Materials Today Chemistry
·
2022
·
IF 7.613
Yulin Zheng,Yunlei Zhou,Xiaoting Cui,Huanshun Yin,Shiyun Ai
The photoactivity of CdS nanorods was greatly improved by amino functionalized accordion-like MXene and spherical ZnSnO 3 . MXene possesses good electron transfer capability and ZnSnO 3 presents matched energy band with CdS, which deeply accelerate the electron transfer and prevent the recombination of photogenerated electron-hole pair, leading to a strong photoelectrochemical (PEC) response. Taking the merit of the improved photoactivity of CdS nanorods, a novel PEC biosensor was constructed for DNA hydromethylation detection based on immune recognition of target molecule, where 5-hydroxymethyl-2′-deoxycytidine triphosphate (5hmdCTP) was employed as detect target, CdS/MXene was used as photoactive material, and ZnSnO 3 was adopted as signal amplification unit. Under enzymatic covalent reaction of –CH 2 OH of 5hmdCTP with –NH 2 of MXene, 5hmdCTP was specifically recognized and captured. Then, taking advantages of the covalent reaction between phosphate group of 5hmdCTP and ZnSnO 3 , the signal amplification unit was captured. Under the optimum conditions, this PEC biosensor presents wide linear range of 0.008–100 nM and low detection limit of 4.21 pM (3σ). The applicability of the developed method was evaluated by investigating the effect of Cd 2+ and perfluorohexane compound pollutant on 5-hydroxymethylcytosine content in the genomic DNA of the roots and leaves of wheat seedlings.
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2022
·
IF 4.132
Qian Wang,Sining Zhu,Chen Xi,Binhai Jiang,Fan Zhang
In this study, the highly crosslinked hyperbranched polyamide-amines (H-PAMAMs) were first prepared via one-pot methods and then modified with thiourea to synthesize a novel adsorbent containing sulfhydryl groups (CHAP-SH), which was used to adsorb Hg(II) ions from aqueous solutions. The adsorption characteristics and mechanism of CHAP-SH for Hg(II) ions were systematically studied. As expected, CHAP-SH exhibited a rapid removal performance toward Hg(II), and the maximum adsorption capacity was 282.74 mg/g at 318 K and pH = 4.5. The whole adsorption behavior could be well described by the pseudo-second-order kinetic model and Langmuir and Redlich–Peterson adsorption isotherm models, which reflected that the adsorption process was mainly monolayer chemisorption. Meanwhile, CHAP-SH had strong selectivity for Hg(II) in the presence of multimetal ions, and it had excellent recoverability after five cycles. In order to further elucidate the adsorption mechanism, the adsorbents before and after adsorption were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis, and energy-dispersive X-ray spectroscopy, and the results showed that the nitrogen-containing, oxygen-containing, and sulfur-containing groups in the adsorbent molecule had synergistic complexation with Hg(II). These results indicated that the adsorbents had great potential in the future treatment of aqueous solutions containing Hg(II).
