APPLIED SURFACE SCIENCE
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2018
·
IF 4.439
Quan Zou,Hu Li,Yuping Yang,Yingchun Miao,Yuning Huo
A novel photocatalytic reactor was designed for the photo-degradation of organic pollutants with floated glass balls on the solution surface, which were constantly rotated by the air pumping and coated with Bi 2 O 3 /TiO 2 film. The uniform and stable Bi 2 O 3 /TiO 2 film was prepared by the facile sol-gel method at the optimal conditions of Bi Bi 2 O 3 content (1.0 mol%) and the three coating times with the film thickness of 210 nm. It was uniformly distributed and stably combined with the surface of the glass ball. Modification of Bi 2 O 3 significantly improved the visible light absorption of TiO 2 film and inhibited the photo-induced charges, promoting the photo-degradation activity. More importantly, the air pumping at the bottom of the reactor impelled the constant rotation of floated glass balls. It could realize the uniform aqueous membrane on the catalyst film to improve the efficient contact between catalyst and organics and to utilize the irradiation light efficiently, inhibiting the light shield effect of dyeing wastewater and facilitating the photo-degradation. Moreover, the Bi 2 O 3 /TiO 2 photocatalytic film in this photocatalytic reactor exhibited high durability and prevented the leakage of catalyst, providing a potential for the practical applications in the future.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2023
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IF 13.6
Zitong Yang,Yunkai Sun,Zexi Hou,Haiyan Yu,Mingxue Li,Yanwei Li,Yude Li,Baoyu Gao,Shiping Xu
Although the effect of Cu 2+ on antibiotic removal during photocatalytic reaction has been studied in depth, there is less known about the effect of antibiotics on Cu 2+ removal. In this study, we report for the first time that, during the photocatalytic purification of sulfamerazine (SMZ) and Cu 2+ combined pollution, Cu 2+ concentration showed an obvious five-stage fluctuation, which was completely different from the simple promotion or inhibition reported in previous studies. By employing HPLC-MS analysis and density functional theory (DFT) calculation, the repeated fluctuation of Cu 2+ concentration was found to be closely related to the SMZ degradation process, mainly resulting from solution pH drop and formation of Cu-containing intermediates which acted as sacrificial agents for Cu 2+ reduction. In addition, compared with the SMZ-free system, the presence of SMZ can greatly enhance the deep removal of Cu 2+ (minimum Cu 2+ concentration was only 0.17 mg/L vs. 1.28 mg/L without SMZ), and there was a wide time interval to ensure the efficient recovery of Cu metal. More interestingly, the in-situ obtained Cu-decorated TiO 2 photocatalyst performed well in water splitting, nitrogen fixation and bacterial sterilization. Results of this study confirmed the great potential of photocatalytic technology in purifying antibiotic-heavy metal combined pollution.
研究领域:
环境科学
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化学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
Nature Energy
·
2022
·Vol. 7
·期 11
·1042-1051
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IF 67.439
Zhang Lili,Liu Le,Pan Ziye,Zhang Rui,Gao Zhuoyang,Wang Guangming,Huang Keke,Mu Xiaoyue,Bai Fuquan,Wang Yan,Zhang Wei,Cui Zhonghua,Li Lu
Direct non-oxidative dehydrogenation of alkanes produces useful carbon feedstocks and hydrogen fuel. However, breaking the C–H bonds in alkanes typically requires high temperature, stoichiometric oxidants or high-energy ultraviolet light; processes that operate under milder conditions are attractive but tend to have poor efficiency. Here we report Pt/black TiO 2 photocatalysts in which Pt species are close to each other but not directly bonded, exhibiting high performance for alkane dehydrogenation in visible to near-infrared light at room temperature. For cyclohexane dehydrogenation, the turnover number for H 2 production exceeded 100,000 without any deactivation over 80 reaction cycles, far beyond thermal reactions. For methane, 8.2% conversion was achieved with 65% selectivity to propane, rather than the more common ethane. We propose that methane undergoes intramolecular dehydrogenation to produce a methylene intermediate. For C2+ alkanes, fast dehydrogenation (up to 1,440 µmol g −1 h −1 ) to the corresponding olefins was realized. Distinct from isolated Pt + monomers, the collections of Pt + monomers give better photocatalytic activity and selectivity.
