OPTICAL MATERIALS
·
2022
·
IF 3.754
Yuanjie Wang,Tengfei Cao,Zhihuang Xu,Liwang Ye,Xinxin Zhuang
Organic-inorganic hybrid halides (OIHs) have attracted widespread attention because of their exceptional optoelectronic properties. In particular, Mn 2+ -based hybrid halides show intense green or red emission, which benefit from distinct d-d optical transition in Mn 2+ . This work deals with the dual-emission in two novel hybrid single-crystals (N-AEP)[MnCl 3 (H 2 O) 3 ] 2 ·Cl ( 1 ) and [(N-AEP) 2 MnCl 6 ]·2Cl ( 2 ) (N-AEP 3+ = C 6 H 18 N 3 3+ ). Luminescence properties studies indicate that the low-energy emission is assigned to the Mn 2+ -based octahedron , while the high-energy emission ascribes to the organic cation [N-AEP] 3+ . Inorganic polyhedron transformation ([MnCl 3 (H 2 O) 3 ] - to [MnCl 6 ] 4- ) increased the luminescent intensity, which benefited from the weaker nonradiative transition in [MnCl 6 ] 4- octahedron. Significantly, by finely adjusting the excitation wavelength, complex 2 showed tunable emission properties, realizing the transition from “warm” white light (0.40, 0.33) to “cold” white light (0.28, 0.28). This paper offers a new example on the effective design of dual-emission materials.
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ADVANCED POWDER TECHNOLOGY
·
2024
·
IF 4.2
Jiali Chen,Peng Gao,Jie Liu,Yimin Zhu
Scheelite and calcite was firstly separated by new depressant Poly(sodium 4-styrenesulfonate) (PSS) with NaOL system. The recovery of scheelite was 87.18 % and the recovery of calcite was 5.57 % in single flotation experiments, the recovery and grade of WO 3 was 70.53 % and 61.08 % respectively in artificial mixed ore flotation under the optimal conditions of 10 mg/L NaOL, 10 mg/L PSS and pH of 8. Contact angle measurements, atomic force microscope (AFM) analysis, zeta potential analysis, fourier transforming infrared spectra (FT-IR) analysis and X-ray photoelectron spectroscopy (XPS) analysis were performed to uncover the reaction mechanism. The results showed that PSS could not adsorbed on scheelite by chemical reaction, and PSS had no impact on the further adsorption of NaOL onto the scheelite surface. Therefore, scheelite could still keep a high recovery with PSS. However, PSS could be strongly adsorbed on calcite by chemisorption between the Ca site of calcite and O site of PSS, which increased the hydrophilia of calcite and imped the further adsorption of NaOL. Therefore, it could selectively depress the flotation of calcite.
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ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Zhenjun Zhao,Jingyi Chi,Zhang FangFang,Yinglin Song,Wenda Xv,Yan Li,Hui Shi
4-Octylphenol, a major environmental degradation product of alkylphenols (Aps) used in industry, is an endocrine-disrupting chemical with significant estrogenic activity. It is one of the most toxic Aps, poorly biodegradable in the environment, and can accumulate in organisms through the food chain, thereby affecting the male reproductive system. In this study, the effect of 4-octylphenol on male reproductive health was analyzed. Male pubertal mice were exposed to 4-octylphenol at doses of 0, 1, 10, and 100 mg/kg once daily for 28 days. Our findings indicated that pubertal exposure to 4-octylphenol has significant negative effects on the male reproductive system. Pubertal mice exposed to 4-octylphenol exhibited dose-dependent reproductive toxicity. In the medium- and high-dose groups, a significant reduction in testicular mass, structural damage to the seminiferous tubules, increased oxidative stress and apoptosis within the testicular tissue, and a decline in sperm quality were observed. Additionally, autophagy processes in the testicular tissue, germ cell proliferation, and meiotic processes are inhibited. Serum testosterone and estradiol levels decreased, whereas oxidative stress levels in the testes and spermatozoa increased. In contrast, the low-dose group showed only a reduction in body weight, a decrease in motile sperm count, and mild oxidative stress in the testes without significant pathological changes in Western blot experiments. These results indicate that 4-octylphenol exposure during puberty caused reproductive toxicity in male mice.
