MOLECULES
·
2021
·Vol. 26
·期 13
·3999
·
IF 4.412
Huiyuan Luo,Fuping Dong,Qian Wang,Yihang Li,Yuzhu Xiong
The performance of hydrogels prepared with traditional natural starch as raw materials is considerable; the fixed ratio of amylose/amylopectin significantly limits the improvement of hydrogel structure and performance. In this paper, starch hydrogels were prepared by physical blending and chemical grafting, with the aid of ultrasonic heating. The effects of different amylose/amylopectin ratios on the microstructure and water retention properties of starch hydrogels were studied. The results show that an increase in amylopectin content is beneficial to improve the grafting ratio of acrylamide (AM). The interaction between the AM grafted on amylopectin and amylose molecules through hydrogen bonding increases the pores of the gel network and thins the pore walls. When the amylopectin content was 70%, the water absorption (swelling 45.25 times) and water retention performance (16 days water retention rate 44.17%) were optimal. This study provides new insights into the preparation of starch-based hydrogels with excellent physical and chemical properties.Keywords:ultrasonic chemistry;hydrogel;starch;porous structure;water-retaining
研究领域:
材料科学
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Haohao Chen,Mingxuan Sun,Junjie Zhao,Xiangzhi Huang,Huanying Teng,Yu Gao,Ziyang Li,Jun Li
Herein, a collection of novel N-Ti 3 C 2 /BiOCl x Br 1−x composites are fabricated via a simple in-situ sonochemical process. Not only the preparation method for N-Ti 3 C 2 but also the photocatalytic system of N-Ti 3 C 2 /BiOCl x Br 1−x are firstly developed. Multiple characterizations jointly demonstrate the successful fabrication of the composites. Compared to that of BiOCl x Br 1−x , the maximum improvements of 1.16, 1.25 and 1.26 folds are severally confirmed for the photocatalytic degradation of levofloxacin, Rhodamine B, and methylene blue over N-Ti 3 C 2 /BiOCl x Br 1−x composites. In addition, through radicals trapping tests, the primary active species in photocatalytic degradation process are verified to be O 2 − . Moreover, N-Ti 3 C 2 /BiOCl x Br 1−x composites also exhibit 1.18 and 1.14 times enhancements for NH 3 production compared with that of BiOCl x Br 1−x with or without the presence of methanol, respectively. In addition, the maximum improvements of photo-current and photo-potential for BiOCl x Br 1−x are 1.29 and 1.86 folds with the introduction of N-Ti 3 C 2 , respectively. The enhanced photocatalytic activity of N-Ti 3 C 2 /BiOCl x Br 1−x composites is owing to the heightened light absorption, increased specific surface area, and accelerated separation of photoinduced carriers. Additionally, the stable photocatalytic properties of N-Ti 3 C 2 /BiOCl x Br 1−x are confirmed by three photocatalytic recycle tests on pollutant degradation and nitrogen reduction combined with X-ray diffraction patterns before and after three recycles. This study suggests that N-Ti 3 C 2 is an efficient ornamentation for boosting photocatalytic activity of BiOCl x Br 1−x , which can also be expanded as a promising modifier for other semiconductors.
研究领域:
材料科学
·
环境科学
·
光催化技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Huanyu Zhou,Xiaolian Jiang,Qing Han,Minghui Qiu,Xiaowei Da,Xianfu Chen,Yiqun Fan
To achieve precise separation of bioactive molecules, an innovative strategy combining sonochemistry and in-situ ion assistance process was proposed to fabricate CeO 2 mesopore membranes with narrow pore size around 3.7 nm. Under the ultrasound cavitation, the precursors and the precipitants react uniformly at molecular scale. The residual appropriate in-situ ions dispersed around the cluster form a double electric layer, thereby enhancing the stability of the sol. During sintering, ions between the clusters generate CeO 2 , reinforcing particle neck connections while the confined space between particles restricts further CeO 2 particle growth. The resulting CeO 2 membranes possess characteristics of a single fluorite phase, high crystallinity, and narrow pore size distribution. The optimal membrane thickness of 380 nm could be formed by a 2x dilution of sol and a 30-second coating time, exhibiting a complete structure with no obvious defects. The membrane achieved a molecular weight cut-off (MWCO) of ∼4300 Da, a pure water permeance of 61 L·m -2 ·h -1 ·bar -1 , an average pore size of 3.7 nm and a roughness of 3.4 nm. In chitosan oligosaccharides (COS) preparation using cellulase, the CeO 2 membranes demonstrated 100% cellulase retention and ∼50% transmission of COS with the degree of polymerization (DP) ranging from 2 to 5, thus achieving precise separation.
