Journal of Coatings Technology and Research
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2023
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IF 2.3
Li Yanchun,Zhou Shilin,He Jin,Lai Yuwen,Yan Wentao,Zhou Yong,Gao Congjie
During interfacial polymerization, the in situ growth of nanobubbles can exist between the support layer and the separation layer of the membrane, which changes the microstructure of the membrane and improves its performance. The incorporation of R812s SiO 2 in the preparation of the mixed matrix nanofiltration membrane increases the surface interface pores, thereby improving the flux. In this study, NH 4 HCO 3 foaming agent was introduced into the aqueous phase of the R812s SiO 2 nanofiltration membrane to react with the byproduct HCl generated during the interface process, thus generating nanobubbles that exist between the support layer and the separation layer. The surface of the membrane was characterized by related instruments. It was found that the addition of NH 4 HCO 3 generates a large number of nanobubbles, causing significant changes to the membrane surface, and resulting in increased protrusions and pore size, greatly improving membrane flux while slightly reducing the rejection of sodium sulfate.
研究领域:
材料科学
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膜技术
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化学工程
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DOI
高影响因子
JOURNAL OF RARE EARTHS
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2016
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IF 2.188
Siyuan CHEN,Jintai FAN,Liangjie PAN,Benxue JIANG,Xiaojian MAO,Rihong LI,Xinqiang YUAN,Xiongwei JIANG,Long ZHANG
Yb:Lu 3 Al 5 O 12 (Yb:LuAG) nano powders were synthesized with the co-precipitation method from cation (Lu 3+ , Yb 3+ , Al 3+ ) solution of different concentrations using NH 4 HCO 3 as the precipitant. The influence of cation concentration on the morphology and purity of the calcined powders was studied. Contrary to the conventional suggestion that recommends thin solution to obtain loosely agglomerated nano powders, results showed that thin cation (Lu+Yb+Al) concentration ≤0.08 mol/L led to formation of Al 2 O 3 and LuAP impurities in the obtained nano powders. By means of Tg/(DTA), X-ray diffraction (XRD), scanning electron microscopy (SEM), the cause was revealed to be re-dissolution of Lu at high pH value that resulted from the decomposition of NH 4 HCO 3 . (Lu+Yb+Al) concentration of ∼0.24 mol/L was recommended to achieve pure Yb:LuAG nano powders. Transparent Yb:LuAG ceramics were fabricated with the prepared Yb:LuAG nano powders. The transmittance around 800 nm was 77.5%.
研究领域:
材料科学
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光学材料
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2024
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IF 18.5
Yaping Wang,Pengcheng Yuan,Xiong Xiong Liu,Shengfa Feng,Mufan Cao,Jianxiang Ding,Jiacheng Liu,Song-Zhu Kure-Chu,Takehiko Hihara,Long Pan,ZhengMing Sun
Composite solid electrolytes (CSEs) integrate the fast ion conductivity of inorganic electrolytes and the excellent interfacial compatibility of polymer electrolytes. Typically, fluoropolymers and garnets are promising individuals to formulate cutting-edge CSEs owing to their unique properties. However, the alkaline garnets can induce the dehydrofluorination of fluoropolymers, deteriorating their CSEs performance. Here, for the first time, NH 4 HCO 3 is proposed as a sacrificial inhibitor to effectively prevent the garnet-induced dehydrofluorination, using Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) and poly(vinylidene fluoride- co -hexafluoropropylene) (PVH) as symbolic garnets and fluoropolymers, respectively. Various findings demonstrate that NH 4 HCO 3 can buffer the alkalinity of LLZTO, thereby inhibiting the dehydrofluorination of PVH. In addition, NH 4 HCO 3 can completely decompose to volatiles upon drying without compromising the properties of LLZTO and PVH. Additionally, a polymer-in-salt strategy is further introduced by adding high-concentration LiTFSI salt to the above system, resulting in the PVH/LiTFSI/LLZTO (PLL) CSEs. Benefiting from the synergetic coupling of the sacrificial inhibitor and polymer-in-salt strategies, the PLL exhibits an exceptionally high ionic conductivity of 1.2 mS cm −1 at 25 °C and stable voltage of 5.09 V, outperforming other reported CSEs. Consequently, the PLL delivers impressive high-rate cyclability in solid-state lithium-metal batteries with an outstanding capacity retention of 95.4% after 240 cycles at 1 C (25 °C).
