SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Liqin Zhou,Qiuyuan Huang,Hongbing Ji,Xuan Tang,Yuxuan Zhang,Kungang Chai
Bisphenol A (BPA) is a common industrial products ingredient, whose widespread utilization leads to a non-negligible problem of water pollution. For efficient adsorption of BPA, hyper-crosslinked β-cyclodextrin polyurethane (CDPU-HCP) was synthesized via crosslinking β-cyclodextrin (β-CD) with 4,4′-diphenylmethane diisocyanate followed by further external crosslinking reaction. CDPU-HCP showed high surface area (1133.12 m 2 ∙g −1 ) and has hierarchically pores, such as β-CD nanocavities, micropore and mesopores. Adsorption data fitted better with Freundlich adsorption isotherm model and the pseudo second order kinetic model. The fitted maximum adsorption capacity toward BPA was shown to be 371.8 mg∙g −1 . The stable adsorption performance during successive six recycling experiments indicated the excellent recyclability of CDPU-HCP. Furthermore, the density functional theory (DFT) calculations showed hydrophobic interaction of β-CD cavity and π-π interactions between aromatic moieties and BPA synergistically promoted the adsorption process. Therefore, CDPU-HCP was suggested to be a promising adsorbent in the treatment of BPA.
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Ling Yuan Liao,Wen Hong Ruan,Ming Qiu Zhang,Li Weihao
The 5th generation mobile communication technology (5G) requires materials with high reliability, high dimensional stabilities, and low dielectric constant (Dk) and low loss factor (Df). However, achieving both high dimensional stabilities and low dielectric is difficult. In this work, we propose a strategy to improve dimensional stabilities of printed circuit board (PCB) substrates without reducing their dielectric properties by introducing crosslinking agents with trifluoromethyl groups and allyl groups to polymers. Polyphenylene oxide (PPO) was selected as the representative research object, and a series of cured PPO-Allyl-F with varying contents of trifluoromethyl and allyl side chains were designed and synthesized. The molecular structures of the thermosetting PPO were characterized using 1H nuclear magnetic resonance (1H NMR) and Fourier transform infrared (FTIR) spectroscopy. The isothermal curing kinetics of the thermosetting PPO were monitored with in situ FTIR. The thermal stability, mechanical properties, glass transition temperature (Tg), coefficient of thermal expansion (CTE), and dielectric properties of the cured PPO-Allyl-F materials were investigated in detail. The results show that the obtained thermosetting PPO with improved dimensional stabilities and low dielectrics has great potential for the application in high-frequency electronic circuits. This work provides a new approach for developing high-performance polymers that can address the contradiction between dielectric properties and dimensional stability.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2023
·Vol. 33
·期 9
·2890-2905
·
IF 4
Dong Xiyuan,Wang Dongbo,Lei Ye,Yang Yi,Liu Ji
Photocatalysis is regarded as a promising environmental remediation technologies, and manganese oxide is expected to be one of the most efficient photocatalysts. Herein, a rod-shaped manganese trioxide/phosphorus doped carbon nitride Z-scheme heterojunction photocatalyst (Mn 2 O 3 /PCN) was prepared. Using rod-shaped phosphorus doped carbon nitride (PCN) as substrate, Mn 2 O 3 particles grew on the surface. This not only inhibited the accumulation of Mn 2 O 3 but also prevented the surface layer shedding of PCN. According to the experimental results, the energy band gap of PCN and Mn 2 O 3 are 2.923 eV and 1.883 eV, respectively. The photocatalytic performance of Mn 2 O 3 /PCN enhanced significantly by constructing heterojunction. The optimum sample 0.50%Mn 2 O 3 /PCN was obtained by using the optimum ratio of precursors. The removal rates of Rhodamine B, Tetracycline Hydrochloride, Bisphenol A and Sulfamethoxazole with 0.50%Mn 2 O 3 /PCN were 99%, 99%, 59% and 71%, and the removal rates of total organic carbon were 72%, 66%, 39% and 49%, respectively. It was proved that ·O 2 − and ·OH were the main active species for Mn 2 O 3 /PCN to degrade pollutants via free radical trapping experiment and electron spin resonance. The migration direction of photogenerated electrons and heterojunction type were deduced by calculating work function (Φ) of Mn 2 O 3 (Φ = 7.91 eV) and PCN(Φ = 4.38 eV), and photocatalytic mechanism was proposed. This study has research significance for the application of manganese oxide based heterojunction photocatalyst in the field of environmental remediation.