研究领域:
材料科学
·
生物分离工程
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2020
·Vol. 221
·期 11
·2000071
·
IF 2.335
Xiuxiu Wang,Nan Zhao,Ban Qin,Jiaojiao Xu,Wenlong Yang,Chensha Li,Liguo Sun,Jianqi Zhang
For the first time, an ultrasonics sonochemistry method is developed to promote the one-pot hydrosilylation polyaddition polymerization and crosslinking reaction in the preparation of polysiloxane main-chain liquid-crystalline elastomers (MC-LCEs). Due to the extraordinary effect of acoustic cavitation, the polyaddition polymerization and crosslinking reaction can be successfully carried out in an ordinary laboratory ultrasonic cleaner at room temperature, and generates the LCE matrix network in about 30 min. The prepared MC-LCEs demonstrate good quality, good properties, and stimuli-actuation performances. Compared to the traditional thermal processing methods for preparing polysiloxane MC-LCEs, this method exhibits superior properties rapidly, with high convenience and efficiency, and can be a path for batch fabrication at low cost. The work also demonstrates that the ultrasonics sonochemistry method is effective in generating linear main-chain liquid crystal polymers through hydrosilylation polyaddition and polysiloxane side-chain LCE matrix through hydrosilylation crosslinking reaction, thus confirming the high availability of ultrasonics sonochemistry in the processes of hydrosilylation polymerization, crosslinking reactions, or synchronous polymerization and crosslinking reactions.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2016
·
IF 4.556
Ling-Xia Zuo,Li-Ping Jiang,E.S. Abdel-Halim,Jun-Jie Zhu
Porous MnO 2 as a non-noble metal oxygen reduction reaction (ORR) electrocatalyst was prepared by a simple sonochemical route. The as-prepared porous MnO 2 exhibited higher electrocatalytic activity , superior stability and better methanol tolerance than commercial Pt/C catalyst in alkaline media. Furthermore, the ORR proceeded via a nearly four-electron pathway. Cyclic voltammetry (CV) and rotating-disk electrode (RDE) measurements verified that the ORR enhancement was attributed to the porous structure and good dispersity, which facilitated sufficient transport of ions, electrons, O 2 and other reactants in the process of ORR. The results indicated that a facile and feasible sonochemical route could be used to prepare highly active porous MnO 2 electrocatalyst for ORR, which might be promising for direct methanol fuel cells.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Applied Catalysis O: Open
·
2024
·
IF 0
Xue Zhang,Baowei Zhao,Yetong Liu,Min Yao,Yanjuan Li,Nan Wu
Sonochemistry was used to improve the degradation performance of trace antibiotics in water by the adsorption-catalytic oxidation system composed of Nitrogen-doped cyclodextrin reduced graphene oxide (N-β-rGO) and peroxymonosulfate (PMS). The results indicated that after loading ultrasound, >90% of antibiotics such as SMZ, LVX, CLI, TC, PEN, and CHL were removed within 10 min. Increasing the sound intensity, raising the system temperature, and increasing the initial PMS concentration all improved the strengthening effect. Among them, the removal rate was enhanced by >10% under low pH conditions. Moreover, the calculated enhancement factor of ultrasound enhancement was >1.30. The magnitude of the enhancement effect was correlated with the logP of antibiotics.
