CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Cai-Yun Zhang,Chen-Yang Wang,En-Zhu Zhao,Guowei Yu,Hui-Ling Deng,Rui Huang,Zhao-Yun Wang,Pu Hu,Min Yan,Zhitian Liu
Lithium‑sulfur batteries demonstrate substantial promises for evolving into next-generation energy storage systems, but sluggish kinetics of LiPSs conversion and poor interfacial stability at the cathode-electrolyte interface remain critical challenges. Biowaste carbon as hosts is a cost-effective strategy to improve the electrical conductivity of Li-S batteries. However, limited polar sites in raw biowaste carbon restrict the capacity to anchor LiPSs. Herein, we propose a bio-derived hybrid host (PANI@GC) synthesized from waste grapefruit peels and polyaniline to address the rate-determining steps in sulfur electrochemistry. The grapefruit-derived carbon establishes an excellent conductive network that enables rapid electron transfer, while the PANI-integrated numerous polar sites (aromatic amine groups, conjugated π-π stacking) create a catalytically active interface to anchor and accelerate LiPSs conversion kinetics. Due to the conductive-catalytic network, the PANI@GC/S cathode delivers exceptional performance of 1190 mAh g −1 at 0.2C and maintains 779.8 mAh g −1 under stringent conditions (5 mg cm −2 sulfur loading, 8 μL mg −1 E/S ratio). Remarkably, the catalytic interface minimizes capacity fading, exhibiting only 28.9 mAh g −1 loss after 7-day rest, compared to Pure S (152.83 mAh g −1 ). This research pioneers a sustainable strategy to engineer conductive-catalytic networks at cathode-electrolyte interfaces, providing fundamental insights into biowaste utilization for high-energy-density battery systems.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jin Liang,Tian Lei,YaXi Zhang,Ye Yuan,Guang Yang,Li Zhang
Metal–organic frameworks (MOFs) have gained widespread recognition as versatile catalyst precursors owing to their unique structural merits and straightforward synthetic accessibility. Herein, the UiO-66(Ce)/ZIF-67 composite MOF precursor was constructed through a hybridization strategy, and subsequently transformed into a nonprecious metal sulfide catalyst (denoted as CeS/CoSx) employing hydrothermal sulfidation. Benefiting from the CeS/CoSx architecturally engineered hollow polyhedral nanocage structure and strong electronic interaction between CeS and CoSx, the composite catalyst demonstrates significantly accelerated electron transfer kinetics and outstanding catalytic activity. In 1.0 M KOH, CeS/CoSx only necessitates an overpotential of 143 mV to achieve a current density of 10 mA cm–2 for the hydrogen evolution reaction (HER). Regarding the oxygen evolution reaction (OER), overpotentials of 250 and 291 mV were required to attain current densities of 10 and 50 mA cm–2, respectively. Remarkably, the assembled CeS/CoSx||CeS/CoSx two-electrode overall water splitting system requires only 1.60 V to achieve a current density of 10 mA cm–2. Moreover, during the 40 h continuous electrolysis test, the potential fluctuation remained within 1%. This study provides an effective strategy for designing high-performance, dual-MOF-derived sulfide composite bifunctional electrocatalysts.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Ying Zhang,Jiaqi Yang,Kai Wei,Yulu Xue,Liying Cai,Huarui Han,Changchang Ma,Sheng Feng
The thoughtful construction of highly efficient, tiered photocatalysts has become a focal point of interest. Herein, in this context, the step-scheme (S-scheme) AlBi-MOF/MgNiAl-LDH heterojunction is specifically engineered to facilitate the photocatalytic reduction of CO 2 . The CO 2 photocatalytic reduction experiments of three samples, AlBi-MOF, MgNiAl-LDH and AlBi-MOF/MgNiAl-LDH, were conducted for 5 h using triethanolamine as the sacrificial agent, the optimized sample demonstrates significantly enhanced CO 2 photoreduction efficiency compared to the control without treatment, i.e., AlBi-MOF and MgNiAl-LDH. The optimized AlBi-MOF/MgNiAl-LDH exhibited a CO 2 reduction rate of 86.84 μmol g −1 h −1 , which was 25.85 times higher than that of MgNiAl-LDH alone and 20.15 times higher than that of AlBi-MOF alone. The improved photocatalytic efficiency is mainly attributed to the decreased recombination of photogenerated charge carriers, facilitated by S-scheme heterojunction. Additionally, the large specific surface areas and abundant active sites also contribute to the improvement. Meanwhile, the S-scheme photocarrier transfer mechanism was verified by in situ X-ray photoelectron spectrum (XPS) and femtosecond transient absorption spectroscopy (fs-TA). This research outlines an effective methodological for advancing highly efficient heterojunction photocatalysts dedicated to the transformation of solar energy into fuel.
