CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Xiangting Hou,Shiqi Liu,Chengze Yu,Likun Jiang,Yingjie Zhang,Guocheng Liu,Chengzhi Zhou,Tao Zhu,Yanjun Xin,Qinghua Yan
Layered double hydroxide (LDHs) precursors were successfully prepared by co-precipitation method, and then the magnetic Cu 1 Fe 0.5 Al 0.5 -LDO catalyst was constructed and characterized after high-temperature calcination. In the Cu 1 Fe 0.5 Al 0.5 -LDO catalyst activated peroxymonosulfate (PMS) to degrade tetrabromobisphenol A (TBBPA) system, the effects of different reaction parameters, including catalyst dosage, PMS concentration, initial pH, common anion and natural water organic matter on the degradation of TBBPA were investigated. The results showed that the degradation rate of TBBPA (15 mg/L) by 0.1 g/L Cu 1 Fe 0.5 Al 0.5 -LDO catalyst and 0.5 mM PMS reached 99.91% within 60 min under the conditions of weak alkaline (pH = 8.5), and the reaction conditions were further optimized by response surface methodology. In addition, the magnetic Cu 1 Fe 0.5 Al 0.5 -LDO catalyst showed certain stability and reproducibility after 5 consecutive repeated reactions. The excellent degradation of TBBPA was mainly attributed to the existence of a large amount of SO 4 •– , •OH and 1 O 2 active species in the Cu 1 Fe 0.5 Al 0.5 -LDO/PMS system. The activation mechanism of PMS and the degradation pathway of TBBPA were proposed. Toxicity Assessment Software Tool (TEST) indicated that the Cu 1 Fe 0.5 Al 0.5 -LDO/PMS system can effectively reduce the harm and risk of TBBPA to the overall environment. This work provided a possible novel idea for the application of Cu 1 Fe 0.5 Al 0.5 -LDO/PMS system in the degradation of brominated phenolic organic pollutants in actual water.
研究领域:
环境科学
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催化材料
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水处理技术
✓ 已验证
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
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2020
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IF 2.029
Lijun Yang,Dongxue Wu,Jun Tang,Yawei Hao,Jingchuan Wang,Xiaochong Zhao,Pan Yang
A simple and environment friendly method for the synthesization of CH 3 NH 3 BF 4 , which exhibits high purity and yield. With close ionic radius, BF 4 − was doped into CH 3 NH 3 PbBr 3 perovskite as substitution of Br − to improve the chemical stability of lead halide perovskite. The results show that the doped-BF 4 − can increase the charge carrier lifetime of CH 3 NH 3 PbBr x (BF 4 ) (3-x) perovskite thin films, meanwhile decrease the rate of recombination. This is mainly due to the larger ionic radius of BF 4 − , which brings about a lower degree X-ray diffraction angle shift, wider ultraviolet visible spectrophotometer absorbance band, red-shift photoluminescence emission peak, and longer fluorescence lifetime.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qili Yu,Qunfu Fan,Wenzheng Chen,Yujie Chen,Chengzhen Du,Guangqiang Fang,Yuxuan Wu,Hezhou Liu
Shape memory polymers may have the highest potential as materials for aerospace engineering because of their low density, adjustable stiffness, and controlled deformation; however, large shock effects are inevitable during the deformation process of space deployment structures. To overcome the impact of shock vibrations on such complex integrated structures, an innovative interpenetrating polymer network (IPN) preparation scheme through phase distribution adjustment is proposed. In this work, thermally responsive shape memory IPNs consisting of polycaprolactone-based polyurethane (PUPCL) and brominated isobutylene isoprene rubber (BIIR) were reported for the first time. The BIIR/PUPCL (5:5) IPNs exhibited high shape fixity and recovery rates (94.4 % and 89.6 %, respectively) and repeatable shape memory behavior. Furthermore, the IPNs presented a favorable loss factor (tan δ) of 0.60 and exhibited effective damping