JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2024
·
IF 8
Shengjian Zhao,Hualong Yang,Xuehui Liu,Siqi Ma,Peigang He,Zhenlin Sun,Dechang Jia,Paolo Colombo,Yu Zhou
Metakaolin-based geopolymers are very promising materials for improving the safety of low and intermediate level radioactive waste disposal, with respect to ordinary Portland cement , due to their excellent immobilization performance for Cs + and superior chemical stability. However, their application is limited by the fact that the leaching behavior of Cs + is susceptible to the presence of other ions in the environment. Here, we propose a way to modify a geopolymer using perfluorodecyltriethoxysilane (PDFS), successfully reducing the leaching rate of Cs + in the presence of multiple competitive cations due to blocking the diffusion of water. The leachability index of the modified samples in deionized water and highly concentrated saline water reached 11.0 and 8.0, respectively. The reaction mechanism between PDFS and geopolymers was systematically investigated by characterizing the microstructure and chemical bonding of the material. This work provides a facile and successful approach to improve the immobilization of Cs ions by geopolymers in real complex environments, and it could be extended to further improve the reliability of geopolymers used in a range of applications.
研究领域:
材料科学
·
放射性废物管理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2025
·
IF 5.1
Xiaoyan He,Penggai Ma,Shuo Ma,Runze Cao,Jing Li,Yuanyuan Lu,Yanling Liang,Xin Tian,Zhiqiang Wang,Xiaoquan Lu
The rapid development of wearable sensors has indeed driven the demand for multifunctional conductive soft materials to new heights. However, conventional flexible strain sensors are difficult to adapt to complex environments due to poor mechanical properties, susceptibility to freezing deactivation at low temperatures and insufficient long-term stability. In this study, acrylamide (AAm), [2-(methacryloyloxy) ethyl] dimethyl (3-sulfopropyl) ammonium hydroxide (DMAPS), and octadecyl acrylate (SA) were copolymerized in a glycerol/water system by one-step photopolymerization and PEDOT: PSS was introduced to construct a super stretching antifreeze amphiphilic ion hydrogel (HADP). Its synergistic network, comprising hydrogen bonding, electrostatic interactions, and high entanglement, endows it with exceptional properties: a tensile strength of 230 kPa, a strain at break of 5295%, a fracture toughness of 64 MJ m-3, and the ability to retain 3344.5% strain and 194.73 kPa strength even after 7 days of storage at -20°C. Based on high sensitivity (GF=4.55), wide detection range (5-500% strain) and fast response of 0.19 s, the HADP can accurately monitor movements such as joint bending and swallowing and realize encrypted information transmission via Morse code. This study provides a paradigm of high-performance materials and multifunctional integrated design for wearable electronics in complex environments.
研究领域:
材料科学
·
生物医学工程
·
柔性电子
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
·
2020
·
IF 7.539
Sen Lin,Weiwei Huang,Hongjun Yang,Shuying Sun,Jianguo Yu
An oxidized biochar was prepared using long-root Eichhornia crassipes through an aerobic/anaerobic hybrid calcination to recycle its waste plants after eutrophic treatments. The adsorption performances of the biochar were investigated and the results showed that the adsorption equilibrium could arrive in 30 min and the adsorption capacities for Pb 2+ , Cu 2+ , Cd 2+ and Zn 2+ at 30 °C were 0.57, 0.41, 0.44 and 0.48 mmol/g, respectively. The adsorption could be promoted at higher pH and temperature and the adsorption tolerance for different heavy metal ions to the existence of competing ions and organic matters was hierarchical. The adsorption was deduced to be heterozygous courses and mainly controlled by complexation of oxygen-containing groups with these heavy metal ions. It was confirmed that the biochar could be regenerated with HCl solution and the adsorption performance kept consistent in 10 adsorption–desorption cycles.
