Surfaces and Interfaces
·
2024
·
IF 5.7
Qing Zhu,Nan Lan,Weikang Xu,Yifan Liu,Qiao Wang,Yiting Cao,Hong Deng,Xueming Liu,Yuan Liu
Addressing the formidable challenge of treating significant quantities of organic dyes and heavy metal chromium in tannery wastewater, this study synthesized a novel Z-scheme La-MOF/BiOBr composite heterojunction photocatalyst via the hydrothermal method and established an efficient visible-light photocatalytic system. To comprehensively evaluate the photocatalytic redox activity, rhodamine B (RhB) and heavy metal Cr(VI) were selected as target pollutants. Kinetic analysis revealed that the optimal LM-BB-50 catalyst achieved over 99 % degradation of RhB and Cr(VI) within 15 min illumination, indicating the remarkable enhancement of Z-scheme heterojunction in photocatalytic oxidation and reduction efficiency. Based on various photoelectric analysis techniques, it was elucidated that the superior activity of the Z-scheme heterojunction originated from the modulation of the band structure upon La-MOF and BiOBr integration, significantly improving visible light absorption, electron-hole pair separation efficiency, and endowing the energy band with robust redox capabilities. Free radical capture and quenching experiments confirmed that photogenerated holes and superoxide radicals played a crucial role in RhB oxidation , while photogenerated electrons were the primary active species for Cr(VI) reduction.
研究领域:
环境科学
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材料科学
·
化学工程
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DOI
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Yanan Yang,Yu Zhang,Hong Zheng,Baichao Zhang,Qi Zuo,Kaiyue Fan
A key challenge in trace heavy metals removal from drinking water by adsorption technology is to achieve high adsorption capacity and rapid uptake speed of adsorbent. Herein, we report a functionalized double modified covalent organic framework (DMTD–COF–SH) bearing high-density sulfur and nitrogen chelating groups provided simultaneously by 2,5-dimercapto-1,3,4-thiadiazole (DMTD) and 1,2-ethanedithiol, which was prepared via a facile one-pot thiol-ene “click” reaction. PXRD , FTIR, XPS, SEM, BET and 13 C MAS NMR confirmed their successful graft, and DMTD was found to be more easily grafted on the COF surface layer than 1,2-ethanedithiol. The as-prepared DMTD–COF–SH showed remarkable adsorption capacity and ultrafast uptake dynamics to trace heavy metals owing to the synergistic effects resulting from densely populated sulfur and nitrogen chelating groups within ordered COF mesopores and at the COF surface. On the basis of the drinking water treatment units standard NSF/ANSI 53–2020, when the adsorbent dosage was 10 mg/30 mL and 20 mg L −1 calcium ions coexisted, the lead concentration decreased from initial 150 μg L −1 to 2.89 μg L −1 within 10 s, far below the allowable limit of world health organization (WHO) drinking water standard (10 μg L −1 ), and the maximum adsorption capacity meeting the standard attained 14.22 mg g −1 . The adsorbent also exhibited excellent stability, wide applicable pH range and outstanding adsorption performance for coexisting trace lead, mercury, cadmium, chromium (VI) and copper in tap water, indicating that the DMTD–COF–SH material has excellent application prospect for trace heavy metals removal from drinking water.
研究领域:
环境科学
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材料科学
·
水处理
·
化学工程
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DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-12
·
IF 16.6
Hu Yi,Rogée Lukas,Wang Weizhen,Zhuang Lyuchao,Shi Fangyi,Dong Hui,Cai Songhua,Tay Beng Kang,Lau Shu Ping
Engineering piezo/ferroelectricity in two-dimensional materials holds significant implications for advancing the manufacture of state-of-the-art multifunctional materials. The inborn nonstoichiometric propensity of two-dimensional transition metal dichalcogenides provides a spiffy ready-available solution for breaking inversion centrosymmetry, thereby conducing to circumvent size effect challenges in conventional perovskite oxide ferroelectrics. Here, we show the extendable and ubiquitous piezo/ferroelectricity within nonstoichiometric two-dimensional transition metal dichalcogenides that are predominantly centrosymmetric during standard stoichiometric cases. The emerged piezo/ferroelectric traits are aroused from the sliding of van der Waals layers and displacement of interlayer metal atoms triggered by the Frankel defects of heterogeneous interlayer native metal atom intercalation. We demonstrate two-dimensional chromium selenides nanogenerator and iron tellurides ferroelectric multilevel memristors as two representative applications. This innovative approach to engineering piezo/ferroelectricity in ultrathin transition metal dichalcogenides may provide a potential avenue to consolidate piezo/ferroelectricity with featured two-dimensional materials to fabricate multifunctional materials and distinguished multiferroic.