temperature range (tan δ > 0.3) covering 83.6 K (−43.4 °C to 40.2 °C), resulting in impressive damping properties. Finally, the working process of the hinge was simulated by constructing a layer-by-layer panel with smooth deployment 30 s after heating. In addition, a gripper-shaped module based on bending deformation was successfully fabricated, exhibiting particular energy-loss properties and acting as a shock absorber. This study provides a novel design for the preparation of multifunctional polymers with potential applications in hinges and booms for aerospace engineering and intelligent protective devices.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
ATMOSPHERIC ENVIRONMENT
·
2024
·
IF 4.2
Cici Fan,Huijie Yan,Weigang Wang,Zheng Sun,Maofa Ge
Aldehydes are one of the most important oxygenated volatile organic compounds in the atmosphere, contributing to atmospheric radicals such as HO 2 and RO 2 , which play a pivotal role in atmospheric chemistry and the oxidative capacity of the atmosphere. The kinetics, gas-phase products, and SOA formation of pentanal and n-hexanal initiated by Br atoms were studied in this work. The reaction rate constants of n-pentanal and n-hexanal reacting with Br atoms were determined to be (1.77 ± 0.25) × 10 −11 cm 3 molecule −1 s −1 and (2.07 ± 0.29) × 10 −11 cm 3 molecule −1 s −1 at 298 K and 760 Torr, respectively. Key gas-phase products, including smaller aldehydes, carboxylic acids, and alcohols, are known to contribute to atmospheric reactivity and have potential implications for air quality by promoting the formation of secondary pollutants and influencing the oxidative capacity of the atmosphere. The SOA yields were (5.24 ± 0.10)% and (6.00 ± 1.20)% for n-pentanal and n-hexanal, respectively, higher than the SOA yields of the aldehydes reaction initiated by OH radicals. The higher SOA yields observed from Br atoms oxidation compared to OH radical oxidation highlight the necessity to re-evaluate the role of halogen chemistry in atmospheric processes, particularly in regions where halogen compounds are prevalent. This research enhances our understanding of the atmospheric fate of aldehydes and highlights the importance of considering halogen-driven oxidation pathways in atmospheric models.
研究领域:
环境科学
·
大气化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhijie Wu,Jing Zou,Sheng Li,Linfeng He,Qingsong Li,Zhenming Zhou,Yao Huang,Zhimin Yang,Jun Ma
Although Cu(II) can trigger peroxymonosulfate (PMS) oxidation of pollutants, it is only effective under alkaline environments and is susceptible to interference by aqueous matrix components. In this study, cysteine, a natural thiol and amino acid, was found to greatly improve the performance of tetrabromobisphenol A (TBBPA) elimination in the Cu(II)/PMS system across a broad pH range of 4.0–12.0. The cysteine/Cu(II)/PMS system achieved a 94.34 % elimination of TBBPA within 10 min at pH 7.0, which had a 7.55-fold increase in efficiency relative to the Cu(II)/PMS system, and superior to the previously-reported hydroxylamine and gallic acid-enhanced Cu(II)/PMS systems. Cu(III)-(cysteine) 2 , as opposed to radicals, was the main reactive species leading to the removal of TBBPA, contributing at least 91.53 %. Cysteine first coordinated with Cu(II) through sulfhydryl groups (−SH) and rapidly converted Cu(II)-(cysteine) 2 to Cu(I)-(cysteine) 2 , then Cu(III)-(cysteine) 2 was formed finally by the further oxidation of PMS on Cu(I)-(cysteine) 2 . This enhancement was further extended to other thiols including cysteamine, β-mercaptoethanol and mercaptosuccinic acid. Four potential degradation pathways of TBBPA were inferred from the determined nine degradation intermediates. A marked decline in the toxicity of the reaction solutions was observed after the elimination of TBBPA. Furthermore, the cysteine/Cu(II)/PMS system shown high anti-interference performance with common cations and anions (Ca(II), Mg(II), NO 3 – , SO 4 2– , HCO 3 – and Cl – ), humic acid and actual water samples. Overall, this study provided a promising approach to extend the working pH range of Cu(II)/PMS system and its anti-interference capability with actual water matrix, which was favorable for its potential utilization in water treatment.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
