SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Shuyi Shen,Tao Ke,Dike Fang,Daohui Lin
Visible-light-driven photocatalysts with synergistic persulfate (PS) activation and photocatalysis possess enormous pollution-control potential. Herein, nitrogen and sulphur co-doped TiO 2 @C hybrid (N/S-TiO 2 @C) featuring the complementary visible-light photocatalysis and synergetic PS activation was synthesized by in situ oxidation of Ti 3 C 2 MXene and thereafter co-doping with N and S. Both anatase and rutile phases of TiO 2 were attained in N/S-TiO 2 @C. The decrease of TiO 2 bandgap (about 1.81 eV) and the defect of carbon layer caused by the N and S co-doping in both TiO 2 crystal and carbon layer enabled the synergistic enhancement of PS activation and photocatalysis. Complete degradation and 93.4% mineralization of sulfamethoxazole (SMZ, 10 mg/L) were achieved by dosing PS (2 mM) and N/S-TiO 2 @C (0.4 g/L) under visible light within 30 min. The degradation rate by N/S-TiO 2 @C through PS activation under visible light was 27.9-, 11.1-, and 2.30-fold higher than that by PS, N-TiO 2 @C, and S-TiO 2 @C alone, respectively. Reactive species SO 4 − , 1 O 2 , OH, and O 2 − , especially the former two, were determined dominating the SMZ degradation, and the degradation pathways were illustrated through intermediates identification. Moreover, N/S-TiO 2 @C kept excellent performance in activating PS to degrade SMZ in real water samples. These results indicate that N/S-TiO 2 @C is a stable and promising PS activator under visible light and has a good application potential in organic wastewater treatment.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Yongpeng Ma,Jianghui Du,Yifei Wu,Haobing Yan,Ruiqi Liu,Xiaojing Zhang,Hongzhong Zhang,Liming Zhou,Wenjun Huang
Among the diverse pollutants emitted from coal-fired and non-ferrous metal smelting flue gas, Hg 0 and CO have emerged as globally concerning environmental pollutants. However, the simultaneous abatement of multiple pollutants remains a critical challenge to be addressed. In this study, cobalt nanoclusters (Co NCs) were anchored on the terminal oxygen of Ti-O on Ti 3 C 2 MXene and formed asymmetric oxygen vacancies Co-Ov-Ti via a one-step hydrothermal method, yielding Co NCs/Ti 3 C 2 MXene with a morphology of hierarchical nanosheet-assembled spheres for Hg 0 and CO catalytic oxidation. Co NCs/Ti 3 C 2 MXene exhibited excellent 44 % and 52 % of Hg 0 and CO simultaneous removal efficiency at the optimal temperature of 250 °C, respectively. DFT calculations combined with energy barrier modeling were employed to investigate the reaction pathways and energy variations during the catalytic oxidation of Hg 0 and CO. Specifically, Hg 0 oxidation follows the Eley-Rideal mechanism, with a rate-determining energy barrier of 2.11 eV, while CO oxidation adheres to the Langmuir-Hinshelwood mechanism, featuring a rate-determining barrier of 0.17 eV. In the co-catalytic oxidation process, competitive adsorption between Hg 0 and CO was observed, primarily manifested as competition for Ov on the catalyst surface. This study provides a novel strategy for the synergistic control of multi-pollutants in industrial flue gas.
