SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Peiying Liu,Haiyang He,Liangjie Wang,Pingzhou Duan,Lijie Duan,Feng Qian,Xianghua Wen,Yonghui Song
Reverse osmosis concentrate (ROC) from the secondary effluent in municipal wastewater reclamation contains emerging pollutants (EPs) that require further treatment, as these EPs may otherwise pose risks to human health and ecological balance. Since ROC has relatively high salinity, Electrochlorination (E-Cl) could exactly be a promising technology for its EPs removal. However, a comprehensive and systematic investigation has yet to be carried out. In this study, targeted at E-Cl process for the ROC treatment, a series of conscientiously designed experiments were conducted to evaluate the removal performance of carbamazepine (CBZ), investigate the effects of operating conditions and water matrix on the CBZ removal, and reveal its reaction mechanisms. An excellent CBZ removal efficiency of 99.8 % was achieved within 30 min at 2 mA cm −2 in 5 mM NaCl solution. Among water matrix components, SO 4 2- , NO 3 – , PO 4 3- and NH 4 + showed minimal effects, whereas HCO 3 – and humic acid had significant influences on the CBZ removal. The roles of ClO• and Cl 2 • - radicals in the E-Cl process were clarified through quenching experiments combined with electron paramagnetic resonance and radical probe tests. The steady-state concentrations of ClO• (88.95 × 10 -14 M) and Cl 2 • - (493.02 × 10 -14 M) were much higher than those of HO• (6.91 × 10 -14 M). Both ClO• and Cl 2 • - played key roles in CBZ degradation in the E-Cl process. Probable degradation pathways of CBZ were proposed based on the intermediates identification and density function theory (DFT) calculations. This study demonstrates the potential of E-Cl systems for effective EPs removal in ROC, providing mechanistic insights for practical applications.
研究领域:
环境科学
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水处理工程
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DOI
高影响因子
RSC Advances
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2025
·Vol. 15
·期 13
·10144-10149
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IF 4.6
Lang Yang,Jialei Ying,Zhenzhong Liu,Guangyu He,Linli Xu,Mingyue Liu,Xinlei Xu,Guihua Chen,Meili Guan
Although TiO2 has been widely applied in many fields, the design and preparation of one-dimensional rutile TiO2 nanomaterials for high-efficiency photocatalysis under visible light remain challenging. Herein, uniform Co-doped rutile TiO2 nanorods with selective adsorption and photocatalytic activity for methylene blue (MB) have been developed via a one-pot molten salt flux method. Compared to pure rutile TiO2 nanorods, the Co-doped rutile TiO2 nanorods exhibited an obvious core/shell structure with smaller inner crystal face spacing (d001 = 0.20 nm) and a larger rough surface (the BET specific surface area is 25 m2 g−1). Furthermore, different dyes were employed to investigate the adsorption ability of Co-doped rutile TiO2 nanorods. The density functional theory (DFT) calculations determined that both the electrostatic potential and molecular structure could influence the adsorption behavior on the photocatalyst surface. The results indicated that the Co-doped TiO2 nanorods possessed a high selective adsorption capacity for MB (134.54 mg g−1 in neutral solution). The degradation of MB using Co-doped rutile TiO2 nanorods was conducted under visible light irradiation, yielding with an apparent rate constant of 0.301 min−1 at pH = 7. The degradation mechanism was further explored through electron spin resonance (ESR) experiments, which identified the formation of superoxide anions (·O2−) and hydroxyl radicals (·OH) in the system. This study provides a new strategy for preparing novel rutile TiO2 photocatalysts for the degradation of organic dyes under visible light.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
Nature Communications
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2025
·Vol. 16
·期 1
·1-9
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IF 15.7
Wu Yu,Li Jian,Jiang Wenxuan,Xu Weiqing,Zheng Lirong,Wang Canglong,Gu Wenling,Zhu Chengzhou
Early drug discovery is a time- and cost-consuming task requiring enzymes. Although nanozymes with metal sites akin to metallocofactors display similar activities, the lack of proximal amino acids hinders them from more adequately mimicking enzymes for drug discovery purposes. Hence, the rational design of the nanozyme second coordination sphere is desirable yet remains challenging. Herein, we report a nanozyme featuring atomically dispersed Cu-N 4 sites with proximal hydroxyl groups (CuNC-OH). Experimental and theoretical results reveal that Cu-N 4 site and hydroxyl respectively behave as cofactor and amino acid of the enzymatic pocket to interact with adsorbates, regulating nanozyme activity and inhibition. This mechanism involving dual sites is similar to that of thyroid peroxidases, which enables specific inhibition of CuNC-OH by antithyroid drugs. Based on these findings, a nanozyme-assisted drug discovery kit is established to analyze inhibition features of thyroid peroxidase inhibitors and screen out promising antithyroid drugs with a significant cost reduction compared with traditional enzyme kits.
