International Journal of Minerals Metallurgy and Materials
·
2018
·Vol. 25
·期 3
·310-314
·
IF 1.261
Li Shi-na,Ma Rui-xin,Wang Cheng-yan
The Cu 2 MoS 4 nanoparticles were prepared using a relatively simple and convenient solid-phase process, which was applied for the first time. The crystalline structure, morphology, and optical properties of Cu 2 MoS 4 nanoparticles were characterized using X-ray diffraction, X-ray photoelectron spectroscopy, field emission scanning electron microscopy, and UV-vis spectrophotometry. Cu 2 MoS 4 nanoparticles having a band gap of 1.66 eV exhibits good photocatalytic activity in the degradation of methylene blue, which indicates that this simple process may be critical to facilitate the cheap production of photocatalysts.
研究领域:
材料科学
·
环境科学
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高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Yuxuan Zhou,Jiaqi Shi,Yiping Li,Tao Long,Xin Zhu,Cheng Sun,Yuting Wang
Bis(2-chloroethyl) ether (BCEE) has become one of the most frequently detected chlorinated ether contaminants in the US and Europe, and is classified as a B2 carcinogen. In this study, the degradation rate of BCEE by mercury lamps , xenon lamp and electromagnetic induction electrodeless lamp (EIEL) activated persulfate were compared, and EIEL activated persulfate was confirmed to have higher degradation capability and lower energy consumption. In this sense, the degradation kinetics and mechanism in EIEL system were further investigated. The degradation reaction followed pseudo first-order, and the removal rate of BCEE exceeded 95% in 60 min when the initial pH, the concentration of BCEE and Na 2 S 2 O 8 were 3, 4 mg L −1 and 15 mM, respectively. Presence of inorganic anions and humic acids would reduce the degradation rate constant. In accordance with the results of electron paramagnetic resonance and quenching experiments, SO 4 − · was dominant in the acidic regime and OH· was dominant in the alkaline regime. Meanwhile, OH· had higher degradation rate with BCEE when initial pH was 7. Seven degradation products were identified and the reaction pathways included OH· substitution and free radical coupling. Although the total organic carbon was eliminated slowly during the degradation of BCEE, the predicted toxicity of most degradation products to Fathead minnow , Daphnia magna and oral rat were lower than BCEE.
研究领域:
环境科学
·
化学
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DOI
PubMed
高影响因子
Chemical Engineering and Processing-Process Intensification
·
2023
·
IF 4.3
Yu Zhong,Kama Huang,Nanya Zhong,Yijun Wang,Wenqi Chen
The traditional cathode low-pressure Hg lamp is the most mainstream UV light source in degrading organic wastewater but with significant limitations of short lifetime, environmental hazard and poor degradation efficiency. Here, we evaluate a self-designed microwave-driven ZnI 2 deep-UV lamp on degrading Rhodamine B (RhB), methylene blue (MB), and p-nitrophenol (PNP). An electrodeless Hg lamp was used as control. First we investigated the emission wavelength, spatial radiation distribution, the effect of power on radiation intensity, and relative permittivity of ZnI 2 lamp. Then the degradation rate, kinetics and energy yield on degrading RhB, MB and PNP as well as the cost were studied. ZnI 2 lamp showed shorter wavelengths, approaching UVC radiation intensity, approaching attenuation factor and higher microwave coupling capability to Hg lamp. After treatment with ZnI 2 lamp for 10, 6 and 15 min, 5 mg/L of RhB, MB and PNP can reach 100% removal rates. Moreover, higher degradation rate and kinetic constants of ZnI 2 lamp for 3 compounds than the Hg lamp in this paper and in the literature were achieved. With the assistance of microwave and properties of environmental-friendly and low cost, ZnI 2 lamp provides a new alternative to traditional Hg lamp and wastewater photochemical treatment method.
