Type Metal Sulfide “Ion Sieve” Into Electrospun Membranes for Ultrafast and Selective 137Cs+ Sequestration

Lu Yang,Jun-Hao Tang,Jia-Ting Liu,Shao-Qing Jia,Hai-Yan Sun,Chen Sun,Ya-Dong Wu,Mei-Ling Feng,Xiao-Ying Huang

Selective 137 Cs + sequestration is challenging due to its high solubility, environmental mobility, and the influence of excessive competitive ions. Herein, we demonstrate an effective strategy for Cs + separation by constructing zeolite-type metal sulfide as “cesium ion sieve” (CIS), obtaining GaGeS-1 with “ion-sieving effect”. Its structure features a zeolite-type metal sulfide framework with sodalite (SOD) topology based on supertetrahedral T2 clusters. GaGeS-1 with radiation resistance possesses a maximum Cs + adsorption capacity of 332.52 mg/g and ultrafast adsorption kinetics with removal rate ( R Cs ) of 97.06% within 1.5 min. It achieves highly selective Cs + capture under excessive competing ions, even for actual industrial 137 Cs⁺-liquid-waste ( R Cs > 90%). Single crystal structure analysis and density functional theory calculation reveal that “ion-sieving” originates from strong Cs + ···S 2− interaction, flexible-robust framework, and optimal Cs + coordination in SOD cage. Furthermore, GaGeS-1 is integrated with gelatin to fabricate GaGeS-1/Gel nanofibrous electrospun membranes for a multi-stage filtration system, enabling efficient, continuous, and recyclable treatment of mixed Na/Cs wastewater (3.58 L/m 2 , R Cs = 99.39%) and Cs + -contaminated river water (2.63 L/m 2 , R Cs = 99.23%). This study pioneers an efficient “CIS” by developing zeolite-type metal sulfide, and provides a universal assembly method toward practical application, opening new insight into radiocesium remediation and advanced nuclear waste management.

Electrosynthesis-recrystallization method for preparing silver acetate: Application in silver metal-organic decomposition ink

Chenyi Zheng,Songsong Wang,Qiang Wang,Qinmeng Wang,Xueyi Guo

Silver metal-organic decomposition ink (Ag MODI) is a new class of “particle-free” conductive inks that employ Ag organic compounds (OCs) as functional fillers, circumventing the time-consuming and costly preparation processes inherent to conventional Ag-nanoparticle (NP) fillers. Nevertheless, research on short-process, eco-friendly routes for synthesizing Ag OCs remains limited. This study reports an electrosynthesis-recrystallization (ES-R) method for preparing silver acetate (AgOAc) directly from metallic Ag. It eliminates the nitrate contamination inherent in conventional Ag OCs syntheses, generates hydrogen gas (H2) as the sole by-product, and enables closed-loop recycling of the sodium acetate (NaOAc) electrolyte. Moreover, this method effectively streamlines the process chain from metallic Ag to Ag MODI, the as-prepared AgOAc can be used directly as the feedstock for Ag MODI application. Through the method reported herein, the advantages of Ag MODI are effectively amplified, promising to accelerate their substitution for conventional Ag-NP-based inks.

Effect of amine properties on developing CO2 phase change absorbents by means of cosolvent effect

