SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Kaibo Huang,Jiahao Liang,Jin Wang,Yuanxi Ouyang,Rui Wang,Ting Tang,Yusen Luo,Xueqin Tao,Hua Yin,Zhi Dang,Guining Lu
This study aimed to investigate the effects of nitrate on the ultraviolet (UV) treatment of simulated washing wastes containing Trion X-100 (TX-100) surfactant and 4,4′-dibromodiphenyl ether (BDE-15) pollutant. The presence of nitrate accelerated the photodegradation of BDE-15 and TX-100, because they reacted with reactive oxygen species (ROS) produced from conversion between nitrate and nitrite. Due to nitrite having a stronger radical quenching property than nitrate, nitrite hindered TX-100 decay while the photodegradation rate of BDE-15 was similar to that in the presence of nitrate. This indicated that nitrate/nitrite affected BDE-15 photodegradation by photosensitization and TX-100 loss by ROS attack. An increased TX-100 concentration increased the loss of total inorganic nitrogen possibly owing to an increase in organic nitrogen formation through TX-100 nitration reactions. At pH < 7 HOONO rapidly isomerized to NO 3 − , and at pH = 7–9 it homolyzed to ONOO − , which increased OH production to decay the BDE-15 and TX-100 and also increased NO 2 − formation. BDE-15 mainly underwent debromination, and some rearrangement, ring formation, nitration and hydroxylation products were detected, indicating that the produced OH and NO 2 attacked the BDE-15 and products. Furthermore, broken-chain, carboxylation , hydroxylation and nitro products were detected by Liquid chromatography high resolution mass spectrometry (LC-HRMS). Escherichia coli was used to assess the toxicity of washing waste containing nitrate: the presence of nitrate will increase the wastes' toxicity during UV treatment. Therefore, the presence of nitrate is deleterious to the UV treatment of washing wastes, and it is important to remove nitrates and nitrites from washing waste before UV irradiation.
研究领域:
环境科学
·
化学工程
·
毒理学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Yanhua Li,Zhan Lai,Zhujun Huang,Haiyan Wang,Chenxi Zhao,Guihua Ruan,Fuyou Du
Bismuth oxybromide/molybdenum disulfide/graphene oxide (BiOBr/MoS 2 /GO) heterojunction composites were fabricated to modulate the adsorption ability and photocatalytic degradation performance toward oxytetracycline (OTC). The flowerlike BiOBr/MoS 2 /GO composites demonstrated excellent photocatalytic activies for the OTC degradation. Specifically, OTC, tetracycline, chlorotetracycline, and doxycycline were simultaneously removed with degradation rates higher than 98% under visible light irradiation within 40 min. Radical trapping experiments indicated that photogenerated holes (h + ), hydroxyl radicals ( OH), and superoxide radicals ( O 2− ) played crucial roles in photocatalytic OTC degradation. Further, Possible transformation pathway and photocatalytic mechanism were proposed by investigating the intermediates in OTC degradation process.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Science Advances
·
2022
·Vol. 8
·期 28
·
IF 14.957
Chunlong Dai,Linyu Hu,Xuting Jin,Ying Wang,Rui Wang,Yukun Xiao,Xiangyang Li,Xinqun Zhang,Li Song,Yuyang Han,Huhu Cheng,Yang Zhao,Zhipan Zhang,Feng Liu,Lan Jiang,Liangti Qu
Microbatteries (MBs) are promising candidates to provide power for various miniaturized electronic devices, yet they generally suffer from complicated fabrication procedures and low areal energy density. Besides, all cathodes of current MBs are solid state, and the trade-off between areal capacity and reaction kinetics restricts their wide applications. Here, we propose a dual-plating strategy to facilely prepare zinc-bromine MBs (Zn-Br 2 MBs) with a liquid cathode to achieve both high areal energy density and fast kinetics simultaneously. The Zn-Br 2 MBs deliver a record high areal energy density of 3.6 mWh cm −2 , almost an order of magnitude higher than available planar MBs. Meanwhile, they show a polarity-switchable feature to tolerate confusion of cathode and anode. This strategy could also be extended to other battery systems, such as Zn-I 2 and Zn-MnO 2 MBs. This work not only proposes an effective construction method for MBs but also enriches categories of microscale energy storage devices.
