MATERIALS & DESIGN
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2020
·
IF 6.289
Yuefeng Gao,Xinxiang Pan,Sai Xu,Zhijian Liu,Junsheng Wang,Kezhen Yu,Chengfa Wang,Haichao Yuan,Sen Wu
Sensitive on-line detection of Cu 2+ in lubricating oil of marine power plant is important for displaying equipment wear status and fault pre-judgment in real time. However, there are few reports on in-situ, portable and highly sensitive Cu 2+ detection devices in organic media before. In this report, CsPbBr 3 perovskite quantum dots (PQDs) are employed as fluorescence probe for Cu 2+ detection in microfluidic chip. The size effect of the CsPbBr 3 QDs on the detection performances is firstly investigated. To obtain preferable sensitivity and detection limit, polymethyl methacrylate opal photonic crystals (PMMA OPCs) film is developed as microfluidic sensor substrate, which can tremendously improve the fluorescence intensity of PQDs as high as 26-fold. The enhancement effect can be attributed to the coupling between photonic crystal stopband effect and the excitation light field. Moreover, the use of photomultiplier module for fluorescence signal measurement enables the detection device to be portable. The novel strategy offers the advantages of higher sensitivity (8.62 μM –1 ) and lower detection limit (0.40 nM). Otherwise, this sensor also provides wide detection range and good selectivity, thus, it will have potential in oil quality in-situ detection and mechanical wear prediction in the future.
研究领域:
分析化学
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材料科学
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环境监测
✓ 已验证
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2021
·
IF 9.811
Qinggang Zhang,Xiaochuan Sun,Weilin Zheng,Qun Wan,Mingming Liu,Xinrong Liao,Takeshi Hagio,Ryoichi Ichino,Long Kong,Huamiao Wang,Liang Li
For next-generation high-definition displays, the newly recommendation 2020 (Rec. 2020) standard calls for the emission wavelength of green emitters to be kept at 525–535 nm with narrow emission line width below 25 nm. All-inorganic lead halide perovskite CsPbBr3 nanocrystals (NCs) with sharp emission seem as the prefect one to match the call, however, it is a great challenge to tune their emission wavelength to the target window of 525–535 nm because of the intrinsic band gap of CsPbBr3. Herein, we report a facile strategy to prepare CsPbBr3 NCs with finely tunable emissions in the narrow range of 525–535 nm by establishing a CsPbBr3–Cs4PbBr6:Na Type II structure. The doping of the Na ions is the key factor to construct the Type II structure, which induces the formation of the Cs4PbBr6:Na phase and builds CsPbBr3–Cs4PbBr6:Na Type II structure, leading to the tunable emission wavelength of CsPbBr3 NCs. The as-synthesized CsPbBr3 NCs exhibit an ideal emission at 525–535 nm with a narrow emission line width of 23 nm and a high photoluminescence quantum yield (PLQY) of 85%. As a green downconverter, an ultrapure green backlight covers 97% of the Rec. 2020 standard in the CIE 1931 color space, representing the “greenest” backlight up to now.
