JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2022
·
IF 8.91
Chengze Yu,Jiaqi Hou,Bin Zhang,Shiqi Liu,Xiangrui Pan,Heng Song,Xiangting Hou,Qinghua Yan,Chengzhi Zhou,Guocheng Liu,Yingjie Zhang,Yanjun Xin
The dual-chamber photoelectrocatalytic (PEC) system possess advantages in the degradation efficiency and processing cost of organic contaminants . In this study, TiO 2 nanotube arrays modified by rGO and g-C 3 N 4 (rGO/g-C 3 N 4 /TNAs) photoelectrodes were successfully prepared. The surface micromorphology , chemical structure, crystal structure, and basic element composition of rGO/g-C 3 N 4 /TNAs photoelectrodes were studied by SEM , FTIR, XRD , Raman, and XPS . UV–vis absorption, photoluminescence (PL) spectra, and photoelectrochemical (PECH) tests were used to explore the photoelectrochemical characteristics of rGO/g-C 3 N 4 /TNAs photoelectrodes. Under simulated sunlight illumination, the dual-chamber PEC system with external bias voltage was used to investigate the degradation of oxytetracycline (OTC) on rGO/g-C 3 N 4 /TNAs photoelectrodes. The results showed that rGO and g-C 3 N 4 were successfully loaded on TNAs, and the separation efficiency of electrons and holes at rGO/g-C 3 N 4 /TNAs photoelectrodes was improved. The light absorption range of rGO/g-C 3 N 4 /TNAs photoelectrodes extends to the visible light region and has better light absorption performance. Compared with the photocatalytic process, when 1.2 V bias voltage was applied, the degradation efficiency of OTC in anode and cathode chambers in PEC were increased by 3.28% and 44.01% within 60 min, respectively. In addition, the anode and cathode chambers have different degradation effects on OTC. Both the external bias voltage and initial pH have significant effects in cathode chamber, but have little effect in photoanode chamber. The fluorescence excitation-emission matrix spectra and liquid chromatography-tandem mass spectrometry showed that there were different intermediates in the degradation process of OTC. This study indicated that for the dual-chamber PEC system, rGO/g-C 3 N 4 /TNAs photoelectrodes exhibited excellent photocatalytic performance and have potential application prospects in water environmental remediation.
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PubMed
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Zhimin Yang,Zefeng Wei,Yunpeng Xing,Liang Zhao,Yaqing Zhang,Congcong Xin,Teng Fei,Sen Liu,Tong Zhang
The development of room-temperature chemiresistive gas sensors with low limit of detection, high sensitivity, and selectivity for dimethyl methylphosphonate (DMMP) detection remains a challenge. Herein, a synergy of the two intermolecular hydrogen bond-promoted approach was proposed to fabricate a room-temperature DMMP sensor with enhanced performances. As a proof of concept, ternary p-hexafluoroisopropanol phenyl (HFIP) functionalized polypyrrole-reduced graphene oxide hybrids (HFIP-PPy-rGO) were rationally designed. During the sensing process, rGO serves as a conductive carrier, ensuring that the sensors operate at room temperature, and both HFIP and PPy act as adsorption sites for DMMP through hydrogen bonding interactions. As expected, the HFIP-PPy-rGO sensor exhibits high selectivity and sensitivity to DMMP. Besides, the HFIP-PPy-rGO sensor also possesses excellent linear response to DMMP and long-term stability. Experimental results and quartz crystal microbalance measurements prove that the specific recognition of DMMP is realized by forming two intermolecular hydrogen bonds between HFIP and DMMP, as well as PPy and DMMP. Additionally, the introduction of HFIP groups also contributes to adjusting device conductivity, enhancing signal conversion function. To put the DMMP sensor into potential practical application, the obvious sensing response to different DMMP concentrations in soil was confirmed, and a wireless detection system was built to realize real-time monitoring of DMMP concentrations in the surroundings. Overall, this study provides a facile and practical solution for improving the sensing performance of room-temperature sensors based on the hydrogen bond theory.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2023
·
IF 6.2