Xianhang Jin,Jiawei Fang,Qian Ma,Rong Wang,Weidong Zhang

As China pledges that its carbon emissions will peak before 2030 and that it will be carbon neutral by 2060, the CO 2 capture technology with high efficiency and low energy-consumption was expected in industry. CO 2 phase change absorbents, CPCAs, had shown a potential to reduce energy consumption for CO 2 capture. Although a lot of CPCAs were reported in the last decade, it still suffered from the lack of theoretical guidance for development. The effect of amine structure, which mainly affects cosolvent effect of amine and salting-out effect of formed salts, on developing CPCAs by means of cosolvent effect was clarified. For cosolvent effect of amine, 12 amines with various carbon chain lengths, isomers and substituents were determined by thermodynamical method and the log P of amine were proposed to characterize the cosolvent effect. The amine with long carbon chain and steric effect showed a high ability to act as a cosolvent to enhance the solubility of 1-butanol in H 2 O. The salting-out effect of formed salts by reacting amine and CO 2 was related to p K a of amine. The absorbent comprising amine with low log P and high p K a was prefer to exhibit phase separation behavior, and benefit to develop CPCAs. Based on this guideline, all amines in this study could be developed as CPCAs by adjusting kinds of amine and diluent. Moreover, to explore the absorption-desorption performance of developed CPCAs, DEA/1-butanol/H 2 O was used as example, the volume ratio, species distributions and CO 2 cyclic capacity were measured. When the absorption temperature was 303 K and desorption temperature was 373 K, The maximum CO 2 cyclic capacity of CPCA was 2.03 mol CO 2 ·kg −1 , which was 34.4% higher than that of 30 wt% DEA/H 2 O.

Fabrication and Sintering Behavior of Nano Cu–Ag Composite Paste for High-Power Device

Weishan Lv,Jiaxin Liu,Yun Mou,Yongjie Ding,Mingxiang Chen,Fulong Zhu

Tuning the CO2 absorption and physicochemical properties of K+ chelated dual functional ionic liquids by changing the structure of primary alkanolamine ligands

Zelalem Anja Zema,Tingting Chen,Hegang Shu,Yingjie Xu

To reveal the effects of the alkyl substitutions at alpha (α) or beta (β) position adjacent to amino group of primary alkanolamine ligands on CO 2 absorption and physicochemical properties of metal chelated dual functional ionic liquids (DFILs), four DFILs were prepared by reacting potassium imidazole salt (KIm) with alkanolamine ligands, including 2-amino-2-methyl-1-propanol (AMP), 2-amino-1-butanol (AMB), DL-1-amino-2-propanol (DLAMP), and monoethanolamine (MEA). CO 2 absorption behavior and mechanism of DFILs were studied, and density ( ρ ), speed of sound ( u ), and viscosity ( η ) of DFILs were measured to correlate with the CO 2 absorption performance. DFT calculations were employed to explore the influence of the interactions between K + and alkanolamine on the CO 2 absorption and physicochemical properties of DFILs. The results show that CO 2 capacity at 333.2 K is as follows: [K(AMP) 2 ][Im] > [K(AMB) 2 ][Im] > [K(DLAMP) 2 ][Im] > [K(MEA) 2 ][Im], indicating that the introduction of alkyl group at α or β position of alkanolamines can enhance CO 2 capacity, and the effect of the α position is more significant than the β position. Both ρ and u follow the order: [K(AMP) 2 ][Im] < [K(AMB) 2 ][Im] < [K(DLAMP) 2 ][Im] < [K(MEA) 2 ][Im], while η is in the reverse order. Moreover, the saturated CO 2 capacity of DFILs has an approximately linear relation with the thermal expansion coefficient. DFT calculations show that the presence of the alkyl group at α or β position of alkanolamines reduces the Mulliken charge of N and O atom, thereby weakening the cation coordination interaction between K + with ligand, resulting in the decrease in ρ and u of DFILs. Moreover, the decrease in the Mulliken charge of N and O atom in alkanolamine leads to the increase of chelated cation-[Im] − interaction, thereby increasing η of DFILs. Consequently, [K(AMP) 2 ][Im] exhibits higher CO 2 capacity and good reversibility, due to the fact that CO 2 can react with the chelated cation and [Im] – simultaneously. The present study provides a new method for effectively regulating the performance of DFILs.