研究领域:
储能
·
微型电池技术
·
电化学
·
材料科学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 5
·879-888
·
IF 7.779
Pengfei Hao,Xing Liu,Chunyu Guo,Guozheng Zhao,Gaopeng Li,Junju Shen,Yunlong Fu
The development of new stimuli-responsive materials with controllable properties has been highly desirable in the past decade owing to their increasing application demand in various areas. In this work, two tripyridyl-triazine-based zinc bromide complexes, [ZnBr2(2-TPT)] (1) and [ZnBr2(2-TPT)]·C6H5CH2OH (2) (2-TPT = 2,4,6-tri(2-pyridyl)-1,3,5-triazine), have been prepared through the solvent evaporation method, and exhibit lattice solvent controlled photochromic performance in the crystalline state as well as solvent-induced photochromism in the solution state. Furthermore, the two complexes display tunable photochromic and photoluminescence properties in the crystalline state through the reversible desorption–adsorption of lattice benzyl alcohol molecules. Crystalline 1 and 2 are very sensitive to triple photostimulation (sunlight, ultraviolet light and X-ray irradiation) and exhibit excellent photochromic behaviors with distinct coloration contrast (light blue for 1vs. deep blue for 2), which is ascribed to different supramolecular frameworks via weak interactions (lone pair–π and π⋯π interactions). Meanwhile, crystalline 1 and 2 also exhibit completely different quenching efficiency during the coloration–decoloration processes, which is a typical example of a photo-stimuli dual-output responsive system and could be potentially applied in optical switches. The photochromic mechanism of photoinduced intermolecular electron transfer (PIET) has been carefully verified by the combination of experimental and theoretical investigations.
研究领域:
材料化学
·
光化学
·
晶体工程
✓ 已验证
DOI
高影响因子
TALANTA
·
2018
·
IF 4.244
Yang Zhou,Jianxiu Du,Zhen Wang
Fluorescein and its derivatives, including 4′,5′–dibromofluorescein, 2′,7′–dichlorofluorescein and 2′,4′,5′,7′–tetrabromofluorescein can be employed as efficient coreactants for luminol reaction. Under an alkaline condition they reacted with luminol to produce measureable chemiluminescence (CL) in the absence of any extra–oxidant. Cobalt ion (Co 2+ ) significantly enhanced the CL emission of the reaction. The CL emission was strongly dependent on the concentration of carbonate buffer used; higher concentration of carbonate buffer provided more intense CL emission. The system had two emission peaks locating at 425 nm and 535 nm, respectively. With 4′,5′–dibromofluorescein as the coreactant for luminol reaction, a new CL method was developed for the detection of Co 2+ . The procedure allowed the linear detection of Co 2+ in the range of 5–1000 nmol/L. The limit of detection (LOD) and limit of quantitation (LOQ) were 1.8 nmol/L and 5.0 nmol/L, respectively. The intra–day precision (n = 11) and inter–day precision (n = 3) was 3.2% and 4.7% for replicated measurements of 0.2 μmol/L Co 2+ solution. The method was successfully applied to the determination of Co 2+ in blue silica gel samples.
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
CHEMISTRY OF MATERIALS
·
2021
·
IF 9.811
Shixun Wang,Stephen V. Kershaw,Andrey L. Rogach
In this study, conventional saturation recrystallization process was found to produce a complex mixture instead of pure Dion-Jacobson (DJ)-phase ODASnBr4 perovskite single crystals (ODA denotes protonated 1,8-octanediamine), which originated from the strong hydrogen bonding in diammonium cations and the interaction with polar hydrogen bromide solution, resulting in the formation of impurities. Thus, additional primary alcohols, including ethanol, 1-propanol, 1-butanol, and 1-pentanol, were introduced to treat that mixture with an attempt to remove undesired byproducts, while also resulting in the molecular doping and enhanced crystallinity of DJ perovskites. The formation of O–H...Br hydrogen bonds between [SnBr6]4– octahedron slabs and alcohols promoted the lattice coordination of the perovskites and the removal of undesired surface-absorbed water and byproducts, thereby achieving ODASnBr4[alcohol] perovskite microcrystals with high photoluminescence quantum yield close to 90%. Their thermal stability and oxidation resistance were also significantly enhanced as a result of improved lattice crystallinity and surface capping by dopants. The strategy introduced here offers prospects for further development of lead-free DJ perovskite materials with strong emissions and reliable stabilities.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Hao Wu,Jiacheng Pi,Dacheng Zhou,Qi Wang,Zhangwen Long,Jianbei Qiu
All-inorganic perovskite quantum dots have been widely used in solar cells, LED, laser and scintillator in recent years. However, the essence of ion migration in perovskite lattice can cause the ion vacancies exist, which can directly affect the luminescence process. Herein, we focus on the effect of monovalent cation vacancies on the CsPbBr 3 lattice, and realize the adjusting lattice structure of the CsPbBr 3 QDs to change the luminescence lifetime by controlling the formation of monovalent cation vacancies. The results show that the existence of monovalent cation vacancies can be controlled by controlling dosages of Cs + precursor and can make the CsPbBr 3 lattice produce local lattice micro distortion and reduce luminescence lifetime, which is beneficial to realize the rapid and efficient X-ray imaging of scintillating crystals. Experimental result is also verified by density functional theory (DFT).