研究领域:
生物化学
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药物发现
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材料科学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Zhen Qiu,Guanda Shen,Zefeng Ruan,Xin Zeng,Hailu Fu,Yongfu Li,Bing Yu
The removal of organic pollutants in complex aqueous environments is often hindered by the presence of natural organic matter (NOM), such as humic acid (HA), which can interfere with pollutant degradation processes. Peroxymonosulfate (PMS) activation has emerged as a promising strategy for pollutant degradation; however, its efficiency is typically compromised by NOM interference. To address this challenge, this study develops a metal–organic framework (MOF)-derived Co-N@C hollow multi-shell nanoreactor (HoMS) that effectively isolates NOMs while targeting organic pollutants. The Co-N@C HoMS, synthesized via a “hierarchical temperature control, one-step pyrolysis” strategy, demonstrated superior catalytic performance in selectively degrading carbamazepine (CBZ) in the presence of HA. Over 99% of CBZ was removed within 10 min, even with HA present. Mechanistic studies revealed that PMS activation by Co-N@C HoMS for CBZ degradation involves both radical oxidation and electron transfer pathways. The unique size-exclusion effect of the Co-N@C HoMS selectively allows small molecules (CBZ) to pass through while blocking larger ones (HA), enabling rapid and selective pollutant degradation in complex environments. This work provides a novel solution for the efficient and selective removal of multi-component pollutants in complex environmental systems.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
TALANTA
·
2025
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IF 6.1
Mei Cui,Wanling Zheng,Xiaomin Zhang,Jingru chen,Yuanteng Xu,Liangqia Guo
The cascaded catalytic reactions of glucose oxidase (GO x ) and horseradish peroxidase (HRP)-like nanozymes have been extensively used for the colorimetric detection of serum glucose. Nevertheless, the usage of biological enzyme and the adjustment of buffer pH due to the inconsistent pH of this two-step catalytic reactions are involved during the detection of serum samples. Herein, the photocatalysis of cyanamide-functionalized carbon nitride (CACN) with high efficient electron-hole separation and photoelectron storage ability was utilized for non-enzymatic colorimetric sensing of serum glucose without the need to adjust the buffer pH and the usage of biological enzyme. Under the irradiation of visible light, glucose was utilized as electron donor to quench the photogenerated holes of CACN and to facilitate the reduction of 2,3-bis-(2-methoxy-4-nitro-5-sulfophenyl)-2H-tetrazolium-5-carboxanilide (XTT) by the photoelectrons into orange-yellow product (formazan). The absorbance of formazan at 470 nm showed a linear response toward glucose over 1.8 to 22.0 mmol L -1 with the limit of detection of 0.27 mmol L -1 (S/N = 3). Furthermore, the digital image colorimetric (DIC) method was also developed by a portable mobile. Finally, the colorimetric and DIC methods were utilized for the detection of serum glucose with high accuracy, reproducibility and recovery. This work not only proposed a new strategy for the colorimetric sensing of serum glucose but also extended the photocatalysis of carbon nitride application in the field of biosensing.
研究领域:
生物化学
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分析化学
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医学检测
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DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES
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2025
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IF 1.8
Chenxi Zhang,Jingyi Wang,Sile Liu,Yue Han,Jinyu Wang,Hailong Wang
The widespread use of antibiotics has led to significant water pollution. Photocatalysis can effectively degrade antibiotics, but the performance is greatly limited by the photogenerated carrier recombination in the photocatalytic material g-C3N5. Constructing heterojunctions can enhance interfacial charge transfer, leading to more stable and efficient photocatalysis. This study synthesized a Fe2O3/g-C3N5 heterojunction using the solvothermal method. The Z-scheme charge transfer mechanism facilitated efficient separation of photogenerated carriers, preserving photoelectrons and holes with high redox activity. This process generated a substantial amount of highly reactive free radicals such as ·O2− and ·OH, enabling the efficient degradation of tetracycline (TC). Under the optimal conditions of initial concentration of TC was 200 mg/L, the quality ratio of Fe2O3 and g-C3N5 was 1:2, the catalyst dosage was 50 mg and pH = 7.0, the TC degradation rate reached 92.46% within 60 min of visible light irradiation. The photocatalytic activity’s enhancement was attributed to broad spectral absorption and effective photogenerated carrier separation. Furthermore, the photocatalytic performance can be affected by the presence of inorganic salt ions such as HCO3− and CO32−.