Yanping Zhao,Xu Geng,Xiaoling Zhou,Li Xu,Shuai Li,Zhengqiang Li,Yi Guo,Chen Li
Pyruvate participates in diverse metabolic pathways in the body and is normally present in human blood at 40–120 μM, with concentrations outside this range associated with various diseases. Therefore, accurate and stable blood pyruvate level tests are necessary for effective disease detection. However, traditional analytical techniques require complicated instrumentation and are time consuming and expensive, prompting researchers to develop improved methods based on biosensors and bioassays. Here, we designed a highly stable bioelectrochemical pyruvate sensor affixed to a glassy carbon electrode (GCE). To maximize biosensor stability, 0.1 U of lactate dehydrogenase was affixed to the GCE using a sol-gel process, resulting in generation of Gel/LDH/GCE. Next, 2.0 mg/mL AuNPs-rGO was added to enhance current signal strength, resulting in generation of the bioelectrochemical sensor Gel/AuNPs-rGO/LDH/GCE. AuNPs-rGO synthesized in advance was verified as correct using transmission electron microscopy and UV–Vis, Fourier-transform infrared and X-ray photoelectron spectroscopy. Pyruvate detection conducted via differential pulse voltammetry in phosphate buffer (pH 7.4, 100 mM) at 37 °C for 1–4500 μM pyruvate provided detection sensitivity as high as 254.54 μA/mM/cm 2 . The reproducibility, regenerability and storage stability were analyzed with the relative standard deviation of 5 bioeletrochemical sensors detection was 4.60% and biosensor accuracy after 9 cycles was 92%, with accuracy remaining at 86% after 7 days. In the presence of D-glucose, citric acid , dopamine, uric acid and ascorbic acid , the Gel/AuNPs-rGO/LDH/GCE sensor exhibited excellent stability, high anti-interference ability and better performance than conventional spectroscopic methods for detection of pyruvate in artificial serum.
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高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Chenguang Kong,Xiaobin Li,Ending Zhang,Jun Shi,Jianrong Ren,Cunzhi Li,Hangzhou Wang,Kun Wu
Wearable sensors are the development trend in the future iteration of medical devices , in which, flexible temperature sensors with high resolution, fast response speed, and good reliability under deformations, are one of the much important devices. In this study, a nano multilayer sensing structured fiber temperature sensor is fabricated via in situ coating reduced graphene oxide (rGO) and chitosan (CS) on the surface of stretchable polyurethane fiber (PF) by a layer-by-layer self-assembly method. The introduction of CS not only enhances the temperature sensitivity (with a temperature coefficient of −1.379 %‧°C −1 in the range of 30–60 °C) of the rGO-based fiber sensors but also greatly increases the mechanical stability of the nanofibrous membrane. Most importantly, the fiber-shaped temperature sensor shows a fast response time (2.4 s) and recovery time (3.9 s) to temperature. Moreover, the sensor achieves a high temperature resolution of 0.1 °C. Made from a simple and low-cost process, the fiber-like devices can be easily integrated into items such as gloves or face masks to monitor the real-time temperature changes. The results demonstrate the great potential of rGO-based fiber sensors for applications in human healthcare monitoring.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Zhiyan Liu,Na Tian,Zhongyu Zhang,Nengneng Li,Yulun Nie,Xike Tian,Chu Dai
The nano zero-valent iron (nZVI)/peroxymonosulfate (PMS)-based advanced oxidation processes (AOPs) are promising for removal of antibiotic contaminants in groundwater. However, the inherent defects of rapid passivation and inactivation limit the efficient and steady application of nZVI. Herein, the lanthanum@nZVI/rGO (La@nZVI/rGO) was synthesized in which nZVI was coated with La and distributed evenly on reduced graphene oxide (rGO) matrix. The introduction of La coating protected the nZVI from direct contact with PMS molecules thus the La@nZVI/rGO appeared efficient and steady activization of PMS to degrade ofloxacin (OFX) without rapid inactivation. The removal rate was promoted to 96.5 % compared with the uncoated nZVI/rGO (only 85.2 %). The degradation reaction represented steady and continuous activation of PMS with pseudo-first-order kinetics (0.0451 min −1 ). While the two-stage kinetics of nZVI/rGO/PMS with initial 0.2581 min −1 and instant 0.0024 min −1 resulted from the rapid inactivation of nZVI. The reaction of La@nZVI/rGO/PMS exhibited minimal leaching of Fe ions (less than 1.8 µg/L) while it reached 6.4 mg/L in nZVI/rGO/PMS. XRD and XPS analyses further demonstrated the excellent durability of La@nZVI/rGO and the obvious passivation of nZVI/rGO. ESR and quenching tests confirmed that La coating regulated the PMS activation and ROS generation mechanism. The degradation was dominated by 1 O 2 -induced non-free radical process in La@nZVI/rGO/PMS system and different from radical oxidation in nZVI/rGO/PMS. Moreover, the dissolved oxygen and XPS analysis revealed the important role of La coating and oxygen vacancy in the catalytic degradation. This work could provide a novel understanding of the nZVI with protective coating in AOPs environmental remediation.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Wenhua Li,Shule Zhang,Qianqiao Chen,Qin Zhong
Hierarchical nanostructures with tailored components and architectures have attracted widespread interest in improving the performance of electrocatalysts, but the construction of exquisite structures with remarkable electrocatalytic performance is still challenging. Herein, the hierarchical CoS 2 /NC-RGO composite is designed via a delicate yet facile three-step process, including in-situ growth of ZIF-67, carbonization, and vulcanization. The key preparation step is that GO sheets and the O-20 surfactant are introduced simultaneously into the process of ZIF-67 preparation to obtain the precursor of the hierarchical structure. The composite employed as the counter electrode in the polysulfide electrolyte exhibits a low charge transfer resistance of 1.07 Ω, and the CdS/CdSe co-sensitized quantum dot sensitized solar cell obtains a PCE up to 5.14%. The successive cyclic voltammetry test results prove that it exhibits ultrastrong durability in the polysulfide electrolyte. The excellent performance is mainly due to the well-design of the RGO conductive skeleton and the CS/NC nanoparticles that are uniformly and tightly anchored on the RGO surface. This work provides a new perspective for the preparation of novel and high-efficient hierarchical carbonaceous composite CEs for QDSSCs.
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高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Shengzhong Rong,Lina Zou,Ye Zhu,Ze Zhang,Hongfeng Liu,Yingcong Zhang,Hui Zhang,Hongmin Gao,Hongjun Guan,Jing Dong,Yupeng Guo,Fenghai Liu,Xiaoxia Li,Hongzhi Pan,Dong Chang
Nuclear matrix protein 22 (NMP22) is a crucial bladder cancer marker, the accurate detection of which is conductive to improving the effectiveness of tumor prevention and treatment. However, due to low sensitivity, it is impossible for conventional immunoassay to detect the trace of NMP22 at the early stages of tumor progression. It is crucial to develop a simple, sensitive and accurate detection method of NMP22. As a variety of two-dimensional (2D) material, reduced graphene oxide-tetraethylene pentamine (rGO-TEPA) demonstrates excellent conductivity and contains abundant amino groups. As a sort of 3D material, silica-modified Cu-based metalorganic frameworks deposited silver nanoparticles ( [email protected] 2 @AgNPs) composites are characterized by large surface area, excellent biocompatibility and water stability, which allows the immobilization of anti-NMP22 in large amounts via Ag-N bonds. Through a combination of the advantages exhibited by 2D material, 3D material, AgNPs and disposable screen-printed electrode, a disposable and sensitive label-free electrochemical immunosensor has been successfully assembled for NMP22 detection. In addition to exhibiting a wide linear range (0.1 pg∙mL −1 -1000 ng∙mL −1 ) and a low detection limit (33.33 fg∙mL −1 , S/N = 3), the proposed immunosensor also demonstrated satisfactory selectivity, strong reproducibility and high stability. Moreover, the excellent performance in detecting human urine samples makes it applicable in practice.