研究领域:
环境科学
·
光化学技术
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高影响因子
Advanced Science
·
2026
·
IF 14.1
Zetong Li,Wei He,Guangji Wang,Jingwei Zhang,Zhimin Chai,Xinchun Lu
Metal oxides exhibit high transparency across the visible spectrum, making them challenging to anneal via flash lamp annealing (FLA). Whether such materials can effectively absorb light and self‐heat remains debated. Conventional workarounds often involve light‐absorbing layers; however, these approaches introduce complexity to the fabrication process and impose limitations on device architecture. Here, we introduce a FLA strategy that enables conversion of metal oxide sol–gels into functional oxides per layer within tens of seconds on both silicon and ultra‐thin glass (UTG) substrates—without additional light‐absorbing layers—by employing a mullite chuck. Finite element analysis (FEA) results indicate that the gel‐to‐oxide transformation is initiated by direct light absorption within the metal oxides. The low thermal conductivity of mullite restricts heat dissipation, facilitating a temperature rise in the metal oxide layers with increasing pulse count and promoting complete conversion. FEA further reveals that metal oxides on UTG attain lower temperatures than those on silicon, due to greater heat dissipation into the UTG substrate. We demonstrate all‐solution‐processed thin‐film transistors and functional logic gates using FLA‐processed metal oxides. This approach shortens fabrication time by two orders of magnitude without sacrificing device performance, highlighting its potential for high‐throughput production of complex integrated circuits. A flash lamp annealing strategy using a mullite chuck enables rapid conversion of sol–gels to metal oxides on silicon and ultra‐thin glass without extra light‐absorbing layers. Direct light absorption initiates the transformation, and the low thermal conductivity of mullite promotes heat accumulation. All‐solution‐processed electronics fabricated in this way shorten processing time by two orders of magnitude while maintaining performance.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yayun Jiang,Youwei Li,E. Jianfei,Qi Xin,Yongyi Chen,Qiang Wen,Yang He,Gang Mai
Group B Streptococcus (GBS) poses a significant health risk to mothers and newborns, requiring rapid and accurate detection for effective treatment. Traditional methods, such as bacterial culture and PCR, are time-consuming and procedurally complex. Herein, we developed a visual nucleic acid assay platform by combining loop-mediated isothermal amplification (LAMP) with LAMP-responsive carbon dots—polyethyleneimine carbon dots (PEI-CDs)—for GBS detection. In a positive LAMP reaction (with target DNA), the negatively charged amplification products (DNA and magnesium pyrophosphate) interact with positively charged fluorescence PEI-CDs via electrostatic adsorption to form a large fluorescent precipitate, while in a negative reaction, PEI-CDs remain dispersed. This visual distinction allows for the straightforward identification of GBS presence. To prevent contamination, PEI-CDs are integrated into the reaction tube lid. This visual detection platform achieves a detection limit of 10 2 copies/μL for GBS within 31 min, demonstrating high sensitivity and rapid visual readout. The platform shows significant potential for clinical practice in nucleic acid diagnostics, with versatility to detect other pathogens through primer substitution.
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JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Manyan Qiu,Zhiyu Yuan,Nan Li,Xinyan Yang,Xianlong Zhang,Yujun Jiang,Qianyu Zhao,Chaoxin Man
Sensitive detection and point-of-care test of bacterial pathogens is of great significance in safeguarding the public health worldwide. Inspired by the characteristics of horseradish peroxidase (HRP), we synthesized a hybrid nanoflower with peroxidase-like activity via a three-component self-assembled strategy. Interestingly, the prepared nanozyme not only could act as an alternative to HRP for colorimetric biosensing, but also function as a unique signal probe that could be recognized by a pregnancy test strip. By combining the bifunctional properties of hybrid nanoflower, isothermal amplification of LAMP, and the specific recognition and non-specific cleavage properties of CRISPR/Cas12a system, the dual-readout CRISPR/Cas12a biosensor was developed for sensitive and rapid detection of Salmonella enterica . Moreover, this platform in the detection of Salmonella enterica had limits of detection of 1 cfu/mL (colorimetric assay) in the linear range of 10 1 –10 8 cfu/mL and 10 2 cfu/mL (lateral flow assay) in the linear range of 10 2 –10 8 cfu/mL, respectively. Furthermore, the developed biosensor exhibited good recoveries in the spiked samples (lake water and milk) with varying concentrations of Salmonella enterica . This work provides new insights for the design of multifunctional nanozyme and the development of innovative dual-readout CRISPR/Cas system-based biosensing platform for the detection of pathogens. Environmental implication The presence of bacterial pathogens is pervasive in the environment and poses a significant threat to public health safety. To prevent foodborne disease outbreaks, it is crucial to develop sensitive and reliable pathogen detection strategies for rapid and on-site detection of pathogens in both environmental and food samples. Herein, we developed a novel dual-readout CRISPR/Cas biosensing platform based on nanozyme with bifunctional properties and loop-mediated isothermal amplification (LAMP) for highly sensitive and on-site detection of Salmonella enterica in lake water and milk samples. The proposed method has good stability and high accuracy in the detection of Salmonella enterica .
