Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Tieliang Bai,Wei Chen,Runqing Zhang,Fuhao Yin,Mao Xu,Benxia Li
Coupling O 2 reduction and selective organic oxidation for photocatalytic coproduction of H 2 O 2 and value-added organic compounds (e.g., benzaldehyde) represents a dual-functional strategy to maximize solar energy utilization and economic benefits in chemical manufacturing. Employing water/organic biphasic systems for such reactions offers a sustainable solution to address the challenges inherent in conventional single-phase systems, such as energy-intensive product separation and uncontrolled secondary reactions. Herein, we rationally designed and synthesized an amphiphilic BiOBr/g-C 3 N 4 S-scheme heterojunction photocatalyst (labeled as BOB/PCN-A) composed of hierarchically structured BiOBr and porous g-C 3 N 4 , which can stably localize at the water/toluene biphasic interface. This unique feature enables the formation of a quasi-Pickering emulsion under continuous stirring during the photocatalytic process, facilitating the simultaneous production and in situ separation of H 2 O 2 in the aqueous phase and benzaldehyde in the organic phase. The S-scheme heterojunction enhances visible-light absorption, promotes efficient electron-hole separation, and preserves the strong redox potential of photogenerated charge carriers. Under simulated sunlight, the optimized BOB/PCN-A photocatalyst achieves remarkable production rates of 2.29 mmol g −1 h −1 for benzaldehyde and 1.77 mmol g −1 h −1 for H 2 O 2 , with a 100 % selectivity toward benzaldehyde. This study showcases a green photocatalytic system that integrates synthesis and separation processes, offering promising implications for sustainable solar-driven chemical manufacturing.
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LANGMUIR
·
2025
·
IF 3.9
Dan Wang,Qiang Le,Wang Zhang,Zhaodong Nan
Carbon nitride (g-C3N4, CN) is always used as a metal-free catalyst to activate peroxymonosulfate (PMS) without toxic metal ion leaching in solutions. However, it is still a challenge to enhance the catalytic activity for CN. Herein, sulfur (S)-doped g-C3N4 is synthesized by a facile method as named CNSx, where x represents the mass ratio of ammonium sulfate to melamine during the CNSx synthesis. Partial N atoms such as pyridinic N in CN were replaced by S atoms. CNS1.75 exhibited an excellent catalytic activity to degrade Rhodamine B (RhB) via PMS activation under the assistance of the visible light (Vis). The rate constant (k) increased about 9 and 7 times for CNS1.75/Vis/PMS than that of CNS1.75/PMS and CNS/Vis/PMS systems. Moreover, the k value is higher than that of some metal-doped CN as reported. The toxicity of RhB was effectively reduced after the degradation process with the total organic carbon (TOC) removal ratio 48% after 40 min. The RhB removal efficiency kept 95% after continuous operation for 12 h. The catalytic mechanism was proposed in which 1O2 was the dominant reactive oxygen species (ROS).