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高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Hong Xiao,Tengfei Zhang,Xiao Liang,Qiuming Gao
HSN-rGO with high specific surface area and high content of N is prepared via GO reduction and N -doping of DMF, corrosion oxidation pore-forming of H 2 O 2 as well as further reduction and N -doping of N 2 H 4 •H 2 O under the solvothermal condition. The porous HSN-rGO has a high BET specific surface area of 464.3 m 2 g −1 . The N content in HSN-rGO is 5.27 at.%. The HSN-rGO shows a strong adsorption capability for the soluble lithium polysulfides (LiPSs) and more importantly it presents an excellent catalytic capability for the redox conversion of LiPSs. The HSN-rGO modified separator can inhibit the shuttle effect of LiPSs in Li-S battery. Besides, the HSN-rGO based separator has a good electrolyte wettability. The catalytic activity of HSN-rGO and Li + diffusion property in Li-S battery are well studied quantitatively. The Li-S battery with HSN-rGO-PP separator exhibits a high initial discharge capacity of 1372.8 mAh g −1 at 0.1 C and 681.5 mAh g −1 at 2 C, and a low-capacity decay rate of 0.055% per cycle for 1000 cycles at 1 C. This study proves the strategy that the HSN-rGO modified separator can effectively inhibit the shuttle effect of LiPSs and accelerate the redox reaction kinetics for high-performance Li-S battery.
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高影响因子
Materials Today Communications
·
2019
·
IF 1.859
Vu Van Cat,Ngo Xuan Dinh,Le Thi Tam,Nguyen Van Quy,Vu Ngoc Phan,Anh-Tuan Le
In this work, we established a simple and cost-effective method of dispersing silver nanoparticles on the surface GO nanosheets using a one-pot hydrothermal process with the presence of polyvinylpyrrolidone (PVP) as both surfactant and reducing agent. The systematic effects of synthesis conditions on the microstructure and formation of silver nanoparticles on the surface of rGO nanosheets were studied. Notably, the high-crystalline silver nanoparticles with a size of 15 nm were uniformly dispersed on the surface of rGO nanosheets when synthesis conditions were optimized at hydrothermal temperature 160 °C, pH = 9 and 10 mM of silver nitrate precursor. Our analysis results indicate that the as-prepared rGO-Ag nanocomposites exhibit the highest SERS efficiency and good sensitivity with methylene blue organic dye and tricyclazole pesticide. These can be explained by the electron interactions between silver nanoparticles and graphene oxide, which makes unique material advantages for the highly effective detection of pollutant molecules in the environmental monitoring applications.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 19
·18246-18258
·
IF 2.195
Yu Zongxue,Feng XiaoFang,Min Xia,Li XiuHui,Shao LiangYan,Zeng HaoJie
In the study, the reduced graphene oxide/graphitic Bi 12 O 17 Cl 2 –TiO 2 heterojunctions sheet membrane(RGO/PDA/Bi 12 O 17 Cl 2 –TiO 2 ) was fabricated by the dopamine modification and assembling the RGO/PDA/Bi 12 O 17 Cl 2 –TiO 2 composites on the surface of commercial CA(cellulose acetate) membrane to degrade methylene blue (MB) and p-chlorophenol (4-CP) to harmless products. These membrane materials were comprehensively characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and UV–vis diffuse reflectance spectra (DRS). The results showed that RGO/PDA/Bi 12 O 17 Cl 2 –TiO 2 nanofiber membrane exhibited extremely high degradation performance with a good distribution of RGO/PDA/Bi 12 O 17 Cl 2 –TiO 2 on the CA nanofiber membrane surface. Besides, the complete photodegradation of 100 mL MB (15 mg L −1 ) solution and 100 mL 4-CP (15 mg L −1 ) solution with artificial visible-light was achieved after 100 min and 160 min, respectively. The RGO/PDA/Bi 12 O 17 Cl 2 –TiO 2 -CA composite membrane revealed the ability of continuous and simultaneous flow-through separation of oil/water emulsion and degradation of soluble organic dye under visible-light irradiation in a short time. Moreover, the nanofiber membranes exhibited excellent stability and reusability for MB-containing oil–water mixed emulsion separation has great potential to be applied in industrial application.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Shiyu Liu,Rongchang Wang,Cuixiang Ma,Dianhai Yang,Duanxin Li,Zbigniew Lewandowski