研究领域:
环境科学
·
植物学
✓ 已验证
DOI
PubMed
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Meijie Liao,Lei Luo,Yingli Gao,Zhengkang Li,Pengfei Liu
SBS modified asphalt is widely used due to its excellent performance at both high and low temperatures, but its water resistance still needs improvement. To enhance its moisture damage resistance, this study modified SBS asphalt with three hydrophobic materials: polytetrafluoroethylene (PTFE), hydrophobic nano-SiO 2 , and trimethoxymethylsilane (MTMS). Viscosity tests, FTIR analysis, and the Langmuir water diffusion model were used to evaluate the modification effects. The results showed that all three hydrophobic materials effectively reduced viscosity changes of the asphalt in neutral rainwater, seawater, and acid rain.the hydrophobic modifiers significantly enhanced the stability and deformation resistance of SBS modified asphalt mixtures (by 57.7 %, 43.5 %, and 30.5 %) During water aging, asphalt undergoes saturated hydrocarbon degradation and unsaturated functional group oxidation, which is accelerated by acid rain and seawater. PTFE delayed asphalt degradation through crosslinking, while nano-SiO 2 and MTMS formed a Si-O-Si network, reducing water and oxygen diffusion, thereby improving water aging resistance. The hydrophobic modification significantly lowered the asphalt's water absorption and diffusion rate, preventing moisture from reaching the asphalt-aggregate interface. Aging-generated functional groups like carboxyl and ether groups intensified internal moisture diffusion, but the hydrophobic materials effectively delayed aging and prevented water penetration. This study reveals the modification mechanisms of hydrophobic materials in complex water environments, providing theoretical support for improving SBS asphalt's water damage resistance.
研究领域:
土木工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Shaochen Wang,Wen Si,Zhiguang Guo
With the advent of the information age, there is a growing demand for wearable sensing devices. Conventional hydrogels are a class of materials that can hold a large amount of water, with a three-dimensional network of hydrophilic polymerization chains inside. In remote areas or harsh environments, there is an urgent demand for a flexible sensor that is environmentally stable, wearable, and has high mechanical properties. Due to the hydrophilicity of the traditional hydrogel surface, it is easy to adsorb dust or be contaminated by liquid, which limits its further application. As a result, the superhydrophobic hydrogel F-PTD was designed using SiO 2 @PDA, F-HNT and PT hydrogel. TGA, XPS, SEM, EDS, FT-IR was used to characterize the structure of F-PTD, respectively. Based on the study of mussels, the adhesion property of polydopamine was utilized as an adhesion agent between organic–inorganic interfaces while improving the roughness of the hydrogel surface. The fabricated F-PTD superhydrophobic conductive hydrogels have excellent stretchability (Tensile Strain > 500 %), stable hydrophobicity (CA > 150°), and sensitive electrical conductivity (GF = 3.49). The contact angle of F-PTD is greater than 150° for tensile strains in the range of 0–350 %, and it maintains superhydrophobic under corrosive solutions with pH = 1–14. This enables F-PTD to perform the sensing function of detecting human body signals under complex environmental conditions, which has great potential for application in the field of underwater rescue, wearable electronics and human–computer interfaces.
研究领域:
材料科学
·
生物医学工程
·
传感技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2015
·
IF 2.353
Shuai Zhou,Ze-Quan Zhou,Xuan-Xuan Zhao,Yu-Hao Xiao,Gang Xi,Jin-Ting Liu,Bao-Xiang Zhao
We have developed a novel fluorescent chemosensor ( DAM ) based on dansyl and morpholine units for the detection of mercury ion with excellent selectivity and sensitivity. In the presence of Hg 2+ in a mixture solution of HEPES buffer (pH 7.5, 20 mM) and MeCN (2/8, v/v) at room temperature, the fluorescence of DAM was almost completely quenched from green to colorless with fast response time. Moreover, DAM also showed its excellent anti-interference capability even in the presence of large amount of interfering ions. It is worth noting that DAM could be used to detect Hg 2+ specifically in the Yellow River samples, which significantly implied the potential applications of DAM in the complicated environment samples.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jia Yang,Chenyu Li,Zhenyang Li,Zhiwen Liu,Wenjie He,Yue Xiao,Shuzheng Liu,Gang Qin,Aiguo Zhou,Qiang Chen
Recyclable methylcellulose (MC) gel-based versatile triboelectric nanogenerator (TENG) holds great potential in energy harvesting and multi-purpose sensing. However, forming difficulty, inverse thermoreversible sol–gel transition of MC, inferior electrical generation and sensing of TENG pose significant limitations on the widespread application of MC gel-based TENG in various complex environments. Herein, a novel sol–gel of MC and solvent replacement method is proposed to prepare MC/potassium hydroxide/glycerol (MKG) conductive gel with excellent strength, elongation and electrical conductivity based on hydrogen bonds and salting-out effect. To enhance interfacial contact, a simple glass template is used to fabricate MKG gel-based TENG with rough interface, which exhibits superior energy-harvesting capability and can power various electronic devices. As a versatile self-powered sensor, the TENG can monitor motion parameters of moving objects, human motions, as well as letter writing stably and sensitively. The power generation and self-powered sensing performances remain reliable and stable under complex conditions. Moreover, the prepared MKG gel can be recycled, and recycled MKG gel-based TENG that retains comparable electrical generation and multifunctional self-powered sensing to the original. This study provides new insights for designing high-performance inverse thermoreversible MC gel and versatile MC-based flexible electronics.
