Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Chaowei Wan,Yu Yang,Jianxin Chen,Yang Wu,Zhifei Ma,Daishe Wu
Manganese sulfide (MnS) has been considered as a persulfate (PS) activator due to the presence of manganese and sulfur elements. Manganese sulfide (MnS) has been considered as a persulfate (PS) activator due to the presence of manganese and sulfur elements. However, the water solubility and hydrophobicity of MnS result in inefficient PS activation . Herein, we demonstrated that the MnS/PS system was significantly efficient for the degradation of phenol in the presence of Fe 2+ . Within the MnS/PS system, the Fe 2+ /Fe 3+ cycle could act as a station to facilitate the transfer of electrons from Mn 2+ and S 2- to PS, thereby enhancing electron transfer efficiency. As a result, the degradation efficiency of phenol reached 91.38% within 30 min in the Fe 2+ / MnS/PS system, but the MnS/PS system without Fe 2+ was only 61.63%, and the reaction rate of the former was 2.52 times that of the latter. In addition, the effects of different conditions on phenol degradation were investigated, including MnS, Fe 2+ , PS, phenol, initial solution pH, inorganic anions. Quenching experiment and electron paramagnetic resonance (EPR) confirmed that sulfate radical, hydroxyl radical and singlet oxygen were the main active substances in the degradation of phenol. This study provides a promising idea for application in the advanced treatment of groundwater and wastewater at the end of flocculation treatment with high background iron ions.
✓ 已验证
产品关联
DOI
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 3.9
Zibin Pan,Mengying Liu,Zuliang Chen
Acid mine drainage (AMD) has long been an environmental problem due to its acidic solution containing toxic metal ions. Despite the fact that a variety of nanomaterials have been devised to remove metallic contaminants from aqueous solutions, there are large differences between real AMD and aqueous solutions. Here, biosynthesized Fe/Cu nanoparticles (Fe/Cu NPs) functioned to remove metalloids and heavy metals from real AMD. The removal capacities of As, Mn, Ni, Cr and Cd were severally 1.305, 0.095, 0.027, 0.082 and 0.028 mg/g, which were consistent with the pseudo-first order kinetic model but not with the intraparticle diffusion model. After removal in AMD, the particle size and pore diameter of Fe/Cu NPs rose from 86.63 ± 0.88 nm and 56.36 nm to 110.53 ± 1.40 nm and 71.51 nm, respectively. Furthermore, organic substances on Fe/Cu NPs were able to adsorb heavy metals, namely Ni, Mn, and Cd from the AMD because they acted as an encapsulant able to maintain the stability of Fe/Cu NPs. Consequently, a mechanism for the removal of As and other heavy metal ions from AMD was proposed, one which was based on the rapid adsorption of multiple heavy metals through electrostatic interaction and ion exchange. This study provides a new and important insight into removing metalloids and heavy metals from AMD using green nanomaterials.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2023
·
IF 4.3
Qi Guo,Xiaorong Huang,Yajuan Huang,Zhaowei Zhang,Peiwu Li,Li Yu
Aflatoxin B 1 (AFB 1 ) is a prominent food contaminant known for its high toxicity. Rapid, low-cost, and sensitive detection of AFB 1 is an urgent demand for food safety risk control. In the traditional enzyme-linked immunosorbent assay (ELISA) method for AFB 1 detection, horseradish peroxide (HRP) is high-cost and possesses poor environmental stability. In this study, a direct competitive single-atom nanozymes (SAzymes) -linked immunosorbent assay was developed based on Fe-N-C SAzymes. The proposed methods exhibited excellent sensitivity, rapid detection, fabrication, and low cost. Under the optimal conditions, the limit of detection of the new assay was 3.3 pg mL −1 , with a quantitative relationship between 0.0084 and 0.358 ng mL −1 . In addition, the developed method presented good recoveries in spiked samples, ranging from 84.50% and 103.75%, with coefficients of variation below 10%. Furthermore, the developed detection method showed good consistency (R 2 = 0.9852) with the reference method, liquid chromatography/mass spectrometry (LC-MS/MS). To our knowledge, this is the first report about single-atom nanozymes-based ELISA for AFB 1 determination. This work provides a feasible strategy for the rapid and sensitive detection of food contaminants using SAzymes.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 47
·22007-22016
·
IF 3.3
Yuxuan Zheng,Junping Zhao,Meifang Yan,Yuhua Gao,Haihua Li,Zhenfa Liu
Pudding-like Fe/C materials were successfully synthesized via an emulsion cross-linking method followed by a heat-treatment process. The morphologies and compositions can be easily controlled via adjusting the heat-treatment temperature. XRD, SEM, TEM, XPS, VSM, BET surface area measurements and zeta potential analysis were used to characterize the as-prepared samples. The adsorption capacity of MB (methylene blue) was systematically studied in different initial concentrations and pH of MB solution and at ambient temperature. Kinetics and isotherm synthesis were fitted well with the model of pseudo-second-order and Langmuir isotherms, respectively. The pudding-like Fe/C composites exhibited excellent adsorption performance in the removal of MB and the maximum adsorption capacity was 243.9 mg g−1, which was obtained for a 100 mg L−1 of MB solution at pH 7.0 and 25 °C. After ten cycles of adsorption experiments, the adsorption capacity can be maintained at about 93%, which indicated that the pudding-like Fe/C exhibited excellent adsorption stability and reusability.