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 5
·056513
·
IF 4.386
Jiale Deng,Juan Gao,Mei Liu,Yanfen Wang,Lingcheng Zheng,Yang Li,Yin Liu
TiO2/SnS/MoS2 ternary nanorod arrays were synthesized on a fluorine-doped tin oxide (FTO) conductive glass by a successive hydrothermal method. The morphology, microstructure, optical properties, photodegradation activity, photoelectrochemical performance, and charge transport mechanism of TiO2/SnS/MoS2 were systematically studied. It was found that SnS and MoS2 with a narrow bandgap can facilitate light absorbance of TiO2/SnS/MoS2 heterostructures across the visible range, improving the utilization of sunlight. TiO2/SnS/MoS2 exhibits the maximum photodegradation rate (61.54%) for Rhodamine B (RhB) in 60 min with a pseudo-first-order rate constant (0.0122 min−1), which is about 5.16 times better than that of TiO2. As a photoanode, TiO2/SnS/MoS2 has the highest photocurrent (0.841 mA cm−2), which is approximately 8.32 times better than those of TiO2. The enhanced photocatalytic and photoelectrochemical performance of TiO2/SnS/MoS2 is ascribed to the Z-scheme mechanism determined by the detection of active species and the synergistic effect of SnS and MoS2 co-decoration.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Yongfeng Chen,Geoffrey I.N. Waterhouse,Hemei Sun,Xuguang Qiao,Yufeng Sun,Zhixiang Xu
In this work, a novel ratiometric electrochemical sensor based on dual-functional poly-dopamine (PDA) and nickel sulfide@hollow carbon spheres (NiS@HCS) was successfully developed for sunset yellow (SY) detection. The NiS@HCS nanocomposite possessing a large specific surface area, good catalytic activity and excellent electrical conductivity was employed for signal amplification. PDA films prepared by electropolymerization acted as an internal reference probe and enhanced the sensitivity of the proposed sensor through electrostatic attraction between SY and PDA. Under optimized conditions, the developed PDA/NiS@HCS/GCE sensor allowed SY quantification over wide linear range (0.01–100 μM), with a low limit of detection of 0.003 μM. SY recovery tests were carried out in rice vinegar and cooking wine with satisfactory recoveries (83.50–112.80 %). Meanwhile, the content of SY in two kinds of carbonated drinks was determined using the constructed sensor and a UV–Vis spectrometry method, with no significant difference found in the results.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2022
·Vol. 24
·期 5
·1-10
·
IF 2.533
Wang Wei,Zhi Guowei,Liu Liu,Cao Lihui,Xie Jing,Sun Luanhong,Hao Lingyun,Yao Hanyu
CuSbS 2 particles could be rapidly prepared by the microwave-assisted liquid phase method. Polyethylene glycol (PEG) was used as the directing agent for morphology and structure of CuSbS 2 particles. Microwave irradiation could induce Cu 2+ , adsorbed on PEG chain structure, to reduce as Cu + . In the further reaction, the rod-like structure of CuSbS 2 was formed. The results showed that the CuSbS 2 particles prepared by the PEG400 structure directing agent had a higher first discharge specific capacity (~1499.6 mAh g −1 ) and excellent electronic and ionic conductivity. This method provides a new idea for the morphology control of anode materials for high energy density lithium batteries.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jiaying Zhao,Congjuan He,Weixuan Wu,Huisi Yang,Lan Peng,Li Wen,Zhikun Hu,Changjun Hou,Danqun Huo
Flexible sensing technology has received widespread attention in the monitoring of human physiological indicators. Thus, it is of great significance to develop a universal flexible sensing interface for early diagnosis of multi-level biomarkers. Herein, we reported a multifunctional 3D carbon fiber paper (CFP)-MXene-MoS 2 (CMM) sensing interface, which provided a flexible electrochemical biosensing platform for the ultrasensitive detection of multiple bioanalysis in biofluids. Notably, the CMM electrochemical interface was comprised of staggered carbon fibers on which the organ-like MXene-MoS 2 heterostructure covered with MoS 2 nanosheet arrays was uniformly allocated, permitting local enrichment of biomolecules for enhanced biomolecular capture efficiency, laying a solid foundation for the ultrasensitive detection of multiple biomolecules. In proof-of-concept experiments, we validated that the flexible CMM interface could be applied for ultrasensitive analyzing of quite a few biomolecules like ascorbic acid (AA), uric acid (UA), dopamine (DA) and microRNA (miRNA), with charming sensitivity and reproducibility. It was worth mentioned that an ultra-high sensitivity of 3.16 aM was acquired towards detecting microRNA. Under optimal parameters, the designed electrochemical interface worked well in complex biofluids such as human serum and urine samples. Overall, this flexible and disposable CMM interface with ultrahigh sensitivity provided insights for a more portable, accessible and valuable approach for monitoring biomolecules in clinical diagnosis.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHIC SCIENCE