研究领域:
材料科学
·
能源技术
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Yuhui Liu,Alei Dang,Xin Liu,Yanying Han,Jiahe Chen,Amir Zada,Yiting Sun,Zeqi Yuan,Fa Luo,Tiehu Li,Tingkai Zhao
The main contribution of semiconductor nanomaterials to surface-enhanced Raman scattering (SERS) comes from charge transfer (CT) between the absorbing molecules and the semiconductor. However, it is still challenging to realize the combined effects of the electromagnetic mechanism (EM) and the chemical mechanism (CM) for semiconductor-based SERS substrates. Herein, we demonstrate and design double-shelled ZnO (ZnO-DS) hollow microspheres by a modified hydrothermal/solvothermal process. SERS experiments and theoretical simulations proved that the excellent SERS activity is mainly attributed to the combined effect of Mie resonances generated by the nanocavities in the unique hollow double-shell nanoparticles and the CT effect excited by special structure ZnO. Particularly, the produced ZnO-DS SERS substrates exhibited a low limit of detection (LOD, 1 × 10–7 M for 4-MPY), outstanding sensitivity (EF = 1.2 × 104), and high stability (RSD = 10.4%, over 30 days of storage at room temperature). Furthermore, benefiting from the matching of energy levels of the ZnO-DS substrate and probe molecules, the sulfhydryl molecules with similar structures could be selectively distinguished in complex environments. We visualize that this work will resolve the current dilemma between sensitivity and selective detection of SERS substrates and expect to enable the monitoring of target molecules in the environment containing complex mixtures such as food safety and environmental protection.
研究领域:
材料科学
·
纳米技术
·
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Hongyi Shu,Chuang Wang,Liu Yang,Dongcang Sun,Changtong Song,Xianhong Zhang,Dong Chen,Yuhong Ma,Wantai Yang
Nowadays, effluent treatment is a severe challenge mainly because of its complex composition, which includes oil, heavy metal ions, and dyes. Developing new intelligent membranes is one of the strategies to tackle these significant challenges in wastewater treatment . In this study, we fabricated asymmetric polyethylene glycol terephthalate (PET) membranes by grafting cross-linked poly (itaconic anhydride) (CL-PITA) nanoparticles onto the irradiated face. These nanoparticles were then functionalized with polyethyleneimine (PEI) and protonated with HCl to introduce numerous active electropositive amine groups. The fundamental purpose was to increase surface roughness, introduce numerous hydrophilic groups, and modify it to create a multi-functional PET membrane to separate complex environments. The promising results demonstrated that the protonated PET- g -ITA/DVB (10) -cat membrane exhibited excellent separation efficiencies (SE) for water/light oil, water/heavy oil and oil-in-water (O/W) emulsion. Compared to PET- g -ITA/DVB (0) -cat, it showed superior performance in SE for O/W emulsion and flux decay for water/light oil after 10 cycles. More interestingly, owing to numerous positively charged active amino groups and negativley charged carboxylate groups, the intelligent membrane exhibited a high removal rate of ca. 90 % for anionic dye (congo red) and heavy metals (Cu 2+ and Co 2+ ), showing great potential in complex water treatment environments.
研究领域:
环境科学
·
材料科学
·
水处理
·
膜技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）