NEW JOURNAL OF CHEMISTRY
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2019
·Vol. 44
·期 2
·537-542
·
IF 3.069
Zhenyu Li,Fa Cao,Lei Wang,Zhiwu Chen,Xiaohong Ji
In this article, novel ternary MoS2/MoO3/TiO2 composite catalysts were developed. The photocatalytic performance of the ternary MoS2/MoO3/TiO2 composites was evaluated by photo-degradation of rhodamine B (RhB). It was found that the photocatalytic ability of the composites was strongly dependent on the mass ratio of MoS2–MoO3 to MoS2–MoO3–TiO2. The ternary composite catalyst with optimum composition showed a fast degradation rate (maximum ∼0.138 min−1), which could degrade over 95% of RhB solution (10 mg L−1) within 20 min under visible light (λ > 420 nm) irradiation. The possible photocatalytic mechanism was proposed based on the trapping photocatalytic experiment and band alignment of the composite. The synergistic effect of the strong absorption of the catalyst and the efficient separation of photogenerated electron–hole pairs by the novel ternary composite contributed to the enhanced photocatalytic activity.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2015
·
IF 3.512
Haochi Liu,Xiaohui Ren,Ligang Chen
Adsorptive removal of Rhodamine B (RhB) on a novel kind of magnetic metal–organic framework (MOF) was studied in view of adsorption isotherm, thermodynamics and kinetics. The adsorbent was characterized by physical property measurement system, X-ray diffraction and scanning electron microscopy. The adsorption isotherm of RhB on magnetic MOF followed the Freundlich model. The resultant kinetics data was well described by the pseudo-second-order model. Most of the RhB was removed from the aqueous solution within 30 min. Thermodynamic parameters including Gibbs free energy, enthalpy, and entropy of adsorption were obtained. The result confirmed that the adsorption is controlled by an entropy effect rather than an enthalpy change. The maximum removal has been achieved in the pH range of 4–8 at 150 rpm. The sorbent can be used at least five times after washing with methanol including HCl (0.001 mol L −1 ). The π−π stacking interaction and electrostatic interaction may play an important role in the adsorption of RhB onto magnetic MOF. Compared with other adsorbents, this kind of magnetic material demonstrated a superior dye adsorption capability.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
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2025
·
IF 3.1
Zhang Han,Li Ping-feng,Shu Chi-Min,Wu Hong-bo
To improve the storage stability and delay accuracy of boron series delayed composition, in this study, the reaction thermokinetic characteristics and microscopic reaction mechanism of B-Pb 3 O 4 delay composition were systematically analysed. Synchronous thermal analysis and differential scanning calorimetry were used to evaluate the thermodynamic properties of the delay composition. The kinetic parameters were calculated based upon Ozawa method. The macroscopic and microscopic reaction characteristics of Pb 3 O 4 -B were studied via X-ray photoelectron spectroscopy and density functional theory calculation. The reaction path and reaction site were determined by analysing the HOMO–LUMO orbit of reactants. The results showed that there are two reaction sites in the reaction process of lead tetraoxide and boron, which are Pb6 (Pb5) and Pb7 (Pb4) sites, respectively. The poor storage stability was mainly due to the reaction energy barrier of Pb 3 O 4 cluster and B being low, which are prone to chemical reactions in storage. The microscopic reaction mechanism of lead trioxide and boron mainly consists of five steps: Pb 3 O 4 + B → BO + 3PbO, (2) BO + Pb 3 O 4 → BO 2 + 3PbO, (3) B + PbO → BO + Pb, (4) BO + BO → B 2 O 2 , and (5) BO + BO 2 → B 2 O 3 , respectively.