·
2025
·
IF 12.6
Zhe Zhang,Guangyu Jia,Qi Wang,Yamei Yu,Xiaolong Tang,Heqing Zheng,Xinyu Yang,Yao Xiao,Yangrui Ou,Jingjing Jiang,Hua Guo,Ye Wang,Shiyong Li
Intranasal drug delivery via nanocarriers has long been a research focus for enhancing drug concentration in the brain. However, the strategy of exploiting blood–brain barrier (BBB) alterations in atherosclerotic mouse models to enhance nanoparticle-mediated delivery of bromocriptine to the hypothalamus for the treatment of prolactinomas with hyperprolactinemia has not yet been reported. This study reveals that in patients with prolactinomas complicated by arteriosclerosis, bromocriptine therapy more effectively attenuates postoperative elevations in prolactin levels. In a mouse model, liposome-encapsulated bromocriptine efficiently traversed the nasal mucosa and entered the intracranial space. Compared with normal mice, bromocriptine-loaded liposomes delivered higher bromocriptine concentrations to the hypothalamus. Single-cell RNA sequencing revealed a significant upregulation of organic anion-transporting polypeptide 1a4 (Oatp1a4) expression in the brain endothelial cells of atherosclerotic mice. Importantly, bromocriptine-loaded liposomes more effectively reduced prolactin levels in a mouse model of prolactinoma with concurrent atherosclerosis. This study provides a theoretical foundation for the precision treatment of prolactinomas in arteriosclerosis.
研究领域:
药理学
·
神经科学
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肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Yujie Chen,Fanlei Qin,Jiawen Wang,Kai Yang,Yinyan Li,Gongxun Bai
Perovskite quantum dots with halogen elements (Cl, Br, I) have been extensively studied due to their unique optoelectronic properties. However, the spectral properties of luminescent materials continue to present challenges in perovskite quantum dot glasses. Here, Eu3+-doped CsPbBr3 quantum dot glasses were successfully prepared. Meanwhile, optimizing the doping concentration of Eu3+ significantly improved the formation of quantum dots and enhanced their fluorescence intensity. After a heating–cooling cycle, the CsPbBr3:0.5% Eu3+ glass still retained 95% of its initial value. By coating CsPbBr3:0.5% Eu3+ glass powder with red phosphor on a blue chip, a white LED with a CCT of 5417 K can be prepared. Therefore, Eu3+-doped CsPbBr3 quantum dot glasses demonstrate significant potential as an efficient material for optical lighting applications.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Jiayu Gu,Mingzhou Wu,Linlin Wang,Fengling Liu,Suhao He,Minrui Ding,Yuye Yao,Neng Tao,Haitao Sha,Zhaobing Guo,Huimin Zhou,Pin Zhou,Pengxiang Qiu
Photocatalyst modification by energy level engineering is crucial for efficient free radical generation. Here, a novel strategy was employed to construct bromine-doped Bi 2 MoO 6 (BMO-Br) followed by an in-situ approach using Cetyltrimethylammonium bromide (CTAB) as the bromine (Br) precursor. The Br doping effectively modulated the energy band, increasing the oxygen vacancy concentration in Bi 2 MoO 6 . The modification significantly enhanced photoinduced charge separation and active free radical generation, leading to superior photocatalytic performance. The photocatalytic bacteriostatic and sulfamethazine (SM) degradation efficiency over BMO-Br-4 reached 100% and 70% within 60 min and 150 min, respectively. This work highlighted a facile yet effective strategy for tailoring the photocatalyst properties, demonstrating promising potential for various photocatalytic applications.