研究领域:
材料科学
·
光学
·
理论计算
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Ling Gao,Fan Zhong,Yan Tong,Sheng Zhang,Jiale You,Huiping Wei,Xiangxiang Yu,Siqi Xu,Guowei Zhao
Solid electrolytes with excellent formability and high room-temperature Li-ion conductivities used in bulk-type all-solid-state lithium-metal batteries (ASSLBs) are expected to suppress the formation of Li dendrites that affects the application of metal Li anodes with high energy density. However, voids and cracks within sintered electrolytes lead to short-circuiting of ASSLBs due to the formation of Li dendrites. This work aimed to develop solid electrolytes with high formability and high room-temperature Li-ion conductivities that can suppress Li dendrites’ formation in ASSLBs. Three indicators of bulk moduli, lithium-ion migration energies, and energies above the hull were investigated: formability, ionic conductivity, and thermodynamic stability. The 109 inorganic materials containing elements of Li and Br listed in the open web-based database of the Materials Project were surveyed due to their weak Coulombic interaction with Li ions and high polarizability. LiGaBr4 with monoclinic symmetry (LGB, S.G.: P121/a1) was focused on due to its lower values for all three analyzed indicators. A ball milling mechanochemical synthesis method was adopted to synthesize LGB. It indicated that the obtained LGB possessed a monoclinic structure with a lithium ionic conduction of 2.0 × 10–5 S cm–1 (cold isostatic pressed powder) at 25 °C. The ionic conductivity was nearly three times higher than that of the conventional sintered LGB and comparable to that of a typical oxide-type electrolyte of LISICON-type Li3.55(Ge0.45Si0.10V0.45)O4 (LGSV) at 25 °C, which is appealing for applying the sintered samples for Li-metal anodes. The SEM and the distribution of relaxation times (DRT) analysis demonstrated that LGB contributed minimal grain-boundary resistance due to tight connections between the particles, while the LGSV oxides contributed an extremely large grain-boundary resistance. An ASSLB using LGB powder as an electrolyte, bare LiCoO2 as a cathode, and lithium metal as the anode exhibited the ability to function smoothly, while short-circuiting occurred at the second cycle with LGSV, demonstrating that LGB is a pure ionic conductor and may be suitable for use in ASSLB that can prevent Li dendrites with electrochemical stability.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
·
2023
·Vol. 41
·期 1
·55-61
·
IF 1.9
Feng Hua,Xin Du,Zhenyu Huang,Yiting Gu,Jianfeng Wen,Fuchi Liu,Junxue Chen,Tao Tang
Self-powered photodetectors (SPPDs) are attracting considerable publicity due to their superiority over conventional photodetectors (PDs) in terms of high sensitivity, fast response, and no need for an external power supply. Halide perovskites are much anticipated in SPPDs for their unusual photoelectronic properties. This work developed a Schottky junction ${{\rm CsPbBr}_3}/{\rm n} \text{-} {\rm Si}$ SPPD by growing stable all-inorganic ${{\rm CsPbBr}_3}$ microcrystals on an n-Si substrate using a solution method. At zero bias, such Schottky SPPD has a very weak dark current (0.3 pA), a wide linear dynamic range (LDR, 110 dB), a sizeable on–off ratio (${\gt}{{10}^3}$), and high detectivity (${1.05} \times {{10}^{11}}\;{\rm Jones}$). Through the research of this project, it is expected to obtain a way to prepare Schottky photodiodes with high stability and self-driving capability.
