MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Weidong Qin,Hongyuan Tian,Zhao Meng,Zhanqiu Tang,Junhua Wang,Zhenglong Wu
We synthesized excitation-dependent fluorescent carbon dots (CDs) through a one-pot hydrothermal process using mango pulps as precursors and discovered that the ozone-treated CDs (O 3 -CDs) could stabilize the diimine form of oxidized 3,3′,5,5′-tetramethylbenzidine (diimine oxTMB). A dual-mode colorimetry and ratiometric fluorescence method using O 3 -CDs and TMB as probes was developed for detecting sarcosine. During measurement, sarcosine was selectively oxidized by sarcosine oxidase, and the resulting hydrogen peroxide was catalyzed by horseradish peroxidase to convert TMB into a blue-colored oxidized product. Under acidic conditions, this product was further oxidized to diimine oxTMB, which exhibited an absorbance band at 450 nm. Due to the inner filter effect, the fluorescence emission of O 3 -CDs at 450 nm was significantly quenched by the diimine oxTMB, while the emission at 550 nm was utilized as a reference signal. The dual-mode method selectively detected sarcosine, with detection limits of 0.034 µM and 0.096 µM for colorimetry and ratiometric fluorescence detection, respectively. The ratiometric fluorescence sensing strategy provided a built-in correction to prevent errors originating from environmental variabilities. Moreover, the stabilization of diimine oxTMB mediated by O 3 -CDs improved the detection performance of the method. This study enriches the library of luminescent CDs through the rational utilization of natural biomass and introduces a novel approach to improve the analytical performance of dual-mode detection.
研究领域:
分析化学
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生物传感
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材料科学
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产品关联
DOI
高影响因子
Separations
·
2025
·Vol. 12
·期 7
·179
·
IF 2.7
Jie Wang,Meiyi Hu,Ziyi Zhang,Shaoping Tong
The widespread use of plastics in our daily life has caused many health problems. Conventional water treatment processes have low efficiency in the removal of microplastics from water. In this work, we investigated the efficiency of ozonation pretreatment followed by flocculation to remove microplastics from water. After the ozonation pretreatment, it was found that microplastic removal could be significantly enhanced by flocculation from 40% to 91%. The characterization results show that the ozonation-pretreated microplastics had rougher surfaces and larger amounts of surface hydroxyl groups and carbonyls, which might be responsible for their increased removal. However, there was still a small amount of microplastics that had not been removed. They floated on the surface of the solution and could not be effectively oxidized by ozone, thus not changing their surface properties. This further confirms the importance of hydroxyl groups.
研究领域:
环境科学
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水处理
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材料科学
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产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2015
·
IF 4.494
Binzhe Sun,Lian Duan,Gege Peng,Xiaoxia Li,Aihua Xu
To improve the production of glucose from cellulose, a simple and effective route was developed. This process uses a combination of a step of cellulose dissolution in aqueous NaOH/urea solution and then regeneration with water, followed by an acid hydrolysis step under microwave irradiation. The method is effective to obtain glucose from α-cellulose, microcrystalline cellulose, filter paper, ramie fiber and absorbent cotton. Increased with the acid concentration the glucose yield from hydrogel hydrolysis increased from 0.42% to 44.6% at 160 °C for 10 min. Moreover, the ozone treatment of cellulose in NaOH/urea solution before regeneration significantly enhanced the hydrolysis efficiency with a glucose yield of 59.1%. It is believed that the chains in cellulose hydrogel are relatively free approached, making that the acids easily access the β-glycosidic bonds.
研究领域:
生物化学
·
可再生资源技术
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产品关联
DOI
PubMed
高影响因子
FERROELECTRICS
·
2018
·
IF 0.728
Rui Yang,Qinghua He,Chuhui Wang,Shuqing Sun
We report the surface modification of polystyrene microsphere by ozone treatment. The effects of the ozone treatment on the surface properties of polystyrene microsphere are probed using a series of measurements, including Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy(XPS), scanning electron microscope(SEM), fluorescence microscope. As a result of above measurements, the surface of the sample contains a large number of carboxyl and hydroxy (mainly –COOH) groups. In addition, the polystyrene microsphere successfully connected with amino quantum dots which demonstrates the existence of functional groups. A major conclusion that can be drawn from the results and analysis described in this work is that the ozone treatment provides a feasible method for surface modification of polystyrene microsphere in the use of biological testing. The method is simple and universal, and the operation is simple and convenient to modify the carboxyl group.