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
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2018
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IF 6.653
Shaodong Hou,Li Ling,Dionysios D. Dionysiou,Yuru Wang,Jiajia Huang,Kaiheng Guo,Xuchun Li,Jingyun Fang
Halides and natural organic matter (NOM) are inevitable in aquatic environment and influence the degradation of contaminants in sulfate radical (SO4•–)-based advanced oxidation processes. This study investigated the formation of chlorate in the coexposure of SO4•–, chloride (Cl–), bromide (Br–) and/or NOM in UV/persulfate (UV/PDS) and cobalt(II)/peroxymonosulfate (Co/PMS) systems. The formation of chlorate increased with increasing Cl– concentration in the UV/PDS system, however, in the Co/PMS system, it initially increased and then decreased. The chlorate formation involved the formation of hypochlorous acid/hypochlorite (HOCl/OCl–) as an intermediate in both systems. The formation was primarily attributable to SO4•– in the UV/PDS system, whereas Co(III) played a significant role in the oxidation of Cl– to HOCl/OCl– and SO4•– was important for the oxidation of HOCl/OCl– to chlorate in the Co/PMS system. The pseudo-first-order rate constants (k′) of the transformation from Cl– to HOCl/OCl– were 3.32 × 10–6 s–1 and 9.23 × 10–3 s–1 in UV/PDS and Co/PMS, respectively. Meanwhile, k′ of HOCl/OCl– to chlorate in UV/PDS and Co/PMS were 2.43 × 10–3 s–1 and 2.70 × 10–4 s–1, respectively. Br– completely inhibited the chlorate formation in UV/PDS, but inhibited it by 45.2% in Co/PMS. The k′ of SO4•– reacting with Br– to form hypobromous acid/hypobromite (HOBr/OBr–) was calculated to be 378 times higher than that of Cl– to HOCl/OCl–, but the k′ of Co(III) reacting with Br– to form HOBr/OBr– was comparable to that of Cl– to HOCl/OCl–. NOM also significantly inhibited the chlorate formation, due to the consumption of SO4•– and reactive chlorine species (RCS, such as Cl·, ClO· and HOCl/OCl–). This study demonstrated the formation of chlorate in SO4•–-based AOPs, which should to be considered in their application in water treatment.
研究领域:
环境科学
·
水处理工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Energy
·
2022
·
IF 19.069
Jingwei Zhu,Benlin He,Mengxin Wang,Xinpeng Yao,Hao Huang,Cong Chen,Haiyan Chen,Yanyan Duan,Qunwei Tang
The high-quality perovskite film with reduced defect states and released lattice strain is crucial to the performance development of perovskite solar cells (PSCs). Herein, carbon quantum dots with bromine functional groups (Br-CQDs) are firstly synthesized and creatively employed as additive and buried interface modifier to enhance perovskite film quality. Arising from the strong anchor binding of bromine and oxygen-containing groups in Br-CQDs with uncoordinated Pb 2+ and Cs + ions within perovskite and the insertion of Br-CQDs into perovskite lattice, the incorporation of Br-CQDs exerting the role of an “adhesive” can not only effectively retard nucleation and growth processes, heal defect states and release lattice strain of perovskite film, but also regulate interfaces energy level. As a result, the charge recombination and energy loss inside PSCs are evidently suppressed thanks to the resultant high-quality perovskite film and more matching interfaces energy level. Finally, the hole-free PSC achieves an exciting PCE up to 10.79% with an ultrahigh V OC of 1.651 V, which is to date the highest efficiency and V OC for the mesoporous all-inorganic CsPbBr 3 PSCs without hole transport materials. Furthermore, the optimized PSCs display a superior long-term stability under air conditions with 85% RH at 85 °C and continuous illumination.
研究领域:
材料科学
·
光伏技术
·
能源研究
✓ 已验证
DOI
高影响因子
Carbon Neutralization
·
2024
·
IF 0
Longwei Li,Rongrong Li,Shaojie Zhou,Wenjun Xu,Yu Li,Jingmin Zhang,Lei Gao,Xiong Pu
Zinc bromine flow batteries (ZBFBs) are well suited for stationary energy storage due to their attractive features of high energy density and low cost. Nevertheless, the ZBFBs suffer from low power density and limited efficiency owing to the relatively severe polarization of the Br 2 /Br − redox couple. Herein, a three-dimensional (3D) hierarchical composite electrode based on core-shell Ni/NiO heterostructures anchored on graphite felt (Ni/NiO@GF) is designed to promote the kinetics of the Br 2 /Br − couple, so as to improve the power density and efficiency of the ZBFB. In this design, the highly conductive carbon felt and Ni cores provide a composite electrode with a 3D electron transporting framework to guarantee excellent electronic conductivity, while the NiO shells possess great absorption ability to Br 2 and brilliant catalytic activity for the Br 2 /Br − redox reaction to reduce the electrochemical polarization. As a result, an enhanced ZBFB with Ni/NiO@GF electrode shows an outstanding energy efficiency of 86% at 20 mA cm −2 and can be operated at a current density of up to 160 mA cm −2 with a respectable energy efficiency of 67%. These results exhibit a promising strategy to fabricate catalytic electrodes for high-performance ZBFBs.