研究领域:
材料科学
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显示技术
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纳米科技
✓ 已验证
DOI
高影响因子
DESALINATION
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2010
·
IF 2.034
Zhanqiang Fang,Xinhong Qiu,Jinhong Chen,Xiuqi Qiu
Due to the increasing levels of polybrominated diphenyl ethers (PBDEs) in the environment and their persistent toxicity, methods of removing PBDEs from the environment have become a necessary. Nanoscale zero-valent metallic particles (S-NZVI) were prepared from steel pickling waste liquor by chemical deposition and used to remove BDE209 in a water/tetrahydrofuran (4/6, v/v) solution. Nanoscale zero-valent iron particles (NZVI), nanoscale zero-valent and Ni/Fe particles were also prepared. These particles were characterized by BET, TEM, SEM , XRD , and EDS. The crystalline structure of S-NZVI was different from NZVI . However, the BET surface area of S-NZVI was the same as that of NZVI. The degradation rate of BDE209 by S-NZVI followed a pseudo-first order kinetics . The removal efficiency increased with increasing metal dosage but decreased with increasing initial BDE209 concentration. High reaction rate was observed at more water content solvent, indicating that hydrogen ion was the driving force of reaction. Comparing different nanoscale Fe-based materials, the removal of BDE209 by S-NZVI was found more effective than NZVI. By evaluating the cost and the significance of reclaimable iron resource, S-NZVI was found to give better compensation compared to other metals. Thus, the degradation of BDE209 by S-NZVI is both feasible and efficient.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
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2024
·
IF 4.3
Gaoke Dong,Bing Hu,Chen Chen,Hailong Yu,Qiuju Han,Wenzhi Wu
Organic–inorganic metal halides have attracted great attention due to their tunable structural and spectroscopic properties. Here, two organic–inorganic hybrid manganese bromides, (TEMA)2MnBr4 (TEMA = triethylmethylammonium) and (TEBA)2MnBr4 (TEBA = benzyltriethylammonium), are synthesized using the evaporation crystallization method. Following a heat-induced phase transition at 363 K, the structure and optical properties of (TEMA)2MnBr4 change but return to their initial state upon cooling to room temperature, as confirmed by X-ray diffraction, photoluminescence (PL), and Raman spectra. Meanwhile, (TEBA)2MnBr4, with a larger Mn–Mn distance, exhibits a higher photoluminescence quantum yield of 98.1% and greater thermal quenching temperature. However, due to the poorer thermal stability of the organic cation, the crystal melts at 400 K, leading to fluorescence quenching. White LEDs based on (TEMA)2MnBr4 and (TEBA)2MnBr4 are successfully fabricated with color rendering indices of 97.4 and 97.2, respectively. The investigation provides deep insights into the structural and optical properties of (TEMA)2MnBr4 and (TEBA)2MnBr4, advancing research for LED display design by tuning organic cations.
研究领域:
材料科学
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光电技术
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固体化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
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2016
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IF 7.145
Lei Lv,Xiaofen Wang,Xinlong Wang,Lei Yang,Tao Dong,Zhou Yang,Hui Huang
Novel tellurophene-based n-type copolymers are synthesized and characterized with thermal analysis, electrochemistry, optical spectroscopy, and DFT calculations. The copolymers demonstrate reversible interactions with bromine. Through tuning of the building blocks and alkyl chains together with device engineering, the maximum power conversion efficiency of all-polymer solar cells improves from 2.8 to 4.3%, which is supported by photoluminescence, atomic force microscopy, transmission electron microscopy, the space charge limit current method, and exciton dynamic studies. These results suggest that tellurophene-based n-type copolymers are promising electron acceptors for organic solar cells and potential sensor materials for bromine detection.
研究领域:
材料科学
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有机光电
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
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2022
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IF 3.571
He Cheng,Jie Song,Zhiyi Yao
Rocuronium is widely used in surgery as a neuromuscular relaxant, but it has been difficult to accurately control its specific dosage in clinical operation. Therefore, the development of fast and instant rocuronium detection methods has important application value for reducing risks and safeguarding health. In this study, N, N, N -trimethyl-4-(pyrene-1-butyl)-ammonium bromide (PyBTA) was designed as a probe to detect rocuronium rapidly. The method relied on replacing PyBTA in sugammadex with rocuronium to induce changes in fluorescence intensity of PyBTA, thereby realizing quantitative detection. Its sensing performance and detection mechanism were explored systematically by spectroscopy. The linear range of this method was 0.5–10 μM and the detection limit of it was 0.3 μM. In addition, we confirmed that the host-guest interaction among PyBTA, sugammadex, and rocuronium was mainly driven by electrostatic and hydrophobic interactions.
研究领域:
药理学
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分析化学
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生物医学工程
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
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2016
·Vol. 183
·期 12
·3101-3109
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IF 4.831
Li Shuhuai,Liu Chunhua,Yin Guihao,Luo Jinhui,Zhang Zhenshan,Xie Yixian
The authors describe an electrochemical sensor for the neonicotinoid insecticide imidacloprid (IMI) based on Pt-In catalytic nanocomposite film and Bromophenol blue amplification. The Pt-In nanocomposite film was deposited on the surface of a modified glassy carbon electrode. The composite molecularly imprinted polymer (MIP) was prepared by electro-polymerization using bromophenol blue doped o -aminophenol as functional monomer and 4-tert-butylcalix[6]arene-IMI supramolecular inclusion complex as template molecule. The experimental results showed that the current intensity of IMI was clearly amplified in the potential range from −0.3 to −1.8 V, because of the double amplification, based on the Pt-In film and Bromophenol blue catalysis. Moreover, the double recognition ability of the sensor, which relied on the MIP and the vacuum structure of 4-tert-butylcalix[6]arene, effectively increased the specific recognition performance. The feasibility of its practical applications has been demonstrated by the analysis of vegetable samples.