研究领域:
环境科学
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材料科学
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生物学
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Zhiwei Yang,Guozhong Zheng,Xinyu Wang,Kecheng Wen,Xianchun Chen,Jing Zhang
Bi 2 Fe 4 O 9 is a ferroelectric material successfully implemented in advanced oxidation processes to activate peroxymonosulfate (PMS). However, the role of its ferroelectricity in activating PMS remains unclear, and the crucial effect of spontaneous polarization is largely overlooked. This study elucidates the highly efficient capability of ferroelectric Bi 2 Fe 4 O 9 to activate PMS from the perspective of ferrocatalysis. Through experimental and theoretical analysis, it is proposed that the intrinsic ferrocatalytic activity is attributed to the spontaneous polarization that promotes the PMS adsorption process and accelerates the electron transfer. Bi 2 O 2 and FeO 6 surfaces of Bi 2 Fe 4 O 9 accumulate charge because of spontaneous polarization and elongate the O-O bond of PMS. The interfacial electron transfer between Bi 2 Fe 4 O 9 and PMS results in the generation of •OH and •SO 4 - for rapidly removing organic contaminants. This study presents atomic-scale insight into possible active sites and mechanisms of ferrocatalytic PMS activation, which may enlighten the exploitation of more effective ferroelectric materials for water treatment.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Ling Liao,Chengrong Wang,Bo Jin,Zhicheng Guo,Yang Zhao,Tian Zheng,Chenchen Yuan,Rufang Peng
Superoxide radicals (O 2 − ) generated on the surfaces of hybrid organic–inorganic perovskites (PVSK) and at the SnO 2 /PVSK interface induce rapid degradation at buried interfaces and grain boundaries (GBs). Herein, we introduce a synergistic protection strategy for the attack sites of O 2 − on PVSK. This strategy combines a fullerene alpha-trithiophene derivative (C 60 TPN) buffer layer with a fullerene propanedihydrazide derivative (C 60 PDD) additive to absorb O 2 − and eliminate the degradation caused by O 2 − . C 60 TPN serves as a buffer layer between SnO 2 and PVSK, inhibiting the generation of O 2 − at the SnO 2 surface and eliminating degradation at buried interfaces, reducing the defect density of states, accelerating the transfer of photogenerated electrons, and remarkably reducing poor contact at the SnO 2 /PVSK interface. In addition, introducing C 60 PDD into PVSK to stitch GBs suppresses the generation of O 2 − , resists the invasion of O 2 − , and reduces trap density. Results indicate that the synergistic anti-O 2 − strategy based on fullerene derivatives remarkably improves the stability and photoelectric conversion efficiency of the target devices. This work emphasizes the importance of eliminating O 2 − -induced degradation at GBs and buried interfaces in the development of stable and efficient PVSK solar cells (PSCs).
研究领域:
材料科学
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能源科学
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DOI
高影响因子
FOOD CHEMISTRY
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2025
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IF 9.8
Tianxing Fang,Qingyi Wei,Erwen Wu,Hongbin Pu
Malachite green (MG), with teratogenic and reproductive toxicity, is widely misused as an antimicrobial agent, posing a serious threat to animal and human health. Therefore, this study developed a novel recyclable Surface-enhanced Raman scattering (SERS) hydrogel substrate, TiO 2 /MXene/PAA-PAM@AuNPs (TMPA), by forming a dual hydrogen-bond network using a PAA-PAM hydrogel matrix with TiO 2 /MXene and embedding AuNPs, for detecting MG residues in aquatic products. This hydrogel exhibits high sensitivity, with a detection limit for MG of 8.13 × 10 −6 mg/L. Additionally, it can completely degrade surface-adsorbed MG within 60 min under light irradiation, achieving self-cleaning and enabling reuse for more than seven cycles, and can be stored for over 50 days while maintaining its SERS activity due to the support and preservation provided by the hydrogel network. Additionally, this substrate can rapidly detect MG residues on or within fish, offering a new strategy for monitoring MG residues in aquatic products.
研究领域:
食品安全
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分析化学
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环境科学
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DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
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2025
·
IF 7.7
Jiaqi Yang,Yu Yang,Kexuan Gao,Nigel J.D. Graham,Li-an Hou
Regulation of the types and content of reactive oxygen species (ROS) in advanced oxidation processes (AOPs) is regarded as a challenging task. Herein, the features of sulfur-vacancy (Sv) and nitrogen-vacancy (Nv), and cobalt (Co)/molybdenum (Mo)-bimetallic constituents were simultaneously incorporated into a novel Co-N@MoS 2 -COOH catalyst through a simple hydrothermal calcination method. The adsorption of oxygen (O 2 ) and peroxymonosulfate (PMS) was promoted by Sv/Nv, whereby the generation of superoxide radical (O 2 · - ) and singlet oxygen ( 1 O 2 ) species was induced, and the energy barrier for the formation of high-valent cobalt-oxo species (Co(IV)=O) was reduced. The decomposition of PMS was enhanced by a bimetal (Mo/Co) electronic pump and the O 2 · - , 1 O 2 , and Co(IV)=O active species degraded tetracycline (TC) together to achieve an efficient degradation rate (initial K obs = 0.490 min -1 ). The degradation intermediates and potential degradation pathways were identified, and the leaching of Co was within the acceptable range of environmental standards. Incorporation of the catalyst into a microfilter membrane achieved a 100% degradation of TC at an ultra-high membrane flux (1803.4 LMH/bar). This study provided new insights into the types of ROS regulated by bi-vacancy and bimetallic catalysts in AOP systems, with the intention of promoting a more sustainable and resource-efficient treatment technology.