研究领域:
材料科学
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纳米技术
·
电气工程
·
物理学
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Lanying Lu,Debo He,Rong Fang,Chengsheng Ni,John T.S. Irvine
The valorization of the CO 2 greenhouse gas is important in decarbonization using the renewable energies. Intermediate temperature solid oxide electrolysis cells (SOEC) working at around 800 °C can be useful in activating the strong C O bond (799 kJ mol −1 ) in CO 2 for the production of CO and decreasing the precious electricity by partially using the heat instead. Ceria/Co doping on the stable chromite is employed to design a composite oxide/metal cathode with a unique ceria decorating Co 0 for the direct CO 2 electrolysis. The in situ outgrowth of Co 0 from the B site activates the ceria exsolution from the A site, or vice versa , producing a well-adhered heterojunction for the activation of CO 2 . A high current and stable density above 1 Acm −2 for 300 h is obtained at a bias of 1.3 V for the CO 2 at a Faraday efficiency close to unity. The higher electrochemical performance of the cell with Ce/Co 0 codoped cathode is explained by the oxygen storage property of the ceria rather than the direct activation of CO 2 over ceria. This work presents a novel method of constructing metal/oxide cathode for efficient CO 2 analysis and in-depth mechanistic explanation for the metal/oxide hetero-structure in CO 2 activation.
研究领域:
材料科学
·
电化学
·
能源转换与存储
·
环境科学
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DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2020
·Vol. 81
·期 6
·1114-1129
·
IF 1.638
Wang Jun,Xie Qinglong,Li Ao,Liu Xuejun,Yu Fengwen,Ji Jianbing
In this study, an efficient route to synthesizing polyethyleneimine-modified ultrasonic-assisted acid hydrochar (PEI-USAH) is developed and reported. Ultrasonic irradiation technique was used as surface modification method to shorten the crosslinking reaction for hydrochar and polyethyleneimine (PEI). The PEI-USAH showed an excellent adsorption capacity for Cr(VI) from aqueous solution. The physicochemical properties of this PEI-modified adsorbent were comparatively characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, Brunauer–Emmett–Teller analysis and CNHS analysis. The effects of contact time, initial pH, and biosorbent dose on adsorption capacities were investigated. The batch adsorption experiments showed that PEI-USAH possessed the maximum adsorption capacities of 94.38 mg/g and 330.84 mg/g for initial Cr(VI) concentration of 100 mg/L and 500 mg/L, respectively. Furthermore, this adsorption process could be fitted to Langmuir adsorption and described by the pseudo second order kinetic model. Based on the above findings, PEI-USAH could be used as a potential adsorbent for removal of Cr(VI) from wastewater.
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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分析化学
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水处理技术
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 28
·13800-13813
·
IF 4.682
Sun Menghui,Yan Cheng,Wu Yue,Li Mei,Chen Shiwei,Yang Zhizhou
A series of new hyper-cross-linked porous polymers (HCP-TTDs) were successfully prepared by the Friedel–Crafts alkylation reaction of 1, 1, 1-trimethyl-3, 3, 3-triphenyldisiloxane and formaldehyde dimethyl acetal (FDA). Nitrogen adsorption–desorption test showed that the BET specific surface areas of them were between 989 and 1285 m 2 g −1 . Furthermore, the prepared HCP-TTDs exhibited excellent adsorption capacities of organic dyes in aqueous solution (Malachite green: 2346 mg g −1 , Congo red: 2052 mg g −1 , and Rhodamine B: 1938 mg g −1 ). The adsorption behavior was well agreed with the pseudo-second-order model and Langmuir model. Additionally, the functionalization of HCP-TTDs could be realized by the condensation reaction of 3-(2-aminoethylamino)propyl-dimethoxymethylsilane (AAMD) and the alkali-treated porous polymer. The functionalized HCP-TTD displayed high adsorption performance for chromium ion, and the adsorption capacity was up to 76.9 mg g −1 , which is higher than many reported adsorbents. Therefore, HCP-TTDs are promising candidates for the removal of dyes and chromium ion from wastewater. Graphical abstract
研究领域:
材料科学
·
环境工程
·
化学
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DOI
高影响因子
ANNALS OF CLINICAL AND LABORATORY SCIENCE
·
2019
·Vol. 49
·期 2
·204-211
·
IF 0.96
Xue Xue,Hucheng Chen,Qingqing Xia,Ping He,Yuan Lv,Peng Liu,Yan Yang,Chaochao Wu,Qiang Gao,Jun Peng,Yang Yu,Feng Wang,Wei Qu,Zizheng Wang