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高影响因子
BIODEGRADATION
·
2025
·Vol. 36
·期 4
·1-15
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IF 3.2
Shao Pengfei,Yao Jun,Li Miaomiao,Min Ning
Phthalate esters (PAEs) are widely used as plasticizers and beneficiation flotation agents in ore smelters, which are ubiquitously distributed emerging contaminants in the environment. The biodegradation of PAEs by degrading microbes is a promising method for their remediation. In this study, we isolated a novel PAE-degrading bacteria, Sinomonas sp. S2, from a contaminated area of a metal(loid) smelter in Guangxi Zhuang Autonomous Region, China. Strain S2 is capable of degrading short-chain PAEs, including dimethyl phthalate (DMP), diethyl phthalate (DEP), di-iso-butyl phthalate (DIBP) and di-n-butyl phthalate (DBP). Sinomonas sp. S2 can completely degrade DBP at concentrations of 400 mg·L −1 within 24 h. The degradation kinetics of PAEs followed the modified Gompertz model. Strain S2 demonstrated good environmental adaptability thriving at pH ranging from 5 to 9 and temperatures between 20 and 40 °C, indicated by its growth on DBP. The optimal pH and temperature for degradation were found to be 7 and 40 °C, respectively. Additionally, several metabolites of DBP were identified, including phthalic acid (PA), butyl acetate, ethyl propionate and methyl 2-methylbutyrate. The reconstructed degradation pathway of DBP may involve protocatechuic acid, β-carboxy-cis, cis-mucronate and γ-carboxy muconolactone, ultimately leading to the tricarboxylic acid (TCA). In a bioaugmentation experiment involving soil artificially contaminated with DBP, strain S2 could promote the degradation of DBP in soil. The results indicate that strain S2 had high degradation capacity and environmental tolerance, which had the potential to be applied in the bioremediation of DBP-contaminated environments.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Qin Jiao,Binchuan Gao,Li Zhang,Ruijie Chen,Lei Wang,Qiang Wang,Nengjie Feng,Hui Wan,Guofeng Guan,Mingjuan Han
The photocatalytic performance of graphitic carbon nitride (g-C 3 N 4 ) in the conversion of CO 2 to CH 3 OH is intrinsically constrained by its limited selectivity and activity. Herein, we developed a dual-modification strategy that integrates S doping into the g-C 3 N 4 (CN) skeleton and constructed a 2D/2D S-doped g-C 3 N 4 /Bi 2 MoO 6 Z-scheme heterojunction (SCN/BMO) via microwave-assisted synthesis. This strategy achieved sulfur doping through N-site substitution to modulate the electronic structure of CN, resulting in the formation of a 2D/2D SCN/BMO Z-scheme heterojunction. The optimized 0.3SCN/BMO photocatalyst achieved a methanol production rate of 6.19 μmol·g −1 ·h −1 with 99.15 % selectivity under solar irradiation, showing a 5.16-fold and 2.60-fold enhancement in catalytic activity compared to pristine g-C 3 N 4 and Bi 2 MoO 6 (BMO), respectively. Meanwhile, it demonstrated excellent photocatalytic and structural stability during the cycling tests. Systematic characterization analyses have revealed that the synergistic light-harvesting effect, optimized interfacial coupling, and efficient charge transport pathways within the 2D/2D 0.3SCN/BMO Z-scheme heterostructure collectively contribute to the significant enhancement in photocatalytic performance. Moreover, a feasible photocatalytic mechanism has been put forward by combining the outcomes of in-situ DRIFT spectroscopic analysis with DFT computational modeling. This research finding provides an innovative strategy for the development of highly efficient photocatalysts, which are specifically designed for the selective reduction conversion of CO 2 to CH 3 OH.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Haoruo Xu,Chenxi Huang,Weili Yu,Ningjie Fang,Yinghao Chu,Jinhui Li
The combined pollution toxicity of hexavalent chromium heavy metal (Cr(VI)) and antibiotics (such as ofloxacin, OFL) is much higher than that of a single pollutant, posing a serious challenge to the ecological environment. Photocatalytic technology can achieve the removal of both single pollutants and composite pollutants. It is urgent to develop catalysts with high carrier separation efficiency and photocatalytic degradation performance. In this work, we successfully prepared m-PDI/BiOI heterojunction catalysts (mPB-3) with tight contact interfaces using the continuous ion layer adsorption and reaction method, and applied them to the synergistic removal of OFL and Cr(VI). The results showed that mPB-3 exhibited a bidirectional enhancement effect. The degradation rate of OFL reached more than 99.5 % within 40 min, the corresponding