High-efficiency synthesis of Cu superfine particles via reducing cuprous and cupric oxides with monoethanolamine and their antimicrobial potentials

Yanming Feng,Xinyue Lv,Xi Ran,Caifeng Jia,Lujie Qin,Maoshen Chen,Ruijuan Qi,Hui Peng,Hechun Lin

Cuprous oxide (Cu 2 O) and cupric oxide (CuO) are widely available and low cost raw materials. Their applications as precursors for wet chemical synthesis of metallic Cu materials are greatly limited due to their insoluble in water and most organic solvents . In this work, copper superfine particles (Cu SPs) are synthesized using Cu 2 O and CuO as precursors via a heating process in monoethanoamine (MEA). Due to the strong coordinating character, Cu 2 O and CuO can be partially dissolved in MEA. The dissolved copper source is reduced by MEA at elevated temperature with the drastically releasing of NH 3 . As the dissolved copper source is reduced, more oxide will be dissolved and finally leads to the full reduction of Cu 2 O and CuO to produce the Cu SPs. The advantage of this synthesis method is that MEA acts as both the solvent and the reducing agent. The antimicrobial properties are investigated to find that the obtained Cu SPs depress the growth of Escherichia coli (E. coli) and Staphylococcus aureus (St. aureus) efficiently. More interesting, the composites produced via curing Cu 2 O and CuO with a small amount of MEA also exhibit excellent antimicrobial activity, indicating the MEA curing method is high-efficiency. The synthesis is low cost, high-efficiency, high atom-economy and up-scale synthesizing easily, which will benefit the wide applications of Cu SPs.

Three Birds with One Stone: Preventive Protection of Paper Materials by ZnO-PHMB and UV-531 Composite Systems

Dahai Zhang,Qianhao Pan,Minghao Jia,Xiaogang Zhang,Yapei Wang

As the most frequently used archival materials for painting and recording, paper lays the groundwork for the development of prosperous human civilization. However, its susceptibility to three primary factors including external ultraviolet light, increased acidity, and biological pathogens in long-term storage shortens the longevity of paper. Therefore, the protection of paper-based cultural relics is extremely urgent. Inspired by the three adverse factors affecting the protection of cultural relics, we herein propose to combine the ultraviolet absorber 2-hydroxy-4-(octyloxy)benzophenone (UV-531) and alkaline zinc oxide (ZnO) nanoparticles innovatively into the antibacterial agent polyhexamethylene biguanidine hydrochloride (PHMB) to realize the strategy of three birds with one stone for relics protection. This study illustrates that the tensile strength and the folding endurance of different test papers are guaranteed by coating them with the composite reagents, and molds including Mucor, Trichoderma, and Aspergillus niger are effectually sterilized. In addition, a hand-painted Chinese ink-wash painting with beautiful flowers is chosen as the object for simulating cultural relics protection, and negligible color fading is observed in aging experiments. From the perspective of effectiveness, simplicity, and economy, this strategy sheds light on preservative protection of paper-based relics in long-term storage.

Facile preparation of stable reactive silver ink for highly conductive and flexible electrodes

Yun Mou,Hao Cheng,Hao Wang,Qinglei Sun,Jiaxin Liu,Yang Peng,Mingxiang Chen

Stability of conductive ink and mechanical flexibility of conductive pattern are essential for flexible printed electronics. In this work, we reported a stable reactive silver ink for the facile fabrication of flexible electrodes. The ink was mainly composed of silver-isopropanolamine (IPA) complex, formic acid reductant, and hydroxyethyl cellulose (HEC) adhesive agent, and it displayed good chemical stability. The flexible electrodes on polyimide (PI) substrates were achieved by mask-printing and thermal sintering of the ink, and the effects of sintering parameters and HEC adhesive agent content on the electrical and flexible properties and microstructure evolutions of silver layer were systematically investigated. Consequently, the silver layer sintered at 110 °C yields low electrical resistivity of 12.1 μΩ·cm, which is only eight times higher than that of bulk silver. Furthermore, the sintered silver layer still presents excellent flexibility and low relative resistances after the bending, twisting, and folding tests. These results demonstrate that the stable reactive silver ink provides a promising and low cost opportunity for low temperature design and fabrication of high performance flexible printed electronics.