JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 19
·e53836
·
IF 3
Jinlin Chen,Xiaodong Wen,Fang Xu,Shuangfei Xiang,Shujun Zhao,Feiya Fu,Xiangdong Liu,Ni Li
This study aims at developing novel methodology to prepare antibacterial cotton fabric with excellent antibacterial durability, and a “grafting through” approach was adopted to enhance affinity of Ag NPs with cotton fiber surfaces. The surface modification was carried out by covalently linking acrylic acid (AA) molecules onto the fibers, then 4-vinylpyridine was copolymerized with the AA moieties as a polymeric binder. Once the coordination bonds were formed between silver nanoparticles (Ag NPs) and the pyridine nitrogen, Ag NPs could be stably immobilized on the cotton fabric. Experimental results showed that the AA-co-PVP grafting copolymer had a significant regulatory effect on the dispersion and particle size of Ag particles, and the resulting cotton fabric presented a high antibacterial property with excellent durability. Even after 120 washing cycles, the bacterial reduction rates of the modified fabric against both Staphylococcus aureus and Escherichia coli retained a level higher than 99%. In addition, other textile attributes, such as vapor transmissibility, water absorbability and flexibility, could be largely retained in the modified fabrics.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2023
·
IF 3.3
Yawen Guan,Shanshan Fu,Wanyu Song,Xueyan Zhang,Bangyu Liu,Fang Zhang,Fang Chai
4-nitrophenol (4-NP) is a harmful aromatic compound to environment. The catalytic hydrogenation of 4-NP was considered as a profitable approach due to the valuable organic intermediate product. High efficiency catalysts are crucial. Herein, Cu–Au bimetallic nanospheres (BNSs) with sea urchin structure were fabricated by tuning the reaction condition and ratio of precursors. The Cu–Au BNSs exhibited effective catalytic activity in the reduction of 4-NP and K 3 [Fe(CN) 6 ]. The optimum catalyst can be determined as the Cu–Au BNSs prepared by 15 mL AA, 4-NP can be reduced to 4-AP in 150 s (k = 3.02 × 10 −2 s −1 ) with TOF value of 0.149 (s −1 ). The reusability of Cu–Au BNSs was evaluated with high effectiveness, the catalytic activity remained negligible loss over 18 cycles with efficiency over 95%, indicated their good reusability, which can be attributed to the synergistic effect of Cu–Au BNSs. The fabrication of bimetallic nanostructures provided an efficient approach to design efficient catalyst.
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Journal of Water Process Engineering
·
2023
·
IF 7
Xiying Zhu,Lijia Liu,Yudan Wang,Fuqiu Ma,Yao Tian,Hongxing Dong,Chunhong Zhang
An ideal adsorption material of uranium with not only a high adsorption capacity and high selectivity but also a broad applicability is required. In this study, a porous Fe(III) complex of phosphorylated hypercrosslinked calix[4]arenes (C4HP-Fe(III)) was synthesized. Anchoring Fe(III) via phosphate groups on phosphorylated, hypercrosslinked calix[4]arene (C4HP) significantly improved the uranium-adsorption performance, as evidenced by a 47.9 % increase in the uranium uptake (the adsorption capacity increased up to 497.6 mg·g −1 in a 60-mg·L −1 U solution). C4HP-Fe(III) is a promising adsorbent for uranyl extraction and exhibits fast capture kinetics (the adsorption capacity sharply increased in the first 30 min, which accounted for 86 % of the total amount of uranyl ions adsorbed). A study on the effect of pH on the uranium adsorption of C4HP-Fe(III) suggested that the adsorption capacity was higher than 300 mg·g −1 in the pH range of 5–10, even in a strongly acidic environment of pH 3–4, and it also had a specific adsorption capacity (≥ 168.2 mg·g −1 ). Furthermore, C4HP-Fe(III) possesses excellent ion selectivity for uranyl in simulated wastewater and simulated seawater, and the K d U can reach 4.1 × 10 3 mL·g −1 and 4.4 × 10 4 mL·g −1 , respectively. After 6 cycles, C4HP-Fe(III) maintained its original adsorption capacity of 92.2 %. This makes it useful for wide applications and can be used for capturing uranyl ions from industrial wastewater and natural seawater. The effective extraction of uranyl was mainly attributed to the chelation of uranyl ions with both phosphate groups and active hydroxyl groups (due to the introduction of Fe 3+ ).