研究领域:
生物技术
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纳米技术
·
病原体检测
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生物传感器
·
即时诊断
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DOI
PubMed
高影响因子
PANCREAS
·
2010
·Vol. 39
·期 8
·1231
·
IF 2.733
Chen SuYu,Shi Hong,Zou Xiaoping,Luo Hesheng
Objectives: The role of prophylactic ulinastatin in the prevention of post-endoscopic retrograde cholangiopancreatography (ERCP) pancreatitis is debated. A meta-analysis of all published randomized clinical trials was performed to evaluate the efficacy of ulinastatin on post-ERCP pancreatitis. Methods: Searches were conducted in multiple databases composed of PubMed, EMBASE, the Cochrane Library, the Science Citation Index Expanded, and the China National Knowledge Infrastructure series full-text database. Primary outcome was post-ERCP pancreatitis, with or without hyperamylasemia. Results: Seven randomized clinical trials fulfilling the inclusion criteria were selected for meta-analysis, 5 comparing ulinastatin with placebo and 2 for ulinastatin versus gabexate. The incidence of post-ERCP pancreatitis was reduced by ulinastatin (odds ratio, 0.53; 95% confidence interval, 0.31-0.89; P = 0.02; test for heterogeneity: I 2 = 0%; P = 0.51), so was the event of hyperamylasemia (odds ratio, 0.42; 95% confidence interval, 0.30-0.59; P < 0.00001; test for heterogeneity: I 2 = 13%; P = 0.33). Subsequent sensitivity and subgroup analyses produced conflicting results. Conclusions: Ulinastatin shows to be of value on preventing post-ERCP pancreatitis and hyperamylasemia for patients in average risk, when given intravenously at a dose of not less than 150,000 U, just before ERCP. More high-quality trials are needed for further confirmation.
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高影响因子
APPLIED CATALYSIS A-GENERAL
·
2013
·
IF 3.41
Wei Zhai,Fengqiang Sun,Wei Chen,Zizhao Pan,Lihe Zhang,Shaohua Li,Shuilan Feng,Yiyi Liao,Weishan Li
Octahedral Cu 2 O particles were prepared on an indium-tin oxide glass via electrodeposition and were employed in the catalytic degradation of p -nitrophenol in the presence of H 2 O 2 . Under irradiation of a warm visible-light source, tungsten halogen lamp, Cu 2 O particles not only acted as a photocatalyst, but might also act as a thermal-catalyst to induce the decomposition of H 2 O 2 and produce O 2 at higher temperatures. The photogenerated electrons and holes could react with H 2 O 2 , O 2 , and H 2 O to produce abundant OH radicals, resulting in the effective oxidation of p -nitrophenol. High-performance liquid chromatography measurements of degradation intermediates showed that p -nitrophenol was first decomposed into hydroquinone and benzoquinone and then mineralized. The degradation efficiency was dependent on electrodeposition time, light intensity, H 2 O 2 amount, and solution temperature. This catalyst could be easily recycled and used in the efficient degradation of other phenolic compounds.
研究领域:
环境科学
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材料科学
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高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Fuyuan Huang,Yayun Jiang,Qiaoli Wu,Chaochuan Zheng,Shen Huang,Huan Yang,Guangxin Xiang,Laibao Zheng
Loop-mediated isothermal amplification (LAMP) is a rapid and sensitive nucleic acid testing method for pathogen detection, yet the absence of a straightforward readout strategy remains challenging. We've successfully designed polyethyleneimine-stabilized gold nanoclusters (PEI-AuNCs) as a cationic AuNCs indicator tailored for distinguishing LAMP results, enabling direct visual inspection under UV light. Positive LAMP reactions with PEI-AuNCs, in combination with magnesium pyrophosphate crystals, yield red-fluorescent bulk precipitates visible to the naked eye. To address contamination concerns, we introduced a one-pot reaction by incorporating AuNCs into the lid recess. This one-pot LAMP assay demonstrates exceptional detection capability, identifying Salmonella enterica at concentrations as low as 10 1 CFU/mL within approximately 50 min, excluding nucleic acid extraction. The platform's versatility, achieved through customizable primers, positions it as a promising molecular diagnostic tool for rapid and visual pathogen detection across scientific disciplines.