研究领域:
材料科学
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化学
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DOI
高影响因子
Journal of Environmental Sciences
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2025
·
IF 6.3
Caihong Wang,Jiaxin Zhang,Tong Li,Jingwei Wang,Dan Xu,Qiao Ma
Benzalkonium chloride (BAC) is widely employed as a broad-spectrum biocide and has emerged as a significant environmental pollutant. Polymyxin B (PB) serves as the last-line defense for the treatment of Gram-negative pathogens. Previous studies reported that BAC-adapted Pseudomonas aeruginosa increased the tolerance to PB. Herein, we present the novel finding that the combination of BAC and PB exhibited synergistic antibacterial effects against P. aeruginosa . Time-killing assay demonstrated a significant reduction in bacterial cell viability. Scanning electron microscopy, zeta potential analysis, hydrophobicity measurements, and fluorescence probe analyses collectively revealed severe disruption of the cell envelope and membrane potential induced by the combination of BAC and PB. Transcriptomic analysis revealed that the BAC-PB combination notably downregulated the expression of genes involved in lipid A modification and cell envelope production, including phoPQ, pmrAB, bamABCDE, lptABCDEG, lolB, yidC , and murJ . Additionally, the combination group exhibited augmented production of reactive oxygen species and diminished ATP synthesis. The expression of the genes associated with substance metabolism and energy generation was significantly impeded. This study provides significant implications for the interactions of biocides and antibiotics on Gram-negative pathogens, while also addressing antibiotic resistance and developing the external treatment strategy for Pseudomonas -infected wounds and burns.
研究领域:
微生物学
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药理学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Advanced Sensor and Energy Materials
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2023
·
IF 0
Zesen Lin,Changchang Dong,Wei Mu,Xiaojun Han
Although photocatalytic technology is applied in water treatment, the challenge still exists due to its low photocatalytic performance. Herein, a photocatalytic reactor coupled with nanobubbles (NBs) is developed to degrade organic pollutants in wastewater. The reactor contains Ti mesh coated with TiO 2 nanotube arrays as a photocatalyst. The introduction of NBs in the reactor increases the dissolved oxygen content to enhance photocatalytic performance. The photocatalytic reactor exhibits outstanding photocatalytic performance, and the degradation ability of Rhodamine B is 95.39% after 2 h of irradiation treatment. The reactor also shows excellent photodegradation performance for other organic pollutants, such as methylene blue (74.23%), tetracycline (68.68%), and oxytetracycline hydrochloride (64.10%). Radical trapping experiments further prove that ·O 2 − , h + and ·OH are the active species for the degradation of RhB in the photocatalytic system. Therefore, this work provides a feasible strategy to design a photocatalytic reactor coupling with nanobubbles technology for the photodegradation of organic pollutants in wastewater.
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
DESALINATION
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2025
·
IF 9.8
Fei Yu,Haoyuan Yin,Jie Li,Tianjie Chen,Liping Sun,Jie Ma
Developing bismuth-carbon composites that can alleviate the stress concentration and volume expansion problems during the Bi/BiOCl conversion reaction is crucial for electrochemical desalination, especially Cl − removal technology, but it is still a great challenge. Here, we report a B/N co-doped bismuth encapsulated in carbon tubes. Using CAU-17 as a template, a carbon tubular material with multiple carbon layer structures was successfully synthesized by co-pyrolysis with BCN nanosheets, which achieved effective encapsulation of Bi. As the pyrolysis temperature increased, the continuous evaporation of Bi prompted the transformation of the carbon tube structure from a soft carbon to a hard carbon structure interconnected by multi-layered short graphene flakes. This alleviated the instability of the electrode caused by the volume expansion during the Bi/BiOCl transformation reaction and also provided additional ion storage capacity. When applied to the CDI dechlorination anode, Bi@BCN-900 exhibited a high desalination capacity of 145.96 mg g −1 and low energy consumption of 0.53 kWh kg −1 NaCl at an applied voltage of 1.2 V. Moreover, Bi@BCN-900 showed good stability over long-term cycling tests. This work expands the application of CAU-17 and offers new research insights for the design of bismuth-based materials for CDI dechlorination anodes.