研究领域:
环境催化
·
材料科学
·
大气污染控制
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物理化学
·
纳米材料
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2022
·Vol. 414
·期 7
·2355-2362
·
IF 4.478
Zhao Xueqi,Zhang Yue,Wang Xinghua,Ma Pinyi,Song Daqian,Sun Ying
Long-range surface plasmon resonance (LRSPR) has demonstrated excellent performance in sensing and detection, due to its higher accuracy and sensitivity compared with conventional surface plasmon resonance (cSPR). In this work, we establish an LRSPR biosensor which employs PDA/Ti 3 C 2 -MXene/PDA-gold film as a sensing substrate and gold nanoparticles (AuNPs) as enhancers. Ti 3 C 2 -MXene is an emerging two-dimensional (2D) layered material which is used extensively in immunoassay and biosensing. The sensing substrate comprises two polydopamine (PDA) films between which is sandwiched a Ti 3 C 2 -MXene film based on a gold film, which provides a large surface area and abundant binding sites to rabbit anti-human IgG (Ab 1 ). Sandwich amplification is adopted to enhance the sensitivity of the LRSPR biosensor, and AuNPs/staphylococcal protein A (SPA)/mouse anti-human IgG (Ab 2 ) composites are introduced into the flow cell as enhancers after the immune binding of human IgG to Ab 1 . The antigen (human IgG) detection range is 0.075 μg mL −1 to 40 μg mL −1 , and the limit of detection is almost 20 times lower than that for cSPR biosensors. This novel LRSPR biosensor demonstrates excellent performance in immune sensing over a broad detection range and a low limit of detection. Subsequent modification of the LRSPR sensing platform could be made for extensive application in various biological detection fields. Graphical abstract
研究领域:
生物传感
·
分析化学
·
纳米技术
·
免疫学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2025
·
IF 6.6
Fang Li,Panpan Dong,Zijian Wu,Lu Xue,Mingming Luo,Yijun Tan,Haitao Li,Xu Yang
Aflatoxin B1 (AFB1) is a highly toxic mycotoxin and widely distributed in food matrixes, posing a serious threat to human health. In this work, a novel sensing platform based on liquid exfoliated graphene/Ti 3 C 2 MXene (LEG/Ti 3 C 2 MXene) nanocomposite was proposed to achieve ultrasensitive detection of trace AFB1 in response to the urgent issue, in which the LEG/Ti 3 C 2 MXene nanocomposites modified indium tin oxide (ITO) electrode acted as transducer, ferrocene (Fc) labeled aptamer (Fc-Apt) and methylene blue (MB) labeled complementary DNA (MB-cDNA) functioned as dual-signal probes, and the conformational change of hairpin-aptamer was regarded as signal “on-off” switch. The irregular Ti 3 C 2 MXene flakes interspersed between LEG sheets layer provided assistance in enhancing sensing performance, specifically, it not only effectively reduced the self-stacking and increased the specific surface area, but also provided multiple interlayer spacing to improve electron transfer efficiency. In the presence of AFB1, its competition with MB-cDNA led to the reappear of hairpin structure for Fc-Apt and the releasing of MB-cDNA, resulting in the removal of MB and fixing Fc close to the electrode surface. As a result, the peak current ratio of Fc to MB (I Fc to I MB ) would change accordingly, which served as the basis for qualitative analysis of AFB1. Under the optimal conditions, the constructed aptasensor exhibited excellent sensitivity with a wide linear range from 0.0001 to 100 ng/mL and a low limit of detection (LOD) of 0.041 pg/mL, as well as satisfactory selectivity, reproducibility, and stability, revealing its promising potential applications in food safety monitoring.
研究领域:
食品安全检测
·
生物传感
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Bing Liu,Xia Zhang,Jialong Chu,Fei Li,Caixia Jin,Jing Fan
Co-catalysts can achieve efficient separation of photogenerated carriers and are considered as a promising strategy for solar photocatalytic removal of pollutants. Herein, we reported the synthesis of nanocomposite of BiOIO 3 /Ti 3 C 2 MXene combining two dimensional 2D BiOIO 3 with 2D Ti 3 C 2 MXene co-catalyst. The few-layered 2D Ti 3 C 2 MXene provided more adsorption and reaction sites. Furthermore, the synergism of intimate interfacial contact between the two 2D nanosheets and robust metallic electrical conductivity of Ti 3 C 2 MXene significantly accelerated the separation and migration of photogenerated charge carriers. A variety of organic pollutants were proved to be effectively degraded by 2D/2D BiOIO 3 /Ti 3 C 2 MXene composites. The degradation efficiencies followed the order tetracycline hydrochloride (93.4 %) > diclofenac sodium (87.6 %) > levofloxacin hydrochloride (77.4 %) > 4-nitrophenol (43.3%). Besides, the satisfactory recycling and stability of BiOIO 3 /Ti 3 C 2 MXene for the degradation of organic pollutants in water under solar irradiation predicted its good prospect for practical applications.
研究领域:
材料科学
·
环境科学
·
纳米技术
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
Applied Materials Today
·
2020
·
IF 8.352
Xin Du,Tianyu Zhao,Ziyuan Xiu,Zipeng Xing,Zhenzi Li,Kai Pan,Shilin Yang,Wei Zhou
Novel BiVO 4 @ZnIn 2 S 4 /Ti 3 C 2 MXene quantum dots (QDs) assembly all-solid-state direct Z-scheme photocatalyst is fabricated via in-situ growth combined with two-step solvothermal strategy, which forms a hierarchical core-shell structure. The proper energy band structure of BiVO 4 and ZnIn 2 S 4 and the formation of a good solid-solid contact interface between them promote the construction of Z-scheme system, which achieves effective charge separation. It is surprisingly discovered that Ti 3 C 2 MXene QDs can be applied as cocatalysts for photocatalytic overall water splitting, which could accelerate the surface redox kinetics of the catalyst due to the unique properties of Ti 3 C 2 MXene QDs . In particular, due to its excellent metal conductivity, a Schottky barrier can be formed at the interface in contact with ZnIn 2 S 4 , further promoting charge separation. BiVO 4 @ZnIn 2 S 4 /Ti 3 C 2 MXene QDs achieves effective visible-light-driven pure water splitting into O 2 and H 2 evolution rates up to 50.83 and 102.67 μmol g −1 h −1 (~1:2). In addition, it also shows high photocatalytic degradation Bisphenol A efficiency of ~96.4 %. The high photocatalytic performance can be ascribed to the all-solid-state direct Z-scheme structure favoring spatial charge separation, Ti 3 C 2 MXene QDs as cocatalysts promoting proton reduction, and hierarchical core-shell structure offering more surface active sites. This work provides new insights to fabricate high-performance direct Z-scheme assembly system.
