Frontiers in Microbiology
·
2022
·
IF 6.064
Lu Ping,Ji Xuemeng,Xue Juan,Dong Yinping,Chen Xi
Screening drugs and compounds to fight against Cronobacter sakazakii (C. sakazakii), one of the most common pathogens that can cause fatal necrotizing enterocolitis, septicema and meningitis, is still needed. We found that p-coumaric acid (pCA) has an inhibitory effect on C. sakazakii in vitro and in vivo. Proteomic changes of C. sakazakii BAA-894 exposed to pCA were studied to reveal the antibacterial mechanisms involved. A total of 1,553 proteins were identified in C. sakazakii BAA-894 by label-free proteomics analysis. Fuzzy cluster analysis showed that 33 were up-regulated, and 110 were down-regulated with pCA treatment. Gene Ontology (GO) analysis concluded that pCA caused the change of metabolic state of bacteria and generally in the state of metabolic inhibition. KEGG Enrichment Analysis (KEGG) analysis showed that pCA inhibited energy metabolism and distorted the balance of amino acid metabolism. Posttranslational modification analysis showed that pCA affected the deamidation of three proteins, including Elongation factor Tu, one of the vital proteins in bacteria. Molecular docking suggested the hydrogen bond between the pCA carboxyl group and Elongation factor Tu Asn-64 might contribute to deamidation. Overall, we found that pCA interfered with cellular energy and amino acid metabolism and promoted elongation factor Tu deamidation, suggesting that pCA can be an effective natural substitute to control C. sakazakii.
研究领域:
微生物学
·
蛋白质组学
·
医学
✓ 已验证
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2019
·
IF 5.108
Yusi Tian,Minghua Zhou,Yuwei Pan,Jingju Cai,Gengbo Ren
Pre-magnetized Fe 0 (Pre-Fe 0 ) was for the first time applied as heterogeneous catalyst to enhance the oxidation efficiency of electro-Fenton (EF) for the degradation of p -nitrophenol (PNP). The parameters including current, initial pH and pre-Fe 0 dosage of Pre-Fe 0 /EF process were optimized and compared with other two processes (conventional Fe 0 /EF and electro-oxidation) to confirm its advantage. The rate constants of PNP removal were 1.40–3.82 folds of those by Fe 0 /EF process under various experimental conditions. The application of pre-Fe 0 as catalyst could extend the working pH range from 3.0 to neutral conditions for PNP removal and reduce the Fe 0 dosage from 2 to 0.5 mM corresponding to Fe 0 /EF, avoiding the second pollution of iron sludge . The superiority of Pre-Fe 0 /EF process was also verified to improve the degradation and mineralization of other phenols and antibiotics. Furthermore, a possible pathway of PNP degradation was revealed by the identification of intermediates and organic acids, and the possible mechanism of pre-Fe 0 efficiently enhanced the EF efficiency was proposed. This work demonstrated that such a novel heterogeneous EF process using pre-Fe 0 catalyst was clean and promising for the degradation of refractory organic pollutants .
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xiang Zhou,Xiaohao Liu,Fenglei Qi,Haixia Shi,Ying Zhang,Peiyong Ma
P-doped mesoporous carbon material is receiving increasing attention in various fields due to its special physicochemical properties, but the research in the field of pollutant removal is rarely reported. Herein, P-doped furfural residue-based carbon materials (PFRC) with ultra-high mesoporous ratio (93.9%), narrow pore size distribution and large surface area (1769.4 m 2 g −1 ) was prepared by a simple method of fast pyrolysis of phosphoric acid treated furfural residue (FR). A series of characterizations were carried out to explore the physicochemical properties and P-doping mechanism of the materials systematically. With the increase of the activation temperature, the evolution of the P-doped structure is as follows: adsorbed phosphate → P-O-C aromatic → O3P-C aromatic → O2P-C2 aromatic → OP-C3 aromatic . The PFRC500 prepared at 500 °C has the most abundant P-O-C aromatic and P-C aromatic structures, which lead to a higher specific surface area, more developed pore structure and more graphite edge defects than other PFRCs. Methylene blue (MB) adsorption studies showed that PFRC500 had a good adsorption performance with 486 mg g −1 equilibrium adsorption capacity and 97.2% of removal rate (T = 298 K, C 0 = 100 mg L −1 ). The adsorption kinetics and thermodynamics were studied. The role of P structure in MB adsorption was explored for the first time. the adsorption mechanism was explored. The P-O-C aromatic , O3P-C aromatic and O2P-C2 aromatic structures are the main chemical adsorption sites, but C3 aromatic -PO is not. This work can provide guidance for the design of P-doped mesoporous carbon materials with better adsorption performance in the future.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2021