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Tian Yuxuan,Chen Xin,Ding Ning,Liu Hong
The adsorption micelle flocculation (AMF) effect of biosurfactants (rhamnolipids, RL) and polymerized ferric sulfate (PFS) on the removal of low molecular weight benzoic acid (benzoic acid and p -methyl benzoic acid) and phenol (2,4-dichlorophenol and bisphenol A) organics was investigated. The coexistence system of RL and organic matter was constructed, and the effects of pH, Fe concentration, RL concentration and initial concentration of organic matter on the removal effect were discussed. For benzoic acid and p -methyl benzoic acid, the increase of Fe and RL concentrations was beneficial to their removal rates under weak acidic conditions, and the removal rate of the coexistence system was higher for methyl benzoic acid (87.7 %) than for benzoic acid (78.6 %), which might be attributed to the stronger hydrophobicity of the coexistence system for methyl benzoic acid; while for 2,4-dichlorophenol and bisphenol A, pH and Fe concentration changes had less effect on the removal rate, but the increase in RL concentration was favorable to the removal rate, which was 93.1 % and 86.7 % for BPA and 2,4-dichlorophenol, respectively. These findings provide feasible ideas and directions for the removal of organics by AMF using biosurfactants.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Jizhong Wu,Wenya Wei,Muhammad Zareef,Shuhua Li,Qin Ouyang,Quansheng Chen
Bisphenol A (BPA) is an endocrine disrupting chemical having estrogenic properties that can enter the body through leaking from food containers or the food chain. An upconversion nanoparticle-based aptasensor integrated with microfluidic chip was simply designed to achieve the determination of BPA in foodstuff. Core-shell structured upconversion nanoparticles with 6.41-fold luminescence enhancement were used as fluorescence donors and gold nanoparticles as fluorescence acceptors to construct fluorescence resonance energy transfer (FRET) system. The BPA aptamer serves as a link between the building of the FRET system and the BPA-specific recognition component. The fishbone-structured microfluidic chip only needs 0.5 μL sample solution and 4 min to determine the presence of BPA. The proposed method has good linearity for BPA in the range of 0.02–100 ng/mL with calibration curve of y = 0.0918 x + 0.6477 and limit of detection of 0.014 ng/mL. It is tremendously competitive to perform on-chip analysis that enables microsampling and rapid determination.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Junjie Xu,Chao Zhu,Renlan Liu,Qile Fang,Yong Zheng,Zhiqiao He,Shuang Song,Yi Shen
For the elimination of pharmaceutical and personal care products (PPCPs) from water, various methods and materials have been designed, while the removal effect of PPCPs is still mediocre due to the limitation of trace concentration. Therefore, constructing high-electron-density reactive centers (HRCs) for effective processing is urgent due to the potential threat to human health posed by PPCPs in water. Herein, a bimetallic metal–organic framework (BMOF-Ti/Zr 6% ) was synthesized by a solvothermal method with enhanced adsorption and photocatalytic capacity to address the issue. The Zr doping in metal clusters elevated the adsorption capacity of 2,2′,4,4′-tetrehydroxybenzophenone (BP-2) on BMOF-Ti/Zr 6% to 4032 μmol/g, and the photocatalytic rate was more than 6 times higher than that of the pristine metal–organic framework. The enhanced adsorption and photodegradation of PPCPs on BMOFs was ascribed to the charge redistribution between Ti and Zr inducing the formation of HRCs. The electrons accumulated on HRCs altered the adsorption performance of metal sites and facilitated the generation of reactive oxygen species, which was further confirmed by theoretical calculations and indirectly validated by the interface behaviors of dissolved organic matter (DOM). Moreover, the possible reaction pathway of BP-2 degradation was explored. In addition, the BMOF-Ti/Zr 6% retained more than 90% of initial adsorption capacity in photocatalytic regeneration experiments, demonstrating the potential for application in natural water matrix. These findings reinforce the understanding of charge behaviors in bimetallic materials and contribute to understand the impact of DOM in water remediation processes.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Tairan Wang,Tao Wan,Songsong He,Jian Wang,Mingrui Yu,Yang Jia,Qi Tang