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
Journal of Environmental Sciences
·
2020
·
IF 4.302
Qiufeng Lin,Feilong Dong,Cong Li,Junkui Cui
Algal organic matter (AOM), including extracellular organic matter (EOM) and intracellular organic matter (IOM) from algal blooms, is widely accepted as essential precursors of disinfection byproducts (DBPs). This study evaluated the effect of ozonation or ozone combined with activated carbon (O 3 -AC) treatment on characteristic alternation and DBP formation with subsequent chlorination of Chlorella sp.. The effects of pH and bromide concentration on DBP formation by ozonation or O 3 -AC treatment were also investigated. Results showed that the potential formation of DBPs might be attributed to ozonation, but these DBP precursors could be further removed by activated carbon (AC) treatment. Moreover, the formation of target DBPs was controlled at acidic pH by alleviating the reactions between chlorine and AOM. Besides, the bromide substitution factor (BSF) value of trihalomethanes (THMs) from EOM and IOM remained constant after AC treatment. However, THM precursors could be significantly decreased by AC treatment. The above results indicated that O 3 -AC was a feasible treatment method for algal-impacted water.
研究领域:
环境科学
·
水处理工程
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产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Xin-Yang Zhang,Ye Du,Yao Lu,Wen-Long Wang,Qian-Yuan Wu
Ozonation plays an important role in wastewater treatment for reuse. However, the toxicity of wastewater treated with ozone considerably increases with bromide (Br − ) concentration >100 μg/L. Nine newly identified brominated disinfection byproducts (Br-DBPs) that are highly toxic in ozonated Br − -containing wastewater were found in our recent work, including 2-bromostyrene, 1-bromo-1-phenylethylene, 2-bromobenzaldehyde, 3-bromobenzaldehyde, 4-bromobenzaldehyde, 2-bromophenylacetonitrile, 3-bromophenylacetonitrile, 4-bromophenylacetonitrile, and 2,4,6-tribromophenol. In the present study, the formation and calculated toxicity index of the nine newly identified Br-DBPs were evaluated. The correlations between the water quality index and the formation of nine Br-DBPs were also analyzed. With the increase of ozone dosage, the concentrations of bromostyrenes, 3-bromobenzaldehyde, 4-bromobenzaldehyde, 2-bromophenylacetonitrile, and 2,4,6-tribromophenyl in the ozonated samples gradually increased. With the increase of Br − concentration, the concentrations of bromostyrene, 2-bromobenzaldehyde, and 2,4,6-tribromophenol gradually increased. With the increase of NH 4 + concentration, the concentrations of bromophenylacetonitriles gradually increased. Among the nine Br-DBPs, the bromophenylacetonitriles and 2,4,6-tribromophenol contributed the most to the cytotoxicity index, 2,4,6-tribromophenol and bromostyrenes contributed the most to the genotoxicity index, and bromophenylacetonitriles and bromostyrenes contributed the most to the oxidative damage index. The dissolved organic carbon levels strongly correlated with the formation of 3-bromophenylacetonitrile and 4-bromophenylacetonitrile, and the fluorescence I–V region intensity integral was correlated with the formation of 4-bromobenzaldehyde and 2,4,6-tribromophenol. The results of the present study clarified the formation potential of the nine widely existing newly identified Br-DBPs, confirmed the high calculated toxicity indices, and are of great value for future research on Br-DBPs.