·
2022
·Vol. 61
·期 4
·339-346
·
IF 1.555
Zhou Jinsen,Liu Cimin,Chen Yong,Luo Xiaoyan,Deng Dongsheng
A reversed-phase isocratic elution high-performance liquid chromatography method coupled with fluorescence detection has been developed to determine urea concentration via online postcolumn derivatization. Swimming pool water samples were filtered through 0.20 μm syringe filters. When the temperature of reaction coil was 40°C, urea was derivatized well with xanthydrol methanol solution (0.1 g/L) containing 0.50% hydrochloric acid with a flow rate of 0.20 mL/min. Successful separation was achieved by using Shim-pack VP-ODS C18 (250 mm × 4.6 mm, 5 μm) column, with a mobile phase containing phosphoric acid solution (0.01 mol/L) at a flow rate of 0.80 mL/min. Retention time and external standard method were used for qualitative and quantitative urea analysis, respectively. Under the established conditions, the limit of detection, linear range, correlation coefficient, recovery and relative standard deviation was 0.09 mg/L, 1.0–100.0 mg/L, 0.9998, 87.0–105.3% and 0.95–4.8%, respectively. Ammonia, thiourea and trichloroisocyanuric acid did not interfere with urea analysis. The method showed satisfactory results with high precision, accuracy, recovery, as well as sensitivity, for the determination of urea in swimming pool water.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 17
·8203-8214
·
IF 3.925
Lingli Zhang,Han Tao,Chun Ji,Qiaoling Wu,Xiao Wang,Yuangeng Wu
As an alternative to bisphenol A (BPA), bisphenol S (BPS) is widely used in many consumer goods and industrial products. However, BPS has similar genotoxic, reproductive and endocrine disrupting effects to BPA and can enter the body through the food chain or by dermal absorption to endanger human health. This paper presents a rapid and direct electrochemical sensing technique for ultra-trace BPS determination on the basis of the signal amplification of the 1T phase & 2H phase hybrid MoS2 nanosheets (1T&2H-MoS2) and amino-functionalized carbon nanotube (CNTs-NH2) composites. The cooperative electrocatalytic effect and high-electrically active surface area of 1T&2H-MoS2/CNTs-NH2 composites not only facilitated the electron transfer between BPS and the electrode, but also promoted the adsorption of BPS on the electrode. Hence, the 1T&2H-MoS2/CNTs-NH2 modified electrode exhibited excellent electrocatalytic activity with a lower oxidation potential and higher peak current for BPS. Under the optimized conditions, the peak current response of BPS showed a good dose-dependent relationship with its concentration in the range of 0.02–1.0 μM and 1.0–70.0 μM, while the detection limit was as low as 8.6 nM. The proposed method was used to determine BPS in the mineral water bottle and orange juice samples with satisfactory spiked recoveries between 92.31% and 104.20%, demonstrating its reliability and practicality in real sample analysis. Furthermore, the sensing method has the characteristics of facile electrode fabrication, fast response (<4 min) and good reproducibility.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Zhiqiang Guo,Lei Sun,Hui Hou,Jian Zhou,Yuan Li,Liangliang Hu,Jinzhang Xu
The preparation of the maple leaf-like MnO 2 –SiO 2 @PDA biomimetic composites not only overcame the problem of easy agglomeration of nanoparticles, but also provided rich functional groups, large specific surface areas and good stability, achieving the efficient sorption of Cu(II), Cd(II) and Ni(II) from aqueous solution. The maximum sorption capacities of the MnO 2 –SiO 2 @PDA towards Cu(II), Cd(II) and Ni(II) attained from the Langmuir model were 218.788, 383.420 and 148.939 mg·g −1 , respectively. The sorption of Cu(II), Cd(II) and Ni(II) on the MnO 2 –SiO 2 @PDA were strongly affected by pH, but not by ionic strength, showing good resistance to salt interference. The main sorption mechanism of the MnO 2 –SiO 2 @PDA towards Cu(II), Cd(II) and Ni(II) was the strong surface complexation of the functional groups on the MnO 2 –SiO 2 @PDA with Cu(II), Cd(II) and Ni(II). Moreover, the radii of Cu(II), Cd(II) and Ni(II) ions and their complexation strength with the MnO 2 –SiO 2 @PDA jointly determined the order of the competitive sorption capacities as Cu(II) > Cd(II) > Ni(II). Given the above analyses, the maple leaf-like MnO 2 –SiO 2 @PDA biomimetic composites have excellent application prospects in practical wastewater treatment.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 16
