SCIENCE OF THE TOTAL ENVIRONMENT
·
2017
·
IF 4.9
Sha Peng,Zheng Tang,Wei Jiang,Di Wu,Song Hong,Baoshan Xing
To decrease the power, material, and time consumption in wastewater treatment , a one-step process was performed to remove 2-chlorophenol (2-CP) from aqueous phase using zeolite and cetyltrimethylammonium bromide (CTAB). Compared with the traditional two-step process, the one-step process used in this study achieved almost eight times higher 2-CP adsorption capacity within a shorter time and maintained high removal efficiencies (around 65%) in reuse tests, thus becoming an efficient and economically acceptable alternative process. For the one-step process, the kinetic data fitted well with a nonlinear pseudo-second-order model, and the isotherm data fitted well with the Dubinin-Astakhov (DA) model. The uptake of 2-CP was highly dependent on pH, increasing in the pH range of 3–6. The enhanced 2-CP removal in a one-step adsorption process can be explained by the larger amount of surfactant loading (≥ 0.056 mmol/g), as determined from the total organic carbon (TOC) and zeta potential . Due to the formation of a loose CTAB bilayer, the hydrophobic partition and the interaction with the positively charged “head” of CTAB bilayers were decisive for the enhancement of pollutant adsorption. Therefore, organic pollutants could be removed from water alongside the synthesis of hydrophobic zeolite in a one-step process, which is a promising technology for the in-situ treatment of organic wastewater.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qingping Zhang,Yang Xu,Haiqing Hao,Zhongxiang Guan,Meng Wang,Zongyu Feng,Xiaowei Huang,Guang Yang,Chunmei Wang
Conventional advanced oxidation processes (AOPs) face technological bottlenecks in the stepwise treatment of heavy metal complexes (HMCs), and single-step removal strategies have attracted increasing attention. Herein, we pioneered a waste-derived strategy using NdFeB waste (NFBW) to activate H 2 O 2 for establishing a heterogeneous Fenton-like system, achieving concurrent Cu-EDTA decomplexation and Cu capture. Remarkably, 99.10 % Cu-EDTA decomplexation and 96.84 % total Cu capture were synchronously achieved within 30 min. This one-step technology is effective over a wide pH range (2.0–9.5). Notably, this system demonstrated practical efficacy in treating rare-earth purification wastewater, achieving synchronous removal of heavy metals (Cu, Zn) and rare-earth elements (Yb, Ce) as mixed organic complexes with effluent meeting industrial discharge standards. Mechanistic investigations revealed that Cu-EDTA decomplexation originated from Fe(Ⅲ)-induced ligand substitution coupled with reactive oxygen species (·OH and ·O 2 - ) attack. The ≡Fe(Ⅱ)/≡Fe(Ⅲ)-mediated heterogeneous Fenton reaction synergized with homogeneous Fe(Ⅱ)/Fe(Ⅲ) cycling to generate ROSs, where the B-B bonds and Fe 0 in NFBW facilitated electron transfer for enhanced redox cycling. Possible pathways for the decomplexation of Cu-EDTA in this system are proposed. The 90.10 % TOC removal verified EDTA mineralization through stepwise degradation pathways. Liberated Cu(Ⅱ) was captured via multiple routes: surface reduction (Cu 0 ), precipitation (Cu(OH) 2 , Cu 2 (OH) 2 CO 3 ), and Fe(OH) 3 adsorption-flocculation. This work not only opens new avenues for Fenton-like treatment of HMC wastewater through a “waste-treats-waste” strategy but also provides new ideas for synergistic activation of H 2 O 2 by multivalent iron materials.