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PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Hao Dai,Ziyi Deng,Yanbo Zeng,Jian Zhang,Yiwen Yang,Qinyan Ma,Wenling Hu,Longhua Guo,Lei Li,Shulin Wan,Haiying Liu
A coumarin-based fluorescent molecularly imprinted poly (ionic liquid) (FL-MIPIL) was prepared using a new coumarin-based alkenyl fluorescent ionic liquid (coumarin-FL-IL) as the functional monomer, IL [V 2 C 4 (mim) 2 ][(PF 6 ) 2 ] and ethyleneglycol dimethacrylate as the cross-linkers, and 4-NP as the template molecule. The absolute quantum yields of coumarin-FL-IL and FL-MIPIL were 7.26 % and 30.66 %, respectively. As a result of the electron transfer between coumarin-FL-IL which contains amino groups and 4-NP bearing hydroxyl groups, FL-MIPIL fluorescence was effectively quenched by 4-NP. The prepared FL-MIPIL sensor can rapidly respond to 4-NP within 60 s. The FL-MIPIL sensor had good linear response to 4-NP from 0.001–7.5 μM and low detection limit of 0.5 nM (S/N = 3). The FL-MIPIL sensor exhibited high sensitivity and good selectivity for 4-NP. The outstanding performance of FL-MIPIL could be ascribed to high fluorescence intensity of FL-MIPIL without matrixes and more interactions between FL-MIPIL and 4-NP. The FL-MIPIL sensor has successfully applied to the determination of 4-NP in lake, rain and waste water samples, river sediment, soil and urine samples.
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PubMed
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CARBOHYDRATE POLYMERS
·
2012
·
IF 3.628
Yihao Luan,Jinming Zhang,Maosheng Zhan,Jin Wu,Jun Zhang,Jiasong He
Using 4-dimethylaminopyridine (DMAP) as the catalyst, highly efficient propionylation and butyralation of cellulose were successfully carried out in an ionic liquid 1-allyl-3-methylimidazolium chloride (AmimCl) under mild conditions. Cellulose propionate (CP) and cellulose butyrate (CB) with a degree of substitution (DS) in the range from 0.89 to 2.89 were synthesized within only 30 min at 30 °C. The DS values of the products could be well controlled just by molar ratio of acid anhydride/anhydroglucose unit (AGU). More interestingly, the conversions of acid anhydrides in both propionylation and butyralation were as high as above 90%, even 96%. Therefore, this work provides a facile and highly efficient way for the synthesis of cellulose esters CP and CB.
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DOI
PubMed
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
·
IF 15.7
Lin Jiuyang,Yu Zijian,Chen Tianci,Huang Junming,Chen Lianxin,Li Jiangjing,Li Xuewei,Huang Xiaolei,Luo Jianquan,Ang Elisa Yun Mei,Toh William,Wang Peng Cheng,Ng Teng Yong,Seo Dong Han,Zhao Shuaifei,Zhong Kuo,Xie Ming,Ye Wenyuan,Van der Bruggen Bart,Wan Yinhua
During the synthesis of dyes, desalination of high-salinity dye-containing waste liquor is a critical premise for high-quality, clean dye production. Conventional membrane processes, such as electrodialysis, nanofiltration and ultrafiltration, are inevitably subjected to serious membrane fouling, deteriorating the dye/salt fractionation efficacy. Integrating the technical merits of electrodialysis and pressure-driven membrane separation, we devise an electro-driven filtration process using a tight ultrafiltration membrane as alternative to conventional anion exchange membrane for rapid anion transfer, in view of dye desalination and purification. By employing a sub-4 nanometer tight ultrafiltration membrane as anion conducting membrane, the electro-driven filtration process achieves 98.15% desalination efficiency and 99.66% dye recovery for one-step fractionation of reactive dye and NaCl salt, markedly outperforming the system using commercial anion exchange membranes. Notably, the electro-driven filtration system displays a consistently high and stable fractionation performance for dyes and salts with unprecedentedly low membrane fouling through an eight-cycle continuous operation. Our results demonstrate that the electro-driven filtration process using nanoporous membranes as high-performance anion conducting membranes shows a critical potential in fractionation of organic dyes and inorganic salts, unlocking the proof of concept of nanoporous membranes in electro-driven application.
