Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Siying Chen,Linfeng He,Jing Zou,Shiyi Yang,Lingxin Chen,Yingna Hou,Dongmei Xu,Zhongda Yan,Sheng Li,Jianying Wu
Peracetic acid (PAA) has garnered considerable interest due to its exceptional disinfection properties and strong oxidizing capabilities. However, the coexistent hydrogen peroxide (H 2 O 2 ) in the PAA solution, which has similar chemical characteristics with PAA, makes accurate measurement of PAA concentration challenging. In this study, a rapid, sensitive, and reliable spectrophotometric method for determining PAA was developed. The method involves the oxidation of N , N -diethyl- p -phenylenediamine (DPD) by Co(II)-catalyzed PAA, resulting in the formation of a stable pink DPD radical (DPD ●+ ). It is worth noting that Co(Ⅱ) is an excellent PAA catalyst but is inactive with H 2 O 2 . Consequently, there is minimal interference from the coexistent H 2 O 2 in the determination of PAA. The absorbance of DPD ●+ at 551 nm was well linear (R 2 > 0.999) with concentrations of PAA in the range of 0–80 μM under optimized reaction conditions, and the limit of detection was determined to be low as 0.175 μM. Furthermore, the proposed Co(II)-DPD spectrophotometric method demonstrates strong resistance to common natural water constituents (ferric ions, sulphate ions, nitrate ions, chloride ions, bicarbonate ions, and humic acid) and is suitable for the accurate determination of PAA in natural water sources like groundwater and surface water. Additionally, the proposed Co(II)-DPD spectrophotometric method was dependable for quantifying PAA concentrations and monitoring PAA changes in Co(II)/PAA, Cu(II)/PAA, Fe(II)/PAA, and hydroxylamine/Fe(II)/PAA processes. In conclusion, the proposed Co(II)-DPD spectrophotometric method can be utilized as an alternative method for the rapid and accurate determination of PAA in water.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2026
·
IF 6.5
Yan Zhao,Yanlong Xu,Anna Mei,Yingzhe Chen,Chee Sien Wong,Zhao Huang,Yulong Shan,Jianmeng Chen,Qian Li,Dong-Zhi Chen
A green HDES based on Bet and C 10 was synthesized for n -hexane capture. • Increasing C 10 ratio lowed viscosity and density, and increased free volume and hydrophobicity of Bet:C 10 HDES. • The optimized Bet:C 10 (1:16) HDES exhibits a partition coefficient ( K ) of 0.0046, outperforming silicone oil by 18%. • n -Hexane absorption is a spontaneous and enthalpy-driven physical process. • Bet:C 10 HDES demonstrates excellent reusability, retaining >99% capacity over 10 absorption-desorption cycles. n -Hexane is a hazardous hydrophobic volatile organic compound (VOC) posing significant neurotoxic and environmental risks. While liquid absorption is a standard elimination strategy, traditional solvents suffer from high volatility and energy-intensive regeneration. In this work, a novel class of hydrophobic deep eutectic solvents (HDESs) composed of natural betaine (Bet) and decanoic acid (C 10 ) was developed for efficient n -hexane capture. Physicochemical characterization manifested that Bet:C 10 HDESs are highly thermal stable, along with relatively low viscosity (17.5-37.6 mPa·s) and density (0.8979-0.9213 g/cm 3 ) at 30 °C, enabling them as suitable absorbents. Increasing C 10 ratio reduced the viscosity and density, enhanced the hydrophobicity and enlarged the molar free volume of Bet:C 10 HDESs. These physicochemical changes significantly improve affinity for n -hexane. Consequently, the optimized Bet:C 10 (1:16) HDES achieved a vapor-liquid partition coefficient ( K ) of 0.0046 at 30°C, demonstrating an absorption performance 18 % superior to traditional silicone oil. Thermodynamic analysis confirmed the absorption is a spontaneous, enthalpy-driven process ( ΔH < 0, ΔG < 0). 1 H NMR and ATR-FTIR spectra and Spearman correlation coefficients analyses confirmed that the interaction is governed by physical forces. Furthermore, the HDES exhibited outstanding reusability, retaining >99 % of its absorption capacity after 10 consecutive cycles. These findings establish Bet:C 10 HDESs as promising and green alternatives for industrial n -hexane capture. Download: Download high-res image (149KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.6