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2023
·
IF 4.6
Haiyang Zhang,Hongyan Zhang,Jianping Man,Chu Chen
A humidity sensor with high performance based on Fe 3+ ions doped with SnO 2 (Fe/SnO 2 ) was synthesized by hydrothermal method and its mechanism was studied by the first principle based on density functional theory . Experimental results show that doping Fe 3+ ions can effectively improve the performance of SnO 2 humidity sensor. Compared with SnO 2 , the resistance of Fe/SnO 2 humidity sensor increases from 4.5 to 5.5 orders of magnitude, the humidity hysteresis error decreases from 42.4% to 3.8% and the response/recovery time changes from 11 s/48 s–10 s/8 s. Calculations show that Fe 3+ ions can enhance the chemical and physical adsorption energy , improving the sensitivity and linearity and reducing the hysteresis error and recovery time of SnO 2 , respectively. Moreover, a simple circuit for respiratory detection was designed based on Fe/SnO 2 , and the number of LED lights can distinguish different breathing states through resistance changes of the Fe/SnO 2 humidity sensor. This study indicate Fe / SnO 2 humidity sensor can be used in non-contact and visual breath detection, which has potential applications in preventing respiratory disease.
✓ 已验证
DOI
高影响因子
Nanoscale
·
2023
·Vol. 15
·期 39
·16188-16198
·
IF 6.7
Qingxue Lai,Hongmei Zheng,Wanying Zhang,Yi Sheng,Luanjie Nie,Jing Zheng
Fe–N–C catalysts with highly dispersed metal active centers were developed as promising non-precious metal materials for acidic oxygen reduction reaction (ORR) electrocatalysis. However, such kind of novel catalysts still suffer from major challenges in the manipulation of dispersion, utilization, and stability of the Fe-based metal centers. Herein, a N-rich molecular dual-guided pyrolysis strategy was proposed to develop an efficient yolk-shelled Fe–N–C ORR electrocatalyst. A unique yolk-shelled nanostructure with a relatively ordered shell and disordered yolk of a carbon skeleton was controllably constructed via this guided-pyrolysis route from the precursor of Fe-doped zeolitic imidazolate framework-8 (Fe-ZIF-8). Moreover, the atomic-level dispersion of Fe element in the carbon skeleton could be achieved via the dual guidance from phenanthroline and melamine molecules. The optimized Fe–N–C catalyst demonstrated a half-wave potential of 0.78 V vs. RHE in acid media, close to commercial 30% Pt/C, along with a small negative shift of 19 mV after an accelerated durability test. These enhanced electrocatalytic properties could be attributed to the preferred transformation of the Fe precursors to atomically dispersed Fe–Nx active configurations, as well as the enhanced three-phased interfacial reaction kinetics.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Hanxiao Zhang,Zhengyan Wang,Dandan Wu,Yanlan Zhang,Yongzhen Wang
The production of magnetic biomass-derived carbon-based aerogels has made outstanding contributions to green chemistry and sustainable development so as to alleviate the growing electromagnetic pollution problems. In particular, carboxymethyl cellulose (CMC) possessing three-dimensional (3D) porous structure , low density and biodegradability is an effective precursor for the preparation of magnetic carbon aerogels. In this work, lightweight porous Fe 3 O 4 -Fe/carbon aerogels (FFCA) were synthesized by depositing magnetic metals on chitosan (CS)-reinforced CMC via a facile and eco-friendly strategy. The 3D porous structure and non-homogeneous conductive network endow the FFCA aerogels with comprehensive properties. Specifically, the introduction of magnetic material and the carbonization process under the temperature gradient result in tunable electromagnetic parameters and good impedance matching, allowing electromagnetic waves to enter the absorber and dissipate as much as possible. For instance, the FFCA prepared at 900 °C exhibits the impressive microwave absorption performance due to the synergistic transition between magnetic permeability and dielectric constant, with the minimum reflection loss of −45.5 dB at 2.6 mm and the effective absorption bandwidth of 3.7 GHz. This work provides an important reference for the design of eco-friendly CMC-based magneto-dielectric synergistic microwave absorption materials .