研究领域:
环境科学
·
水处理技术
·
材料化学
✓ 已验证
DOI
POLYMER
·
2024
·
IF 4.1
Xin Wang,Haoran Pei,Jun Li,Yinghong Chen
The black phosphorus (BP), which receives the increasing attention in polymer flame retardancy, has been greatly restricted due to its extremely easy oxidation in air. Herein, a simple efficient and green sonochemical method was accordingly proposed to realize the exfoliation and preparation of BP with enhanced air stability by utilizing the electrostatic self-assembly strategy in the presence of cation polymer poly(ethylene imine) (PEI) modifier. In addition, the prepared PEI modified BP nanosheets (FLBP@PEI) was further applied as the flame retardant fillers to improve the dispersion, thermal stability and flame retardancy of thermoplastic polyurethane (TPU). The results show that the sonochemical approach proves to be feasible in preparation of the modified BP. The incorporated PEI chains could not only improve the air stability of the BP by forming a coating, but also promote the dispersion of the BP nanosheets in the composites. Incorporation of only 2 wt% loading of FLBP@PEI could impart an excellent flame retardancy to the filled TPU composite, e.g., compared with pure TPU, the peak heat release rate (PHRR) and total heat release (THR) of the composite decrease by 59.2% and 26.2%, respectively. Finally, a possible flame-retarding mechanism of FLBP@PEI for TPU was proposed. During material burning, in the condensed phase, the resultant BP could act as a barrier and catalyze TPU to form the stable char residues, while in the vapor phase, the generated inert small molecules of NH 3 and H 2 O from PEI and TPU and P-containing free radicals could also prevent and delay the combustion propagation.
研究领域:
材料科学
·
聚合物化学
·
燃烧与防火
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Anran Zhang,Yang Guo,Hao Xie,Yangping Zhang,Yunzhi Fu,Changqing Ye,Yukou Du,Mingshan Zhu
The application of graphite carbon nitride photocatalysts is hampered by their low specific surface areas, few active sites, and low photogenerated electron-hole transfer rates. Here, we report a green and controllable strategy for synthesizing kelp-like carbon nitride nanosheets through self-assembled materials prepared from melamine and trithiocyanuric acid using sonochemistry. The prepared carbon nitride nanosheets showed superior and long-lasting photocatalytic activity in hydrogen evolution and the degradation of tetracycline hydrochloride. The significantly enhanced photocatalytic performance of carbon nitride nanosheets is attributed to the curled porous nanosheet structure and the appropriate amount of O-doping. This work provides a new design strategy for preparing shape-controlled carbon nitride catalysts via a green, fast, sonochemically mediated self-assembly approach.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2023
·Vol. 16
·期 6
·3024-3033
·
IF 6.7
Ruowen Zhao,Yupu Zhang,Fangli Wu,Jianyuan Wang,Fang Chen,Wei Zhai
Integration of oxygen vacancies (Vo) into nanostructured semiconductor-based photocatalysts has been recognized as a promising strategy for enhancing the performance of photoelectrochemical (PEC) water splitting. However, precisely controlling the Vo concentration in photocatalysts via an effective and tunable approach remains challenging. Herein, a series of optimized bismuth tungstate (Bi2WO6) nanosheet-based photoanodes with varying concentrations of Vo were prepared by a sonochemical method with in situ cavitation detection, which enables accurate manipulation of the acoustic cavitation intensity applied to the surface of Bi2WO6 photoanodes in alkaline solution. Based on the analysis of the Vo concentration and sound field characteristics, the mechanism of sonochemical regulation of Vo in Bi2WO6 nanosheets was interpreted. Specifically, the increase in Vo concentration can be attributed to the enhancement of Bi–O bond dissociation. This enhancement is influenced not only by the intensified impact of shear force and the generation of active radicals by transient cavitation, but also by the accelerated diffusion of the reactant, a result of stable cavitation. By optimizing the transient and stable cavitation intensity, a Vo-rich Bi2WO6 photoanode was obtained without altering the microstructure of Bi2WO6 nanosheets. The presence of high concentration Vo facilitates the interfacial chemical reactivity and the transmission of photogenerated carriers, leading to the drastic promotion of the PEC water splitting performance. The transient photocurrent density of the Vo-rich Bi2WO6 photoanode reaches 69.2 μA cm−2 (1.23 V vs. RHE), 7.86 times that of the untreated Bi2WO6 photoanode. Additionally, the charge injection efficiency increases to 35.4%. This work provides a controllable and effective method for defect engineering of nanostructured semiconductor-based electrodes.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESALINATION
