Materials
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2018
·Vol. 11
·期 5
·791
·
IF 2.467
Junping Ding,Huanchun Wang,Haomin Xu,Lina Qiao,Yidong Luo,Yuanhua Lin,Cewen Nan
High efficiency photocatalyst Bi2O2(CO3)1−xSxwas synthesized conveniently with chemical bath precipitation using Bi2O2CO3as the precursor. The microstructures of the samples are systematically characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS) and UV-Vis spectroscopy; the optical and photocatalytic properties are carefully tested as well. The content ofS, which was tuned through the controlling of the precipitation process, was verified to have an intense effect over the photocatalytic properties. A nearly saturatedSratio and the best photocatalytic performance were observed in specimens with the mostScontent. Our study reveals that, with negligible influence of the morphology and crystal structure, Bi2O2(CO3)1−xSxpossessed a broadened optical absorption regionfromultraviolet to visible light, and enhanced photocatalytic activity in comparison to precursor Bi2O2CO3in photocatalytic degradation of Congo Red aqueous solution.Keywords:Bi2O2CO3;Bi2O2(CO3)1−xSx;broadband spectra;photocatalysis
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Nanoscale
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2013
·Vol. 5
·期 13
·5833-5840
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IF 6.233
Li-qiang Luo,Zhao Zhang,Ya-ping Ding,Dong-mei Deng,Xiao-li Zhu,Zhen-xin Wang
In this work, we proposed a novel simple protocol for preparing 1-aminopyrene/graphene (ApG) hybrids for fabricating label-free electrochemical impedance genosensor. Graphene, with the structure of a single-atom-thick sheet of sp2-bonded carbon atoms, was anchored to 1-aminopyrene (1-Ap) with the pyrenyl group via π-stacking interaction. The morphology, conductivity, and interaction of ApG hybrids were characterized by transmission electron microscopy (TEM), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), UV-visible (UV-vis) and fluorescence spectra. The amino-substituted oligonucleotide probe was conjugated to 1-Ap by the cross-linker glutaraldehyde. The DNA hybridization reaction of oligonucleotide probe with target DNA was monitored by EIS. Under optimum conditions, the proposed biosensor exhibited high sensitivity and a low detection limit for detecting the complementary oligonucleotide. The target oligonucleotide could be quantified in a wide range of 1.0 × 10−12 to 1.0 × 10−8 M with good linearity (R = 0.9900) and low detection limit of 4.5 × 10−13 M (S/N = 3).
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CHINESE CHEMICAL LETTERS
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2015
·
IF 1.587
Na Li,Rui Chen,Jing Miao,Peng Zhou,Hai-Bin Yu,Tie-Hong Chen
Hierarchically mesoporous titanosilicate Ti-SBA-1 was synthesized with organic mesomorphous complexes of polyelectrolyte (poly(acrylic acid) (PAA)) and cationic surfactant (hexadecyl pyridinium chloride (CPC)) as template, tetraethylsiloxane as silica source and titanium ethoxide as titanium source. By adjusting the amount of titanium ethoxide in the synthesis, a series of Ti-SBA-1 particles with different Si/Ti ratio (79–180) were prepared. After incorporation of Ti into the silica framework the well-ordered cubic P m 3 ¯ n mesostructure remained, as well as the morphology, particle size. UV–vis DR spectra of the Ti-SBA-1 materials indicated that incorporated titanium species existed in a highly dispersed state and exhibited tetrahedral and octahedral coordination in the silica framework.
