CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Zhongwei Wang,Yan Qing,Zhu Liu,Shasha Wang,Yiqiang Wu,Shoulu Yang
In this work, we developed a new methodology for generating hybrid wood materials through the in-situ hybridization of phosphotungstic acid (HPW) and organic amines at ambient temperature. By selecting specific molecules of organic amines, this innovative process produces rod-like (imidazole) and spherical (triethylamine) amphiphilic organic-PW nanoparticles (NPs) with tunable particle sizes. The in-situ synthesis of organic-PW NPs within the wood was verified by series of methods for analysis. The resulting wood samples exhibited remarkable flame retardancy and smoke suppression, as demonstrated by successful fulfilment of the UL-94 test, a remarkable 60.1 % reduction in total smoke production, with a weight percent gain of only 7.5 %. Distinct profiles of the pyrolysis products were observed in the organic amine-PW-treated samples compared to pure wood, indicating a shift in the depolymerization pathway from levoglucosenone (LGO) to hydroxymethylfurfural (HMF) in the presence of acid catalyst. Notably, the thermal protection properties of imidazole-PW are higher than those of triethylamine-PW, attributed to the greater stability of cyclic phosphoric acid-imidazole complexes compared to linear phosphoric acid-triethylamine complexes. Our study not only presents an innovative approach to fabricate hybrid wood materials but also demonstrates exceptional flame-retardant and smoke-suppression capabilities, and altered pyrolysis pathways and evaluated intermediate products stability.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Weifeng Li,Tao Zhang,Li Lv,Yanxiao Chen,Wenxiang Tang,Shengwei Tang
A novel strategy of room-temperature synthesis of MIL-100(Fe) with organic amine as deprotonating agent was proposed. The as-prepared solid product was denoted as R-MIL-100(Fe). The material was systematically characterized via XRD , FT-IR, XPS and SEM. The effects of operation parameters such as initial fluoride concentration, reaction time, initial pH and co-existing anions on the fluoride adsorption performance of the synthesized R-MIL-100(Fe) were studied. The maximum fluoride adsorption capacity of R-MIL-100(Fe) was as high as 23.53 mg/g at 298 K in the fluoride solution. The results indicate that the adsorption process of fluorine on R-MIL-100(Fe) belongs to surface adsorption and intraparticle diffusion . An excellent fluoride adsorption performance of R-MIL-100(Fe) was observed in a wide pH range of 4–10. The co-existing anions including Cl - , NO 3 - and SO 4 2- almost had no negative effects on the adsorption performance of R-MIL-100(Fe). However, the present of CO 3 2- or HCO 3 - brought an obvious reduction of F - adsorption capacity of R-MIL-100(Fe). Thermodynamic study results illustrate that the adsorption process was an exothermic chemisorption . Chemical combination of iron and fluorine was confirmed by FT-IR and XPS. The strong combination brings the excellent F - adsorption performance of MIL-100(Fe). R-MIL-100(Fe) was successfully regenerated and recycled five cycles with an excellent regeneration ability and recyclability.
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
CRYSTALLOGRAPHY REPORTS
·
2018
·Vol. 63
·期 3
·433-437
·
IF 0.762
Long Ji-Ying,Yan Zhi-Shuo,Gong Yun
Using an organoamine, 2,5-bis (1-imidazoly) pyridine (L), a novel inorganic-organic hybrid material based on antimony halide formulated as {(CH 3 ) 2 L} 2+ {(Sb 4 Cl 8 I 8 ) 0.5 } 2– ( 1 ) was synthesized in situ via solvothermal technique and characterized by the single-crystal X-ray diffraction. During the synthesis, the organoamine L was transformed in situ into the imidazolium ion, {(CH 3 ) 2 L} 2+ . In the compound 1 , four Sb(III) ions are linked by two \({u_{{3^ - }}}\) I – and four u \({u_{{2^ - }}}\) I – ligands into a (Sb 4 I 8 Cl 8 ) 4– unit, in which eight Cl – ions and two I – ions act as the terminal ligands. The uncoordinated {(CH 3 ) 2 L} 2+ organoamine moieties are linked with the (Sb 4 I 8 Cl 8 ) 4– clusters via H bonds into three-dimensional (3D) supramolecular architecture. The band structure calculation shows that the compound has an indirect band gap of 2.253 eV.