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 48
·105685-105699
·
IF 5.8
Dong Pei,Shan Peipei,Wang Shuaijun,Ge Baosheng,Zhao Chaocheng
In this work, efficient Fenton strategy have been proposed for degradation of shale gas fracturing flow-back wastewater using the spherical Fe/Al 2 O 3 supported catalyst. Prior to actual fracturing fluid treatment, the typical model wastewaters such as p -nitrophenol and polyacrylamide were employed to evaluate the catalytic properties of prepared catalyst, and then Fenton treatment of the shale gas fracturing flow-back wastewater was performed on the self-assembled catalytic degradation reactor for continuous flow purification. Results showed that under the conditions of 0.25 mol L −1 impregnating concentration, pH 4, 50 g L −1 catalyst and 0.75 mL L −1 30% H 2 O 2 , the removal efficiency of p -nitrophenol and polyacrylamide reached 74% and 61%, respectively, while the COD removal of fracturing flow-back fluid was approximately 48% with the residual 88 mg L −1 COD, meeting the emission standards of the integrated wastewater discharge standard (GB 8978-1996, COD < 100 mg L −1 ). This work offers new alternatives for Fenton treatment of real wastewater by efficient and low-cost supported catalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Can Fang,Xiangmei Tang,Qingfeng Yi
Exploring efficient non-precious metal oxygen electrocatalysts for oxygen reduction/evolution reactions (ORR/OER) is of great importance in electrochemical energy conversion devices like metal-air battery. Among them, carbon-based composites derived from metal-organic framework (MOF) exhibit excellent catalytic performance in ORR/OER. In this paper, Co-MOF-67 was firstly prepared, and then mixed with FeCl 3 ·6 H 2 O and dicyandiamide, followed by a one-step pyrolysis to obtain bamboo-like nitrogen-doped carbon nanotubes . For the samples, Fe and Co nanoparticles were encapsulated in the front end of the carbon nanotubes and the presence of new (n)-diamond carbon was unexpectedly found. The obtained catalyst (FeCo@CNTs-60) has an onset potential of 1.04 V for ORR in alkaline solution, which is close to the commercial Pt/C (40 wt% Pt) of 1.05 V. The onset potential of 1.02 V in quasi-neutral solution exceeds that of Pt/C of 0.99 V. In addition, FeCo@CNTs-60 exhibited a low potential difference of 0.81 V between OER and ORR potentials. The alkaline zinc-air batteries, fabricated with the sample as the electrocatalyst of air electrode, exhibit higher peak power density and stability than Pt/C, while the rechargeable batteries present superior cycling discharge/charge stability at 5 mA·cm −2 and 10 mA·cm −2 . In particular, the battery with FeCo@CNTs-60 was conducted for continuous over 1300 h of ultra long-term cycle charging / discharging test at a current density of 5 mA·cm −2 , and it reveals excellent stability with high voltage efficiency and also presents superior cycle charging / discharging stability after replacing the Zn plates and electrolyte.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Mingda Che,Xianfeng Wang,Mei Cui,Renliang Huang,Wei Qi,Rongxin Su