Background The measurement of plasma catecholamines (CAs) including dopamine (DA), epinephrine (E), and norepinephrine (NE) and theirderivatives including metanephrine (MN), normetanephrine (NMN), vanillylmandelic acid (VMA), and homovanillic acid (HVA) hasbeen used in the diagnosis of pheochromocytoma and paraganglioma (PPGL) and primary hypertension (PH) but are typically detectedindividually when clinical testing. In this study, pre-column derivatization with dansyl chloride (DNS-Cl) combined with anultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) method was developed to simultaneously quantifyHVA, VMA, MN, NMN, DA, E, and NE in the plasma from patients with PPGL and PH. Methods Plasma samples were extracted by acetonitrile and derivatized with DNS-Cl, followed by reverse phase separation and triplequadruple detection. Quantification of the CAs and their derivatives in 10 PPGL, 10 PH, and 100 healthy subjects was performedby UPLC-MS/MS analysis. Results All the values of detected CAs/derivatives were in the linearity ranges of the fitted curves. The expression levels of theseven CAs in the PPGL and PH patients were significantly higher than the healthy controls, suggesting increased CA productionin the former. There were significant differences in plasma NE, NMN, and VMA levels between the PPGL and PH patients, butthere was no significant difference in plasma E, MN, DA, and HVA. A discriminant analysis showed that 90% of the final caseswere classified correctly based on the detected CAs/derivatives. Conclusions Our results show that the combined detection of the seven CAs/derivatives could be used for the clinical diagnosis of PPGLand PH.
研究领域:
临床化学
·
内分泌学
·
药理学
·
分析化学
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DOI
PubMed
高影响因子
JOURNAL OF ANALYTICAL CHEMISTRY
·
2025
·Vol. 80
·期 10
·1759-1770
·
IF 1.1
Sun Xiaofang,Song Jiawen,Zhang Chuanbin,Pan Youwen,Zhong Yi
Currently, most online monitors available on the market to detect the total chromium ( TCr ) in water mostly employ potassium permanganate or potassium persulfate oxidation-1,5-diphenylcarbazide ( DPC ) spectrophotometry. However, some problems still exist, such as the interference of residual oxidants with the determination, high temperature and time-consuming oxidation digestion reaction, high consumption of multiple chemical reagents, and complicated operation. Thereby, this study proposed a novel method combining ozone-based advanced oxidation processes with DPC spectrophotometry for the rapid and environmentally friendly determination of TCr in water. Based on a novel experimental device designed for the determination of TCr, the effects of reaction solution volume, pH, reaction time, ozone flow, and ultraviolet light intensity on the oxidation rate of TCr were investigated. Concurrently, the influence of the solvent of the chromogenic agent, chromogenic acidity, amount of chromogenic agent, and chromogenic time on the determination outcomes of TCr were also explored and optimized. Results revealed that under the optimized process conditions, within the concentration range of 0–1.25 mg/L, the proposed method manifested outstanding linearity ( R 2 = 0.9998), precision, indication error, method detection limit, and conversion rate were 1.14, 1.17%, 0.0007 mg/L, and 98.99%, respectively. This will be a promising and alternative method for routine analysis or online monitoring of TCr in water.
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Siraj Ahmad,Yuan Ye,Wang Zhi
Natural gas, known for its cleanliness and cost-effectiveness, is primed to become a key energy source for the future. However, the high N 2 content in many natural gas reservoirs presents a significant challenge, necessitating the development of advanced N 2 rejection technologies. N 2 -selective membranes provide a cost-effective solution for reducing CH 4 recompression in natural gas purification, although further improvements in N 2 /CH 4 separation efficiency are still required. This work investigates the separation capability of advanced mixed PI-matrix composite (MMC) membranes for selective nitrogen (N 2 ) removal from methane (CH 4 ). A polyimide/polyacrylonitrile (PI/PAN)-based thin-film composite (TFC) membrane was fabricated, exhibiting enhanced interfacial compatibility and modified crystallinity, leading to a more ordered polymer network with a reduced intersegmental spacing of 4.1 Å, in contrast to 5.8 Å observed in the pristine PI. PALS analysis confirmed that incorporating TYUT-96Cr nanoparticles optimally improved fractional free volume (FFV) while decreasing the PI-matrix accessible pore size to below 0.39 nm. This structural adjustment results in a sevenfold increase in annihilation intensity for smaller microcavities (I 3 > I 4 ), suggesting improved N 2 over CH 4 separation via enhanced molecular sieving and faster N 2 diffusion. At a pressure of 1.5 bar and a TYUT-96Cr loading of 30 wt%, the membrane displayed an N 2 permeance of 3.68 GPU and a N 2 /CH 4 selectivity of 63.78. Upon decreasing the selective layer thickness from 19 to 13 μm, the N 2 permeance increased to 12.47 GPU, however, the N 2 /CH 4 selectivity declined to 51.96. These findings significantly advance membrane gas separation, with strong implications for efficient natural gas purification.