·
IF 8.067
Zeming Gu,Qi Wang,Xiaoqin Sun,Lingwei Lu,Yuwei Zhang,Ran Wang,Shu Jin,Yinlin Shao,Jun Qian,Xiaoxiang Xu
P-type semiconductivity has been observed in solid solution series (SrTiO 3 ) 1- x (CaCr 0.5 Nb 0.5 O 3 ) x (0.0 ≤ x ≤ 0.15), which all adopt cubic symmetry and own intense absorption in the visible light region. These solid solutions are superior H 2 evolution photocatalysts under visible light illumination (λ ≥ 400 nm). An AQE as high as 1.02 % at 420 ± 20 nm has been achieved at optimal composition (SrTiO 3 ) 0.85 (CaCr 0.5 Nb 0.5 O 3 ) 0.15 which significantly surpasses the parent compounds. Stoichiometric H 2 /O 2 production under visible light illumination has been successfully realized using Z-scheme system containing (SrTiO 3 ) 0.85 (CaCr 0.5 Nb 0.5 O 3 ) 0.15 , WO 3 and I − /IO 3 − redox couple.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
CELLULOSE
·
2021
·Vol. 28
·期 3
·1781-1793
·
IF 5.044
Chen Yu,Wan Caiyan,Liu Shidong,Wang Peng,Zhang Guangxian
Abstract A novel flame retardant with high P content and multi-reactive ammonium phosphorus acid groups Bis(2-hydroxyethyl) imino tris-(hydroxymethyl)-methane methylphosphonic acid (ABTMPA) was synthesized for treatment of cotton fabrics. The ABTMPA treated cotton fabrics were characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction and fourier transform infrared spectroscopy (FTIR). The structure of the ABTMPA was analyzed by the nuclear magnetic resonance. The limiting oxygen index (LOI) was used to evaluate the flame retardancy and durability of the treated cotton fabrics. The LOI value of cotton fabric treated with 31% ABTMPA was 50.2%, and an LOI of 41.2% was retained after 50 laundering cycles. Micro-burning calorimetry showed that total heat of combustion of the treated cotton fabric was reduced, and the char residual was much higher than that of pure cotton. Thermogravimetric (TG) and TG-FTIR analyses indicated that the flame retardant ABTMPA changed the thermal decomposition pathway of cellulose, and the combustible gases generated at high temperature was much lower than that of pure cotton. Flame retardant treated cotton fabric had excellent flame retardancy and durability. In addition, whiteness and breaking strength are well maintained. Therefore the ABTMPA shows the potential of flame retardants in future commercial applications. Graphic abstract
研究领域:
材料科学
·
纺织工程
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2017
·Vol. 46
·期 13
·4296-4302
·
IF 4.029
Tao Ji,Ze Cui,Wenlong Zhang,Yunjiu Cao,Yongfang Zhang,Shu-ang He,Mingdong Xu,Yangang Sun,Rujia Zou,Junqing Hu
Herein, we report a photocatalytic heterojunction device of rutile TiO2 nanorod arrays based on a p–n silicon junction (TiO2@PN) and its full absorption of ultraviolet and visible light for synergistic photodegradation. The fabricated TiO2@PN had excellent photocatalytic degradation of methyl orange (MO) under irradiation of a 300 W Xe lamp, and its pseudo-first-order rate constant k was 0.221 h−1, which was greatly higher than that for TiO2 nanorod arrays based on an n–p silicon junction (TiO2@NP, 0.078 h−1) and glass (TiO2@G, 0.032 h−1). The higher photocatalytic performance of TiO2@PN could be attributed to the fact that the photovoltage (PV) of the p–n junction promotes separation of the electron–hole pairs of the TiO2, and the holes are thus left within the TiO2 nanorods to produce a strong oxidant of hydroxyl radicals (˙OH). Moreover, this heterojunction device could be easily fabricated in a large size for easy recovery and recycling, which shows its promise in the solar-driven degradation of environmental pollution.