研究领域:
电化学
·
能源存储
·
材料科学
✓ 已验证
DOI
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Hongji Jiang,Zhong Wang,Bing Mao,Yan Bing,Ning Sun,Jie Yuan
To investigate the effects of steric hindrance fluorene and heavy-atom bromine on the general optoelectronic properties of star-shaped organic emitters based on 9-(2-cyanophenyl) carbazole ( OCzPhCN ) frameworks, heavy element of bromine and steric hindrance fluorene were introduced into OCzPhCN to produce four derivatives of 2-(3-bromo-9H-carbazol-9-yl)benzonitrile ( BrCzPhCN) , 2-(3-bromo-6-(9-(4-ethoxyphenyl)-9H-fluoren-9-yl)-9H-carbazol-9-yl)benzonitrile (BrFCzPhCN) , 2-(3-(9-(4-ethoxyphenyl)-9H-fluoren-9-yl)-9H-carbazol-9-yl)benzonitrile (FCzPhCN) and 2-(3,6-bis(9-(4-ethoxyphenyl)-9H-fluoren-9-yl)-9H-carbazol-9-yl)benzonitrile (2FCzPhCN) . The fluorene units obviously improve the thermal stability of the obtained compounds, and 2FCzPhCN has the highest thermal stability with 5 % mass heat loss temperature reaching 447 °C. In different polar solvents, the absorption peaks wavelength of OCzPhCN , FCzPhCN and 2FCzPhCN are basically unchanged, and the redshifted emission peaks are positively correlated with solvent polarity. The photoluminescence quantum yields (PLQYs) of OCzPhCN , BrCzPhCN , FCzPhCN , BrFCzPhCN and 2FCzPhCN powders were 20.17 %, 5.43 %, 30.75 %, 3.27 % and 23.56 %. The fluorescence and phosphorescent quantum efficiencies of OCzPhCN , BrCzPhCN, FCzPhCN , BrFCzPhCN and 2FCzPhCN powders are 9.76 % and 10.41 %, 1.2 % and 3.23 %, 28.45 % and 2.3 %, 3.27 % and 0 %, 23.56 % and 0 %. OCzPhCN , BrCzPhCN and FCzPhCN powders show obvious room temperature phosphorescent emission, and the phosphorescent emission lifetime of OCzPhCN , BrCzPhCN and FCzPhCN powders at 561 nm, 576 nm and 568 nm are 193.17 ms, 18.65 ms and 7.25 ms. Compared with OCzPhCN, the introduction of bromine decreases the PLQY and the phosphorescent lifetime of BrCzPhCN powder, while the fluorescence quantum efficiency of the compound FCzPhCN powder has been improved. The corresponding single-triplet energy splitting (ΔE ST ) of OCzPhCN , FCzPhCN and 2FCzPhCN in solutions are 0.49 eV, 0.63 eV and 0.63 eV, and the corresponding ΔE ST values of OCzPhCN, BrCzPhCN FCzPhCN powders are 1.19 eV, 0.74 eV and 0.55 eV. The steric hindrance fluorene units result in smaller and stabilized ΔE ST in the solid powder states, and the same situation is opposite in the unimolecular solutions. The maximum external quantum efficiency of organic light-emitting diode based on 10,10′-(4,4′-sulfonylbis (4,1-phenylene)) bis (9,9-dimethyl-9,10-dihydroacridine) hosted by OCzPhCN reaches 12.7 %, and the external quantum efficiency at 100 cd/m 2 rolls down to 11 %. OCzPhCN is the best emitters in terms of room temperature phosphorescent emission and host applications.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）