·
2025
·
IF 9.8
Xiaolian Jiang,Huanyu Zhou,Yuehua Zhang,Xiaowei Da,Xianfu Chen,Minghui Qiu,Yiqun Fan
The ceramic nanofiltration membranes are widely used in antibiotic desalination due to their high selectivity in separating antibiotics and salts. In this research, a high-flux, highly selective YSZ (yttria-stabilized zirconia) composite nanofiltration membrane was prepared using the sonochemical method. A well-stabilized sol with an average particle size ranging from 1 to 2 nm was obtained through controlled aging and dialysis processes. The doping of yttria effectively inhibited zirconia phase transformation during heat treatment, thereby enhancing membrane integrity and ensuring accurate separation performance. Simultaneously, a 50 nm thick nanofiltration membrane was fabricated on the optimized transition layer, improving its efficient selectivity for antibiotics and salts. At the calcine temperature from 360 to 500 °C, the membrane pore size was precisely tuned to three different MWCOs of 460, 1000, and 2300 Da, with corresponding pure water permeance of 30, 65, and 90 L·m −2 ·h −1 ·bar −1 , respectively. The nanofiltration membrane with a MWCO of 460 Da has retention rates for tetracycline, oxytetracycline, and doxycycline hydrochloride of 96.7 %, 97.6 %, and 99.6 %, respectively, with fluxes of 83.5, 83, and 81 L·m −2 ·h −1 . This study shows a highly efficient ceramic nanofiltration membrane with great potential for separating antibiotics and salts.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 53
·期 3
·917-931
·
IF 4
Shuyan Li,Mingxuan Sun,Xiangzhi Huang,Haohao Chen,Junjie Zhao,Ziyang Li
In this work, N-graphyne is in situ coupled with BiOCl0.5Br0.5via a facile one-step sonochemical method. To our knowledge, both the synthesis strategy for BiOCl0.5Br0.5 and the N-graphyne/BiOCl0.5Br0.5 photocatalytic system are new developments. A collection of characterization methods is adopted to detect the morphologies, structures, and electronic and optical properties. The results demonstrate that wrinkle-like N-graphyne nanosheets successfully enwind around or on flower-like BiOCl0.5Br0.5 microspheres, which are regularly assembled by BiOCl0.5Br0.5 nanosheets. Compared with pristine BiOCl0.5Br0.5, N-graphyne/BiOCl0.5Br0.5 composites exhibit superior adsorption capacity and visible-light-driven photocatalytic degradation of levofloxacin. In particular, the optimal N-graphyne amount for ameliorating the photocatalytic performance of BiOCl0.5Br0.5 is ascertained. In addition, the good stable performance for photocatalysis is confirmed by four cycling experiments. The dominant active species is confirmed to be O2˙− during photodegradation. The improved photocatalytic activity is attributed to the enhanced visible light response and the accelerated transfer/separation of photogenerated carriers by N-graphyne, which are verified using UV–vis absorption spectra, photocurrents, photopotentials, Nyquist plots, and Mott–Schottky curves. This study develops a new perspective for the synthesis and modification of BiOX solid solution, which can be used as an efficient photocatalyst.
研究领域:
材料科学
·
环境科学
·
光催化技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2016
·
IF 4.556
Ling-Xia Zuo,Li-Ping Jiang,Jun-Jie Zhu
For the alkaline fuel cell cathode reaction, it is very essential to develop novel catalysts with superior catalytic properties. Here, we report the synthesis of highly active and stable MoS 2 /Pd composites for the oxygen reduction reaction (ORR), via a simple, eco-friendly sonochemical method. The bulk MoS 2 was first transformed into single and few layers MoS 2 nanosheets through ultrasonic exfoliation. Then the exfoliated MoS 2 nanosheets served as supporting materials for the nucleation and further in-situ growth of Pd nanoparticles to form MoS 2 /Pd composites via ultrasonic irradiation. Cyclic voltammetry and rotating disk voltammetry measurements demonstrate that as-prepared MoS 2 /Pd composites which provides a direct four-electron pathway for the ORR, have better electrocatalytic activity , long-term operation stability than commercial Pt/C catalyst. We expect that the present work would provide a promising strategy for the development of efficient oxygen reduction electrocatalyst . In addition, this study can also be extended to the preparation of other hybrid with desirable morphologies and functions.
研究领域:
材料科学
·
电化学
·
能源科学
✓ 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）