研究领域:
材料科学
·
环境科学
·
光催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
·
2020
·
IF 4.947
Xiu Li,Yimin Xuan,Qiang Li
Conventional microchannels provide effective chip cooling with constant flow rate and this comes at the cost of high pumping power consumption. Considering the dynamic heat load in reality, a self-adaptive microchannel cooling is desired for regulating the flow rate to diminish the operational cost while preserving the inherent cooling effectiveness. Taking the advantages of easy synthesis, well tunable lower critical solution temperature (LCST) and remarkable mechanical strength, this paper reports the self-adaptive microchannel cooling with the thermal-sensitive nanocomposite (NC) P(MEO 2 MA- co -OEGMA) hydrogel. A novel route is developed to integrate the hydrogel with the chip using template-aided imprint molding and in situ polymerization. Circular hydrogel is elaborately designed and anchored firmly in the channel. The cooling performance is tested with a custom test vehicle under different operating conditions. The hydrogel acts as a smart valve and tailors the flow rate from 0.14 mL/s to 0.46 mL/s based on heat load variation. Compared with conventional channels, heat flux of 100 W/cm 2 can be extracted with similar temperature rise while the coefficient of performance (COP) is improved by an order of magnitude. The transient characteristics and repeatability are also validated. The self-adaptive scheme offers both effective and economical liquid cooling for modern electronic devices.
研究领域:
材料科学
·
电子工程
·
热管理技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Zheyang Liu,Jianli Liang,Qianqian Song,Yang Li,Zhiquan Zhang,Min Zhou,Wei Wei,Hui Xu,Chun-Sing Lee,Huaming Li,Zhifeng Jiang
Efficient conversion of CO 2 to high value-added chemical products is a promising strategy for achieving carbon neutrality . Although the photocatalyst technique has been made widespread researched, highly efficient photoreduction CO 2 with metal-free photocatalysts remains a challenge. Herein, we report a zero-dimensional black phosphorus quantum dots (BPQDs)-decorated one-dimensional carbon nitride nanotubes (CNNT) photocatalyst that reduces CO 2 to CO with a rate of 44.6 μmol g –1 h –1 , which is better than the similar photocatalysts and pristine carbon nitride nanotubes . Synchrotron radiation XAFS measurements substantiate the construction of N-P electron transfer channels within BPQDs and CNNT. Time-resolved PL spectrum demonstrates the faster separated electron hole pairs . In situ irradiated X-ray photoelectron spectroscopy confirms the photogenerated-electron flow trend and the active site of photocatalytic reaction. Moreover, the main intermediate *COOH is verified by in situ FT-IR characterization which is corresponding to the previous research. The construction of atomic-level N-P charge transfer channel efficiently facilitates the charge transfer and accelerates the catalytic rate. This work provides a novel insight into the design of BPQDs-anchoring heterostructures for photocatalytic CO 2 reduction.
研究领域:
光催化化学
·
纳米材料科学
·
环境能源技术
✓ 已验证
DOI
高影响因子
Science China-Chemistry
·
2019
·Vol. 63
·期 1
·28-34
·
IF 6.085
Zhao Bohang,Huang Yi,Liu Dali,Yu Yifu,Zhang Bin
The development of a facile strategy to construct stable hierarchal porous heterogeneous photocatalysts remains a great challenge for efficient CO 2 reduction. Additionally, hole-trapping sacrificial agents (e.g., triethanolamine, triethylamine, and methanol) are mostly necessary, which produce useless chemicals, and thus cause costs/environmental concerns. Therefore, utilizing oxidation ability of holes to develop an alternative photooxidation reaction to produce value-added chemicals, especially coupled with CO 2 photoreduction, is highly desirable. Here, an in situ partial phosphating method of In 2 O 3 is reported for synthesizing InP–In 2 O 3 p-n junction. A highly selective photooxidation of tetrahydroisoquinoline (THIQ) into value-added dihydroisoquinoline (DHIQ) is to replace the hole driven oxidation of typical sacrificial agents. Meanwhile, the photoelectrons of InP–In 2 O 3 p-n junction can induce the efficient photoreduction of CO 2 to CO with high selectivity and stability. The evolution rates of DHIQ and CO are 2 and 3.8 times higher than those of the corresponding In 2 O 3 n-type precursor, respectively. In situ irradiated X-ray photoelectron spectroscopy and electron spin resonance are utilized to confirm that the direct Z-scheme mechanism of InP–In 2 O 3 p-n junction accelerate the efficient separation of photocarriers.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2021
