JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 46
·期 10
·118295
·
IF 6.3
Zijing Hao,Jiaqing Zhao,Jinhong Li,Jianbo Gao
This study develops a new type of lightweight, high-strength porous cordierite ceramic with isolated spherical pore structures by using oil-in-water (O/W) emulsions stabilized by synthesized submicron cordierite platelets as precursors. The particle hydrophobicity required for oil-water interface stabilization originates from in-situ adsorption of short-chain amines on particle surfaces. The type of dispersed system formed via mechanical shearing depends on amine concentrations and alkyl chain lengths. While stable O/W emulsions are formed at higher amine concentrations, the threshold for complete emulsification decreases with increasing alkyl chain length. Increasing amine concentration improves emulsion viscosity and stability, ultimately reducing the average droplet size. The preferred orientations of cordierite platelets at the oil-water interface and in the continuous phase lead to strong multilayered pore walls and dense struts during sintering, endowing the 65%-porous ceramic bodies with a compressive strength tunable by pentylamine concentration and up to 69.2 MPa.
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Materials Today Chemistry
·
2024
·
IF 6.7
Zhizhu Yue,Yonghe Yu,Tianjun Hu,Ying Wang,Lulu Cao,Yanxia Zhang,Yuhong Chang,Linjuan Pei,Jianfeng Jia
The development of economical multiphase photocatalysts is a significant challenge in achieving large-scale industrialization. Rational catalyst design can help in achieving efficient, energy-saving, and green catalytic reactions, making it more feasible to screen potential catalyst candidates. In this paper, we have successfully developed a high-efficiency photocatalyst Cu-doped Cu 2 WO 4 (OH) 2 (CWOH-y, where y represents the molar ratio of copper tungsten source), which can catalyze the aerobic coupling reaction of amines to produce corresponding imines under visible light irradiation. N-benzylidenebenzylamine is synthesized under visible light at 25 °C with an 89 % yield. Under natural light at around 35 °C (mean light intensity of 50 mW/cm 2 ), 94 % of the benzylamine is converted, and 97 % of the product is N-benzylidenebenzylamine. The catalyst exhibits high efficiency due to the synergistic effect of doped Cu, Cu 2 WO 4 (OH) 2 , and visible light. This combination generates a significant amount of superoxide free radicals and singlet oxygen when exposed to visible light. Furthermore, the catalyst demonstrates universality and stability with a wide range of amine derivatives. This study introduces a new environmentally friendly photocatalytic pathway for the synthesis of imines and emphasizes the potential applications of Cu 2 WO 4 (OH) 2 .
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CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Na Li,Hongying Wanyan,Shengchang Lu,He Xiao,Min Zhang,Kai Liu,Xiuliang Li,Bihui Du,Liulian Huang,Lihui Chen,Yonghao Ni,Hui Wu
Liquid marbles, as particle-armored droplets, have potential applications in microreactors, biomedicine , controlled release and gas detection. To improve the stability and biocompatibility of marble, biocompatible cellulose acetate particles and 3-allyloxy-2-hydroxy-propyl-cellulose (AHP-cellulose) were used to fabricate robust cellulose-based liquid marbles with excellent stability. Liquid marble was gelled into hydrogel marble via blue-light-irradiated polymerization of AHP-cellulose. The mechanical properties of cellulose-based hydrogel marble are superior to those of liquid marble. The rupture height of liquid marble is 10.5 m, which is 420 times greater than that of water marble (0.025 m). Surprisingly, the hydrogel marble with a 3 % AHP-cellulose concentration remained intact even after being dropped from a height of 50 m, which is comparable with the ability of a leather ball to withstand larger impact. When released from a height of 60 mm, hydrogel marble bounced to approximately 25.5 mm, 881 % higher than liquid marble (2.6 mm). Hydrogel marble exhibited long-lasting stability and was capable of monitoring ammonia with a detection limit of 365.2 mg/m 3 . The biocompatible cellulose-based hydrogel marble with excellent mechanical stability and reusability detection has great potential in chemical and environmental engineering as gas sensors.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Peng Liu,Xiaowei Wu,Suyi Pan,Jiamin Dai,Zixuan Zhang,Xuetao Guo
