CELLULOSE
·
2024
·
IF 4.9
Song Ru,Zhu Enwen,Hou Runqing,Niu Fukun,Bao Jiangkai,Chen Dan,Shi Zhuqun,Yang Quanling,Xiong Chuanxi
Treating water pollution, especially dye-contaminated wastewater, in an economical and efficient manner remains a challenge as the surface charge diversity of contaminants. This work designed a nanocellulose-based amphoteric adsorbent based on 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO)-oxidized cellulose nanofibrils (TOCNs) with in situ polymerization of diallyl dimethyl ammonium chloride (PDMDAAC). To explore the adsorption capacity of the amphoteric adsorbent (TOCN/PDMDAAC) for negatively and positively charged contaminants, methyl orange (MO, an anionic dye) and methylene blue (MB, a cationic dye) were employed as adsorbates. The effect of adsorbent on the adsorption performance at different pH, initial concentration of dye, contact time and ionic strength were investigated by batch treatment method. Equilibrium isotherms, kinetics and thermodynamics of dyes onto TOCN/PDMDAAC were examined, which implied that the adsorption behavior was monolayer and the adsorption process was spontaneous endothermic. The adsorption mechanisms are hydrogen bonding and electrostatic interactions between the dye and the active site on the adsorbent. The adsorption behavior of the binary blended dye system of MO and MB has also been investigated, and the addition of the other dye of higher concentration showed a synergistic adsorption behavior. According to the Langmuir model, at pH 7, 298 K, the equilibrium adsorption of MO and MB onto TOCN/PDMDAAC was as high as 404.86 mg g −1 and 520.83 mg g −1 , respectively. These results indicated that TOCN/PDMDAAC was an effective amphoteric adsorbent, which offered a promising strategy for the adsorption of multicomponent dyes in an eco-friendly way. Graphic Abstract
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-12
·
IF 14.7
Chu Tianshu,Zhou Ze,Tian Pengfei,Yu Tingting,Lian Cheng,Zhang Bowei,Xuan Fu-Zhen
Manipulation of confined water dynamics by voltage keeps great importance for diverse applications. However, limitations on the membrane functions, voltage-control range, and unclear dynamics need to be addressed. Herein, we report an anomalous electrically controlled gating phenomenon on cation-intercalated multi-layer Ti 3 C 2 membranes and reveal the confined water dynamics. The water permeation rate was improved rapidly following the application and rise of voltage and finally reached a maximum rate at 0.9 V. The permeation rate starts to decrease from 0.9 V. Below 0.9 V, the electric field affects the charge and polarity of water molecules and then leads to ordered and denser rearrangement in the two-dimensional (2D) channel to accelerate the permeation rate. Above 0.9 V, with the assistance of metal cations, the surge in current induced aggregation of water molecules into clusters, thereby limiting the water mobility. Based on these findings, a high-performance humidity sensor was developed by simultaneously optimizing the response and recovery speeds through electric manipulation. This work provides flexible strategies in intelligent membrane design and nanofluidic sensing.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano-Micro Letters
·
2024
·Vol. 17
·期 1
·1-14
·
IF 31.6
Wang Jingang,Yu Haibo,Zheng Jianchen,Zhang Yuzhao,Guo Hongji,Qiu Ye,Wang Xiaoduo,Yang Yongliang,Liu Lianqing
A 2.5-dimensional dynamic structural color based on nanogratings of heterogeneous materials was proposed by interweaving a pH-responsive hydrogel with IP-L photoresist.
The nanogrid structures exhibit brilliant tuneable structural color, high sensitivity, and ultrafast recovery speeds in response to pH.