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JOURNAL OF POLYMER SCIENCE
·
2023
·Vol. 61
·期 9
·842-851
·
IF 3.4
Zhoufeng Wang,Bolin Wang,Yingying Liu,Junwei Hu
A series of bisphenols, 4,4′-sulfobisphenol (BPS)/2,2-bis(4-hydroxyphenyl)butane (BPB) co-polyarylates with amorphous structures were synthesized from two BPS and BPB, and two different structures of benzoyl chloride monomers. The results of DFT calculations showed that the reaction activation energy of BPB with isophthaloyl chloride (IPC) and terephthaloyl chloride (TPC) was 8.05–8.40 Kcal/mol. The reaction activation energy of BPS with IPC and TPC was 38.73–39.09 Kcal/mol. GPC test results were consistent with theoretical calculations with BPS content from 0% to 15% resulting in a copolymer Mn of 22,000–11,600 and a Mw of 46,100–34,800. The intrinsic viscosity of co-polyarylates ranged from 0.55 to 0.71 dL/g. The glass transition temperature ( T g ) and 5% thermal weight loss of the co-polyarylates were 179.3–205.4 °C and 461.4–487.8 °C, respectively. Improved solubility of co-polyarylates in polar solvents. At the same time, the introduction of BPS did not result in any loss of mechanical properties, with Young's modulus in the range of 1444.32–1870.45 MPa, elongation at break in the range of 23.7%–30.8%, and tensile strength in the range of 52.21–59.38 MPa. Graphical
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OPTICAL MATERIALS
·
2023
·
IF 3.9
Shun Lu,Kegui Li,Ruojing Zhen,Maling Xiang,Xiaoyan Gan,Liling Guo,Hanxing Liu
Recently, perovskite solar cells (PSCs) basing on quasi-two-dimensional (quasi-2D) perovskites with hydrophobic bulky organic cations have received a lot of interests owing to their superior moisture stability. While quasi-2D perovskites have achieved great success in planar p-i-n PSCs, their application in planar n-i-p devices and the corresponding efficiencies lag far behind. In our work, (FPEA) 2 (MA) 4 Pb 5 I 16 perovskite films with high crystallinity , compact and smooth surface were deposited on electron transport layer with NH 4 SCN as an additive. Formamidinium (FA + ) were then incorporated into the FPEA based perovskite films to partially replace methylammonium (MA + ), and effects of FA + on the film's vertical orientation, light absorption capacity, carrier lifetime, defect density and electron mobility were studied. It was found that when molar ratio of FA/MA = 0.5/9.5, the film had the highest vertical orientation, enhanced light absorption, less carrier recombination loss. The obtained (FPEA) 2 (FA 0.05 MA 0.95 ) 4 Pb 5 I 16 based n-i-p PSCs gave a maximum efficiency of 12.17% under standard illumination, retaining 83% of the initial efficiency after stored in air environment (25–30 °C) with 40 ± 5% RH for 1080 h. The results demonstrate an efficient approach to prepare high-quality quasi-2D perovskite films in a n-i-p structure as well as improved device efficiency and stability.
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EUROPEAN POLYMER JOURNAL
·
2023
·
IF 6
Guofei Chen,Gang Xu,Yang Jiao,Yongmei Tang,Liyun Tan,Xingzhong Fang
Two series of transparent cardo polyimides (PIs) derived from bisphenol fluorenes and 1,4-bis(4-fluorophthalimide)cyclohexanes (BFCH) with different ratios of trans- and cis - 1,4-diaminocyclohexane were prepared via aromatic nucleophilic substitution. These PIs exhibited high glass transition temperatures ( T g s) of 271–352 °C, 5% weight loss temperatures ( T d 5% ) of 400–433 °C in nitrogen, mechanical properties of tensile strengths of 62–107 MPa, tensile moduli of 3.0–4.4 GPa and elongations at break of 1.7–4.5% and great solubility in a variety of organic solvents. These PI films appeared excellent optical transparency, which displayed the cut-off wavelengths from 323 to 355 nm and high transmittance at 450 nm with more than 85 %. The steric effects of different substituent groups on bisphenol fluorene and different ratios of trans / cis configuration were also investigated.