Wastewater treatment plants (WWTPs) are the important source of microplastics (MPs) in the environment, and disinfection processes bear high potential to degrade MPs. This study investigated the physicochemical degradation, dissolved organic products and interaction with co-existed pollutants (heavy metal and pharmaceutical) on polyethylene (PE), polypropylene (PP) and polystyrene (PS) MPs during simulated disinfection processes. Compared to photo or chlorination, photochlorination significantly resulted in the physicochemical degradation, including morphology alteration, fragmentation, and chemical oxidation on PP and PS MPs, but showed relatively low effect on PE, indicating the different resistance among polymers to disinfected treatment. Photochlorination also caused the formation of chain-scission organic compounds and even chlorinated products from MPs (e.g. C 11 H 19 O 4 Cl for PP and monochlorophenol, dichlorophenol, chloroacetophenone and chlorobenzoic acid for PS), which may form disinfection byproducts to induce healthy risk. The adsorption potentials of MPs for Cr(VI) or amlodipine were enhanced by photochlorination since the cracking and formed oxygen functional groups enhanced the pore filling and surface precipitation of Cr(VI), and the electrostatic attraction and hydrogen bonding with amlodipine. The findings indicated the physicochemical degradation of MPs and the combined pollution with co-existed pollutants, highlighting the health risks of MP-derived organic products during the disinfection treatments (even in normal dosage) in WWTPs.
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CHEMOSPHERE
·
2021
·
IF 7.086
Peng Liu,Xiaowei Wu,Huanhuan Shi,Hanyu Wang,Hexinyue Huang,Yanqi Shi,Shixiang Gao
Microplastics (MPs) in the environment would undergo extensive weathering, which can act as a vector affecting the accumulation of pollutants in organisms. However, the risk of organic pollutants adsorbed on aged MPs to marine organisms is poorly understood. This study revealed the contribution of aged polystyrene (PS) MPs to the total bioaccumulation of atorvastatin (ATV) and amlodipine (AML), and assessed the environmental risks via experimental and model analysis. The results showed that pharmaceuticals were more easily released in gastrointestinal fluids from aged MPs relative to that in simulated seawater. The hydrophobic pharmaceuticals were more bioaccessible than hydrophilic ones by organisms. Model analysis showed that ingestion of water and food were the most important uptake routes for pharmaceuticals in marine fish and seabirds, while aged PS MPs could decrease the bioaccumulation of pharmaceuticals (contributed for −2.9% and −1.2% for the total uptake of ATV, and −25.8% and −4.4% for AML), indicating the cleaning effect of aged MPs, and the potential higher exposure risks of pharmaceuticals in warm-blooded organisms than that in cold-blooded ones via ingested MPs. The study revealed the effect of aged MPs to the bioaccumulation of pharmaceuticals in marine organisms, and highlighted the combined risks of aged MPs and pharmaceuticals in the environment.
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MACROMOLECULES
·
2021
·
IF 5.985
Zhi Rong Ou,Wei Li Peng,Min Zhi Rong,Ming Qiu Zhang
A novel strategy for controllable depolymerization and recovery of polymer blends is proposed. The core advance lies in the application of reversible boronic ester bonds and imine bonds, which possess the abilities of correlative scission and rebuilding. Accordingly, reversibly interlocked polymer networks (RILNs) are prepared from two preformed crosslinked polymers, which respectively carry the two reversible bonds. By taking advantage of the intimate packing of the macromolecules from the two networks in the RILNs, the cascading effect between boronic ester bonds and imine bonds is enabled. When the dimethylformamide swollen RILNs are triggered by a little water, the boronic ester bonds in one component network are decomposed, affording boronic acid, which subsequently catalyzes the cleavage of the adjacent imine bonds in the other component network. Meanwhile, scission of the imine bonds also promotes decomposition of the boronic ester bonds as well. The cascading processes can be reversed via dehydration-induced reformation of boronic ester bonds. Hence, RILNs are allowed to be depolymerized in a controlled manner and then recovered by removing the solvent and water.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2021