研究领域:
环境科学
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废水处理
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Huansheng Liu,Hanhan Lv,Chihao Lu,Yi Zhang,Daniel K. Macharia,Zheng Tang,Zhigang Chen
Traditional photocatalysts are usually prepared in first-pot and then dried, and re-dispersed in the second-pot for photocatalytic H 2 generation, where the two-pot mode may lead to loss/underutilization of active sites. To maximize active sites, herein we propose in-situ synthesis and photocatalytic hydrogen (H 2 ) evolution in one-pot mode. NiS x -modified Cd x Zn 1-x S (NiS x -CZS) photocatalysts as a model are prepared by photochemical reactions of metal salt precursors in the presence of sulfur. Among NiS x -CZS photocatalysts, 2 wt% NiS x -CZS exhibits the strongest photoabsorption in the visible region and the highest photocurrent response, implying that it produces the most photoexcited electrons under visible light irradiation. When irradiated by visible light (≥ 420 nm), the in situ H 2 generation rate of optimized 2 wt% NiS x -CZS with higher concentration of active sites is 17.98 mmol g -1 h -1 (one-pot mode), which is better than the two-pot mode (15.08 mmol g -1 h -1 ). Besides, the presence of in situ attached NiS x co-catalyst on CZS host results in a 22.2-fold H 2 production rate compared to pristine CZS. H 2 production performance with NiS x co-catalyst (89.92 mmol g -1 ) within 5 h is also better than noble/transitional metals as co-catalysts (9.62-26.99 mmol g -1 ). The amorphous NiS x provide sufficient unsaturated edge sulfur (S) sites, which serve as active centers to capture and enrich H + and lead to the expedited H 2 generation through the effective combination of H ads atoms. This work provides a unique insight into the one-pot photochemical synthesis of photocatalysts with charge-accumulated active sites and a rational strategy for in situ hydrogen production.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 43
·e53050
·
IF 3.057
Lili Xing,Yirong Wang,Jin Cheng,Aijing Li,Jiali Gu,Xue Dong,Guoqiang Chen,Tieling Xing
With the rapid development of textile technology, single-function textile finishing is difficult to meet the current needs of people for textiles. Textiles with flame retardancy, superhydrophobicity, UV resistance, and other functions are increasingly favored by people. At present, most of the preparation processes of multifunctional textiles are complex and time-consuming. In this work, a flame retardant hexamethylenediamine tetramethylene phosphate ammonium salt of hexamethylenediamine - N, N, N′, N′ - tetra (methylphosphonic acid) (AHDTMPA) was synthesized using hexamethylenediamine tetramethylene phosphate (HDTMPA) and urea with aqueous solution as solvent. Then AHDTMPA and cetyltrimethoxysilane were added into the solution with methyl trimethoxysilane (MTMOS) and tetraethyl orthosilicate (TEOS) as precursors to obtain a multifunctional sol. Finally, the multifunctional cotton fabric can be obtained by immersing the cotton fabric in the multifunctional sol in one-step. The limiting oxygen index (LOI) and water contact angle (WCA) value of the finished cotton fabric was 27.6% and 131.4°, respectively. The FT-IR characterization results and the SEM analysis verified the synthesis of AHDTMPA. The micro calorimeter combustion (MCC) and thermo gravimetric (TG) analysis indicated that the finished samples had less heat release capacity and less weight loss. The smoke density test showed good smoke suppression of the finished cotton fabric. Moreover, the whiteness of finished samples was nearly unchanged. In this work, the flame retardant and hydrophobic multi-functional cotton fabric was prepared by one-step, and the method is simple and efficient. The prepared functional cotton fabrics can be widely used in home textile fabrics, automotive interior fabrics, clothing fabrics, flags, tents, and protective clothing.
研究领域:
纺织科学
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材料化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Siyuan Jin,Zhou Jie,Ruizhi Wu,Xiaochun Ma,Zhe Yu,Wang Guixiang,Jinghuai Zhang,Boris Krit,Sergey Betsofen,Neshchimenko Vitalii,Buzikov Ruslan,Min Qiu,Yurong Yang,Jiaming Chen
An in-situ grown LDH/ZIF-8 hybrid film on the surface of MAO film based on the LA93 alloy was successfully fabricated by the one-step method. The composite film, called as MLZ, demonstrates exceptional corrosion resistance. The corrosion current density is reduced by two orders of magnitude compared to the MAO film. Furthermore, it possesses significant long-term protective capabilities. Experimental measurement and density functional theory (DFT) calculations were conducted to investigate the formation mechanism of MLZ composite film. During the hydrothermal, Zn ions from the in-situ generated LDH on the MAO surface serves as active nucleation sites, facilitating the nucleation and growth of ZIF-8 crystals. The formation of ZIF-8 effectively compensates for the intergranular defects in LDH, enhancing the integrity of the film. LDH/ZIF-8 film effectively seals defects in the MAO film and constructs a robust physical barrier, significantly enhancing the protective capacity of the film.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