reduction efficiency of Cr(Ⅵ) reached 63.7 % at pH = 9. Furthermore, the influence of different environmental factors on the degradation process have also been clarified, indicating that mPB-3 has good stability and adaptability. The system characterization results confirmed that a S-scheme heterojunction has been formed. This can accelerate the rapid migration of electrons from m-PDI to BiOI, achieving efficient charge separation, and ultimately enhancing the photocatalytic activity. Finally, the degradation intermediate products and degradation mechanism were analyzed. This study provides a feasible solution for the design of efficient photocatalytic materials and their application in the combined pollution treatment of OFL and Cr(VI). Environmental implication Cr(VI) and OFL coexisting in water bodies pose significant ecological risks due to their enhanced combined toxicity. Traditional treatment techniques often struggle to effectively address such complex pollution systems. This study demonstrates that the m-PDI/BiOI heterojunction photocatalyst can efficiently synergistically remove both contaminants under environmentally relevant conditions (e.g., pH = 9), providing a practical strategy to mitigate composite pollution challenges. The S-scheme charge separation mechanism offers insights for designing advanced catalysts to tackle emerging multi-pollutant threats in aquatic ecosystems, supporting sustainable water treatment solutions.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Jin Chen,Jiayu Lei,Jie Yan,Yuzhao Ma,Xiaofeng Yang,Yanjun Li
The establishment of a surface plasmon resonance (SPR) effect and an internal electric field (IEF) has been recognized as an effective technique for optimizing pollutant treatment in aquatic environments. Herein, we synthesized a novel 2D/2D Pt@BiOBr/Bi 2 WO 6 S-scheme heterojunction that establishes robust interfacial connections to enhance electron transport through minimized pathways, while simultaneously increasing active site availability. Subsequently, noble metal Pt was employed to modify the BiOBr/Bi 2 WO 6 composite material, thereby inducing SPR and broadening the light absorption range. Impressively, the optimized Pt@BiOBr/Bi 2 WO 6 demonstrates a significantly enhanced degradation efficiency for organic pollutants, primarily due to the synergistic effects of SPR and IEF. The degradation rate of tetracycline hydrochloride (TC-HCL) through the ternary heterojunction 2-PBB can achieve 100 % within 30 min under 500 W of visible light irradiation, showcasing impressive cyclic stability. Furthermore, the developed photocatalyst also demonstrated remarkable degradation efficiency for organic dyes such as Rhodamine B (RhB) and methyl orange (MO). This work demonstrates an original approach to the fabrication of Pt-modified S-scheme heterojunction photocatalysts with high effectiveness.
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EUROPEAN POLYMER JOURNAL
·
2025
·
IF 6.3
Hongjian Gu,Yinglin Hu,Kaiyuan Fan,Binggang Liu,Danhui Wang,Siyuan Dong,Xinbo Dong,Xiaotong Pan,Yuxi Pan,Ce Song,Cheng Liu,Xigao Jian
The development of high-performance polymers that simultaneously achieve high-temperature resistance and solution processability holds critical importance for advancing high-tech applications. This study demonstrates an innovative molecular design strategy through the synthesis of side-phenyl-modified anthracene-type bisphthalazinone monomer (D-BDHPZ) derived from cost-effective pyromellitic dianhydride (PMDA) and subsequent preparation of poly(aryl ether sulfone ketone)s incorporating both side-phenyl-modified anthracene-type bisphthalazinone and ether-type bisphthalazinone (O-BDHPZ) moieties (PODPESKs). The resulting PODPESKs exhibit excellent thermal properties with glass transition temperatures ( T g s) ranging from 326 to 375 ℃ and thermal stability exceeding 460 ℃, while maintaining room-temperature solubility in N -Methylpyrrolidone (NMP) and tetrachloroethane. This unique combination enables solution processing of high-temperature resistant resins, allowing fabrication of high-performance films via solution casting. Comprehensive characterization reveals outstanding film properties including a tensile strength of 79.6–91.0 MPa, dielectric constants of 2.85–3.20, water absorption of 0.83–1.45 %, water contact angles of 82.6–93.6°, optical transmittance up to 83 % at 800 nm, and retention of 56.0 % storage modulus at 300 ℃. This work establishes a novel paradigm for designing solution-processable high-performance polymers with significant potential for cutting-edge applications in aerospace, electronics, and energy sectors.