研究领域:
环境科学
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催化化学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Qingping Zhang,Yang Xu,Haiqing Hao,Zhongxiang Guan,Meng Wang,Zongyu Feng,Xiaowei Huang,Guang Yang,Chunmei Wang
Conventional advanced oxidation processes (AOPs) face technological bottlenecks in the stepwise treatment of heavy metal complexes (HMCs), and single-step removal strategies have attracted increasing attention. Herein, we pioneered a waste-derived strategy using NdFeB waste (NFBW) to activate H 2 O 2 for establishing a heterogeneous Fenton-like system, achieving concurrent Cu-EDTA decomplexation and Cu capture. Remarkably, 99.10 % Cu-EDTA decomplexation and 96.84 % total Cu capture were synchronously achieved within 30 min. This one-step technology is effective over a wide pH range (2.0–9.5). Notably, this system demonstrated practical efficacy in treating rare-earth purification wastewater, achieving synchronous removal of heavy metals (Cu, Zn) and rare-earth elements (Yb, Ce) as mixed organic complexes with effluent meeting industrial discharge standards. Mechanistic investigations revealed that Cu-EDTA decomplexation originated from Fe(Ⅲ)-induced ligand substitution coupled with reactive oxygen species (·OH and ·O 2 - ) attack. The ≡Fe(Ⅱ)/≡Fe(Ⅲ)-mediated heterogeneous Fenton reaction synergized with homogeneous Fe(Ⅱ)/Fe(Ⅲ) cycling to generate ROSs, where the B-B bonds and Fe 0 in NFBW facilitated electron transfer for enhanced redox cycling. Possible pathways for the decomplexation of Cu-EDTA in this system are proposed. The 90.10 % TOC removal verified EDTA mineralization through stepwise degradation pathways. Liberated Cu(Ⅱ) was captured via multiple routes: surface reduction (Cu 0 ), precipitation (Cu(OH) 2 , Cu 2 (OH) 2 CO 3 ), and Fe(OH) 3 adsorption-flocculation. This work not only opens new avenues for Fenton-like treatment of HMC wastewater through a “waste-treats-waste” strategy but also provides new ideas for synergistic activation of H 2 O 2 by multivalent iron materials.
研究领域:
环境科学
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废水处理
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化学工程
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产品关联
DOI
高影响因子
WATER RESEARCH
·
2025
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IF 12.4
Delong Yu,Guoquan Zhang,Xiaoli Lv,Xiaochen Xu,Fenglin Yang
Achieving efficient NH 4 + -N degradation into harmless N 2 and simultaneous harvesting hydrogen energy is of great significance for protecting aquatic ecosystems and alleviating energy shortages. Herein, a photoelectrochemical-chlorine (PEC-Cl) system was developed aiming to selective converting ammonia to N 2 with simultaneous H 2 evolution in a wide pH range of 3–13. The Pt decorated black TiO 2 nanotube arrays (Pt/BTNAs) with sufficient oxygen vacancies defects and the enhanced PEC properties were synthesized as the bifunctional electrode. The parameters optimization illustrated high N 2 selectivity (88 %) and H 2 yield rate (67.5 μmol cm -2 h -1 ) at pH 9. The ClO • derived from the cross reactions between active chlorine and HO • plays a predominant role in oxidizing ammonia. More importantly, the Gibbs free energy calculation indicated that Pt decorating can also significantly promote the direct electrochemical ammonia oxidation reaction (AOR) on Pt/BTNAs anode. Under alkaline conditions (pH 9–13), the efficient removal and conversion of ammonia into N 2 in the PEC-Cl system was achieved primarily through the direct anodic AOR, with N 2 selectivity (89 %-93 %) and H 2 yield rate (60.9–68.6 μmol cm -2 h -1 ) comparable to those of the ClO • -mediated indirect AOR. This study presents a flexible method for treating high and medium-concentration NH 4 + -N and simultaneously producing H 2 through the synergistic PEC-Cl and direct electrochemical AOR processes, across a wide pH range.
研究领域:
环境科学
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材料科学
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化学工程
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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）