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Materials Today Energy
·
2023
·
IF 9.3
Taotao Hu,Hongming Hou,Jin Peng,Qiaofeng Wu,Jialong He,Hua Yu,Rui Liu,Tian Hou,Xiangqing Zhou,Meng Zhang,Xiaolong Zhang,Xinchun Yang,Yuanmiao Sun,Xuanhua Li,Yang Bai
NiO x plays a vital role in fabricating efficient and stable inverted perovskite solar cells (PSCs). However, the relatively low conductivity and inefficient hole extraction of NiO x hole transport layer (HTL) due to the low Ni 3+ /Ni 2+ ratio limit its use in high-efficiency PSCs. Here, we report a facile strategy to remarkably enhance the electrical conductivity and hole extraction capability of NiO x HTL by simply introducing the small molecule 4- tert -butylpyridine ( t BP) as additive in the NiO x precursor solution. It is revealed that the t BP efficient improves the charge selectivity of the NiO x interface, inducing the preferable p-type carrier concentration on the surface. Consequently, more oxygen is involved in the process of Ni 2+ to Ni 3+ conversion, and the resulting t BP: NiO x HTL exhibits significantly enhanced hole extraction and transport property. In addition, a thin layer of LiF is applied to passivate the surface of NiO x , which enables improved hole migration ability by the dipole effect of LiF and reduced trap state density of the surface. The inverted PSCs (0.16 cm 2 ) fabricated with t BP: NiO x HTL delivers an enhanced efficiency of 20.2% relative to the control devices (17.5%). t BP: NiO x devices with a large area of 1 cm 2 are also demonstrated, which achieve a decent efficiency of 16% with excellent long-term stability.
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Biosensors-Basel
·
2023
·Vol. 13
·期 12
·1024
·
IF 5.4
Yanju Wu,Keyu Chen,Fei Wang
In this study, a composite film was developed for the electrochemical sensing of tryptophan (Trp). Porous reduced graphene oxide (PrGO) was utilized as the electron transfer layer, and a C-undecylcalix[4]resorcinarene Langmuir–Blodgett (CUCR-LB) film served as the molecular recognition layer. Atomic force microscopy (AFM), transmission electron microscopy (TEM), Raman spectroscopy, scanning electron microscopy (SEM), and electrochemical experiments were employed to analyze the characteristics of the CUCR-LB/PrGO composite film. The electrochemical behavior of Trp on the CUCR-LB/PrGO composite film was investigated, revealing a Trp linear response range of 1.0 × 10−7to 3.0 × 10−5mol L−1and a detection limit of 3.0 × 10−8mol L−1. Furthermore, the developed electroanalytical method successfully determined Trp content in an amino acid injection sample. This study not only introduces a rapid and reliable electrochemical method for the determination of Trp but also presents a new strategy for constructing high-performance electrochemical sensing platforms.Keywords:Langmuir–Blodgett film;porous reduced graphene oxide;calix[4]arene;electrochemical sensing;tryptophan
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PubMed
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 37
·25828-25835
·
IF 3.9
Xia Xu,Liming Yang,Yanjun Cui,Bing Hu
The successful development of efficient and stable catalysts for 4-NP reduction reactions is beneficial to the environment and ecology. Fe3O4@Pt exhibits excellent catalytic performance for 4-NP reduction reaction due to the synergistic effect between Fe and Pt. But its structure and catalytic performance are extremely unstable. Here, we utilized the small-scale organic compound 2-hydroxyethylamine as surfactant to construct a stable composite nanomaterial. Then investigated the influence of monochromatic light (650 nm, 808 nm and 980 nm) and temperature on the kinetics of 4-NP reduction reaction by 2-hydroxyethylamine stabilized Fe3O4@Pt. The results indicate that both temperature and monochromatic light radiation can affect kinetic regulation. Increasing temperature can promote the catalytic rate, while monochromatic light radiation can induce agglomeration and inhibit the catalytic rate. This study opens up a new way for developing and regulating catalysts for heterogeneous catalysis reactions.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yongzhuo Yu,Wei Li,Huixing Yang,Qiuming Wei,Linlin Hou,Zhiliang Wu,Yangyang Jiang,Chaoyu Lv,Yuxin Huang,Jiyu Tang