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JOURNAL OF FLUORESCENCE
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2025
·
IF 3.1
Yao Jie,Chen Hongfang,Yang Xiaohua,Iqbal Muzaffar,Bian Wei
Mercury ions (Hg 2+ ) are categorized as environmental pollutants, which distributed in water, soil, and food systems due to environmental contamination. Hence, designing a sensitive assay for the convenient determination of Hg 2+ is of great importance. Herein, S and O-doped graphite phase nitrogenized carbon quantum dots (S, O-C 3 N 4 QDs) was encapsulated within a europium -based metal-organic framework (Eu-MOF) to construct a novel ratiometric fluorescent nanoprobe for the quantitative detection of Hg 2+ . The native emission of S, O-C 3 N 4 QDs at 445 nm is used as a response signal, while Eu-MOF with fluorescence offers a reference signal at 619 nm. Hg 2+ exhibits high affinity for the surface functional groups of S/O-C 3 N 4 QDs, forming non-fluorescent chelation complexes that induce static quenching. This results in significant attenuation of the fluorescence intensity at 445 nm, while the emission at 619 nm remains invariant. A ratiometric fluorescence sensing platform was established based on the intensity ratio (F 445 /F 619 ) for the selective detection of Hg 2+ . The linear range of S, O-C 3 N 4 QDs/Eu-MOF of Hg 2+ was 0.25–35 µM and with a detection limit of 4.3 nM. The satisfying results demonstrate the effectiveness of the developed S, O-C 3 N 4 QDs/Eu-MOF-based fluorescence probe for Hg 2+ detection, highlighting its promising potential for environmental monitoring applications.
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高影响因子
Journal of Materials Chemistry A
·
2024
·
IF 10.7
Zhengjie Su,Xinru Wu,Dong-Hau Kuo,Baoqian Yang,Binghong Wu,Longyan Chen,Pengkun Zhang,Jinguo Lin,Dongfang Lu,Xiaoyun Chen
Herein, an Ag/S co-doped Bi2O3-based sulfur oxide catalyst was prepared via a facile green method. The Ag/S–Bi2O3 catalyst with suitable Ag/S doping demonstrated super visible light photocatalytic hydrogen evolution (PHE) at 7.52 mmol g−1 h−1, with an apparent quantum efficiency (AQE) of 8.67% at 420 nm. Ag/S co-doping can adjust the energy band structure of an oxidation type Bi2O3 catalyst, converting it into a visible light hydrogen production catalyst suitable for hydrogen production. Sulfur doping adjusts the content of oxygen vacancies to enhance the surface active sites, and the introduction of noble metal silver endows the catalyst with more excellent electrical conductivity and electron trapping ability. Thus, Bi2O3 with Ag/S co-doping produced a suitable energy band structure, enhanced the content of oxygen vacancies and the number of surface active sites, and endowed the catalyst with excellent electrical conductivity and electron trapping ability, significantly producing catalysts with excellent visible light PHE activity. Furthermore, Ag/S–Bi2O3-3 exhibited super visible light PHE activity and excellent stability and persistence and is expected to play a potential role in the field of PHE reactions (PHERs).