研究领域:
化学
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催化
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材料科学
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能源
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DOI
高影响因子
ACS Applied Polymer Materials
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2023
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IF 5
Jia Deng,Xiaojing Yuan,Lian Wang,Yanqi Sun,Hao He,Zhenyi Wu,Zibin Gao,Jingou Ji,Bochu Wang,Shilei Hao
Autogenous keratin is a promising material for personalized wound healing applications. However, the common keratin extraction methods are time-consuming, and the variations in performance between different individual keratins are not clear. Herein, we developed TiO2 photocatalytic-assisted H2O2 oxidation strategy (H2O2/TiO2/UV), an advanced oxidation method, to rapidly extract human hair keratins within 2 h. The H2O2/TiO2/UV method for keratin extraction showed a higher protein yield compared to the H2O2 method. Keratins obtained from the developed method exhibited typical chemical and secondary structures. Furthermore, individual keratins from four young girls were extracted by using the H2O2/TiO2/UV method, and individual keratin/PCL films were successfully fabricated within 5 h. More importantly, individual keratin films displayed superior hemostatic performance and wound healing in vivo compared to that of keratin extracted via the H2O2 method. Interestingly, the four individual keratin films exhibited similar hemostatic efficiency but distinct wound-healing properties in terms of epidermal thickness and density of skin appendages. These data indicated that the developed H2O2/TiO2/UV method is an efficient and feasible approach to extract human hair keratins, which provides an intriguing possibility to explore personalized materials for promoting wound healing.
研究领域:
材料科学
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生物医学工程
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化学工程
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组织工程
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DOI
高影响因子
ACS Catalysis
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2025
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IF 13.1
Weina Yang,Yachao Wang,Yaxiong Wei,Guofeng Zhao,Weixin Huang,Cong Fu
Photocatalytic oxidative coupling of methane (OCM) offers a sustainable pathway for direct conversion of methane into value-added hydrocarbons, yet faces persistent challenges in balancing efficient methane activation with suppression of overoxidation. Here, we present a TiO2-based photocatalyst decorated with highly dispersed Ag–Co dual sites that achieves superior performance in continuous-flow OCM. The optimized AgCo–TiO2 system demonstrates a remarkable C2 hydrocarbon production rate of 1.7 mmol g–1 h–1 with 91% selectivity while maintaining stable operation for over 30 h. In situ spectroscopic analyses indicate that the introduced Co species induce mobile-charge imbalances, driving the directional transfer of photogenerated electrons and effectively suppressing electron–hole recombination. Coupled with Ag serving as a catalytic center, these effects synergistically enhance O2 activation, C–H bond cleavage, and selective C–C coupling, thereby contributing to the superior catalytic performance. This work provides valuable mechanistic insights into the photocatalytic OCM process, highlighting the pivotal role of precisely engineered charge transfer pathways in enabling efficient methane-to-C2 conversion.