·9660-9670
·
IF 4.036
Zeju Zhang,Mang Niu,Wei Li,Chenfeng Ding,Peitao Xie,Yongxin Li,Lili Chen,Xiaopeng Lan,Chunlei Liu,Xiaodong Yan,Xuewei Fu,Yaochun Liu,Yuan Liu,Dapeng Cao,Jingjie Dai,Xiaofen Hong,Chunzhao Liu
A breakthrough in enhancing visible-light photocatalysis of wide-bandgap semiconductors such as prototypical titania (TiO2) via cocatalyst decoration is still challenged by insufficient heterojunctions and inevitable interfacial transport issues. Herein, we report a novel TiO2-based composite material composed of in situ generated polymorphic nanodomains including carbon nitride (C3N4) and (001)/(101)-faceted anatase nanocrystals. The introduction of ultrafine C3N4 results in the generation of many oxygen vacancies in the TiO2 lattice, and simultaneously induces the exposure and growth of anatase TiO2(001) facets with high surface energy. The photocatalytic performance of C3N4-induced TiO2 for degradation of 2,4-dichlorophenol under visible-light irradiation was tested, its apparent rate being up to 1.49 × 10−2 min−1, almost 3.8 times as high as that for the pure TiO2 nanofibers. More significantly, even under low operation temperature and after a long-term photocatalytic process, the composite still exhibits exceptional degradation efficiency and stability. The normalized degradation efficiency and effective lifespan of the composite photocatalyst are far superior to other reported modified photocatalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Hongqin Liu,Pengfei Tan,Yong Liu,Huanhuan Zhai,Wenna Du,Xinfeng Liu,Jun Pan
The interfacial charge dynamics was crucial for semiconductor heterostructure photocatalysis. Through the rational design of the heterostructure interface, heterojunction expressed variable recombination and migration dynamics for excited carriers. Herein, followed by a typical chemical bath strategy with the hexagonal cadmium sulfide (CdS) overlapped on the exfoliated molybdenum disulfide (MoS 2 ) film, we developed a cadmium sulfide/molybdenum disulfide (CdS-MoS 2 ) nano-heterojunction and investigated the interfacial charge dynamics for photocatalytic hydrogen evolution. Photoelectron spectroscopy detected an energetic offset between CdS and MoS 2 , revealing the formation of an interfacial electric field with efficient charges separation. Through transient absorption spectra, we demonstrated the type-II contact at the CdS-MoS 2 interface. Driven by the electric field, the excited carriers separated and rapidly migrated to sub-band defects of CdS within the first 500 fs. The carriers-restricted defects provided catalytic active sites, endowing CdS-MoS 2 a highly efficient photocatalytic capability. Consequentially, the CdS-MoS 2 achieved an enhanced hydrogen evolution rate of 2.3 mmol·g −1 ·h −1 with significantly stronger photocurrent density. This work gave an insight to the channel of interfacial separation and migration for excited carriers, which could contribute to the interfacial engineering of advanced heterojunction photocatalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Hongyan Zou,Xiaoying Gu,Chang Xia,Ru Cheng,Chengzhi Huang,Yuanfang Li,Pengfei Gao
True morphology imaging of individual nanoprobes with high sensitivity and in situ dynamic response is crucial in the dark-field microscopy imaging analysis. However, the geometry and orientation of the probes are experimentally challenging to visualize as their physical dimensions are usually below the diffraction limit. In this work, two-dimensional triangular gold nanoplates (AuNPLs) with the edge length > 600 nm and the thickness ~25 nm displayed clear triangular-shaped far-field scattering patterns (TFSPs) under a dark-field imaging system owing to the strong electrical field strength around the sharp edges and tips. Thus, their actual shape and orientation specific scattering image are directly visualized only by dark-field microscopy and furtherly applied to real-time monitor the etching and alloying progress of AuNPLs. The results showed that the reactive sites of AuNPLs are located at their vertices and sharp edges owing to the sensitive edge effect. This work provides a new perspective to directly monitor the conformation and dynamics of chemical reaction at the single particle level.
✓ 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）