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FUEL
·
2024
·
IF 6.7
Wenting Chen,Xinwei Zhao,Qi Zeng,Lili Liu,Pengju Yang,Shupeng Guo,Juzhi Leng,Min Zhong,Wei Hong,Lin Zhang
Combining the advantages of multiple strategies including morphology control, atom doping, and defect construction, the photocatalytic hydrogen evolution reaction (HER) performance of graphitic carbon nitride (g-C 3 N 4 ) may be boosted significantly. Herein, holey ultra-thin g-C 3 N 4 nanosheets (CNS-x, x = H, O, N) modified with structural vacancies and sulfur (S) dopant are synthesized through a straightforward method involving the pyrolysis of thiocyanuric acid under various gas atmospheres. The textural properties, type and concentration of structural defect, and S doping level are significantly influenced by the gas atmosphere. Remarkably, CNS-H with C, N dual defects and S-dopant exhibits the HER rate of 46.59 mmol·g −1 ·h −1 , which is 16.68 times higher than that of bulk g-C 3 N 4 . The corresponding apparent quantum yields are 17.24 % at 420 nm and 1.90 % at 520 nm. The enhanced HER performance of CNS-H can be attributed to the combined effect of improved charge separation, extended photoabsorption, and optimized properties of the platinum cocatalyst.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiarun Cheng,Chaojie Lyu,Hongming Chen,Dongsheng Geng,Jinlong Zheng
Elucidating the mechanism of metal-support interface domain regulation is crucial for designing efficient fuel cell electrocatalysts. Herein, we propose an emerging strategy to enhance oxygen reduction reaction (ORR) activity and selectivity by regulating the Lewis alkalinity of carbon support to adjust the Lewis acidity of metal sites. The experimental results and density functional theory (DFT) simulations show that the introduction of N/S atoms into the carbon support structure will break the charge balance of the carbon skeleton and effectively regulate the charge distribution in the Pt-carbon interface domain, thus promoting the oxidation of the Lewis acid Pt atoms to a higher valence state Pt x+ , so as to optimize the adsorption energy of oxygen-containing intermediates. Moreover, Bader charge analysis also verifies that N,S-HMCS, as a Lewis base, can receive more electrons from the Pt sites of Lewis acid, and the electron loss at Pt sites caused by N,S-HMCS strengthens interfacial electron effect. Meanwhile the strong electron adsorption ability of N/S atoms causes the d-band center of Pt atom orbital to shift upward to the Fermi level, which strengthens the binding of metal Lewis acid Pt sites with *OOH intermediates, and improves the 4-electron transfer mechanism. This research reveals the direct role of Lewis acid sites in ORR of fuel cell cathode, and provides a feasible way to guide the design of electrocatalysts with Lewis acid/base double centers.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Lele Wei,Ru Song,Jiarui Song,Yaping Li,Yina Nie,Lin Liu,Jun Wan
To achieve efficient artificial photosynthesis of hydrogen production coupled with benzyl alcohol oxidation, it is imperative to address the key kinetic bottlenecks that limit photocatalysis performance comprehensively. Herein, we synthesized a D–A conjugated polymer pyrene-thienothiophene (PyTT) containing thiophene rings acceptor unit via a direct C–H arylation reaction. Subsequently, an innovative ZCS/PyTT inorganic/organic S-scheme heterojunction was successfully constructed by synthesizing Zn 0.5 Cd 0.5 S (ZCS) nanocrystals in situ on the surface of PyTT nanosheets. By enabling this design, the optimized ZCS/5PyTT heterojunction exhibits significantly enhanced rates of H 2 and benzaldehyde (BAD) production at 4.52 and 4.12mmol g −1 h −1 respectively under only two sun light intensity, which are 2.69 and 2.80 times higher than pristine ZCS. The outstanding photocatalytic performance can be attributed to the efficient charge separation and transfer efficiency, enhanced light absorption capability, as well as increased concentration of active carriers in reaction. Particularly, the interface charge transfer mechanism involved in ZCS/PyTT S-scheme heterojunction is comprehensively investigated through in situ irradiated X-ray photoelectron spectroscopy (XPS) and photo-irradiated Kelvin probe force microscopy (KPFM) analyses. This study provides a protocol for preparing specific inorganic/organic S-scheme heterojunction photocatalysts aimed at achieving efficient cooperative photo-redox coupling of H 2 production and organic transformations.
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