The 4D printing-based grayscale design approach was proposed for the patterned encoding and array printing of dynamic structural colors, promoting their application in patterned printing, information encryption, and microfluidic chip sensing.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 10
·1-9
·
IF 6.232
Huang Lingting,Wang Jun,Wang Qingshui,Tang Dianping,Lin Yao
A paper-based visual fluorescence immunoassay is presented for the detection of matrix metalloproteinase-7 (MMP7) that is related to renal cancer. The method is based on the distance-dependent fluorescence quenching of CdTe quantum dots (QDs) on a nitrocellulose membrane by Ag + following a sandwich-type immunoreaction on microtiter wells using silver nanoparticle (AgNP)–labeled secondary antibody– and primary antibody–coated microtiter wells. The silver nanoparticles captured in the well are dissolved with HNO 3 , while the quenching effect of QDs is based on silver ion-exchange reaction under 365-nm excitation light irradiation. Increasing concentration of released Ag + , thus higher concentration of the protein, leads to an increased distance of quenching on the nitrocellulose membrane. The paper-based immunoassay by combination of AgNP-assisted ion-exchange reaction with QD gives good distance-dependent responses and allows the detection of MMP7 at a concentration as low as 7.3 pg mL −1 . The coefficients of variation are less than 6.9% and 12.4% for intra-assay and inter-assay, respectively. High specificity and long-term stability are achieved during the assay. Importantly, the testing of human serum samples using our strategy shows well-matched results with commercial human MMP7 ELISA kits.
A distance-dependent visual immunoassay is developed for the determination of serum matrix metalloproteinase-7 on CdTe quantum dot–impregnated paper with silver ion-exchange reaction.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Chinese Medicine
·
2018
·Vol. 13
·期 1
·1-18
·
IF 1.802
Yan Yan,Du Chenhui,Li Zhenyu,Zhang Min,Li Jin,Jia Jinping,Li Aiping,Qin Xuemei,Song Qiang
Background Microbial fermentation has been widely applied in traditional Chinese medicine (TCM) for thousands of years in China. Various beneficial effects of fermentation for applications in TCM or herbals have been reported, such as enhanced anti-ovarian cancer, antioxidative activity, and neuroprotective effects. Ge-Gen-Qin-Lian decoction (GQD), a classic TCM formula, has been used to treat type 2 diabetes mellitus in China. In this study, GQD was fermented with Saccharomyces cerevisiae , and the antidiabetic activities and overall chemical profiles of raw and fermented GQD (FGQD) were systematically compared. Methods First, the antidiabetic effects of GQD and FGQD on high-fat diet and streptozotocin (STZ)-induced diabetic rats were compared. Then, high-performance liquid chromatography Q Exactive MS was applied for rapid characterization of the chemical components of GQD. Additionally, we proposed an integrated chromatographic technique based untargeted metabolomics identifying differential chemical markers between GQD and FGQD and targeted analysis determining the fermenting-induced quantitative variation tendencies of chemical marker strategy for overall chemical profiling of raw and fermented GQD. Results Both GQD and FGQD displayed effects against HFD and STZ-induced diabetes, and FGQD showed a better recovery trend associated with profound changes in the serum lipoprotein profile and body weight gain. In addition, 133 compounds were characterized from GQD. It was demonstrated that the integrated strategy holistically illuminated 30 chemical markers contributed to the separation of GQD and FGQD, and further elucidated the fermenting-induced chemical transformation mechanisms and inherent chemical connections of secondary metabolites. Although there were no new secondary metabolites in FGQD compared with GQD, the amounts of secondary metabolites, which were mostly deglycosylated, were redistributed in FGQD. Conclusion The anti-diabetic activities of GQD could be improved by applying fermentation technology. Moreover, the proposed strategy could serve as a powerful tool for systematically exploring the chemical profiles of raw and fermented formulas.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-12
·
IF 4.259
Liu Liang,Xu Qingqing,Hao Shuai,Chen Yun
MicroRNAs (miRNAs) play a vital role in regulating gene expression and are associated with a variety of cancers, including breast cancer. Their distorted and unique expression is a potential marker in clinical diagnoses and prognoses. Thus, accurate determination of miRNA expression levels is a prerequisite for their applications. However, the assays currently available for miRNA detection typically require pre-enrichment, amplification and labeling steps, and most of the assays are only semi-quantitative. Therefore, we developed a quasi-direct liquid chromatography-tandem mass spectrometry (LC-MS/MS)-based targeted proteomics approach to quantify target miRNA by innovatively converting the miRNA signal into the mass response of a reporter peptide via a covalently immobilized DNA-peptide probe. Specifically, the probe containing the targeted proteomics-selected substrate/reporter peptide, GDR AVQLGVDPFR/AVQLGVDPFR, and the DNA sequence complementary to the target miRNA (i.e., miR-21) was first immobilized on APMTS modified silica nanoparticles using PDITC. After the immobilized probe was recognized and hybridized with the target miRNA, the excess probe was degraded using MBN and followed by a trypsin digestion of the hybrids. The reporter peptide was released and quantified using LC-MS/MS. The obtained LOQ was 5 pM. Finally, the developed assay was used for the quantitative analysis of miR-21 in breast cells and tissue samples.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Scientific Reports