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FOOD HYDROCOLLOIDS
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2014
·
IF 4.28
Xiuting Hu,Hongyan Li,Benxi Wei,Xueming Xu,Zhengyu Jin,Yaoqi Tian
The aim of this study was to examine 1-buatnol–hydrochloric acid (1-butanol–HCl) hydrolysis process of starch . Normal rice starch was hydrolyzed by 0.36% HCl in anhydrous 1-butanol at 40 °C from 4 h to 7 days. The changes in starch granule, crystalline, and molecular weight during the 1-butanol–HCl hydrolysis were determined using SEM, particle size analyzer, XRD, HPSEC–MALLS–RI, and iodine staining. SEM and particle size analyzer analysis showed that the granule morphology significantly changed and the granule size decreased from 5.47 μm to 5.07 μm after the hydrolysis by 1-butanol–HCl for 7 days. XRD results indicated that amorphous areas of normal rice starch were firstly hydrolyzed followed by the ordered areas during 1-butanol–HCl hydrolysis. The peak (2 θ ) of V-type crystallinity was detected at around 20° in the XRD curves of 1-butanol–HCl-hydrolyzed starches. This peak confirmed the formation of amylose–1-butanol complex. HPSEC–MALLS–RI and iodine staining analysis demonstrated that the weight-average molecular weight of normal rice starch sharply decreased from 2.4 × 10 7 Da to 4.9 × 10 5 Da after 1-butanol–HCl hydrolysis for 4 h, then gradually decreased, and finally stabilized at about 2.6 × 10 4 Da after hydrolysis for 4 days. These results suggest that the attack of 1-butanol–HCl on normal rice starch preferentially occurred in the amylopectin molecules of amorphous areas.
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RSC Advances
·
2015
·Vol. 5
·期 45
·35448-35452
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IF 3.84
Xuejuan Chen,Xiaojing Bai,Huiyan Li,Bailin Zhang
An aptamer-based microcantilever array sensor for detection of fumonisin B-1 (FB1) was developed. The sensing cantilevers in the array were functionalized with self-assembled monolayers (SAMs) of thiolated FB1-specific aptamer, while the reference cantilevers were modified with 6-mercapto-1-hexanol SAMs to eliminate interference from the environment by detecting the deflection induced by nonspecific interactions. This differential deflection amplitude between sensing and reference cantilevers shows a linearity relation with the concentration of FB1 in the range from 0.1 to 40 μg mL−1, with a limit of detection of 33 ng mL−1 (S/N = 3). The sensor exhibits good specificity over ochratoxin A (OTA) and deoxynivalenol (DON). This biosensor provides a promising approach to detect FB1 in food and agricultural products.
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RSC Advances
·
2017
·Vol. 7
·期 65
·41070-41076
·
IF 3.108
Xin-ling Fu,Ming Zeng,Jian-bo Zhou,Chao Xu
A novel strategy for synthesizing silicalite-1 membrane by hydrothermal synthesis without organic template after coating the support with a mixture of modified cellulose and seeds was successfully proposed. The membrane possesses high ideal separation factors of H2 over various gases which is larger than the corresponding Knudsen diffusion coefficients. The selectivity of AcOH from AcOH/H2O mixtures can reach to 65 and stable for 180 h. The characterization results by XRD and SEM showed that the excellent performance can be attributed to both modified cellulose and the synthesis without organic template. Modified cellulose attracted more silicalite-1 nutrients to the support and assisted the synthesis of more compact silicalite-1 zeolite membrane. Calcination after synthesis was avoided, thus avoiding macrostructure defects appearing during the process of calcination.
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NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Mingjie Li,Xuesong Peng,Jie Jiang,Yaqiang Li,Fan Meng,Youzheng Wu,Maozhong An,Ruopeng Li,Penghui Ren,Peixia Yang
The void-free blind microvia copper electroplating process is a key technology in HDI PCB manufacturing. This work systematically studied the influence of the Acid Blue 1 (AB1) leveler on blind microvia filling. AB1 exhibits excellent suppression during electroplating, with its effect strengthening as the AB1 concentration increases. Chronopotentiometry was used to study the interaction among AB1, SPS, and PEG. There is a synergistic suppressing interaction between the new leveler AB1 and suppressor PEG, while there is competition between AB1 and accelerator SPS. During electrodeposition, AB1 can adsorb on the copper substrate to reduce active sites and suppress copper electrodeposition, based on theoretical studies and in situ infrared spectroscopy. At the optimized electroplating process, void-free microvia filling is achieved with 20 mg L−1 AB1 and successive electroplating confirms the stability of AB1. Based on diffusion differences among additives and the competition between AB1 and SPS, a gradient competitive adsorption superfilling mechanism was proposed to illustrate the filling process of the AB1–SPS–PEG system. AB1 is beneficial to improving flatness and lowering surface roughness of the copper layer, which is conducive to reducing signal losses during high-frequency transmission. Additionally, AB1 can modulate the preferential formation of Cu(111) and Cu(200) and facilitate grain refinement.