A supramolecular imprinted electrochemical sensor for imidacloprid determination was prepared based on Pt-In nanocomposite film and bromophenol blue amplification. Because of the advantages of the specific recognition sites in MIPs and supramolecular chemistry, the sensor showed good selectivity for imidacloprid.
研究领域:
分析化学
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环境科学
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农业科学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED MICROBIOLOGY
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2017
·Vol. 122
·期 3
·676-685
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IF 2.099
Lin W.,Guan X.,Cao J.,Niu B.,Chen Q.
AimsThis study focuses on the bactericidal mechanism of the new combination of disinfectant glutaraldehyde‐didecyldimethylammonium bromide (GA‐DDAB) against Escherichia coli.Methods and ResultsEscherichia coli were exposed to GA‐DDAB, and assays for cell morphology, K+ and Ca2+ leakage, H+‐ATPase activity and DNA degradation were performed. GA‐DDAB damaged the cell wall and disrupted cell‐membrane integrity. Leakage of K+ and Ca2+ increased, resulting in significantly lower intracellular concentrations within 60 min of treatment. In addition, H+‐ATPase was inactivated and DNA was degraded.ConclusionsLeakage of intracellular components indicated that GA‐DDAB damaged the cell membrane of E. coli. This may have caused the observed disruption in equilibria of metal ions, inactivation of H+‐ATPase, and DNA damage.Significance and Impact of the StudyUsing a low concentration of GA and DDAB, a new combination disinfectant was developed. GA‐DDAB displayed higher antimicrobial activity than treatment with GA or DDAB alone. Therefore, GA‐DDAB may be a more cost‐effective and efficient antimicrobial agent than others in use today. Furthermore, this study provided a paradigm for developing high‐efficiency disinfectant to help address the growing problem of bacterial resistance.
研究领域:
微生物学
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消毒与抗菌研究
✓ 已验证
DOI
PubMed
高影响因子
Frontiers in Pharmacology
·
2018
·
IF 3.831
Yong Tianqiao,Chen Shaodan,Xie Yizhen,Chen Diling,Su Jiyan,Shuai Ou,Jiao Chunwei,Zuo Dan
Ganoderma applanatum (G. applanatum) dispels wind to eliminate dampness and exhibited nephron- and liver-protective effects as noted in Chinese herbal classic literature; it might also affect hyperuricemia. Therefore, we examined the hypouricemia effects and mechanisms underlying G. applanatum on chemical-induced hyperuricemia in mice. Ethanol (GAE) and water (GAW) extracts were prepared by extracting G. applanatum in ethanol (GAE), followed by bathing the remains in water to yield GAW. GAE and GAW were administered orally at different doses to hyperuricemia mice, while allopurinol and benzbromarone served as positive controls. Both GAE and GAW showed remarkable hypouricemia activities, rendering a substantial decline in the SUA (serum uric acid) level in hyperuricemia control (P < 0.01). Moreover, the urine uric acid (UUA) levels were enhanced by GAE and GAW. In contrast to the evident renal toxicity of allopurinol, GAE and GAW did not show a distinct renal toxicity. Almost no suppressing effect was observed on the XOD activities. However, compared to the hyperuricemia control, OAT1 was elevated remarkably in mice drugged with GAE and GAW, while GLUT9 was significantly decreased. Similar to benzbromarone, GAE decreased the URAT1 protein levels significantly (P < 0.01), while GAW did not display a similar effect. GAE and GAW downregulated the level of CNT2 proteins in the gastrointestinal tract of hyperuricemia mice. Thus, G. applanatum produced outstanding hypouricemic effects, mediated by renal OAT1, GLUT9, and URAT1 and gastrointestinal CNT2 that might elevate urine uric secretions and decline in the absorption of purine in the gastrointestinal tracts. G. applanatum showed little negative influence on inner organs. By docking screening, four top-ranked compounds were identified that necessitated further investigation.Compounds: potassium oxonate, hypoxanthine, allopurinol, benzbromarone.