·Vol. 35
·期 8
·e6280
·
IF 4.105
Jinzhong Guo,Zhuming Guo,Zhiyin Xiao,Jing Jin,Xiuqin Yang,Yi He,Xiaoming Liu
Four new monoiron (II) tricarbonyl complexes with the amine bound, fac -[Fe(CO) 3 I 2 (NH 2 R)] (R = Et, 1 ; n Pr, 2 ; n Bu, 3 ; n Pent, 4 ), were reported using cis -[Fe(CO) 4 I 2 ] as the precursor. All the complexes 1 – 4 were structurally confirmed by various techniques such as ultraviolet–visible (UV–vis), Fourier transform infrared (FTIR), and nuclear magnetic resonance (NMR) spectra and elemental analysis of which complexes 1 and 2 are crystallographically determined. The reaction of the precursor with alkylamines proceeded in two main parallel pathways to form both aminium salts of fac -[Fe(CO) 3 I 3 ] − and the amine-bound complexes ( 1 – 4 ). Their dominances altered with the reaction time. These complexes in DMSO undergo quick decomposition with complex 1 as the relatively most stable one ( t 1/2 = 7.3 min) although they are stable in solid status. Unlike the triiodo anion and pyridinyl analogs showing severe cytotoxicity due to the generation of iodine radical during the decomposition, no iodine radicals were detected from the fac -[Fe(CO) 3 I 2 (NH 2 R)] complexes. Therefore, the cell viability of RT112 cells was not affected by the presence of the amine-bound iron complex ( 1 ) up to 100 μmol L −1 .
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2020
·
IF 4.192
Shichao Xu,Xiaojing Zeng,Songlin Dai,Jing Wang,Yuxiang Chen,Jie Song,Yunfei Shi,Xian Cheng,Shengliang Liao,Zhendong Zhao
In this study, we will report on the synthesis and application of efficient botanical agrochemicals from turpentine for sustainable crop protection. Two series of turpentine derived secondary amines were synthesized and identified by FT-IR, 1H NMR, 13C NMR, and HRMS. The herbicidal activities against Echinochloa crus-galli were evaluated. The potential toxicity of the synthesized compounds was tested by MTT cytotoxicity analysis. The effect of structure of the synthesized secondary amines and corresponding Schiff base compounds on their activities was investigated by quantitative structure–activity relationship (QSAR) study. All target products were found to be low toxicity, with similar or higher herbicidal activities than commercial herbicides diuron and Glyphosate. Results of QSAR study showed that a best four-descriptor QSAR model with R2 of 0.880 and Rloo2 of 0.818 was obtained. The four descriptors most relevant to the herbicidal activities are the min valency of a N atom, the max total interaction for a C−H bond, the relative number of aromatic bonds, and the min partial charge (Qmin).
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LANGMUIR
·
2021
·
IF 3.882
Shiyu Wu,Yufu Yi,Shengliang Liao,Hongyan Si,Yuling Yang,Guorong Fan,Peng Wang
We described the comprehensive synthesis, characterization, and catalytic performance of a novel type of the ordered cubic Ia3̅d supermicroporous silicas by using tetraethyl orthosilicate as a silicon source and a hydroxyl-functionalized quaternary ammonium salt as a template under alkali conditions. The effects of various reaction conditions on the pore structure and morphology of the silica materials were thoroughly investigated. Our results showed that under a wide range of reaction conditions, supermicroporous silicas with a highly ordered cubic Ia3̅d structure can be produced with a large BET specific surface area of 1741 m2/g, high pore volume of 0.91 cm3/g, concentrated pore size at 19.1 Å, and crystalline morphology. After Al doping, the obtained aluminosilicates preserved a highly ordered cubic supermicroporous structure. By using the H-form aluminosilicates as catalysts, we selectively dimerized β-pinene. The catalysts exhibited an excellent catalytic activity for β-pinene dimerization with a conversion yield up to 100%. Compared with conventional mesoporous H-form Al-MCM-48 catalysts, the prepared supermicroporous catalysts exhibited superior catalytic performance due to their excellent shape-selective properties, producing the β-pinene dimer in a yield up to 72.4% with dimer/oligomer ratios in the range of 7.5–10.1. This study featured a detailed preparation and characterization of supermicroporous silica with novel microstructures and showed its utility in catalytic dimerization.