研究领域:
材料化学
·
晶体学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2019
·
IF 2.584
Ruijie Yang,Kelin Song,Jiansheng He,Yingying Fan,Rongshu Zhu
In this work, the study of photocatalytic hydrogen production by RGO/ZnIn2S4 with simultaneous degradation of organic amines was carried out in the presence of organic amines in wastewater as the sacrificial agents. The effects of several factors, such as organic amine types, pH value, catalyst concentration, organic amine concentration, and sunlight source, on the photocatalytic activity of RGO/ZnIn2S4 for H2 production were investigated. At the same time, its performance of degrading organic amines during H2 production was also examined. The results showed that the order of H2 production activity of RGO/ZnIn2S4 in six organic amine solutions was N(CH2CH3)3 > N(HOCH2CH2)3 > N(CH3)3 > HO(CH2)2NH2 > C6H5–N2> CO(NH2)2, and the highest H2 production was in N(CH2CH3)3 (triethylamine) solution, being 1597 μmol·g–1·h–1, which is 2.6 times as high as that using the aqueous solution mixture of Na2S and Na2SO3 as the sacrificial agent. In addition, when the pH was 13, the catalyst concentration was 1.0 g·L–1, and the triethylamine concentration was 1.0 mol·L–1, the photocatalytic activity was the highest. Furthermore, the relationship between triethylamine concentration and H2 production was analyzed according to the theory of dynamics.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2024
·
IF 6.7
Zhenfeng Sun,Kaiqiang Zhao,Chen Wang,Jie Li,Haisheng Xu,Chao Yang
Presulfiding agents are widely used in oil refining and chemical industry, how to produce safe and efficient presulfiding agent by more environmentally friendly synthesis process are still problems to be solved. In this study, the organic polysulfide FSA-55 was synthesized by a practical one-pot process using isobutene and sulfur as raw materials and organic amine as a catalysts. The product components were analyzed and the possible catalytic reaction pathways in the thermal conversion of sulfides were elucidated. The amine catalysts showed a catalytic activities in inducing the ring opening of the cyclic molecular structure of sulfur at high temperature, thereby releasing the reactive sulfur radicals, which react with unsaturated double bonds through addition reactions. Different molecular structures of polysulfide were generated through molecular rearrangement and cyclization reactions. The suitability of the product as a presulfiding agent was investigated by analyzing the thermal properties and studying the presulfiding effect on hydrogenation catalysts. The polysulfide has a wide decomposition temperature range (100–260 °C), which can effectively avoid the occurrence of concentrated exothermic phenomena during presulfiding of hydrogenation catalysts. The presulfiding degree of the catalysts can reach 58.32%, which shows the great potential of oil processing as a presulfiding agent.
研究领域:
石油化工
·
催化化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 3
·期 6
·2609-2616
·
IF 0
Qingshan Zhao,Yuanzhi Zhu,Zhen Sun,Yang Li,Guoliang Zhang,Fengbao Zhang,Xiaobin Fan
In this study, we develop a facile strategy to combine an organic amine with a palladium complex on graphene oxide (GO) as a cooperative catalyst for Tsuji–Trost allylation. A tertiary amine and palladium–diamine complex are simultaneously immobilized on a GO support through silylation and further in situ coordination processes. PdCl2 is employed as the palladium precursor, with no necessity for extra coordination ligands. Various characterizations confirm the successful preparation of the cooperative supported catalyst (GO–NEt2–2N–Pd). Systematic investigation reveals the immobilized palladium–diamine complex (GO–2N–Pd) with very low Pd loading is effective for Tsuji–Trost allylation, and incorporation of the tertiary amine shows a significant promoting effect towards the catalytic activity. GO–NEt2–2N–Pd can be readily recovered and recycled several times without reduction of its efficiency. Its excellent performance should be ascribed to synergistic catalysis effect, excellent support properties, and robust immobilization interaction.