Oxygen and reactive oxygen species (ROS) produced during algal photosynthesis are important electron acceptors in photosynthetic algal microbial fuel cell (PAMFC) cathodes. In this study, spongy and petaline ZnO– [email protected] carbon felt cathodes were first fabricated through in situ ZnO–NiO growth and further modified with reduced graphene oxide (rGO) via electrodeposition and cyclic voltammetry reduction. The structural and electrochemical properties of the ZnO– [email protected] carbon felt cathodes were characterized, and the ROS adsorption capacity of the cathodes was analyzed via temperature programmed desorption and UV spectrophotometry. The results illustrated that the optimal molar ratio of Zn to Ni was 0.2 for cathode surface modification, and the specific surface areas of spongy and petaline ZnO 0.2 – [email protected] reached 215.26 and 230.88 mg·g −1 , respectively, which were more than 200-fold higher than that of prefabricated carbon felt. The areal capacitance values of spongy and petaline ZnO 0.2 – [email protected] cathodes reached 3033.5 and 6388.92 mC·cm −2 , respectively. The ROS concentrations on the spongy and petaline ZnO 0.2 – [email protected] cathode surfaces reached 52.36 and 64.02 μmol·L −1 , respectively, which were nearly 2-fold higher than that for prefabricated carbon felt cathode. The power densities of PAMFCs using spongy and petaline ZnO 0.2 – [email protected] as cathode electrodes were 20.18 and 31.92 mW·m −2 , respectively. The improvement of electrochemical performance of PAMFCs is partially ascribed to the enhanced ROS adsorption capacity of ZnO– [email protected] cathodes. Therefore, ROS adsorption capacity is recommended as an evaluation indicator for PAMFC cathodes.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yunfei Li,Jia Liu,Xuepeng Chen,Xiaole Yuan,Nan Li,Weihua He,Yujie Feng
Anode performance is a key factor for power output and long-term stability of microbial fuel cells (MFCs). This is because it considerably influences biofilm growth and extracellular electron transfer (EET). In this study, carbon cloth (CC) was used as the anode substrate, and a hydrophilic, biocompatible, and highly conductive CC–PDA–rGO anode was synthesized by surface modification with polydopamine (PDA) and reduced graphene oxide (rGO) using an easy and facile solvent immersion method. The power density of the MFC with CC–PDA–rGO anode reached 2047 mW·m −2 , which was 6.1, 2.2, and 1.9 times greater than those of the CC, CC–PDA, and CC–rGO, respectively. The charge transfer resistance of the MFC prepared with the CC–PDA–rGO anode was ten-fold lower than that of the CC anode. Moreover, the EET was remarkably enhanced on the CC–PDA–rGO anode, and the electroactive biofilm of CC–PDA–rGO anode exhibited the highest cell viability. The CC–PDA–rGO anode achieved the highest cumulative total charge, which suggested that it had the best electron harvesting capacity. The foregoing can be attributed to the introduction of PDA and rGO onto the electrode surface. The PDA possesses superior hydrophilicity and excellent adhesive force for strong interaction with biofilm, whereas the rGO provides abundant electrochemically active sites to facilitate electron transfer from the biofilm to the anode. This work provides an easy and facile surface modification method for the development of high-performance MFC anode materials.
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高影响因子
危险品化学品经营许可证（带存储）