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Journal of Materials Chemistry C
·
2020
·Vol. 9
·期 4
·1303-1309
·
IF 7.059
Wantian Yang,Jiarui Hu,Jian Chen,Yaxin Xu,Guoliang Tong,Haotian Fan,Xingchen Chai,Junnian Chen,Yunbin He
Two-dimensional diamine-based perovskites are now attracting intense interest due to their enhanced ambient stability as compared to monoamine-based perovskites. Few reports to date have focused on the fundamental morphology of diamine-based perovskite single crystals and related this to their electrical properties and the further photoconductivity behaviors. Herein, we systematically investigated pentamethylenediammonium lead bromide (PDAPbBr4) and pentylammonium lead bromide (PA2PbBr4) perovskite single crystals, and explored how their morphology and structure characteristics affected their electrical properties and photodetecting performances. Notably, PDAPbBr4 perovskite exhibited distinctive smooth and continuous morphology, quite different from the rough and discontinuous morphology of PA2PbBr4 perovskite. Besides, the single organic interlayer spacer in PDAPbBr4 perovskite induced an orderly arrangement of inorganic sheets and decreased interlayer distance. With smooth, continuous morphology and shortened interlayer distance, PDAPbBr4 perovskite exhibited lower defect density and higher electrical conductivity than PA2PbBr4 perovskite. Importantly, a PDAPbBr4-based photodetector produced a responsivity of 7.92 mA W−1, a photocurrent on/off ratio of 246, and response time of 31 ms, which outperformed a PA2PbBr4-based photodetector by 387 times in responsivity, 27 times in on/off ratio, and 10 times in response time. The findings might provide a foundation for understanding the morphology characteristics of 2D perovskites and the effects on their optoelectronic performance.
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JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Peng Liu,Xiaowei Wu,Haiyong Liu,Hanyu Wang,Kun Lu,Shixiang Gao
Microplastics (MPs) in the environment usually undergo extensive weathering and can transport pollutants to organisms once being ingested. However, the transportation mechanism and effect of aging process are poorly understood. This study systematically investigated the desorption mechanisms of pharmaceuticals from pristine and aged polystyrene (PS) MPs under simulated gastric and intestinal conditions of marine organisms. Results showed that the increased desorption in stomach mainly depended on the solubilization of pepsin to pharmaceuticals and the competition for sorption sites on MPs via π-π and hydrophobic interactions. However, high desorption in gut relied on the solubilization of intestinal components (i.e. bovine serum albumin (BSA) and bile salts (NaT)) and the competitive sorption of NaT since the enhanced solubility increased the partition of pharmaceuticals in aqueous phase. Aging process suppressed the desorption of pharmaceuticals because aging decreased hydrophobic and π-π interactions but increased electrostatic interaction between aged MPs and pharmaceuticals, which became less affected by gastrointestinal components. Risk assessment indicated that the MP-associated pharmaceuticals posed low risks to organisms, and warm-blooded organisms suffered relatively higher risks than cold-blooded ones. This study reveals important information to understand the ecological risks of co-existed MPs and pollutants in the environment.
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Catalysis Science & Technology
·
2019
·Vol. 10
·期 2
·440-449
·
IF 5.726
Pengqi Zhu,Jin Zhang,Jie Wang,Peng Kong,Yunwei Wang,Zhanfeng Zheng
Hydroxyl coordinated ruthenium dispersed on the surface of γ-Al2O3 can be applied to the selective oxidation of amines with light irradiation and an atmospheric pressure of O2 at room temperature. Sunlight is also an effective light source for the selective aerobic oxidation of primary amines to corresponding nitriles. The high photocatalytic activity and selectivity over Ru/γ-Al2O3 originate from the adsorption of amines and imine intermediates on the abundant surface OH groups of the photocatalyst and further formation of Ru–amide species by ligand exchange of adsorbed amines and imine intermediates with adjacent exposed active Ru sites. Light is introduced to the system successfully via the formation of Ru–amide species, which are used as the light absorption sites of the photocatalytic selective oxidation of amines. Primary amines are directly converted to corresponding nitriles via a two-step oxidative dehydrogenation process.
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