研究领域:
药理学
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医学
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分子生物学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Energy Chemistry
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2020
·
IF 7.216
Jin-Feng Liao,Ya-Ting Cai,Jun-Yan Li,Yong Jiang,Xu-Dong Wang,Hong-Yan Chen,Dai-Bin Kuang
The optoelectronic performance of CsPbBr 3 nanocrystal (NC) has been dramatically limited by the severe charge carrier recombination and its narrow light absorption range, which are anticipated to be resolved via coupling with plasmonic Au nanoparticle (NP). In view of this, CsPbBr 3 –Au nanocomposite is fabricated and further employed as a concept model to study the electronic interaction between perovskite NC and Au NP for the first time. It has been found that the excitation-wavelength dependent carrier transfer behavior exists in CsPbBr 3 –Au nanocomposite. Upon illumination with visible light ( λ >420 nm), photo-generated electrons in CsPbBr 3 can inject into Au with an electron injection rate and efficiency of 2.84 × 10 9 s −1 and 78%, respectively. The boosted charge separation is further translated into a 3.2-fold enhancement in CO 2 photocatalytic reduction activity compared with pristine CsPbBr 3 . On the other hand, when solely exciting Au NP with longer wavelength light ( λ >580 nm), the localized surface plasmon resonance (LSPR) induced hot electrons in Au NPs can transfer to CsPbBr 3 NC and further participate in photocatalytic reaction towards CO 2 reduction. The present study provides new insights into preparing plasmonic nanostructure to enhance the performance of perovskite based optoelectronic devices.
研究领域:
材料科学
·
光化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Junjie Lou,Bing Cai,Yihui Wu,Yinhua Lv,Xinhang Liu,Wen-Hua Zhang,Yong Qin
All-bromide inorganic perovskite CsPbBr 3 has attracted enormous attention due to its excellent stability against thermal and high humidity environmental conditions. The wide bandgap of CsPbBr 3 (2.3 eV) makes it a promising material for tandem and semitransparent solar cells. However, cesium based inorganic perovskite solar cells (PSCs) usually suffer from low device performance because of their imperfect film quality and mismatched energy levels with respect to charge transport materials. Herein, we describe a post-treatment strategy for CsPbBr 3 films using formamidinium bromide (FABr). With this protocol, FA + can partially substitute Cs + in the bulk phase of CsPbBr 3 , improving energy level alignment and enhancing charge extraction. Meanwhile, grain boundaries could be effectively passivated by a second phase (FA y Cs 4−y PbBr 6 ) generated in the ion exchange reaction . As a result, FABr-treated PSC exhibits a champion power conversion efficiency (PCE) of 8.25%, much higher than the pristine device with PCE of 6.74%. This work provides a feasible method to improve device performance of CsPbBr 3 PSCs while maintaining their outstanding stability.
研究领域:
材料科学
·
光伏技术
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 135
·期 13
·46036
·
IF 1.86
Yanfang Hu,Weiqian Ma,Meilin Tao,Xueyan Zhang,Xiaohong Wang,Xiaoyu Wang,Li Chen
Herein, we present a strategy for supporting bromine as a catalyst for the oxidation of sulfides. In this strategy, branched poly(ethylene imine) was first decorated by magnetic oxide and then used to support liquid bromine to obtain solid polymeric bromine (M@PEI@Br) nanoparticles. Compared with free bromine, the stability of the M@PEI@Br nanoparticles improved obviously. The oxidation of thioanisole to methyl phenyl sulfoxide was chosen as a reaction model to evaluate the catalytic activity of the M@PEI@Br nanoparticles. All of the obtained results verify that the M@PEI@Br nanoparticles exhibited excellent catalytic efficiency and could accelerate the oxidation process under solvent-free conditions at room temperature; this highlighted the potential of decorated polymers to support active and unstable small-molecule organic catalysts. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46036.
研究领域:
催化化学
·
高分子材料
·
纳米科技
·
有机合成
·
绿色化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）