研究领域:
材料科学
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电化学
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能源存储
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DOI
高影响因子
CHEMICAL PHYSICS LETTERS
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2019
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IF 1.901
Shenghan Zhang,Yang Jiao
Aqueous ammonia is a potential absorbent for post-combustion carbon capture. Desorption of carbon dioxide (CO 2 ) from ammonium bicarbonate (NH 4 HCO 3 ) solution is one of key reactions of regeneration of the absorbent. Experimental studies on decomposition of NH 4 HCO 3 solution with and without nano-TiO 2 at different temperatures were conducted. Additions of nano-TiO 2 into ammonium bicarbonate solutions decrease the apparent activation energy of overall decomposition reaction and accelerate the decomposition of ammonium bicarbonate solutions. Moreover, compared to hydrophilic nano-TiO 2 , hydrophilic lipophilic nano-TiO 2 exerts more significant promoting effects on the decomposition reaction.
研究领域:
化学工程
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环境科学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2019
·Vol. 43
·期 23
·8950-8957
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IF 3.069
Xi Wang,Xue-Chen Xu,Mian Yang,Peng Jiang,Jie Zhao,Feng-Lei Jiang,Yi Liu
New multicolor carbon dots made from D-fructose and NH4HCO3, denoted as F-CDs, have been synthesized via a time-saving and energy-saving microwave-assisted method. By just adjusting the concentration, the optimal emission wavelength of the F-CDs could be tuned from 404 nm to 583 nm. Furthermore, the sp2 carbon core and abundant functional groups provided the foundation for concentration-dependent photoluminescence properties. The relationship between the aggregation process and the concentration-induced photoluminescence mechanism is fully discussed. The maintenance of the F-CDs’ PL intensity with increasing concentration occurred by a mechanism similar to the crosslinked enhanced emission (CEE) effect. Finally, the highly stable and biocompatible multicolor F-CDs were successfully applied in fluorescent ink and multicolor bioimaging.
研究领域:
材料科学
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生物医学工程
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光学
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产品关联
DOI
高影响因子
ACS Catalysis
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2026
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IF 13.6
Suiyang Dai,Jiahua Luo,Yuhan Zhou,Xin Liu,Yechao Su,Yabo Bian,Xueyan Sun,Ferenc Lónyi,Hongliang Li,Yongzhi Zhong,Jie Zeng
Ammonium bicarbonate (NH4HCO3) is a widely used nitrogen fertilizer that simultaneously offers nitrogen and carbon while consuming CO2 during its synthesis. Conventional NH4HCO3 production relies on the Haber−Bosch process to generate NH3 followed by CO2 neutralization, resulting in high pressure operating conditions (400−500 °C, 100−200 bar). Herein, we present a cascade plasma-thermal catalytic route that converts N2, H2O, and CO2 into NH4HCO3 under atmospheric pressure. In this process, non-thermal plasma activates N2 and H2O to generate NO and H2, bypassing thermodynamic constraints. The plasma-derived NO is then hydrogenated over Pt/HZSM-5 with supplementary H2 from water electrolysis to produce NH3. Finally, simultaneous CO2 absorption leads to the in situ formation of NH4HCO3, achieving a yield rate of 114.5 mmol h–1 at a discharge current of 0.4 A. This integrated approach offers a pathway for nitrogen fertilizer synthesis from air and water, representing a step toward carbon−nitrogen cycle coupling.
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DOI
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2025
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IF 4.7
Lei-ting SHEN,Yu LIU,Juan-lang GUO,Qiu-sheng ZHOU,Tian-gui QI,Zhi-hong PENG,Gui-hua LIU,Xiao-bin LI
The leaching of sulfuric acid converted product of scheelite in NH 3 ·H 2 O−NH 4 HCO 3 solution was systemically studied to improve sulfuric acid conversion−ammonium salts leaching technology route for ammonium paratungstate production. The results showed that the WO 3 leaching efficiency was about 99% under optimal conditions of 350 r/min, liquid-to-solid ratio of 3 mL/g, 1 mol/L NH 4 HCO 3 , 4 mol/L NH 3 ·H 2 O, 25 °C, and 15 min. During the leaching, CaSO 4 almost had no change and was still in a banding or rod-like shape in short leaching time, while conglobate CaCO 3 was gradually formed on the CaSO 4 surface. A secondary reaction might occur between CaSO 4 and WO 4 2− , which could be restrained by a certain amount of CO 3 2− in the solution. There was no CaCO 3 phase determined by XRD in leaching residue of converted product for scheelite concentrate under optimal conditions, which was different from that for synthetic scheelite. The leaching process could be explained by neutralization reaction of H 2 WO 4 and solid transformation of CaSO 4 in NH 3 ·H 2 O−NH 4 HCO 3 solution.