研究领域:
材料科学
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环境工程
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电化学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2015
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IF 3.091
Meichao Gao,Dafeng Zhang,Xipeng Pu,Hong Li,Dongdong Lv,Bingbing Zhang,Xin Shao
Bi/BiOBr photocatalysts with improved photodegradation performances were synthesized by a facile one-step hydrothermal method using ethanol–water mixed solution. The samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, electron paramagnetic resonance spectroscopy, UV–vis diffuse reflectance spectroscopy and photoluminescence spectroscopy. The addition of ethanol results in the partial reduction of Bi 3+ ions to metallic Bi, different morphology from pure BiOBr , and the formation of oxygen vacancies. The dosage of ethanol plays a vital role in the morphologies and photodegradation performances of as-obtained Bi/BiOBr. The Bi/BiOBr photocatalysts show improved photodegradation performances, which is attributed to the high surface area, narrow band gap, and inhibited recombination of electron–hole pairs .
研究领域:
材料科学
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环境科学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 27
·13010-13020
·
IF 3.925
Jianke Tang,Yanfeng Xue,Chunlei Ma,Shengjian Zhang,Qiaoling Li
The construction of p–n heterojunctions instead of p-type or n-type semiconductors can improve the separation efficiency of photoinduced electrons and holes. In this work, BiOI/tetrapod-like ZnO whisker (T-ZnOw) p–n heterojunction photocatalysts with different Bi/Zn molar ratios were prepared by the in situ precipitation of BiOI on a T-ZnOw substrate. The BiOI/T-ZnOw photocatalysts efficiently degraded rhodamine B (RhB) and oxytetracycline (OTC) under visible light irradiation. The photocatalyst with a Bi/Zn molar ratio of 1 : 10 (BZ-10) exhibited the highest photocatalytic activity, with 97.1% and 88.0% removal of RhB and OTC, respectively. After degradation cycling experiments, the OTC removal efficiency was still 80.7%. The photocatalytic activity of the BZ-10 composite was improved compared to those of pure T-ZnOw and BiOI. This was attributed to the large specific surface area and the efficient separation of charge carriers caused by the formation of p–n heterojunctions between BiOI and T-ZnOw. The photodegradation mechanism was put forward based on radical trapping experiments and electron spin resonance (ESR) results. The synthesized BiOI/T-ZnOw heterojunction composite could be a promising photocatalyst in environmental photocatalysis.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
DYES AND PIGMENTS
·
2013
·
IF 3.532
Zhengping Dong,Xin Tian,Yuanzhe Chen,Jingran Hou,Yueping Guo,Jian Sun,Jiantai Ma
A novel and simple fluorescent chemosensor based on rhodamine (R-2) is designed and synthesized to detect Hg 2+ . Probe R-2 exhibits high selectivity and sensitivity for sensing Hg 2+ with a detection limit at 10 −8 M level, and displays a significant color change from colorless to pink color in the presence of Hg 2+ . About a 400-fold increase in fluorescence emission intensity is observed upon binding excess Hg 2+ in 50% H 2 O/CH 3 CN HEPES buffer at pH 7.00. The titration results show a 1:1 complex formation between R-2 and Hg 2+ . The reversibility of chemosensor R-2 is verified through its spectral response toward Hg 2+ and I − titration experiments. Using Hg 2+ and I − as chemical inputs and the fluorescence intensity signal as outputs, R-2 can be utilized as an INHIBIT logic gate at molecular level.
研究领域:
分析化学
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环境科学
·
生物化学
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产品关联
DOI
高影响因子
TALANTA
·
2021
·
IF 6.057
Huazheng Yu,Yanhong Li,Aisheng Huang
Sialic acid (SA) is a crucial component of glycoproteins and glycolipids on the cellular membrane, which is essential for maintaining the function of cell membranes, such as cell recognition and communication. Simultaneously, sialic acid plays a significant role in many physiological and pathological processes. Hence, it is urgent to develop a simple and sensitive strategy for determining sialic acid. In this work, a new metal-organic framework called UiO-66-NH 2 @B(OH) 2 has been designed and synthesized for the recognition and detection of sialic acid. The boronic acid functional group in UiO-66-NH 2 @B(OH) 2 can bind to a diol moiety of the glycerol side chain of sialic acid, which will attenuate or even quench the fluorescence of UiO-66-NH 2 @B(OH) 2 , thus opening a new road to detect sialic acid. Based on the measurement results, sialic acid can be quantitatively measured in a linear range of 0.05–2.5 mmoL/L with the UiO-66-NH 2 @B(OH) 2 probe. The detection limit of sialic acid is as low as 0.025 mmol/L. Furthermore, the boronic-acid functionalized probe UiO-66-NH 2 @B(OH) 2 displays high sensitivity and high selectivity to recognize the sialic acid in mouse serum samples. Therefore, the developed UiO-66-NH 2 @B(OH) 2 can be used as a promising probe to identify and detect sialic acid in the practical application.