Zefan Liu,Xuejiao Rong,Jianchao Ma,Yin Xiao,Lin Shuo Jiang,Yang Li,Xilong Yan,Ligong Chen,Bowei Wang
The development of M-N-C catalysts (M = Fe, Co, Ni, etc.) was hindered by poor distribution of metal species and large particle size. In this work, alkaline additives were introduced during the precursor synthesis stage to regulate the distribution of metal components. Through hydrothermal and pyrolysis methods, Co-N-C catalysts (Co-N-C-NH3, Co-N-CO3, and Co-N-C-OH) were synthesized by using folic acid as the carbon and nitrogen source, cobalt chloride as metal salt, and ammonia solution, sodium carbonate solution, and sodium hydroxide solution as alkaline additives, respectively. The influence of different alkaline additives on the morphology, composition, and structure of Co-N-C catalysts was systematically analyzed through systematic characterization methods. The results indicated that the Co-N-CO3 catalyst prepared using sodium carbonate solution has a largest specific surface area, smallest and most evenly distributed Co nanoparticles. Moreover, the catalytic activity of the prepared Co-N-C catalyst in the hydrogenation of nitrobenzene was evaluated, and the influence of alkaline additives on its catalytic performance was further explored. Among them, the Co-N-CO3 catalyst achieved the best in the hydrogenation of nitrobenzene after reacting at 110 °C and under 1 MPa hydrogen for 3 hours, with a nitrobenzene conversion rate of over 99%. Comparative experiments confirmed that Co nanoparticles and Co-Nx sites constituted the active centers of the catalytic reaction. This strategy provides theoretical support and practical basis for optimizing the performance of Co-N-C catalyst.
✓ 已验证
DOI
高影响因子
ACS Catalysis
·
2026
·
IF 13.6
Zhaohui Chen,Weiping Yang,Yanmei Zheng,Siyu Yao,Yan Qing,Fan Dong,Markus Antonietti,Zupeng Chen
The direct photocatalytic conversion of alkylnitriles through C≡N bond cleavage to alkanes and alkenes is a model case for challenging triple bond activation and could expand the toolbox of chemistry. Herein, we report the visible-light-driven photochemical complete reduction of the C≡N bond of acetonitrile into ethene/ethane and ammonia using a composite photocatalyst consisting of Cd0.6Zn0.4S and ZIF-67. The optimal photocatalyst shows the highest C≡N bond cleavage efficiency, with a formation rate of 422.2/206.1 μmol g–1 h–1 for the final reduction product (ethene/ethane). This is 463/229 times that of pure Cd0.6Zn0.4S. Isotopic-labeling experiments and liquid in situ attenuated total reflection infrared absorption spectra (ATR-IRAS) results confirm the cleavage mechanism of the C≡N bond via the nitrile hydrogenation-nitrile breaking process. Integrated photoelectric characterization and density functional theory (DFT) calculations attribute the high performance to the facilitated charge separation and a reduced energy barrier for hydrogenation in the composite photocatalyst. This study not only presents an innovative approach for acetonitrile conversion under mild reaction conditions but also provides a promising example for breaking C≡N bonds for photocatalytic cleaning of organic nitrile wastes.