研究领域:
环境科学
·
毒理学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Yonglin He,Fayin Ye,Jianming Tao,Zehua Zhang,Guohua Zhao
Ozonation is an efficient method for improving the technical performance of some starches, but the feasibility of its use for sweet potato starch remains unknown. The effects of aqueous ozonation on the multi-scale structure and physicochemical properties of sweet potato starch were explored. Structurally, ozonation did not generate significant alterations at the granular level (size, morphology, lamellar structure, and long-range and short-range ordered structures), but led to tremendous changes at the molecular level, including converting hydroxyl groups to carbonyl and carboxyl groups and depolymerizing starch molecules. These structural changes resulted in prominent alternations in the technological performance of sweet potato starch, such as increases in water solubility and paste clarity and decreases in water absorption capacity, paste viscosity, and paste viscoelasticity . For these traits, their amplitudes of variation elevated when the ozonation time was extended and peaked at the longest ozonation time (60 min). The greatest changes in paste setback (30 min), gel hardness (30 min), and the puffing capacity of the dried starch gel (45 min) were observed at moderate ozonation times. In summary, aqueous ozonation is a new method for fabricating sweet potato starch with improved functionality.
研究领域:
食品科学
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分子生物学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2017
·Vol. 5
·期 40
·10652-10659
·
IF 5.256
Weiyao Wei,Cheng Yang,Jiaying Mai,Yanfen Gong,Longsen Yan,Kai Zhao,Honglong Ning,Sujuan Wu,Jinwei Gao,Xingsen Gao,Guofu Zhou,Xubing Lu,J.-M. Liu
The interface between the dielectric and the active layer plays a critical role on the performance of solution-processed organic thin-film transistors (OTFTs). However, the creation of a high quality interface still represents a considerable challenge because it requires the balancing of surface energy with surface wettability. This study shows that UV-ozone treatment is very effective to obtain a high quality interface between a dielectric SiO2 film and a solution-processed 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C8-BTBT) semiconductor film. After only one minute UV-ozone exposure on the SiO2 surface, the hole mobility at room temperature reaches 6.50 cm2 (V s)−1 for a solution-processed C8-BTBT-OTFT. UV-ozone treatment can not only modify both surface energy and surface wettability but also clean the SiO2 surface. Consequently, it changes the degree of ordered growth, grain sizes, and grain boundaries in C8-BTBT films. Hence, UV-ozone treatment is a simple and efficient way to produce the desirable interface qualities that enable the highly ordered growth of C8-BTBT films. Using this method it is also very promising to produce a high-quality interface between the dielectric film and other solution-processed organic semiconductors to fabricate other high-performance OTFT applications.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Leonardo Togar Samosir,Ferry Anggoro Ardy Nugroho,Vivi Fauzia
Electrochemical water splitting, a key process for extracting hydrogen energy from water, is recognized as a promising eco-friendly technology. Molybdenum disulfide (MoS 2 ), especially when possessing abundant defects, emerges as a cost-effective and efficient catalyst for hydrogen evolution reaction (HER), presenting a viable alternative to noble metals such as platinum (Pt). However, the impact of UV-Ozone (UVO) in generating defects in bulk 2H-MoS 2 remains underexplored. Here, we successfully synthesized 2H-MoS 2 using the hydrothermal method on a 3D conductive carbon cloth. Subsequently, the sample underwent UVO treatment for three different durations of 10, 30, and 50 min. Our results demonstrate that a 50-minute exposure to UVO yields the most effective HER performance, with a significant decrease in the onset potential from 189 mV to 116 mV and a low Tafel slope of 64 mV/decade. This enhancement is attributed to increased surface activity, evident in a more than fourfold increase in double-layer capacitance ( C dl ). Importantly, the 50-minute UVO treatment not only significantly improves the purity of MoS 2 and increases the number of edge sites, but also lead to an increase in sulfur vacancies and the formation of amorphous oxygen-incorporated MoS x . These edge sites, along with sulfur vacancies and oxygens incorporation, are considered ideal for hydrogen binding, enhancing electron transport, and improving HER activity.