研究领域:
分析化学
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生物化学
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材料科学
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DOI
高影响因子
Redox Biology
·
2025
·
IF 11.9
Xue Shi,Yun Zhao,Hong-Yu Gao,Wei Yang,Jun Liao,Hui-Han Wang,Xiao-Tian Wang,Wei Yan
Diffuse large B cell lymphoma (DLBCL) is a common hematologic malignancy. NFS1 cysteine desulfurase, as a rate-limiting enzyme in the iron-sulfur cluster (ISC) biogenesis, has been reported to be associated with tumor progression. However, the role of NFS1 in DLBCL remains elusive. Here, we showed an upregulation of NFS1 in DLBCL tumor tissues. Knockdown of NFS1 decreased the cell viability and enhanced LDH levels in DLBCL cells. Animal experiments further indicated that downregulation of NFS1 suppresses tumor growth in vivo. NFS1 knockdown increased the lipid reactive oxygen species (ROS) level in cells, and this promotional effect was reversed by ferroptosis inhibitors, but not influenced by other types of cell death inhibitors. This result suggested that NFS1 depletion-impaired cell viability is associated with ferroptosis. Silenced NFS1 aggravated ferroptosis inducers caused cell viability inhibition, lactate dehydrogenase (LDH), and lipid ROS levels enhancement, while the addition of ferroptosis inhibitors abated these trends. Moreover, catalytic residue mutation of NFS1 did not affect its protein expression but decreased the cell viability, which was promoted by NFS1 upregulation, indicating that the protective effect of NFS1 in DLBCL cells was related to its catalytic activity. Further results showed that frataxin (FXN), the upstream activator of NFS1, reduced the cell viability in NFS1 upregulated cells. Consistent with NFS1, FXN silencing aggravated erastin-induced cell viability inhibition and LDH level enhancement. Silencing NFS1 or FXN inhibited the level of iron ions storage-related proteins but promoted the level of transport-related proteins. In addition, silenced NFS1 or FXN displayed an inhibition effect on protein expression of DNA polymerases, but a promotion trend in the phosphorylation of DNA damage markers. In conclusion, we demonstrated that ISC-related proteins NFS1 and FXN protect DLBCL cells from ferroptosis and DNA damage, thus exhibiting an essential role in DLBCL progression.
研究领域:
肿瘤学
·
分子生物学
·
血液病学
·
细胞生物学
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氧化应激
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2014
·
IF 3.468
Xianyi Cao,Fei Shen,Minwei Zhang,Jiajia Guo,Yeli Luo,Jingyue Xu,Ying Li,Chunyan Sun
A rapid, convenient and highly sensitive method for melamine detection was presented based on fluorescence resonance energy transfer between rhodamine B and citrate-stabilized gold nanoparticles . Rhodamine B could be electrostatically adsorbed to the surface of gold nanoparticles and the fluorescence emission of rhodamine B was quenched. Upon addition of melamine, the decreased fluorescence emission recovered, since melamine could induce the aggregation of gold nanoparticles and release the adsorbed rhodamine B. Under the optimal conditions, the fluorescence recovery efficiency was linearly proportional to melamine concentration in the range of 5–1000 μg L −1 . The detection limit was 0.18 μg L −1 , which was greatly lower than the safety limits required in China. The method was successfully applied for melamine detection in milk and powdered infant formula. Many advantages were exhibited by the system such as facile material synthesis, ease of operation, rapid analysis and competitive analytical performance.
研究领域:
分析化学
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食品安全检测
·
纳米技术
✓ 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）