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Xinlan Wang,Ri’an Fu,Xiong Wu,Huasheng Lai
Surface-enhanced Raman spectroscopy (SERS) often suffers from poor selectivity, sensitivity, and anti-interference capabilities in metallic ions detection. Herein, a redox-mediated SERS method is presented for on-site detecting Cr(VI) in complex samples with ultrahigh sensitivity (2.6 fmol/L), selectivity, and rapidity (within 5 min). 2-Mercaptoimidazole was selected as the SERS probe due to its strong SERS activity and the ability of its thiol group to reduce Cr(VI) to Cr(III). The redox reaction between Cr(VI) and thiol group of 2-mercaptoimidazole under acid condition was investigated, including pH, mixing ratio, temperature, and concentration. Remarkably, the reaction equilibrium was achieved within 1 min. Furthermore, the method exhibited high selectivity for Cr(VI) over other ions due to its strong oxidizing properties, and excellent anti-interference capabilities attributed to the robust sulfur-metal bond formation. The redox-mediated SERS method with ultrahigh sensitivity and a detection limit of 2.6 fmol/L, which is 12 orders of magnitude below the safety level (0.1 mg/L) set by United States Environmental Protection Agency for drinking water. Finally, the method was successfully applied to detect Cr(VI) residues in environmental water and traditional Chinese medicine drinking samples (Codonopsis pilosula and Astragalus membranaceus), achieving satisfactory recoveries (85.5–110%) and low RSDs (0.1–4.2%). This work not only advances the analytical performance for on-site detection of Cr(VI) residue but also offers a versatile tool with substantial implications for public safety monitoring and pharmaceutical quality control.
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高影响因子
ACS Omega
·
2025
·
IF 4.3
Qing’er Yao,Yuxiang Shen,Xiuxia Li,Jiangyue Bai,Yina Dong,Shiqi Xu,Chunpan Zhang,Zihang Wang,Xiaolu Xiong,Yanbo Yang,Junfeng Han
Hexavalent chromium ions in industrial wastewater can bring serious pollution to the environment and a variety of harms to human health. It is necessary to develop a novel technique to determine the heavy ions. In this work, we designed a special machine to enhance the production of microfluidic paper based analysis devices (μPADs, ∼1000 μPADs/h), which could be used to determine the industrial wastewater. We optimized the diphenyl carbamide solution and the volume of liquid to be tested. Finally, we established a fitting curve of the standard Cr concentration and color intensity from the μPADs. We carried out outside experiments in an industrial park, which needed a great amount of stable and repeatable devices for the test. In the concentration range of 250–600 mg/L, 74% of the measurement results had a relative error of less than 20%; in the concentration range of 50–250 mg/L, 72% of the measurement results had a relative error of less than 20%. Our results demonstrated that the accuracy and repeatability satisfied the requirements for wastewater detection, which could be extended to industrial application.
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产品关联
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
·
2023
·
IF 11.4
Zepeng Liu,Jie Zhang,Liping Zhang,Ying Guan,Hao Ji,Yu Zhang,Hui Gao
Biochar (BC) prepared from Medulla Tetrapanacis was recognized as having potential in environmental remediation because of its porous texture, abundant chemical surface groups and mineral composition. In this study, a novel modified biochar (KBC) derived from Medulla Tetrapanacis achieved efficient adsorption of Congo red (CR) and methylene blue (MB). Characterization results suggested that the modification had little effect on the group distribution of KBC, but a dramatic expansion of specific surface area was observed on KBC (1180.45 m 2 /g) compared to BC (198.51 m 2 /g). KBC exhibited a maximum sorption of 584.17 mg/g for CR and 318.01 mg/g for MB. Kinetic and isotherm studies revealed sorption of CR and MB by KBC was chemosorption, which occurred on the monolayer surface. The comprehensive analysis also provided the basis for the application of KBC to practical production. These outcomes suggested that KBC may become a new option for the effluent treatment.
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产品关联
DOI
PubMed
高影响因子
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