✓ 已验证
产品关联
DOI
高影响因子
WATER RESEARCH
·
2026
·
IF 12.8
Hongchao Li,Yi Yang,Guoyang Zhang,Zhichao Yang
Chlorination of N containing phosphonates affords ortho-P in 95.5% yield. • Electrophilic attack induces C N bond cleavage, followed by ortho-P release. • The chlorination process is applicable to metal-phosphonate complexes. • The chlorination process demonstrates highly selective and cost effective. N‑containing phosphonates are extensively utilized in industrial applications, primarily owing to their high chelating capacity towards metal ions. However, conventional degradation approaches for these compounds are frequently hampered by low treatment efficiency and high operational costs. In this work, we present chlorination as a simple yet robust strategy for the oxidative decomposition of various N‑containing phosphonates. Taking diethylenetriaminepenta(methylenephosphonic) acid (DTPMP) as a representative substrate, our experimental results reveal that chlorination achieves rapid and nearly quantitative conversion to orthophosphate, with an efficiency of 95.5% obtained within 5 min under the optimal pH of 7. Mechanistic investigations indicate that HClO, identified as the predominant reactive chlorine species, serves as an electrophile that preferentially targets the electron‑rich central N atom of DTPMP, thereby triggering C N bond scission and subsequent orthophosphate liberation. This inherent reactivity endows the chlorination system with remarkable tolerance to coexisting water constituents and enables satisfactory performance in real water matrices, thereby resulting in a lower operational expenditure compared with the UV/peroxydisulfate system. Furthermore, the chlorination process is capable of efficiently degrading transition metal-phosphonate complexes. This study offers a simple, energy‑saving, and cost‑effective alternative for the remediation of N‑containing phosphonate contamination in wastewater. Download: Download high-res image (189KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
Polymer Chemistry
·
2026
·
IF 3.9
Xiangyu Dang,Chongyu Zhu,Zhize Chen
The foreign body reaction (FBR) induced by the host immune system leads to fibrous encapsulation, which significantly impairs the functionality of implanted medical devices and can trigger complications. Zwitterionic polymers derived from trimethylamine N-oxide (TMAO) demonstrate particularly remarkable hydrophilicity and antifouling capabilities due to the direct connection between their positive and negative charges. In this study, based on the unique molecular structure of TMAO, a polysiloxane with TMAO and carbon–carbon double bonds as side chains was designed and synthesized. Subsequently, under the combined action of a photoinitiator and ultraviolet (UV) irradiation, a hydrogel with a Si–O–Si backbone was fabricated. In vitro tests demonstrated that the trimethylamine N-oxide-grafted silicone (TMAO-Si) hydrogel exhibits excellent resistance to protein adsorption and cell adhesion, while also exhibiting good biocompatibility. Building on these findings, we implanted the hydrogel in mice. The results indicated a significant reduction in the adhesion of inflammatory cells to the surface of the TMAO-Si hydrogel, with collagen fiber deposition thickness markedly lower than that observed in PEG hydrogels, thereby demonstrating superior anti-fibrotic encapsulation effects. Consequently, the TMAO-Si hydrogel shows promising potential as an implant material that minimizes interference from FBRs, offering a new technical approach for the development of long-lasting in vivo implant materials.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Guang Huang,Yuanhang Guo,Hong Lei Guo,Xiyue Tan,J. Paul Chen,Xiaohang Sun,Ping Zhang
A scalable design integrating hydrophobic association and multivalent electrostatics yields ultra-tough, highly stretchable polyelectrolyte hydrogels for p–n junctions. • Spontaneous assembly of oppositely charged hydrogels forms transparent p-n junctions with strong adhesion (∼ 700 N/m), high toughness (2.34 MJ/m 3 ), and co-deformability (>1000%). • The resulting hydrogel diodes exhibit stable ionic rectification under extreme deformation and enable stretchable full-wave rectifiers and deformable hydrogel batteries. • This cost-effective approach advances robust, biocompatible ionic electronics for next-generation wearable, soft-robotic, and energy applications. Flexible diodes for soft electronics remain challenging in that conventional inorganic semiconductors are mechanically fragile, and many organic/2D materials lost durability under large deformation, despite the need for efficient ion transport. Hydrogel-based alternatives offer tissue-like mechanics, biocompatibility, flexibility, and