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Sensors and Actuators Reports
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2024
·
IF 6.5
Song Ge,Mingxin Wang,Shunhua Zhu,Han Wu,Jing Li,Dongsheng Liu,Qingli Huang,Shibao Li,Xiaojing Sun
Purpose As an important reference index for the early diagnosis of non-small cell lung cancer (NSCLC), CYFRA21-1 still lacks the detection of low equipment cost, wide linear range and high sensitivity. Surface-enhanced Raman scattering (SERS) is a vibration spectrum technology based on the surface plasma of precious metal nanoparticles, which has been effectively applied to the detection of tumor markers. The combination of SERS technology and sensors has great potential in the ultrasensitive detection of tumor markers. The purpose of this study was to develop a sensitive method using SERS to quantitatively detect CYFRA21-1 for early diagnosis of NSCLC. Methods A double-antibody sandwich immunoassay based on SERS was designed and tested to implement the ultrasensitive detection of CYFRA21-1 in the serum of NSCLC patients. Results Gold @Ag nanorods (Au @Ag NRs) with higher Raman signals were prepared and used as probes, while magnetic graphene oxide was used as a magnetic substrate. The immunized probe, immune substrate and CYFRA21-1 standard substance in the buffer system formed a double-antibody sandwich structure. The standard curve displayed a liner range from 1pg mL −1 to 10 ng mL −1 , and the detection limit (LOD) is 0.8943pg mL −1 . The Raman intensity exhibited a wide linear relationship with the logarithm of CYFRA21-1 concentration. Conclusion Our study successfully established a double-antibody sandwich immunoassay based on SERS. This method demonstrated high specificity and sensitivity for detecting CYFRA21-1 protein content in serum. It has the potential to be applied for early detection of lung cancer biomarkers.
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JOURNAL OF HAZARDOUS MATERIALS
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2024
·
IF 12.2
Qian Zhao,Xin Li,Guangyuan Chen,Zeru Wang,Chuan Tan,Cheng Liu,Hao Zou,Jing Ma,Lin Zhu,Tao Duan
Effective capture of radioactive iodine from nuclear fuel reprocessing is of great importance for public safety as well as the secure utility of nuclear energy. In this work, a hydrophobic nanosheet silicalite-1 (NSL-1) zeolite with an adjustable size was developed for efficient iodine (I 2 ) and methyl iodide (CH 3 I) adsorption. The optimized all-silica zeolite NSL-1 exhibits an excellent I 2 uptake capacity of 553 mg/g within 45 min and a CH 3 I uptake capacity of 262 mg/g within 1 h. Benefiting from the reduced thickness and enhanced porosity, microporous NSL-1 possesses enhanced iodine adsorption capacity and fast adsorption kinetics , which is a considerable high value among inorganic materials . Unexpectedly, the remarkable characters of high hydrophobicity , acid-resistance and anti-oxidation endow it a higher iodine uptake capacity than traditional aluminosilicate zeolites. More importantly, the high uptake selectivity toward I 2 possessed by NSL-1 owing to its hydrophobic skeleton under simulated dynamic conditions. The low cost, facile and scalable synthesis of NSL-1 further highlights great prospects for applications in the nuclear industry. This work provides useful insights for designing efficient adsorbents for iodine capture .