研究领域:
材料科学
·
光电子学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2013
·
IF 2.004
Zhongjian Li,Min Yao,Jun Lin,Bin Yang,Xingwang Zhang,Lecheng Lei
The selective sorption of pentachlorophenol (PCP) in a multiple solute system provides the possibility of using the cetyltrimethylammonium bromide (CTMAB)/bentonite one-step process as a promising technique for hydrophobic organics removal from wastewater. The PCP sorption mechanism, especially the effects of coexisting solutes, was studied. Compared to raw bentonite and conventional CTMAB modified organobentonite, the one-step process exhibited higher PCP removal efficiency. In a single solute system, the PCP sorption isotherm implied that the dominating sorption mechanism is a partition mechanism. The logarithms of sorption coefficients (Kd) for different organics are linearly related to the logarithm of their octanol–water partition coefficients (Kow). In a multiple solutes system, phenol and 2,4-dichlorophenol (2,4-DCP) could effectively enhance PCP sorption. The PCP sorption coefficient increases in the order: PCP/phenol < PCP/2,4-DCP < PCP/phenol/2,4-DCP. The PCP sorption enhancement is likely resulted from the interlayer space expansion and the organic carbon content increase. On the basis of the comparison between the single and the multiple solute systems, phenol and 2,4-DCP sorption coefficients decrease in the order: Kd of a single solute system > Kd of a binary solute system > Kd of a ternary solute system, and no enhancement for phenol and 2,4-DCP sorption was observed.
研究领域:
环境科学
·
污染控制
✓ 已验证
DOI
高影响因子
Journal of Nanomaterials
·
2020
·
IF 1.98
Yan Zhang,Jiarong Li,Hongyuan Liu
The batch experiments of photocatalytic oxidation-reduction of bromate and ibuprofen (IBP) by graphene oxide (GO) and TiO2 heterostructure doped with F (FGT) particles were conducted. The performance and mechanism of synergistic removal of bromate and IBP by FGT were discussed. The results show that a demonstrable synergistic effect and excellent removal rate of bromate and IBP by FGT were exhibited. When pH is 5.2 and the dosage of FGT is 0.1 g/L, the reaction rate constants of bromate and IBP increased from 0.0584 min-1 and 0.4188 min-1 to 0.1353 min-1 and 0.4504 min-1, respectively, compared with the degradation of bromate or IBP alone. The reaction of photocatalytic synergistic degradation is appropriately fitted through Langmuir-Hinshelwood first-order kinetics. The mechanism of synergistic removal of bromate and IBP by FGT was discussed. And electrons (e-), hydroxyl radical (⋅OH), and superoxide radical (⋅O2-) are the main active species. The electrons play a main role in the bromate reduction, and bromine is the only reduction product, while the oxidation of IBP is the result of ⋅OH and ⋅O2-, and ⋅OH plays a key role. The recombination of electrons and holes is inhibited by simultaneous consumption of bromate and IBP, which makes full use of the redox properties of FGT and plays a synergistic role in the removal of pollutants. The results indicate that photocatalytic oxidation-reduction by FGT is a promising, efficient, and environmental-friendly method for synchronous removal of combined pollution in water.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
·
2019
·Vol. 103
·期 1
·23-27
·
IF 1.65
Xiang Leilei,Sheng Hongjie,Bian Yongrong,Kang Jia,Yang Xinglun,Herzberger Anna,Suanon Fidèle,Wang Fang
Polybrominated diphenyl ethers (PBDEs) derived from e-waste dismantling, tend to easily bioaccumulate in vegetables. In this study, an optimized sample pretreatment method based on graphene oxide (GO) dispersed acid silica gel was used to determine PBDEs levels in vegetables. The recovery efficiency of the optimized method ranged between 90.3%–107.5% with the detection limit (LOD) being within 0.17–1.8 ng g −1 . Vegetable samples were grown nearby an e-waste recycling plant in Nanjing, China, and analyzed using the optimized method. The concentrations of ΣPBDEs in the samples ranged from 12.1 to 20.1 ng g −1 . This study developed an optimized sample pretreatment method to determine PBDEs in vegetables nearby e-waste contaminated sites and provides insights on the potential risks derived from e-waste dismantling to the surrounding environment.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）