functional ionic conductivity, yet conventional polyelectrolyte hydrogels typically exhibit low toughness, and limited stretchability, particularly in p-n assemblies. Herein, we present a strategy of integrating hydrophobic association with multivalent counterion–mediated electrostatics to prepare high-toughness, stretchable polyelectrolyte hydrogels in both cationic and anionic formulations. Copolymerizing a hydrophobic comonomer and ionic monomers, followed by counterion incorporation, yields transparent, volume-contracted hydrogels with matched moduli and charge densities. Oppositely charged gels are assembled by simple contact to form p-n junctions, exhibiting strong interfacial adhesion (∼700 N m −1 ), high toughness (2.34 MJ m −3 ), and ultrahigh stretchability (>1000% elongation). These junctions co-deform, recover rapidly after cycling, and maintain stable ionic rectification under strains >1000%. Beyond single diodes, the same components enable stretchable full-wave rectifiers and deformable batteries. This scalable, cost-effective approach addresses key material limitations and advances polyelectrolyte hydrogel toward applications in wearable bioelectronics, soft robotics, and energy devices. Significance statement Flexible ionic circuits are essential for soft robots and wearable bioelectronics, but their “diodes” (p-n junctions) usually fail when stretched, bent, or twisted. We report a scalable strategy for designing ultra-tough, stretchable polyelectrolyte hydrogel p-n junctions that maintain stable ionic rectification under large mechanical deformation. The key is integrating hydrophobic association with multivalent counterion-mediated electrostatics to create gels with matched mechanical properties, strong interfacial adhesion, and co-deformability. This strategy overcomes long-standing challenges faced by conventional flexible diodes of loss of contact, interfacial delamination, and rectification collapse. These innovative junctions enable robust ionic components including stretchable full-wave rectifiers and deformable batteries, offering a practical route to mechanically robust ionic electronics for next-generation wearable bioelectronics, soft robotics, and energy-harvesting devices.
✓ 已验证
DOI
高影响因子
Artificial Cells Nanomedicine and Biotechnology
·
2017
·
IF 5.605
Yuchen Huang,Yi Zhang,Longbao Feng,Liumin He,Rui Guo,Wei Xue
When hydrophobically modified chitosan (HM-CHI) comes into contact with red blood cells (RBCs), it can cause agglomeration. This property leads HM-CHI to be a potential agent to form a rapid haemostatic plug to stop bleeding at wound sites. In this study, we investigated the properties of the HM-CHI biopolymer to act as an agent that rapidly clots blood. We have examined the synthesis and structural characteristics of HM-CHI – blood substances using X-ray diffraction, infrared spectroscopy and elemental analysis. To understand the rheological behaviour of RBCs within HM-CHI, we have studied the effects of HM-CHI on RBC aggregation and morphology using a rheometer and scanning electron microscopy (SEM), respectively. When mixed with sodium citrate, HM-CHI rapidly transformed human blood into an elastic gel. In contrast, un-modified chitosan (i.e. without hydrophobes) was unable to clot blood. The hydrophobias within HM-CHI entered into the RBC membranes and connected to the cells by a sample-spanning network, which subsequently led to the formation of an elastic gel. The gelling ability of HM-CHI is similar to that of fibrin-based sealants, but at a much lower cost and greater availability.
✓ 已验证
DOI
高影响因子
CELLULOSE
·
2013
·Vol. 20
·期 6
·3067-3077
·
IF 3.476
Zhang Bing,Jiao Yuchao,Kang Zhenzhen,Ma Kaikai,Ren Xuehong,Liang Jie
A novel N -halamine precursor with tertiary amino group (5,5-dimethylhydantoinyl-3-ylethyl)-dimethylamine (DEADH), was synthesized and then covalently bonded onto cotton fabrics modified by 3-chloropropyltrimethoxysilane to form quaternarized N -halamine precursor grafted cotton fabrics which could be transferred to N -halamine structure upon exposure to dilute sodium hypochlorite solution. The grafted cotton fabrics were characterized by FT-IR, X-ray photoelectron spectroscopy, and field emission scanning electron microscope. The antimicrobial test showed that the cotton fabrics grafted with the quaternarized N -halamine were capable of 7-log inactivation of Staphylococcus aureus and Escherichia coli O157:H7 within 1 min of contact time. Very interestingly, it was found that the grafting process and following chlorination had almost no adverse effect on the tensile strength of cotton fabrics. Furthermore, the antimicrobial cotton fabrics exhibited good washing durability and stability.