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CELLULAR SIGNALLING
·
2025
·
IF 3.7
Jie Liu,Mei-qi He,Gao-peng Guan,Xin-xing Wan,Ping Jin
Type 1 diabetes (T1D) is an autoimmune disease characterized by hyperglycemia caused by the destruction of insulin-producing β cells. Viral infection is an important environmental factor which is associated with the islet autoimmunity in genetically susceptible individuals. Loss of β-cells and triggering of insulitis following viral infection could result from several non-exclusive mechanisms. Despite a significant increase in ISG15 levels following viral infection, the specific role of ISG15 in the impairment of insulin-producing β-cells is unclear. To address this issue at the clinical level, we conducted this experimental work, and found elevated levels of ISG15 in the peripheral blood of T1D patients, suggesting a potential link between ISG15 and T1D. In the T1D animal model, we discovered that both ISG15 levels and cellular apoptosis were increased in pancreatic islet tissue. To investigate at the cellular level, we cultured MIN6 cells in the presence of supernatants derived from iBMDM cells transfected with poly(I:C) (PIC), a viral mimic. This exposure led to an upregulation of ISG15 expression in MIN6 cells, which was accompanied by the suppression of their functional capabilities and viability. Intriguingly, the direct transfection of MIN6 cells with PIC increased the expression of ISG15. We further found that elevated levels of ISG15 had a direct inhibitory effect on insulin secretion and it also contributed to β-cell apoptosis in a TNF-α-dependent manner. In conclusion, our study revealed a potential underlying mechanism through which ISG15 increases the apoptosis of β-cells, providing valuable insights that could facilitate the development of T1D treatment strategies.
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VETERINARY RESEARCH
·
2024
·Vol. 55
·期 1
·1-9
·
IF 3.7
Yang Jia,Li Li,Xu Fuqiang,Jia Fan
Feline herpesvirus type 1 (FHV-1), a member of the Herpesviridae family, is one of the most important pathogens that causes upper respiratory tract disease in felines. Following infection, FHV-1 can spread retrogradely to the trigeminal ganglia, establishing a life-long latency. Although vaccines are available for routine feline vaccination, FHV-1 is still an agent that poses a serious threat to feline health. There are currently no specific drugs for the treatment of FHV-1. To facilitate the screening of antiviral drugs, we constructed a reporter FHV-1 virus, which expresses a secreted Gaussia luciferase (GLuc) and a bright green fluorescent protein, mNeonGreen. The reporter virus shows slower growth than does the wild-type FHV-1. The expression of the two reporter genes, Gluc and mNeonGreen, was consistent with viral propagation and remained stable during continuous passage in CRFK cells, even after twenty rounds. In addition, the known inhibitor ganciclovir was used to confirm the characteristics of the reporter virus for drug screening. We found that the reporter FHV-1 is suitable for antiviral screening assays. Overall, our work provides a useful tool for screening drugs to combat FHV-1.
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Sensing and Bio-Sensing Research
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2024
·
IF 5.4
Weiran Mao,Xiaoyan Zhang,Yuanyuan Yin,Xiaohua Tang,Qingqing Jiang,Xia Chen,Xiaoliang Chen
This study proposes a novel sandwich-based ratio electrochemiluminescence (ECL) immunosensor for detecting monocyte chemotactic protein-1 (MCP-1), a marker of cardiovascular disease. We synthesized sulfur-doped palladium nanosheets (S-PdNS), which possess a stable structure and uniform morphology, and can quench signals generated by the S 2 O 8 2− /O 2 ECL system. Using glutaraldehyde (GA), we conjugated luminol to these nanosheets and combined them with a secondary antibody. This modification enabled the nanomaterial to produce a new luminol signal as an internal reference for detection while quenching the S 2 O 8 2− /O 2 ECL signal. To date, no studies have utilized both mechanisms for detection. Furthermore, the deposition of gold nanoparticles (AuNPs) on the surface of the glassy carbon electrode (GCE) allowed for increased antibody binding and improved electron transmission in the ECL system. When trace analytes are present, the S 2 O 8 2− /O 2 ECL signal decreases, and the luminol ECL signal increases. This setup allowed us to obtain two signals from one measurement and use the ratio to construct a standard curve, significantly reducing the possibility of misjudgment. Under optimal conditions, the linear detection range for MCP-1 is 10 –2.5 pg mL −1 to 10 3 pg mL −1 , with a detection limit of 1.6 fg mL −1 (S / N = 3). The immunosensor also exhibited excellent selectivity, repeatability, and stability, expanding the application of the dual luminescence mechanism and providing an effective method for early monitoring of cardiovascular disease.
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