研究领域:
材料科学
·
光催化
·
能源化学
·
纳米材料
·
环境科学
·
半导体物理
·
表面科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Rui Zhou,Haoran Song,Daoyuan Zu,Shiting Pan,Yuwei Wang,Fangxian Wang,Zhuo Li,Yongming Shen,Changping Li
The self-floating Ti 3 C 2 MXene-coated polyurethane sponge (MXene@PU module) was prepared via the simple coating operation for thermal activation of peroxydisulfate (PDS) and production of clean water. Coating MXene on the surface of PU significantly improved the degradation of model pollutant carbamazepine (CBZ) compared with PU alone under simulated solar radiation. Because of the excellent photothermal conversion performance of Ti 3 C 2 MXene and the unique double-deck structure of MXene@PU module, the interfacial temperature of MXene@PU module reached about 140 °C, far higher than that of PU (about 82 °C). Radical identification experiments demonstrated that both hydroxyl radical and sulfate radical contributed to the degradation of organic pollutant. Addition of Cl − , HPO 4 2− , HCO 3 − and natural organic matter in solution generated inhibitory effect on CBZ degradation. The prepared MXene@PU module exhibited excellent stability after long-time experiment. Importantly, the interfacial evaporation process produced abundant recycled water and no pollutant was detected in recycled water. This study provides a feasible way to utilize the renewable solar energy for removal of organic pollutants and production of clean water.
研究领域:
环境科学
·
材料科学
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2023
·
IF 7
Linli Zhang,Hui Zhang,Hongling Zhou,Yi Tan,Zhengmin Zhang,Wei Yang,Lixing Zhao,Zhihe Zhao
Infected bone defect repair has long been a major challenge in orthopedic surgery. Apart from bacterial contamination, excessive generation of reactive oxygen species (ROS), and lack of osteogenesis ability also threaten the defect repair process. However, few strategies have been proposed to address these issues simultaneously. Herein, we designed and fabricated a near-infrared (NIR)-responsive, hierarchically porous scaffold to address these limitations in a synergetic manner. In this design, polymethyl methacrylate (PMMA) and polyethyleneimine (PEI) were used to fabricate the porous PMMA/PEI scaffolds via the anti-solvent vapor-induced phase separation (VIPS) process. Then, Ti3C2 MXenes were anchored on the scaffolds through the dopamine-assisted co-deposition process to obtain the PMMA/PEI/polydopamine (PDA)/MXene scaffolds. Under NIR laser irradiation, the scaffolds were able to kill bacteria through the direct contact-killing and synergetic photothermal effect of Ti3C2 MXenes and PDA. Moreover, MXenes and PDA also endowed the scaffolds with excellent ROS-scavenging capacity and satisfying osteogenesis ability. Our experimental results also confirmed that the PMMA/PEI/PDA/MXene scaffolds significantly promoted new bone formation in an infected mandibular defect model. We believe that our study provides new insights into the treatment of infected bone defects.
研究领域:
骨科手术
·
生物材料
·
组织工程
·
光热治疗
·
感染控制
·
骨再生
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 41
·33905-33915
·
IF 4.6
Fang Li,Panpan Dong,Zijian Wu,Lu Xue,Mingming Luo,Yijun Tan
As ubiquitous pollutants, heavy metal ions can accumulate in the food chain, increasing toxicity through synergistic effects and posing health risks to humans and other organisms. In this study, we successfully developed a dual-signal aptasensing interface for simultaneous detection of cadmium ions (Cd2+) and lead ions (Pb2+). The 2D layered Ti3C2 MXene and liquid exfoliated graphene (LEG) composite nanomaterials were employed as ITO electrode modification materials, which exhibited enhanced electrochemical properties. The Cd2+-specific aptamer labeled with Nile blue and Pb2+-specific aptamer labeled with ferrocene bind to their complementary strands immobilized on the electrode surface, resulting in a dual-signal interface. In the presence of target ions, the aptamers specifically recognized and captured the targets, subsequently detaching from the electrode surface, leading to changes in the dual-signals and thereby enabling simultaneous detection of Cd2+ and Pb2+. The limits of detection for Cd2+ and Pb2+ were determined to be 0.689 pM and 1.548 pM, with linear response ranges of 0.1 pM to 10 μM and 0.01 pM to 10 μM. The effectiveness of the proposed aptasensor in determining Cd2+ and Pb2+ simultaneously in water and vegetables has been demonstrated, providing substantial evidence for its potential application in food safety and environmental monitoring.