研究领域:
光催化
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材料科学
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化学工程
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环境化学
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能量转换
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产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2018
·Vol. 6
·期 45
·7503-7510
·
IF 4.776
Huan Liu,Luping Feng,Yuanyuan Cai,Yue Hua,Min Liu,Mengyuan Yin,Shuai Li,Xiaoxia Lv,Jiangwei Wen,Hua Wang
An ultrasensitive and high-throughput visualized colorimetric method has been initially developed with a wettable microwells array for probing guanine base-containing anthrax DNAs in blood based on silver deposition amplified by the synergic TiO2 photocatalysis and guanine photoreduction under visible light. Hydrophilic microwells were first created on the hydrophobic slides to yield the wettable microwells array, on which photocatalytic titanium dioxide (TiO2) nanoparticles were deposited with dopamine (DA) to yield TiO2@DA for anchoring single strand DNA (ssDNA) capture probes without guanine bases. After the hybridization of the targeted anthrax DNAs, exonuclease I (Exo I) was introduced into the microwells to selectively digest the unhybridized ssDNA probes. The silver deposition was further conducted by the synergic photocatalysis of TiO2@DA and photoreduction of guanine bases of anthrax DNAs, thus achieving the amplified silver signals for the visualized colorimetric assays. Moreover, benefitting from the wettability feature of the hydrophilic–hydrophobic interfaces of the microwells array so fabricated, DNA analytes could be accumulated from the sample droplets through the condensing enrichment process to realize the ultrasensitive detection, in addition to circumventing any crossover contaminants between the sample droplets. The developed visualized colorimetric method with the microwells array was subsequently applied for probing anthrax DNAs in blood with levels down to 1.0 fM. DNAs with single-base and double-base mutations could also be identified accurately. Importantly, such a biosensing design route of a wettable microwells array, in combination with the photocatalytic silver deposition and specific Exo I-catalytic probe digestion, may promise extensive applications for the high-throughput, ultrasensitive, and selective detection of guanine-containing DNA targets with ultra-trace levels in complicated samples like blood.
研究领域:
生物化学
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分析化学
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纳米技术
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分子生物学
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产品关联
DOI
PubMed
高影响因子
Nano Energy
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2022
·
IF 19.069
Liping Ren,Fanpeng Kong,Xufeng Wang,Yajie Song,Xudong Li,Fang Zhang,Nan Sun,Hanwen An,Zaixing Jiang,Jiajun Wang
The limited stability and the excessive dependence on external heating sources restrict the development of polymer-based solid-state Li-O 2 batteries . Herein, we propose a multifunctional composed cathode with the photo-electro-thermal synergy to achieve a PEO-based solid-state Li-O 2 (PSS Li-O 2 ) battery operating at room temperature. The multifunctional composed cathode consists of the traditional black TiO 2 photocatalyst and carbon cloth (b-TiO 2 /CC). The b-TiO 2 /CC harvests a full spectrum of sunlight, besides the photo-generated electrons and holes enhancing reaction kinetics during discharging and charging processes, though converting solar energy into heat to achieve self-heated replace on external. The photo-electro-thermal synergy-triggered PSS Li-O 2 battery establishes a low overpotential of 0.26 V and long durability of up to 90 cycles, which is a breakthrough for PEO-based Li-O 2 batteries operating at room temperature. A flexible PSS Li-O 2 battery is constructed and exhibits superior flexibility and mechanical stability . The mechanism of the photo-electro-thermal synergy provides a new strategy for PSS Li-O 2 batteries and advances the high-efficiency utilization of solar energy in portable devices.
研究领域:
材料科学
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电化学
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能量存储
·
太阳能利用
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2021
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IF 8.198
Jilin Yuan,Ming Chen,Wenhao Xiang,Chuanbao Xiao,Nianbing Zhong,Qiang Liao
Rapid and continuous degradation of toxic organic pollutants and conversion to microalgae biomass are attracting enormous interest for resource recovery and wastewater treatment. Aiming toward this goal, we develop and demonstrate a novel photocatalytic-biological system in which photocatalytic optical hollow fibers coated with the N-doped TiO2 photocatalyst and a Scenedesmus obliquus biofilm cooperatively convert phenol to microalgae biomass. The photocatalytic optical hollow fibers exhibit high UV–visible photocatalytic activity to rapidly degrade phenol and emit visible light for biofilm growth, lipid synthesis, and O2 production. O2 produced as an electron acceptor is transferred to the surface of the photocatalytic optical hollow fibers, limiting electron–hole recombination and generating reactive oxygen species such as •OH and •O2–. Upregulation of nicotinamide adenine dinucleotide + hydrogen and adenosine triphosphate and enrichment of Rhodococcus and Pseudomonas in the biofilm enhance the resistance to phenol toxicity, maintain rapid and stable biofilm growth, and increase lipid content. This photocatalytic-biological system rapidly and sustainably converts phenol to microalgae biomass.
研究领域:
环境科学
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生物技术
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废水处理
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资源回收
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光催化
·
微生物学
✓ 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）