The construction of heterojunction systems is an effective way to efficiently generate hydrogen by water photolysis. In this work, Ni-MOF (trimesic acid, (BTC)) and g-C 3 N 4 (denoted as CN) were combined, and then Ni-MOF/CN was modified by 4-Methyl-5-vinyl thiazole (denoted as MVTh). Finally, CdS was loaded on the surface of Ni-MOF/CN/MVTh to prepare the photocatalyst Ni-MOF/g-C 3 N 4 /MVTh/CdS (denoted as Ni/CN/M/Cd) with a triangular closed-loop path heterojunction for the first time. As a photocatalyst without precious metal cocatalysts, Ni/CN/M/Cd displayed high H 2 evolution (17.844 mmol·g −1 ·h −1 ) under an optimum CdS loading of 40 wt%. The H 2 evolution rate was approximately 79 times that of Ni-MOF/CN and exceeded those of almost all catalysts based on MOF/CN in the literature. The triangular closed-loop heterojunction formed between Ni-MOF, g-C 3 N 4 , and CdS could realize the directional migration of photocarriers and significantly diminished the transfer resistance of carriers. The Ni 2+ in Ni-MOF provided many cocatalytic sites for H 2 evolution via g-C 3 N 4 and CdS. Furthermore, charge carrier separation in Ni-MOF/CN/CdS improved after the innovative addition of MVTh. This study provides a reference for the construction of a closed-loop heterojunction system without precious metal cocatalysts.
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高影响因子
MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 10
·1-11
·
IF 6.408
Deng Gaoqiong,Chen Hengye,Shi Qiong,Ren Lixue,Liang Ke,Long Wanjun,Lan Wei,Han Xiaole,She Yuanbin,Fu Haiyan
A simple and sensitive colorimetric assay for detecting organophosphorus pesticides (OPs) was developed based on 3,3',5,5' -tetramethylbenzidine (TMB)/hydrogen peroxide (H 2 O 2 )/dodecyl trimethylammonium bromide (DTAB)-tetramethyl zinc (4-pyridinyl) porphyrin (ZnTPyP). In this system, based on the peroxidase-like activity of DTAB-ZnTPyP, H 2 O 2 decomposes to produce hydroxyl radicals, which oxidize TMB, resulting in blue oxidation products. The OPs (trichlorfon, dichlorvos, and thimet) were first combined with DTAB-ZnTPyP through electrostatic interactions. The OPs caused a decrease in the peroxidase-like activity of DTAB-ZnTPyP due to spatial site blocking. At the same time, π-interactions occurred between them, and these interactions also inhibited the oxidation of TMB (652 nm), thus making the detection of OPs possible. The limits of detection for trichlorfon, dichlorvos, and thimet were 0.25, 1.02, and 0.66 μg/L, respectively, and the corresponding linear ranges were 1–35, 5–45, and 1–40 μg/L, respectively. Moreover, the assay was successfully used to determine OPs in cabbage, apple, soil, and traditional Chinese medicine samples (the recovery ratios were 91.8–109.8%), showing a great promising potential for detecting OPs also in other complex samples.
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COMBUSTION AND FLAME
·
2022
·
IF 5.767
Hua Fang,Peng Deng,Rui Liu,Kehua Han,Pengfei Zhu,Jianxin Nie,Xueyong Guo
Metal hydride has been used as a potential energetic material due to its high hydrogen storage density, high reactivity, high mass calorific value and large gas production. But it was still a great challenge towards optimizing and enhancing the energy-releasing properties of metal hydride. In this work, a novel molecular perovskite energetic material (H 2 dabco)[NH 4 (ClO 4 ) 3 ] (DAP-4) was introduced as a high energy oxidant to fabricate metal hydride (MH 2 , M=Mg, Ti, and Zr) based energetic composites. The thermal decomposition, ignition and combustion characteristics of MH 2 -based energetic composites were studied. The results showed that molecular perovskite energetic material DAP-4 was beneficial as oxidant in MH 2 -based high-energy solid composites, which were originated from its high energy properties and strong oxidation capacity. The ignition and combustion reaction mechanisms of MH 2 with DAP-4 as oxidant were provided. This work offered an effective way to realize energy-releasing performance of MH 2 by molecular perovskite energetic materials introduced for their potential application.
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