研究领域:
环境科学
·
分析化学
·
纳米材料
·
食品安全
·
传感器与生物传感器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Wenwen Li,Qi Fan,Chunxiao Chai,Yiran Chu,Jingcheng Hao
Wearable piezoresistive sensors have attracted tremendous attention recently, which can be applied for health monitoring and human-computer interaction. MXenes, possessing high metallic conductivity and large specific surface area, are often used as the conductive filler in hydrogels and organohydrogels for piezoresistive sensors. However, the environmental instability of MXene composites caused by the easy oxidation of MXene is a long-standing issue which needs to be solved urgently. Herein, taking advantage of phase transfer achieved by cationic surface active ionic liquid 1-vinyl-3-dodecylimidazolium bromide ([VC 12 Im]Br), we combine Ti 3 C 2 T x with hydrophobic ionic liquid to fabricate Ti 3 C 2 -MXene ionogel successfully, which exhibits high compressibility (2.97 MPa), high conductivity (0.908 mS/cm) and long-term stability (40 days). And the wearable piezoresistive sensor based on Ti 3 C 2 -MXene ionogel shows rapid response time (100 ms), high sensitivity (6.47 kPa −1 ) and wide detection range, thus can be used to monitor the tiny movements of human body parts, recognize vocalizations and handwriting. This preparation method develops a new path to fabricate Ti 3 C 2 -MXene ionogel with long-term stability and high sensitivity for wearable electronic devices.
研究领域:
材料科学
·
电子学
·
生物医学工程
·
可穿戴技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Langrun Song,Jun Nan,Bohan Liu,Fangmin Wu
Excessive phosphorus in water causes environmental security problems like eutrophication . Advanced two-dimensional material MXene has attracted raising attention in aquatic adsorption, while lack of selectivity and difficult recovery limit its application in phosphate removal . In this study, Ti 3 C 2 -MXene embedded zirconium-crosslinked SA (MX-ZrSA) beads were synthesized and their phosphate adsorption performance under different conditions was assessed. Investigations using SEM/EDS, XRD, BET, TGA and contact angle meter reveal that the addition of Ti 3 C 2 -MXene enhanced the thermal stability, mechanical strength, hydrophilicity, and formed loose network-like mesoporous inner structure with large surface area. The theoretical maximum adsorption capacity was 492.55 mg P/g and was well fitted by Freundlich and optimized Langmuir models. The Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy analysis showed that chemisorption was involved, and the formation of Zr–O–P and Ti–O–P complexes accounted for high selectivity and affinity to phosphate. The adsorption experiments in real waters and lab-scale continuous flow Anaerobic-Anoxic-Oxic reactor further indicated the application potential of MX-ZrSA beads. Our study will provide insight into MXene and SA aerogel synergistic adsorption of aquatic contaminants and help with the removal and recovery of finite phosphorus resource.
研究领域:
环境科学
·
材料科学
·
水处理
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Yajing Wang,Wennan Yan,Ji Zhang,Ziyi Li,Yingshu Guo
Starvation therapy mediated by glucose oxidase is a widely used therapeutic approach for tumor treatment, but it is limited by the simultaneous drawbacks of weak therapeutic efficacy, nonspecificity, and systemic toxicity. Thus, combination therapy was used to complement the widely used therapeutic strategy for anticancer therapy. On the basis of starvation therapy, we designed a catalytic model of nanosheets with biological cascade enzymes synergizing with anticancer drugs. In short, two cascade enzymes (glucose oxidase and horseradish peroxidase) are covalently immobilized on Ti3C2 MXene nanosheet and a cascade enzyme nanoreactor is formed by electrostatically adsorbing positive charged DOX. Finally, the outer layer is coated with hyaluronic acid. By combining glucose oxidase-mediated starvation therapy, photothermal therapy, and chemotherapy, we have achieved the therapeutic effect of “killing three birds with one stone” by combining the dual stimulation response of endogenous and exogenous sources to the tumor site. This method not only achieves the targeting of cancer cells but also improves the systemic toxicity and reduced efficacy of biological enzymes and realizes synergistic cancer therapy with enhanced cascade reactions. It opens up a new path for the research of nanomedicine.
研究领域:
纳米技术
·
癌症治疗
·
生物医学工程
·
药学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）