研究领域:
催化化学
·
材料科学
✓ 已验证
DOI
FIBERS AND POLYMERS
·
2021
·Vol. 22
·期 4
·936-941
·
IF 2.153
Chen Xin,Guo Junkang,Ren Limei,Ren Shenyong,Shen Baojian,Guo Qiaoxia
The flame-retardant finishing of cotton with pentaerythritol phosphate and small molecule organic amine, such as diethylenetriamine, triethylenetetramine, diethanolamine, or isopropanolamine, was studied. The mechanical and flame-retardant properties and thermal stability of cotton fabric before and after flame-retardant finishing were investigated. Results revealed that the longitudinal and latitudinal breaking strength increased. The limiting oxygen index increased from 18.7 % to 37.9–39.1 %. Vertical flame burning time and afterglow time decreased from 35.1 and 8.4 s, respectively, to 0 s. The damage length decreased from 30 cm to 7.1–8.4 cm. At 700 °C, the residual carbon increased from 17.69 % to 41.48–41.56 %. The experimental results show that the flame-retardant system has good flame retardant and carbonization effects on cotton and good foaming property for combustion. The experimental operation is simple, rapid, and has broad market prospects.
研究领域:
材料科学
·
纺织工程
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Xueni Shang,Chunlei Chen,Fanbin Meng,Zuolin Zhang,Mengjia Li,Deyu Gao,Cong Chen
The grain boundary defects of polycrystalline perovskite could induce severe carrier recombination loss to restrict the photovoltaic and stability advancement of perovskite-based solar cells (PSCs). Inserting fixed molar ratio organic cations spacers into halide perovskite slabs to reduce the dimension of the crystal structure is still limited in finding a compromise of efficiency and stability for the widened bandgap and increasing barriers for carrier transport. Here, we select a direct additive bridging engineering to introduce a rationally designed organic amine salt 1,4-Benzene diammonium iodide (BDAI 2 ) with ammonium group on both terminals of the benzene ring to passivate the grain boundary and interface defects of perovskite . Bridging diammonium could ameliorate the interface contact and achieve electrostatic interactions with negatively charged traps (such as uncoordinated I – , PbI 3 – , and methylammonium vacancies) to inhibit cation migration, reduce halogen ion vacancy, and then suppress trap-induced recombination in perovskite. As a result, the bridging diammonium could improve the power conversion efficiency (PCE) from 19.86% to 21.91%. This study highlights the importance of rational bridging diammonium for perovskite surface modification and passivation to boost photovoltaic performance and stability.