✓ 已验证
DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2018
·Vol. 28
·期 5
·2069-2079
·
IF 1.754
Wang Shuo,Zhang Zhaofu,Zhang Qihai,Li Lifang
Injectable and thermosensitive poly( N -isopropylacrylamide) (PNIPA)/nano-hydroxyapatite (nano-HA) composite hydrogels were synthesized by physical crosslinking of N -isopropylacrylamide with nano-HA as cross-linker to improve the mechanical property of hydrogels and avoid the use of chemical cross-linker. Internal morphology, thermosensitive, rheological, swelling, and hemocompatibility properties of the prepared hydrogels were investigated. The PNIPA/HA composite hydrogels had a phase transition from sol to gel, and the lowest critical solution temperature was about 32.5 °C. The PNIPA/HA composite hydrogels had regular pore structures and the nano-HA dispersed well throughout the network. Differential scanning calorimetry and thermogravimetric analysis showed that the addition of nano-HA had no significant effect on the LCST and thermal stability of the PNIPA/HA hydrogels. When the temperature was above 32.5 °C, the storage modulus ( G′ ) and complex viscosity increased with the increasing nano-HA content. All PNIPA/HA composite hydrogels possessed the thinning behavior. The PNIPA/HA hydrogels exhibited a good water absorption capacity and the swelling ratio decreased with the increasing nano-HA content. As revealed by biocompatibility results, PNIPA/HA composite hydrogels were considered to be a non-hemolytic biomaterial. Therefore, PNIPA/HA hydrogels can be used as injectable materials for the potential applications of science and technology, such as tissue engineering scaffolds.
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2015
·
IF 4.772
Jingzhong Zhao,Lei Zhang,Weiqiang Xing,Kathy Lu
B/N codoping is an effective way to narrow the band gap of TiO2 to enhance the photocatalytic activity. However, the traditional doping method using ammonia as N source is still unsatisfactory because of its safety risks and high cost. In this work, a benign and cost-effective method has been developed to prepare the B/N codoped TiO2. First, we use TiB2 as the raw material to prepare B-doped TiO2 via a hydrothermal method followed by heat treatment. Then the B/N codoped TiO2 can be simply produced by annealing the mixture of the as-prepared B-doped TiO2 and urea. X-ray diffraction (XRD) and scanning electron microscopy (SEM) results show that the samples present anatase structure and spherical morphology. X-ray photoelectron spectroscopy (XPS) analysis indicates that B and N atoms exist not only on the surface but also in the bulk. Moreover, the content of N atoms decreases with the depth in the sample while Ti3+ content gradually increases with the depth. The UV–vis absorption spectrum shows an extension of light absorption into the full visible region. More importantly, the B/N codoped TiO2 exhibits promoted photocatalytic activity under both UV and visible light than the B-doped TiO2.
研究领域:
材料科学
·
光催化
·
纳米材料
·
无机化学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2021
·
IF 2.694
Xiaopo Wang,Kai Wen,Xiaojie Wang
The liquid viscosity of n-hexadecane/ethyl octanoate mixtures was measured at the mole fraction of 0.25, 0.5, and 0.75. The measurements were performed at the temperatures from 298 to 361 K and pressures up to 30 MPa. A self-established viscosity system based on the falling cylinder method was used for the present measurements. After careful evaluation, for the present measurements, the combined expanded relative uncertainty of the viscosity was less than 0.04 with a 0.95 confidence. The viscosity values at each mole fraction were correlated by Andrade–Tait equation, and this equation can successfully describe the experimental data within their estimated uncertainties.
研究领域:
热力学
·
流体物理
·
化学工程
·
物理化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）