The frequent outbreaks of Phaeocystis globosa ( P. globosa ) blooms in coastal areas have seriously threatened nuclear power safety. In this study, tannic acid (TA) was used to accelerate the removal of P. globosa from seawater by Fe (Ⅱ) activated persulfate (PS). In comparison with the Fe (Ⅱ)-PS system, the higher removal efficiency of P. globosa was obtained in the TA-Fe (Ⅱ)-PS system (91.2% vs 67.5%). The removal efficiency of fluorescence value, chlorophyll a, turbidity and total organic carbon (TOC) reached up to 90.1%, 91.2%, 61.8% and 51.6% with the addition of 10 mg L −1 of TA, 100 mg L −1 of Fe (Ⅱ) and 240 mg L −1 of PS in 420 min. The flocs images confirmed that TA played a dual role in regulating Fe (Ⅱ) concentration and activating PS, which facilitated the pre-oxidation of algae cells. Finally, the inactivated P. globosa settled to the bottom with the iron mineral flocs. In addition, positive environmental impacts were also validated due to the decrease in total organic carbon (TOC), total nitrogen (TN), total phosphorus (TP) and chemical oxygen demand (COD). The findings demonstrated that TA-Fe (Ⅱ)-PS system is a promising candidate for the removal of P. globosa from seawater.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yuan Tan,Jiangcheng Tang,Caichen Yang,Yunfeng Tian,Ziling Wang,Jian Pu,Bo Chi
The double perovskite (Pr 0.5 Ba 0.5 ) 1.8 Fe 1.8 Mn 0.2 O 5-δ decorated with in situ exsolved Fe nanoparticles (Fe@PBFM) was used as the cathode in a solid oxide electrolysis cell (SOEC) to convert CO 2 to CO and exhibited high efficiency and stability. This catalyst is synthesized from the simple perovskite (Pr 0.5 Ba 0.5 ) 0.9 Fe 0.9 Mn 0.1 O 3-δ (PBFM) by annealing it under an H 2 -N 2 atmosphere at 850 °C for 15 h. The cell fabricated with the Fe@PBFM cathode shows a higher current density of 1.6 A/cm 2 at 850 °C and 1.8 V than the cell with the unreduced PBFM. The increased current density can be attributed to the in situ exsolved Fe nanoparticles and generation of the Fe@PBFM double perovskite. Furthermore, the cell containing this active catalyst exhibits stable CO 2 electrolysis performance for 100 h at a stable voltage of 1.3 V, suggesting that Fe@PBFM is an attractive candidate as SOEC cathode for CO 2 electrolysis.
✓ 已验证
产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2023
·
IF 7.8
Zibin Pan,Qingqiang Gao,Zuliang Chen
The elimination of arsenic (As) from arsenic-contaminated mine groundwater has become a worldwide problem because it causes environmental degradation and poses serious risks to human health. In this study, biosynthesized Fe/Cu nanoparticles (Fe/Cu NPs) were used for the simultaneous elimination of As(Ⅲ) and As(Ⅴ) from aqueous solution, resulting in their maximum amounts removed at 8.5 and 17.5 mg/g, respectively. SEM, FTIR, and XPS characterizations indicate that the Fe component on the Fe/Cu NPs acted as an adsorption and catalyst, while the Cu component mainly developed into a co-precipitation reaction with the As species, also facilitating the Fe catalytic processed. Meanwhile, adsorption isotherms , kinetics, and DFT calculations reveal that the removal of As(Ⅲ) was primarily physical/chemical adsorption and oxidation , while the elimination of As(Ⅴ) was co-precipitation and chemisorption. The most stable adsorption site, receiving 0.252 and 0.306 electrons from As(Ⅲ) and As(Ⅴ), respectively, was the unsaturated complexes of iron on the Fe/Cu NPs. Finally, the measurements and XPS results of Fe/Cu NPs in the treatment of groundwater show that the reduced capacity to remove As was attributed to a complex reaction system that disrupted the function of the Cu component, including co-precipitation and made the catalytic process possible. This explains there are differences in the reaction processes of biosynthetic Cu/Fe NPs in aqueous solution and groundwater.
✓ 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）