·
2019
·Vol. 9
·期 1
·1-9
·
IF 4.011
Zhou Yihang,Wang Kai,Hu Dongbo
To explore new methods to maintain the dimensional stability of waterlogged archaeological wood after drying and keep the natural cell lumens unaltered for future retreatments, activator regenerated by electron transfer (ARGET) atom transfer radical polymerization (ATRP) is employed to consolidate archaeological wood. To prepare the ATRP process, the waterlogged archaeological wood samples ( Pinus massoniana with maximum moisture content of around 529%) were first modified by 2-bromoisobutyryl bromide in CH 2 Cl 2 to acquire C-Br bonds as initiators. Then, butyl methacrylate or styrene was polymerized to the remaining cell walls with catalyst (CuBr 2 ), reductant (ascorbic acid) and ligand (PMDETA) in ethanol. After the treatment, the samples were washed and naturally dried. The results characterized by microscopy showed that the polymerization only took place within the remaining cell walls, showing no sign of collapse or distortion after air drying, and all natural cell lumens could be retained for future retreatments. Also, anti-shrinkage efficiencies as high as 87.8% for the wood sample grafted with polystyrene and 98.5% for the wood sample grafted with polybutylmethacrylate were obtained from the treatment described in this paper, indicating modification of grafting polymer through ARGET ATRP can help maintain the dimensional stability of water archaeological wood effectively.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2014
·Vol. 407
·期 2
·509-519
·
IF 3.578
He Hongliang,Gu Xiaoli,Shi Liying,Hong Junli,Zhang Hongjuan,Gao Yankun,Du Shuhu,Chen Lina
Highly selective molecularly imprinted mesoporous silica polymer (SBA-15@MIP) for baicalein (BAI) extraction was synthesized using a surface molecular imprinting technique on the SBA-15 supporter. Computational simulation was used to predict the optimal functional monomer for the rational design of SBA-15@MIP. Meanwhile, high adsorption capacity was obtained when a suitable yield of molecularly imprinted polymers (MIPs) layer was grafted onto the surface of SBA-15. Characterization and performance tests of the obtained polymer revealed that SBA-15@MIP possessed a highly ordered mesoporous structure, reached saturated adsorption within 60 min, and exhibited higher sorption capacity to the target molecule BAI compared with non-imprinted mesoporous silica polymer (SBA-15@NIP) and SBA-15. Finally, SBA-15@MIP was successfully applied to solid-phase extraction (SPE) coupled with high-performance liquid chromatography and ultraviolet detection (HPLC-UV) for the determination of trace BAI in plasma samples. Mean recoveries of BAI through the molecularly imprinted solid-phase extraction (MISPE) sorbent, non-imprinted solid-phase extraction (NISPE) sorbent, and SBA-15 solid-phase extraction (SBA-15-SPE) sorbent were 94.4, 22.7, and 10.7 %, respectively, and the relative standard deviations were 2.9, 2.6, and 3.6 %, respectively. These results reveal that SBA-15@MIP as a SPE sorbent has good applicability to selectively separate and enrich trace BAI from complex samples.
Synthesis procedure of SBA-15@MIP
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2024
·
IF 4.9
Liu Lei,Hu Yufan,Yang Yuhui,Cheng Hongbin,Xiao Shili
Printing and dyeing wastewater can cause serious environmental pollutant and must be treated to meet the emission standards before discharge. In this study, we report a method to prepare nano zero-valent iron (nZVI) particle-immobilized cotton (nZVI@cotton) fabrics assisted by polydopamine (PDA) deposition using cotton fabrics as the substrate. The mechanical property tests of cotton fabric revealed a significant improvement in the breaking strength after deposition of PDA. The pollutant removal capability of nZVI@cotton fabric was evaluated using rhodamine B and Cr(VI) as models. The decolorization efficiency of rhodamine B could be up to 79.45% and Cr(VI) removal efficiency was 70.74% within 60 min, respectively. In addition, the iron content, different nZVI@cotton fabric system, the effect of pollutant composition and reusability of nZVI@cotton fabric were systematically investigated. Results showed that nZVI@cotton fabric prepared with the assistance of PDA was a kind of comparable wastewater purification material with the advantages of high removal efficiency to rhodamine B and Cr(VI) ions and easy to be recycled.