研究领域:
冶金化学
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材料科学
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产品关联
DOI
高影响因子
ChemCatChem
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2017
·Vol. 9
·期 22
·4206-4211
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IF 4.803
Dong-Liang Wang,Huan Liu,Da Yang,Peng Wang,Yong Lu,Ye Liu
An efficient and clean protocol was developed for rapid production of primary aromatic amides by aminocarbonylation with NH 4 HCO 3 . Without addition of auxiliary base, the use of solid and cheap NH 4 HCO 3 dually as ammonia surrogate and base not only promoted aminocarbonylation over subsequent dehydration and hydrolysis of amides owing to its weak basicity, and it also made the reaction manipulation clean and simplified without the presence of stinky NH 3 or organic amines. The Xantphos ligand with relatively intensive π-acceptor character ( 1 J 31P–77Se =758 Hz) and wide natural bite angle ( β n =111°) was found to be indispensable for the high efficiency of this reaction. Graphical Double role for NH 4 HCO 3 : By using cheap and solid NH 4 HCO 3 dually as ammonia surrogate and base, a series of aryl halides were efficiently converted into the corresponding primary aromatic amides by means of aminocarbonylation over Xantphos-based Pd catalyst.
研究领域:
有机化学
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催化
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药物化学
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合成方法学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2018
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IF 5.091
Huan Yang,Yuwei Long,Hongxi Li,Shuang Pan,Hui Liu,Jidong Yang,Xiaoli Hu
In this work, the carbon dots (CDs) were synthesized by an one-pot portable hydrothermal method from sodium citrate and NH 4 HCO 3 . The obtained CDs were found to show high fluorescence quantum yield (31%), excitation-wavelength independence, outstanding water-soluble, excellent chemical and optical stability. Interestingly, it was discovered that sunset yellow (SY) was sensitive and effective in quenching the fluorescence of CDs. Based on this observation, CDs could be applied as a novel fluoescent probe for detection of SY. The analytical potential of this probe was evaluated and illustrated a good linear relationship at the concentration range from 0.25 to 56.0 μmol L −1 with a detection limit (3σ/k) of 74.49 nmol L −1 . Meanwhile, the practicality of this nanosensor for SY determination in real samples was validated with good accuracy and precision. In addtion, long time UV radiation and high ionic strength hardly influenced on the fluorescence intensity of CDs. However, the fluorescence intensity of CDs decreased at higher temperature and the fluorescence was recovered when temperature back to 5 °C. Therefore, CDs could be also employed as an fluorescent temperature sensor with significant sensitivity, linearity and remarkable reversibility.
研究领域:
分析化学
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纳米技术
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食品检测
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产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2024
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IF 15.8
Kun Wang,Mingze Gao,Juncheng Fan,Jingjing Huo,Pengxiang Liu,Rui Ding,Peng Li
Infection and aseptic loosening caused by bacteria and poor osseointegration remain serious challenges for orthopedic implants. The advanced surface modification of implants is an effective strategy for addressing these challenges. This study presents a “pneumatic nanocannon” coating for titanium orthopedic implants to achieve on-demand release of antibacterial and sustained release of osteogenic agents. SrTiO3 nanotubes (SrNT) were constructed on the surface of Ti implants as “cannon barrel,” the “cannonball” (antibiotic) and “propellant” (NH4HCO3) were codeposited into SrNT with assistance of mussel-inspired copolymerization of dopamine and subsequently sealed by a layer of polydopamine. The encapsulated NH4HCO3 within the nanotubes could be thermally decomposed into gases under near-infrared irradiation, propelling the on-demand delivery of antibiotics. This coating demonstrated significant efficacy in eliminating typical pathogenic bacteria both in planktonic and biofilm forms. Additionally, this coating exhibited a continuous release of strontium ions, which significantly enhanced the osteogenic differentiation of preosteoblasts. In an implant-associated infection rat model, this coating demonstrated substantial antibacterial efficiency (>99%) and significant promotion of osseointegration, along with alleviated postoperative inflammation. This pneumatic nanocannon coating presents a promising approach to achieving on-demand infection inhibition and sustained osseointegration enhancement for titanium orthopedic implants.
研究领域:
生物材料
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纳米技术
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骨科
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生物医学工程
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
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