Structural defects and surface functional group defects engineering in graphitic carbon nitride (g-C 3 N 4 ) have great significance for optimizing its electron structure and photocatalytic activity. In this study, g-C 3 N 4 was prepared via a solvothermal method without high-temperature calcination , and then carboxyl group defects-containing g-C 3 N 4 was synthesized through post-modification. FTIR and XPS verified the presence of highly favorable carboxyl groups. Morphological and photoelectrical experiments verified that adding branched chains with carboxyl groups onto g-C 3 N 4 effectively increased the specific surface area and pore volume of g-C 3 N 4 , improved the absorption of visible light and enhanced the separation and migration of photogenerated carriers. As a result, the modified g-C 3 N 4 (CN-COOH) had a high bisphenol A (BPA) photocatalytic degradation of 99.6% at 60 min and a high kinetics constant of 0.067 min −1 , which was 13.4 times that of the original g-C 3 N 4 under visible light irradiation. In addition, CN-COOH showed high photocatalytic stability with photocatalytic activity decreased by only 1.5% after 5 cycles. Active species capture experiments have demonstrated that •O 2 − and holes are the main active substances in the BPA photocatalytic process. These findings open a new avenue for precise carboxyl modification of g-C 3 N 4 via an environmentally-friendly post-modification approach and provide the mechanism of carboxyl defects of g-C 3 N 4 photocatalysts on prompting photogenerated charge separation.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Guanhua Liu,Leijie Guo,Lingfeng Zhao,Liya Zhou,Suoqing Zhang,Yunting Liu,Xiaobing Zheng,Yanjun Jiang,Jing Gao,Lihui Wang
Biocatalytic membranes are a green and effective option for the removal of micropollutants (MPs) from water. The effective immobilization of enzyme together with facial fabrication of membrane is constantly required. Herein, a biocatalytic membrane was prepared by one-step pressure-assisted self-assembly of graphene oxide (GO), polyethyleneimine (PEI) and laccase (Lac) on the surface of hydrolyzed polyacrylonitrile (HPAN) membrane. The physical and chemical property of membranes, and the immobilization of laccase were characterized. Under optimal conditions, the biocatalytic membrane has a bisphenol A (BPA) removal rate of 95.3%, and the rejection for dyes can be higher than 97% with salts rejection of less than 23% and pure water permeance of 207.4 LMH/bar. Meanwhile, GO-PEI-Lac membrane retained stable removal rate under a wide pH range and feed BPA concentrations. The membrane can also remove various phenolic MPs. In addition, the GO-PEI-Lac membrane retained more than 80% removal rate after 6 cycles. Overall, this study opens up a convenient avenue for the facial fabrication of high-efficient biocatalytic membranes for MPs removal.
✓ 已验证
产品关联
DOI
高影响因子
Environmental Progress & Sustainable Energy
·
2023
·Vol. 42
·期 5
·e14140
·
IF 2.8
Li Hua,Taozhi Cheng,Ting Wei
Advanced oxidation based on persulfate applied for the removal of organic pollutants has received widespread attention. Here, combining hydrothermal synthesis and a high-temperature calcination approach, we constructed an effective copper oxide-modified biochar from wood waste ( Ginkgo biloba rods) for the removal of bisphenol A (BPA) from contaminated waterways. The modified biochar with copper oxide in its structure (CuO/BC) exhibited a densely arranged needle-shaped structure different from pristine timber waste biochar (BC). CuO/BC can activate persulfate efficiently, and the removal rate of BPA could reach 100% within 20–30 min, approximately three times higher than that of BC. Moreover, CuO/BC was more suitable for treating BPA wastewater under alkaline conditions. The stability of CuO/BC, reaction intermediates, and possible degradation pathway were investigated. These results demonstrate the potential of the application of CuO/BC for organic wastewater treatment and shed light on a new approach to develop wastewater treatment materials that are carbon-based and cost-effective.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Chao Zhang,Mengxiang Ye,Huaimeng Li,Zhenzhen Liu,Zhen Fu,Haimin Zhang,Guozhong Wang,Yunxia Zhang