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
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Encheng Liu,Zhenzhen Wang,Zhonghua Sun,Zhihui Zhang,Mingyang He,Qun Chen,Junfeng Qian
The chemical microenvironment modulation of active sites holds promise for facilitating their catalytic performance. Herein, single-atom Ru anchored by ZrSBA-15 modified with diverse organic amine groups has been fabricated and enabled CO2 hydrogenation to produce formic acid (FA) under mild conditions. However, the reaction cannot be achieved without the modification of organic amines. The functional groups as the microenvironment around Ru active sites effectively regulated the activity, in which Ru encapsulated in ZrSBA-15 bearing –NH2 groups exhibited the highest activity, with turnover number (TON) and turnover frequency (TOF) values of 505 and 64 h–1, respectively. Both characterization and experimental results validated that the functional group manipulated the adsorption capacity of the reactant, the electronic state of Ru and hydrophilicity/hydrophobicity of the materials, and thus the catalytic performance.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Da Chen,Guangda Niu,Shiqiang Hao,Liubing Fan,Jing Zhao,Christopher Wolverton,Mengling Xia,Quanlin Liu
Halide double perovskites have attracted substantial attention for optoelectronic applications owing to their low toxicity and high stability. However, double perovskites have strict requirements in terms of the halide type, thus rendering many of their properties unchangeable, including the band gap, atomic number, and carrier transport. By introducing long-chain organic amines, the chloride site of double perovskites can be completely replaced by bromide. Using this strategy, two dimensions silver–indium–bromide double perovskites (PEA)4AgInBr8 and (i-BA)4AgInBr8 were successfully synthesized [(PEA)+ = C6H5(CH2)2NH3+, (i-BA)+ = CH(CH3)2CH2NH3+]. Density functional theory calculations and spectroscopy characterizations were performed to unveil the semiconducting behaviors and photoluminescence properties of the title compounds. Electrical characterization confirms their good carrier-transport property (μτ product: 2.0 × 10–3 cm2 V–1) and low dark current. Moreover, the presence of heavy atoms, together with the ultrastable baseline contributes to a high X-ray detection sensitivity (185 μC Gyair–1 cm–2), greater than that of most previous double-perovskite detectors. Our work lays the foundation for broadening the family of potential double perovskites, creating a new path for the realization of long-sought perovskites with low toxicity and high stability that retain good optoelectronic performance.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2013
·
IF 1.913
Dan Wang,Ping Yang,Yuanna Zhu
Fe 3 O 4 nanoparticles (NPs) have been synthesized by the thermal decomposition of iron oleate complex in 1-octadecene solutions using organic amines as stabilizers such as trioctylamine (TOA), oleylamine (OAm), and hexadecylamine (HDA). By optimizing preparation conditions such as temperature, time, and the concentration of reaction reagents, the NPs exhibited adjusted sizes and morphologies (spherical, truncated octahedral, cubic, and tetrahedral). Organic amines play an important role for the morphology of the NPs. For example, truncated octahedral shape was gradually changed into quasi-cubic shape if adding TOA in the reaction system for a long time. In contrast, spherical, cubic, and tetrahedral Fe 3 O 4 NPs were fabricated in the case of OAm used. Because of OAm used as a reducing agent, reaction temperature was decreased. HDA resulted in spherical Fe 3 O 4 NPs a large size. It is confirmed that organic amine molecules were bound on the surface of the NPs by measuring the Fourier transformation infrared spectroscopy of samples.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Yangtao Wu,Dongxu Qu,Lingjun Bu,Shumin Zhu,Shiqing Zhou
This study explored the risk of trichloronitromethane (TCNM) formation during chlorination of the nitrite-containing water after pre-chlorination and subsequent UV irradiation (i.e., the chlorine-UV process). The competitive reaction between amino acid (AA) and NO 2 − for chlorine produced organic chloramine and reduced the oxidation from NO 2 − to NO 3 − , resulting in a significant enhancement of TCNM in the presence of AA (>5.52 μg L −1 ) as compared to the absence of AA (0.42 μg L −1 ). The generation of HO • during UV photolysis of organic chloramines was confirmed. Among the process parameters, pre-chlorination time (from 5 min to 30 min) had no significant effect on TCNM formation; the highest TCNM formation occurred at pH 7 (from pH 6 to pH 8); prolonged UV irradiation time (from 5 min to 30 min) and increased chlorine to AA ratio (Cl 2 :AA) (from 1 to 3) decreased the TCNM formation. The hydroxylated, chlorinated and nitrosated products were detected. The quantum chemical calculation results indicated the attack of NO 2 • was more likely to occur at the meta and para positions of benzoic acid (BZA), because of the steric hindrance of the carboxylic group in BZA to the ortho position. Based on the results of the toxicity assessment, pre-chlorination with a higher chlorine dosage could be an effective method of controlling both TCNM formation and acute toxicity. Overall, the results of this study contributed to the understanding of the TCNM formation mechanism as well as optimizing the parameters of the chlorine-UV process to reduce the risk of TCNM formation.
研究领域:
环境科学
·
水处理工程
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）