·
IF 7.991
Youyou Huang,Jianan Zhang,Yue Zhang,Ling Shi,Xiru Qin,Bing Lu,Yue Ding,Yang Wang,Tingting Chen,Yong Yao
Multi-drug resistance (MDR) in tumor therapy often leads to relatively low efficiency of the current chemotherapeutics, attributing to the overexpression of P-glycoprotein (P-gp) increases the efflux of anticancer drugs out of the cells. To address this obstacle, herein, a photothermal-triggered nitric oxide (NO) gas releasing nanosystem was designed for reversing drug resistance in MDR cells based on mesoporous core–shell structured nanocomposites (MCSN) of Cu 2-x [email protected] 2 . The mesoporous shell provided the modification and encapsulation capacity for the NO donor— S -nitrosothiol (SNO) and doxorubicin (DOX) loading. Besides, the heat generated from the photothermal conversion of Cu 2-x Se could trigger NO gas generation and enhance DOX release in the acid microenvironment of cancer cells. The released NO gas in the cytoplasm could induce mitochondrial dysfunction to block adenosine triphosphate (ATP) synthesis and ATP-dependent drug efflux, thereby overcoming MDR. Therefore, this novel gas/chemo/photothermal triple-combination therapeutic nanoplatform is expected to be a potentially effective strategy against MDR and may reveal new insights for other NO gas-relevant medical applications.
研究领域:
肿瘤学
·
药理学
·
纳米医学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Ruihan Du,Kunkun Xiao,Shuiyuan He,Yang Wang,Chunli Kang
In this study, Bi 4 Ti 3 O 12 nanosheets and flower-like MoS 2 were synthesized by hydrothermal method and compounded into p-n heterojunctions with 2 D– 2 D structure. The stable p-n heterojunctions exhibit excellent visible-light-driven catalytic activity through effective electron/hole (e - /h + ) separation, which generates a built-in electric field between the two components, accelerates the separation efficiency of photogenerated charges between the materials, and reduces the photogenerated electron-hole complexation efficiency. The methylene blue (MB) was degraded under simulated sunlight conditions, and the removal efficiency of MB at an initial concentration of 10 mg/L could reach 91.1% within 270 min. HRTEM and microstructural study revealed microscopic close interaction between the two phases, which can shorten the transport path of photogenerated electron-hole pairs, and optical measurement studies show a significant improvement in visible light absorption and charge carrier separation due to the formation of heterojunctions. Free radical quenching experiments and electron paramagnetic resonance (EPR) showed that the main active substances are·OH and·O 2 - , and photogenerated h + is also involved in the photocatalytic reaction process. The system also shows good degradation efficiency in different water matrices, five-cycle experiments, and good structural stability elucidate its potential application in degrading emerging pollutants for water purification.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Feng Zhou,Jiadong Chen,Yun Yang,Xiaofeng Ke,Xue Liu,Lijie Zhang,Jun Li,Huile Jin,Shun Wang,Ying Li,Chenliang Su
Development of Ru-based electrocatalysts for acidic oxygen evolution reaction without a trade-off between activity and durability remains challenging. Herein, we constructed Co 3 O 4 /RuO 2 heterojunctions anchored on carbon (Co 3 O 4 /RuO 2 -C) with a low Ru loading (2.74 wt%), in which strong coupled p-n junctions facilitated electron transfer from RuO 2 to Co 3 O 4 . The Co 3 O 4 /RuO 2 -C demonstrated a low overpotential of 170 mV at 10 mA cm −2 and long-term stability in 0.1 M HClO 4 due to its unique structure. The origin of its high performance in acidic OER was revealed by the combination of in-situ attenuated total reflection infrared and Raman tests. Concretely, oxygen generation for Co 3 O 4 /RuO 2 -C was dominated by the adsorbate evolution mechanism, and the introduction of Co 3 O 4 facilitated the redox of RuO 2 , generating active sites for OER. Theoretical calculations further substantiated that the Co 3 O 4 /RuO 2 heterojunctions possessed lower energy barriers for OER. This work provides a compelling synthesis route for effective and stable electrocatalysts for acidic OER.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 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）