Heterogeneous electro-Fenton is a promising technology for the degradation of organic contaminants. To ensure its effectiveness, it is in urgent demand to design cathode materials with the integrated capability of sufficient H 2 O 2 generation and subsequent activation into reactive oxygen species (ROS) together with catalytic stability. Herein, a composite constituted by Fe/Fe 3 C nanoparticles embedded into N-doped porous carbon (NPC), designated as Fe/Fe 3 C@NPC, was successfully fabricated from Fe 3+ -loaded poly(imine dioxime) (PIDO) membrane via the thermal treatment in N 2 atmosphere and employed as the heterogeneous electro-Fenton catalyst to degrade bisphenol A (BPA). By optimizing the pyrolysis temperature and loading level of iron species, the catalyst obtained at 800 °C (i.e. Fe/Fe 3 C@NPC-800) achieved almost 100% of BPA removal efficiency within 120 min via the electro-Fenton system, accompanied by 69.2% of the total organic carbon (TOC) removal rate. Furthermore, the proposed composite catalyst also exhibited satisfactory reusability and stability, as reflected by low decrease in removal efficiency after six successive degradation tests and limited iron leaching (<0.5 mg/L). This work might provide valuable instruction for the rational design of highly efficient and stable heterogeneous electro-Fenton catalysts for organic pollutant control.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2023
·
IF 8.3
Wenjun Zhu,Xiaohua Zuo,Xiaofei Zhang,Xiangyi Deng,Deng Ding,Chunlei Wang,JunTao Yan,Xiaobo Wang,Guanghui Wang
A novel CuO–Fe 3 O 4 encapsulated in the carbon framework with abundant oxygen vacancies (CuO–Fe 3 O 4 @C) was successfully prepared by thermal conversion of Cu(OAc) 2 /Fe-metal organic framework. The as-prepared catalyst exhibited excellent peroxymonosulfate (PMS) activation performance, good recyclability and fast magnetic separation. Under optimal conditions, the added BPA (60 mg/L) could be completely removed by CuO–Fe 3 O 4 @C/PMS system within 15 min with the degradation rate constant ( k ) of 0.32 min −1 , being 10.3 and 246.2 times that in CuO/PMS (0.031min −1 ) and Fe 3 O 4 /PMS (0.0013 min −1 ) system. A deep mineralization rate of BPA (＞80%) was achieved within 60 min. The results demonstrated the synergistic effect of bimetallic clusters, oxygen vacancies and carbon framework was a key benefit for the exposure of more active sites, the electron donor capacity and the mass transfer of substrates, thereby promoting the decomposition of BPA. Capture experiments and EPR indicated that 1 O 2 was the predominant reactive oxygen species (ROSs). The degradation routes of BPA and the activation mechanism of PMS were proposed. This study offers an opportunity to develop promising MOFs-derived hybrid catalysts with tailored structures and properties for the practical application of SR-AOPs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Wenfang Du,Jie Liu,Hong Li,Chenyi Deng,Jie Luo,Qianqian Feng,Yan Tan,Shengyuan Yang,Zhaoyang Wu,Fubing Xiao
Bisphenol A (BPA), one of the most abundantly produced endocrine disrupting chemicals, is widely used in everyday plastic products and thus must be monitored. Multimode sensing platforms are able to combine the advantages of different strategies while solving the issues of inaccurate test results of single signal sensing. However, the exploration in this field is limited due to the compromise of sensing conditions and inevitable mutual interferences of different systems. Herein, we constructed a two-dimensional photonic crystal dually cross-linked supramolecular hydrogel (2DPCDCSH) by utilizing a host–guest pair of β-cyclodextrin (β-CD) and tert-butyl (t-Bu) as the second cross-linking for colorimetric and fluorescent dual-mode sensing of BPA. Based on the fact that BPA can act as a competitive guest to break the host–guest interaction between β-CD and t-Bu, the cross-linking density decreased and an expansion-induced structural color change occurred. Sensitive and selective BPA detection can be easily achieved by measuring the Debye diffraction ring diameter or observing the color change of 2DPC with a detection limit of 1 μg mL–1. Moreover, the formation of the β-CD/BPA complex gave a significant enhancement of the intrinsic fluorescence of BPA, obtaining a detection limit of 0.001 μg mL–1. The two sensing systems can share the same reaction condition and yield a wider dynamic response range than the single signal strategy. Overall, the proposed method presented an efficient, rapid, cost-effective, and regenerative dual-mode method for BPA analysis and shed new insights for the design of diversified sensing platforms.
✓ 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）