研究领域:
材料科学
·
能源技术
·
催化化学
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2019
·Vol. 29
·期 46
·1905694
·
IF 15.621
Lin Yang,Chunxiang Dall'Agnese,Yohan Dall'Agnese,Gang Chen,Yu Gao,Yoshitaka Sanehira,Ajay Kumar Jena,Xiao-Feng Wang,Yury Gogotsi,Tsutomu Miyasaka
MXenes are a large and rapidly expanding family of 2D materials that, owing to their unique optoelectronic properties and tunable surface termination, find a wide range of applications including energy storage and energy conversion. In this work, Ti 3 C 2 T x MXene nanosheets are applied as a novel type of electron transport layer (ETL) in low-temperature processed planar-structured perovskite solar cells (PSCs). Interestingly, simple UV-ozone treatment of the metallic Ti 3 C 2 T x that increases the surface Ti O bonds without any change in its bulk properties such as high electron mobility improves its suitability as an ETL. Improved electron transfer and suppressed recombination at the ETL/perovskite interface results in augmentation of the power conversion efficiency (PCE) from 5.00% in the case of Ti 3 C 2 T x without UV-ozone treatment to the champion PCE of 17.17%, achieved using the Ti 3 C 2 T x film after 30 min of UV-ozone treatment. As the first report on the use of pure MXene layer as an ETL in PSCs, this work shows the great potential of MXenes to be used in PSCs and displays their promise for applications in photovoltaic technology in general.
研究领域:
材料科学
·
能源技术
·
光伏技术
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产品关联
DOI
高影响因子
Solar RRL
·
2019
·Vol. 3
·期 6
·1900045
·
IF 0
Tun Wang,Dong Ding,Hao Zheng,Xin Wang,Jiayuan Wang,Hong Liu,Wenzhong Shen
Nickel oxide (NiO x ) has exhibited great potential as a hole transport layer (HTL) for fabricating efficient and stable perovskite solar cells (PSCs). However, it has been greatly limited by its fabrication and manipulation process. In this work, a simple processing method on an ultrathin electrochemical mesoporous NiO x film manipulated by controllable ultraviolet/ozone (UVO) treatmentis employed; the duration of UVO treatment on the NiO x film significantly affects the photovoltaic properties of the PSCs. When the exposure duration increases, the wettability, electrical conductivity, nonstoichiometry, and valence band energy of the NiO x film are improved with varying degrees. Besides, the perovskite grain size, recombination resistance at the perovskite/NiO x interface, and build-in potential of the device also increase, resulting in higher short-circuit current density ( J SC ) and open-circuit voltage ( V OC ). Combining these factors together, an optimal exposure time of UVO treatment on the NiO x film has been achieved at 5 min, which results in a significantly high performance with an efficiency of 19.67%, large V OC (>1.1 V), and J SC (>23 mA cm −2 ). Furthermore, the experimental results are coincide well with simulation results on the different corresponding subjects. Hopefully, this work could facilitate material manipulation toward scalable, high efficiency, and stable solar cells.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
Nature Communications
·
2015
·Vol. 6
·期 1
·1-7
·
IF 11.47
Ke Weijun,Fang Guojia,Wan Jiawei,Tao Hong,Liu Qin,Xiong Liangbin,Qin Pingli,Wang Jing,Lei Hongwei,Yang Guang,Qin Minchao,Zhao Xingzhong,Yan Yanfa
Efficient lead halide perovskite solar cells use hole-blocking layers to help collection of photogenerated electrons and to achieve high open-circuit voltages. Here, we report the realization of efficient perovskite solar cells grown directly on fluorine-doped tin oxide-coated substrates without using any hole-blocking layers. With ultraviolet–ozone treatment of the substrates, a planar Au/hole-transporting material/CH 3 NH 3 PbI 3- x Cl x /substrate cell processed by a solution method has achieved a power conversion efficiency of over 14% and an open-circuit voltage of 1.06 V measured under reverse voltage scan. The open-circuit voltage is as high as that of our best reference cell with a TiO 2 hole-blocking layer. Besides ultraviolet–ozone treatment, we find that involving Cl in the synthesis is another key for realizing high open-circuit voltage perovskite solar cells without hole-blocking layers. Our results suggest that TiO 2 may not be the ultimate interfacial material for achieving high-performance perovskite solar cells.
研究领域:
材料科学
·
能源研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）