Energies
·
2017
·Vol. 10
·期 9
·1296
·
IF 2.262
Yizhi Yan,Haolin Tang,Fan Wu,Rui Wang,Mu Pan
A cocoon-like α-Fe2O3nanocomposite with a novel carbon-coated structure was synthesized via a simple one-step hydrothermal self-assembly method and employed as supercapacitor electrode material. It was observed from electrochemical measurements that the obtained α-Fe2O3@C electrode showed a good specific capacitance (406.9 Fg−1at 0.5 Ag−1) and excellent cycling stability, with 90.7% specific capacitance retained after 2000 cycles at high current density of 10 Ag−1. These impressive results, presented here, demonstrated that α-Fe2O3@C could be a promising alternative material for application in high energy density storage.Keywords:one-step;self-assembly;α-Fe2O3;carbon coating;supercapacitors
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2025
·
IF 12.4
Haifeng Mai,Xinqi Liang,Baoyi Zhang,Weijuan Huang
Emulsion gels are typically prepared via a two-step process involving emulsification followed by gelation. However, this approach is complex, as emulsion droplets may aggregate before gelation, and harsh gelation conditions may disrupt the emulsion structure and degrade encapsulated bioactive components. Recently, one-step methods have emerged, particularly under high oil content or by inducing a transition from emulsion to gel. In this study, we propose a facile one-step method to prepare uniform and stable low-oil emulsion gels. A carboxymethyl chitosan (CMC) solution and an oil phase containing cinnamon essential oil (CEO) were homogenized using a high-speed disperser at 10,000 rpm for 2 min under 23 °C, inducing a transition from solution to gel. Schiff base reactions between the amino groups of CMC and the aldehyde groups of cinnamaldehyde occurred simultaneously at the oil-water interface and in the aqueous phase, enabling concurrent emulsification and gelation. Increasing CMC concentration (1–2 wt%) and CEO content significantly reduced droplet size, accelerated gelation, and improved structural uniformity. Confocal laser scanning microscopy (CLSM) and cryo-scanning electron microscopy (cryo-SEM) analyses revealed that higher CMC concentrations promote denser gel networks, while increased CEO concentrations yield smaller and more uniformly dispersed oil droplets. Stability assessments demonstrated that emulsion gels prepared with 2 wt% CMC exhibited superior storage stability, freeze-thaw resistance, and centrifugal stability. This facile one-step method for preparing low-oil emulsion gels holds promise for applications in low-fat substitutions development and the encapsulation of sensitive bioactive compounds.
研究领域:
食品科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Han Jiang,Bin Guan,Xuesong Peng,Reggie Zhan,He Lin,Zhen Huang
This study focuses on investigating the influence of ion-exchange method (ION-F and ION-A) and one-pot method (ONE-F and ONE-A) on catalytic properties and hydrothermal stability of Cu/SSZ-13. It was found that ONE-F catalyst showed better SCR activity, especially at low temperature range below 400 °C. After hydrothermal aging, ION-A exhibited higher low temperature efficiency than ONE-A. The effect of synthesis method on the physicochemical structure, acidity intensity, and Cu species migration or transformation of the fresh and aged Cu/SSZ-13 catalysts were comprehensively characterized by NH 3 -TPO, H 2 -TPR, NH 3 -TPD, ICP, XRF, BET, XRD, SEM, and TEM. ONE-F has more isolated Cu 2+ sites, higher ratio of active sites Cu 2+ -2Z/[Cu(OH)] + -Z, more Lewis acid sites, and smaller particle size than ION-F. However, hydrothermal aging had severe effect on Cu/SSZ-13 prepared by one-pot method, leading to particle aggregation and decrease of active copper sites. According to NH 3 -SCR kinetic studies, smaller particle size and more uniformly distributed active sites over ONE-F resulted in less effect of pore diffusion limitation. Furthermore, in situ DRIFTS results indicated that more monodentate nitrates adsorbed sites and Lewis acid sites existed in ONE-F. On the other hand, monodentate nitrates were identified to be the most active nitrate species, and Lewis acid sites were ascertained to be more active than Brønsted acid sites. Therefore, ONE-F showed more excellent SCR performance than ION-F. However, hydrothermal aging resulted in loss of majority of nitrate adsorbed sites and acid sites over catalyst prepared by one-pot method, leading to lower SCR performance. In conclusion, Cu/SSZ-13 prepared by ion-exchange method has higher hydrothermal stability, however, fresh Cu/SSZ-13 prepared by one-pot method has excellent catalytic properties.