研究领域:
分子诊断
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纳米技术
·
病原体检测
·
生物技术
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DOI
PubMed
高影响因子
WATER RESEARCH
·
2024
·
IF 11.4
Yu-Jia Nong,Qian-Yuan Wu,Yun-Peng Wu,Ju-Won Lee,Min-Yong Lee,Wen-Long Wang
The KrCl-excimer lamp, emitting far-UVC light at 222 nm (UV222), offers a promising alternative to conventional UVC light at 254 nm (UV254) for the photolysis of organic pollutants and the activation of radical sensitizers. This study was aimed to investigate the efficiencies of UV222 in the treatment of halogenated aromatics, focusing on its performance in degradation, dechlorination and detoxification. Chlorophenols, representative recalcitrant and toxic halogenated aromatics, were used as target pollutants. The pathways of direct photolysis, photooxidation and photoreduction under UV222 illumination were compared. UV222 outperformed UV254 in photolyzing chlorophenols (1.4−34.1 times faster), especially protonated chlorophenols, due to substantially higher UV absorption (17.1−108.0 times) and quantum yields (2.1−3.4 times). The quantum yields of chlorophenols were influenced by the inducive electron-withdrawing effect of Cl-substitutes. Moreover, UV222 improved the dechlorination of chlorophenols to 95 % compared to 60 % by UV254. The introduction of radical sensitizer (e.g., H 2 O 2 , nitrate, and sulfite) reduced 4-chlorophenol photolysis by competing for UV222 absorption, though the sensitizers partially increased radical oxidation via generating • OH or e aq − . UV222 photolysis of 4-chlorophenol increased the toxicity by 88.6 times through forming toxic intermediates (e.g., hydroquinone and resorcinol). Notably, • OH and e aq − (i.e., UV222/H 2 O 2 and UV222/sulfite) increased the dechlorination and • OH (i.e., UV222/H 2 O 2 ) detoxified the mixture solution. Moreover, UV222 photolysis remained effective for 4-chlorophenol removal in real paper-mill wastewater, indicating the potential application of KrCl* lamp UV222.
研究领域:
环境科学
·
化学工程
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PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Yu-E Gao,Qing Huang,Yue Huang,Li-Xia Yan,Wen-Long Wang,WenFeng Zhao,Yong-Wei Feng,Xiao-Dong Huang,Yi Zhang
Antibiotic resistance genes (ARGs) are markers of drug-resistant pathogens, monitoring them contribute to prevent resistance to drugs. The detection methods for ARGs including PCR and isothermal amplification are sensitive and selective. However, it may take several hours or cannot be used on spot. Here, a detection method was developed based on a novel nanoparticle-mediated light-driven (LD) loop-mediated isothermal amplification (LAMP) combining with test strips, and a commonly found methicillin-resistant gene mecA was analyzed to verify the method. Under laser irradiation, gold nanoparticles produced localized surface plasmon resonance. Therefore, they provided both light-induced electrons and localized heat, the former acted as the catalyst of LD-LAMP and the latter as the energy supply. The mecA was amplified, producing numerous double-labeled amplicons. The LD-LAMP was three times as efficient as metal-bathed LAMP. A visual test strip (TS) was designed based on sandwich lateral flow chromatography, reading a LAMP result within 5~10 min. The method has a detection limit of 13.8 copies/μL, with a linear range of 13.8 copies/μL~1.38×10 7 copies/μL. The LD-LAMP TS was applied to the on-site detection of mecA in milk samples. The results were consistent with qPCR, and total detection time reduced from 1 h by qPCR to 20~25 min by LD-LAMP TS.
研究领域:
分子生物学
·
病原微生物学
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分析化学
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PubMed
高影响因子
Crystals
·
2022
·Vol. 12
·期 10
·1382
·
IF 2.67
Xinhua Chen,Qingliang Xu,Fayaz Hussain,Chen Yang,Weiqin Sheng,Xinjiang Luo,Bing Liu,Shikuan Sun,Dawei Wang,Kaixin Song
Red LEDs with a high color purity and high color rendering index are often used to compensate for the lack of red-light components in current white LEDs. Therefore, the new type of garnet-structured high color purity red phosphor Y2−xSrAl4SiO12: xEu3+was synthesized by the solid-state method. The band gap structure of the host matrix was studied through the DFT calculation and found that the matrix belongs to a direct band gap structure with a band gap size of 4.535ev. The phosphor exhibits a wide excitation spectrum under the monitoring of 710 nm. The strongest excitation wavelength is 393 nm, and it exhibits bright red light under the excitation of 393 nm, and the emission peak positions are located at 570 nm, 597 nm, 613 nm, 650 nm, 710 nm and 748 nm, respectively, which are attributed to the5D0→7Fjof Eu3+(j = 0–5) electronic transitions. In the crystal structure of Y2SrAl4SiO12, Eu3+occupies a symmetry site. The compositional changes and thermal studies found favorable at 20% mol. At this concentration, the luminescence intensity gradually weakened due to the Eu3+electric multi-level interaction. It is worth noting that the emission intensity of Y2SrAl4SiO12: 20%Eu3+at 433 K can be maintained to 92% of that at 293 K. Finally, we combined it with the NUV chip and packaged it into a red LED with a color purity of up to 90% and a correlated color temperature of 1492 K. The high purity, low color temperature and thermal stability indicate that it has a place in LED applications.
研究领域:
材料科学
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光学工程
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固体化学
·
半导体物理
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发光材料
·
照明技术
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DOI
高影响因子
危险品化学品经营许可证（带存储）