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PubMed
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MOLECULES
·
2016
·Vol. 21
·期 3
·299
·
IF 2.465
Bo Jin,Rongzong Zheng,Rufang Peng,Shijin Chu
Five new bis(3-hydroxy-4-pyridinone) tetradentate chelators were synthesized in this study. The structures of these tetradentate chelators were characterized by1H-NMR,13C-NMR, FT-IR, UV-vis, and mass spectral analyses. The binding abilities of these tetradentate chelators for uranyl ion at pH 7.4 were also determined by UV spectrophotometry in aqueous media. Results showed that the efficiencies of these chelating agents are dependent on the linker length. Ligand4bis the best chelator and suitable for further studies.Keywords:chelating agent;3-hydroxy-4-pyridinone;uranium;tetradentate chelator
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高影响因子
RSC Advances
·
2014
·Vol. 4
·期 48
·25440-25446
·
IF 3.708
Yanlin Ren,Guangyin Fan,Weidong Jiang,Bin Xu,Fuan Liu
Magnetic palladium/reduced graphene oxide nanocomposites (Pd/rGO-Fe3O4) were prepared by depositing Pd nanoparticles on an rGO-Fe3O4 magnetic support. The as-prepared nanocomposites were investigated as catalysts for the hydrodechlorination of 4-chlorophenol in the aqueous phase. The complete conversion of 4-chlorophenol (with a concentration as high as 2.5 g L−1) to phenol was obtained in a reaction time of 40 min at room temperature and balloon hydrogen pressure without any additives. The excellent catalytic activity of the Pd/rGO-Fe3O4 can be attributed to the small particle size of Pd, and an electron-deficient state of Pd in the catalyst as a result of the strong interaction between the active sites and the oxygen of the oxygen-containing groups on the rGO-Fe3O4 support.
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ACS Applied Nano Materials
·
2022
·
IF 6.14
Yali Liu,Hongliang Dong,Haowei Huang,Wei Zong,Yue-E Miao,Guanjie He,Ivan P. Parkin,Feili Lai,Tianxi Liu
Noble-metal nanoparticles are regarded as one of the most promising catalysts to reduce the organic pollutant 4-nitrophenol (4-NP). However, the inevitable agglomeration of noble-metal nanoparticles and their poor distributions in catalytic systems limit their performance. Here, we propose a strategy to encapsulate Au nanoparticles inside porous organic cages (POCs) of soluble RCC3 and stabilize the size of Au nanoparticles at ∼3.25 nm. Typically, the Au@RCC3 composite exhibits excellent 4-NP catalytic reduction performance, which is superior to the corresponding Au bulk catalyst and is also closely related to the size of Au nanoparticles. The normalized X-ray absorption near-edge structure (XANES) results indicate that the electron deficiency at the Au atoms in Au@RCC3 is due to the existence of the RCC3 cage, which is beneficial to accelerate the electron transfer from BH4– to 4-NP during the hydrogenation process. This is also shown by density functional theory (DFT), in which a low energy barrier of 1.03 eV exists for the Au12 cluster compared with 1.37 eV for the Au25 cluster. Therefore, the encapsulation of noble-metal nanoparticles with soluble POCs is an effective way to design and develop stable active catalysts rationally.