研究领域:
催化材料
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2023
·Vol. 30
·期 4
·756-765
·
IF 4.8
Liu Yunsong,Wang Enhui,Xu Linchao,Yang Tao,He Zhijun,Liang Tongxiang,Hou Xinmei
Different amounts of AlON have been introduced in calcium hexaaluminate (CA 6 ) using two approaches, that is, one-step and two-step methods, to improve the slag resistance of CA 6 . A one-step method can directly sinter the mixtures combining Al 2 O 3 , CaCO 3 , and Al in flowing nitrogen, in which AlON clusters are always formed because of the poor wettability of Al by Al 2 O 3 , leading to the high porosity of CA 6 /AlON composite. In a two-step method, CA 6 and AlON are prepared separately and then mixed and sintered in flowing nitrogen. Compared with the sample prepared by the one-step method, CA 6 and AlON in composite by the two-step method are more uniformly distributed, and the optimized amount of AlON added is 10wt%. The slag corrosion and penetration test shows that the CA 6 /AlON composite using the two-step method exhibits superior slag corrosion protection. The promoted effect of AlON on slag penetration and corrosion resistance is also discussed.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
ORGANIC PROCESS RESEARCH & DEVELOPMENT
·
2024
·
IF 3.1
Yuan Li,Chun You,Yi-Heng P. Job Zhang
d-Glucaric acid (GA), one of the polyhydroxy dicarboxylic acids, is known for its great potentials in the polymer, food, detergent, and pharmaceutical industries. Here, we presented a highly efficient synthesis of GA from starch by in vitro biotransformation (ivBT). This one-pot ivBT was composed of five thermophilic enzymes (i.e., isoamylase, α-glucan phosphorylase, phosphoglucomutase, inositol 1-phosphate synthase, and inositol monophosphatase) responsible for the synthesis of myo-inositol (MI) from starch, followed by three mesophilic enzymes (i.e., myo-inositol oxygenase (MIOX), uronate dehydrogenase (UDH), and H2O-forming NADH oxidase (NOX)) responsible for the synthesis of GA from inositol. Also, a stepwise-added enzyme cocktail strategy was employed to circumvent the inhibition of GA on MIOX and mismatches in enzymes’ properties, such as temperature and pH. The three-step cascade bioprocessing in one pot resulted in the concentration of disodium glucarate of approximately 9.66 g/L (i.e., 38 mM) from 10 g/L maltodextrin with an atom efficiency of 96.6%. Up to 52.1 g/L disodium d-glucarate, the highest titer reported, was produced in a stirred bioreactor operated in two-reaction temperature ranges, featured with the stepwise addition of enzyme cocktails, and equipped with a constant pH controller and stirring for enough oxygen supplies. This study could open a new door to the industrial biomanufacturing of GA by ivBT.
研究领域:
生物化学
·
工业生物技术
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2012
·
IF 4.186
Yu Wang,Aiwei Tang,Kai Li,Chunhe Yang,Miao Wang,Haihang Ye,Yanbing Hou,Feng Teng
A one-step colloidal process was adopted to prepare face-centered-cubic PbS nanocrystals with different shapes such as octahedral, starlike, cubic, truncated octahedral, and truncated cubic. The features of this approach avoid the presynthesis of any organometallic precursor and the injection of a toxic phosphine agent. A layered intermediate compound (lead thiolate) forms in the initial stage of the reaction, which effectively acts as the precursor to decompose into the PbS nanocrystals. The size and shape of the PbS nanocrystals can be easily controlled by varying the reaction time, the reactant concentrations, the reaction temperatures, and the amount of surfactants. In particular, additional surfactants other than dodecanethiol, such as oleylamine, oleic acid, and octadecene, play an important role in the shape control of the products. The possible formation mechanism for the PbS nanocrystals with various shapes is presented on the basis of the different growth directions of the nanocrystals with the assistance of the different surfactants. This method provides a facile, low-cost, highly reproducible process for the synthesis of PbS nanocrystals that may have potential applications in the fabrication of photovoltaic devices and photodetectors.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
SUPERLATTICES AND MICROSTRUCTURES
·
2013
·
IF 1.564
Zhaoxia Han,Dawei Zhang,Daohua Zhang,Ruijin Hong,Qinmiao Chen,Chunxian Tao,Yuanshen Huang,Zhengji Ni,Songlin Zhuang
Highly dispersed and near stoichiometric chalcopyrite CuInSe 2 nanoparticles were successfully synthesized via a facile and rapid one-pot method. For understanding the reaction pathway, the solid intermediates obtained at different stages of CuInSe 2 nanoparticles synthesis process were investigated in detail by powder X-ray diffraction (XRD), X-ray photoelectron spectrometer (XPS), energy dispersive spectroscopy (EDS) and Raman spectroscopy . The XRD patterns showed that the phase formation sequence was CuSe → CuInSe 2 . The XPS results indicated that the valences of Cu and Se in CuSe were +1 and −1, respectively. The chemical composition of the solid intermediates revealed the presence of the solid-state In–Se secondary phases in the synthesis process. However, no XRD signals or Raman signals of the solid-state In–Se secondary phase were observed. Based on the experimental results, the possible reaction pathway was proposed.
研究领域:
材料科学
·
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）