✓ 已验证
产品关联
DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2025
·Vol. 236
·期 3
·1-14
·
IF 3
Li Yunfei,Liu Zhichang,Ren Hongwei,Chen Chunmao
The dyeing industry wastewater has greatly hampered the ecological environment. The carbon quantum dots (CQDs) is a promising catalyst for photocatalytic degradation. To control the specified structure of CQDs, a designable-green deep eutectic solvents (DESs) was targeted as the precursor. In this work, a copper-doped solid-state Cu-CQDs was successfully prepared by combustion method from glycerol/choline chloride/CuCl 2 ·2H 2 O DESs, and characterized by Fourier transform infrared spectroscopy, XRD, XPS, UV–Vis spectroscopy, and fluorescence spectroscopy. The analysis revealed that the metallic copper-doped Cu-CQDs have better morphological and structural properties and exhibit good optics characteristics. The prepared CQDs were applied to the photocatalytic degradation of Rhodamine-B (RhB). It was found that the ⋅O 2 − was the main active specie, and it can efficient degrade RhB up to 95%. Graphical abstract
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Gong Cheng,Li Haiyun,Wang Huaxin,Zhang Cong,Zhuang Qixin,Wang Awen,Xu Zhiyuan,Cai Wensi,Li Ru,Li Xiong,Zang Zhigang
The bidirectional migration of halides and silver causes irreversible chemical corrosion to the electrodes and perovskite layer, affecting long-term operation stability of perovskite solar cells. Here we propose a silver coordination-induced n-doping of [6,6]-phenyl-C 61 -butyric acid methyl ester strategy to safeguard Ag electrode against corrosion and impede the migration of iodine within the PSCs. Meanwhile, the coordination between DCBP and silver induces n-doping in the PCBM layer, accelerating electron extraction from the perovskite layer. The resultant PSCs demonstrate an efficiency of 26.03% (certified 25.51%) with a minimal non-radiative voltage loss of 126 mV. The PCE of resulting devices retain 95% of their initial value after 2500 h of continuous maximum power point tracking under one-sun irradiation, and > 90% of their initial value even after 1500 h of accelerated aging at 85 °C and 85% relative humidity.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2024
·Vol. 31
·期 9
·5591-5608
·
IF 4.9
Zhang Yang,Liao He,Zhang Yue,Zhang Yumei
With the increasing demand for environmentally friendly and sustainable materials, research on cellulose/bio-based polyester composites has received increasing attention. However, the hydrophilicity of cellulose remains a major factor in its poor interaction with hydrophobic bio-based polyester. To prepare microcrystalline cellulose (MCC)/poly(butylene succinate) (PBS) composite monofilaments with high cellulose content to suppress the deformation of PBS, hexadecyltrimethoxysilane (KH1631) was selected for surface silylation of MCC at a mass ratio of 1:0.5 based on the principle of polarity similarity. The physical–chemical double crosslinking of KH1631 with MCC enhanced the interfacial bonding between MCC and PBS, so composite monofilaments with modified MCC (named mMCC) contents up to 35 wt% were prepared by melt spinning. After thermal stretching, mMCC/PBS composite monofilaments exhibited uniformly distributed microporous structure and double yield behaviors. Despite the continuous decrease in breaking strength (from 210 to 84 MPa) and elastic modulus (from 1380 to 590 MPa) due to the addition of mMCC, the yield strength (116 MPa) of the mMCC/PBS composite monofilaments was consistent with that of PBS when the mMCC addition reached 25 wt%, indicating no impact on usage intensity. Moreover, mMCC/PBS composite monofilaments showed excellent tensile elasticity (up to 95%), excellent fatigue resistance, and low residual strains under small deformation (15%). Notably, the addition of 15–35 wt% mMCC increased the degradability of composite monofilaments, the degradation rate following 100 days of treatment in an aqueous environment ranged from 3.8%(PBS) to 4.7% (P-mM25), and the degradation rate following 180 days of burial in soil ranged from 3.9%(PBS) to 12.3% (P-mM35). Overall, our work significantly enhanced the compatibility between MCC and PBS without the use of any high-cost modifiers or complex processing methods, and successfully developed mMCC/PBS composite monofilaments that exhibit excellent dimensional stability during use and quick degradation after disposal.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）