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Current Nanoscience
·
2020
·Vol. 16
·期 4
·617-624
·
IF 1.836
Feng Yao,Wang Ran,Yin Juanjuan,Zhan Fangke,Chen Kaiyue,Jiao Tifeng,Zhou Jingxin,Zhang Lexin,Peng Qiuming
Background: 4-nitrophenol (4-NP) is one of the pollutants in sewage and harmful to human health and the environment. Cu is a non-noble metal with catalytic reduction effect on nitro compounds, and has the advantages of simple preparation, abundant reserves, and low price. Carbon nanotubes
(CNT) are widely used for substrate due to their excellent mechanical stability and high surface area. In this study, a simple method to prepare CNT-Cu2O by controlling different reaction time was reported. The prepared nanocomposites were used to catalyze 4-NP. Methods: CNTs and CuCl2
solution were put into a beaker, and then ascorbic acid and NaOH were added while continuously stirring. The reaction was carried out for a sufficiently long period of time at 60°C. The prepared samples were dried in a vacuum at 50°C for 48 h after washing with ethyl alcohol and deionized
water. Results: Nanostructures of these composites were characterized by scanning electron microscope and transmission electron microscopy techniques, and the results at a magnification of 200 nanometers showed that Cu2O was distributed on the surface of the CNTs. In addition, X-ray diffraction
was performed to further confirm the formation of Cu2O nanoparticles. The results of ultraviolet spectrophotometry showed that the catalytic effect of the compound on 4-NP was obvious. Conclusions: CNTs acted as a huge template for loading Cu2O nanoparticles, which could improve the stability
and cycle performance of Cu2O. The formation of nanoparticles was greatly affected by temperature and the appropriate concentration, showing great reducibility for the 4-NP reduction reaction.
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DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 47
·17221-17229
·
IF 4.174
Peng Wang,Maierhaba Abudoureheman,Zhaohui Chen
The ternary thiophosphate PbPS3 was synthesized by a high-temperature solid-state reaction using PbS, P and S. Single-crystal X-ray diffraction analysis reveals that the compound crystallizes in the P21/c space group. It features a three-dimensional structure, which consists of [PbS8] hendecahedra and isolated ethane-like [P2S6]4− units. PbPS3 can be easily obtained by different methods and shows high air stability, which is beneficial to its chemical synthesis and large-sized crystal growth. The crystal structure, optical properties and electronic structure of PbPS3 have been researched by experimental methods and first-principles calculations. The results show that PbPS3 has a moderate bandgap (Eg. exp. = 2.60 eV) and birefringence (Δncal. = 0.094@1064 nm), as well as a wide transparent range. Furthermore, to better understand the origin of the birefringence, structure comparisons and theoretical calculations were carried out. With a relatively high physicochemical stability and easy synthesis, PbPS3 can be expected to be a prospective birefringent material.
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RSC Advances
·
2014
·Vol. 4
·期 90
·48931-48937
·
IF 3.708
Jianhua Qiu,Xuyang Zhou,Qianqian Mo,Fang Liu,Liping Jiang
Polymer brushes have been used as supports for the immobilization of Keggin-type polyoxometalates (POMs) catalysts on poly(vinylidene fluoride) (PVDF) membranes by electrostatic-assembly. The poly(4-vinylpyridine) (P4VP) polymers are effectively grafted from PVDF membranes via surface-initiated atom transfer radical polymerization with activators generated by electron transfer (SI-AGET ATRP), and the P4VP-grafted PVDF membranes are characterized via ATR-FTIR, XPS, SEM, and AFM. Subsequently, the quaternization of the P4VP brushes process creates a membrane with a positive charge. The pendant pyridine and pyridinium groups facilitate the electrostatic assembly of POMs onto the P4VP-grafted membrane, thereby fabricating a well-designed membrane with potential catalytic applications. Therefore, such systems are interesting candidates for the heterogenization of POMs onto polymer-grafted membranes.
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