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CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Zhenhai Liu,Lei Duan
Iron sulfide nanoparticles (Nano-FeS) have shown great potential for in situ remediation of heavy metal and metalloid contamination from groundwater. However, limitations on mass transfer and efficacy of nano-FeS in the subsurface pose significant challenge. Herein, a reactive and efficient nano-FeS coating was developed in situ for the stabilization of metal(loid)s from groundwater. Alternate injection of FeSO 4 and Na 2 S can realize nano-FeS coating on sand grains with negligible changes in porosity, and the formation was dominated by growth and agglomeration process. Application scenarios for this nano-FeS coating include permeable reaction walls designed for preventive measures and in situ reaction zones that have experienced contamination. For the first scenario, the preformed nano-coating effectively sequesters As(III) through surface complexation and precipitation, and sequesters Cr(VI) through surface adsorption and reduction/precipitation. The retardation factor of As(III) and Cr(III) increased by 5.9 and 8.3 times, respectively, relative to the unamended sand. For the second scenario, we used alternate injection of FeSO 4 + heavy metal (Cd, Pb, and Cu) and Na 2 S to simulate the in situ immobilization of contaminants from real groundwater. The results showed that the alternating injection of Fe 2+ and HS − significantly enhanced the immobilization of heavy metals through both adsorption and direct interaction between heavy metals and HS − , with minimal detachment from the quartz sands. Overall, the findings highlight that in situ formation of nano-FeS coating as aquifer materials has significant potential as a cost-effective and straightforward groundwater remediation technology under environmentally relevant conditions.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
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IF 21.1
Wei Li,Lei Zhang,Kajia Wei,Xu Yin,Hongwei Zhu,Siyuan Cao,Qi Zhang,Weiqing Han,Xiaoyuan Zhang
Appropriate tuning of the nonradical pathway in the heterogeneous Fenton process is important for enhancing its anti-interference ability in wastewater treatment. However, the difficulty in O–H bond cleavage of H 2 O 2 hinders its oxidation routine for nonradical production. Herein, a charge-regulating linkage M–S–Fe (M = Co, Ni, Zn) with S-bridged asymmetric dual-metal centers was established on multiwall carbon nanotubes, i.e., M-FeS 2 /MWCNT, to effectively tune the H 2 O 2 nonradical pathway. The high-charge-positive M centers in M–S–Fe structure significantly reduced the H 2 O 2 oxidation energy barrier by 72%, thereby enhancing the 1 O 2 generation and model pollutant removal efficiency by 1.72 and ~24 times, respectively, compare to the sole-Fe center catalyst. Moreover, the S-bridged asymmetric dual-metal centers catalysts showed excellent complex pollutant adaptability (> 80% organic decontamination in phenolic, antibiotic and dye mixed matrices), ion-resistance and stability. This work offers a new strategy for constructing a charge-asymmetry dual-metallic-center for tunable nonradical pathways in H 2 O 2 activation.
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JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Penghui Guo,Zhaoshuang Li,Jinlin Luo,Xu Xu,He Liu,Yini Cao,Yuanfeng Wei,Zhexuan Liu,Yan Qing,Yiqiang Wu
Cadmium (Cd) and lead (Pb) contaminate aquatic environments and soil systems, threatening ecosystems and human health via bioaccumulation, while current remediation materials are often limited by insufficient adsorption capacity and restriction to a single medium. To address these challenges, a novel almond shell biochar co-functionalized with L -cysteine ( L -Cys) and selenium (Se) was prepared ( L -SeBC). This synergistic integration endows L -SeBC with abundant active sites for effective remediation. Adsorption thermodynamics demonstrated the maximum of 147.7 mg/g (Cd 2 + ) and 203.4 mg/g (Pb 2+ ). Density functional theory (DFT) calculations indicated that the enhanced adsorption occurred via chemisorption-physisorption synergy. In soil remediation experiments (5 % w/w L -SeBC application), the available Cd and Pb decreased by 45.1 % and 52.1 %. The addition of L -SeBC promoted soybean growth in contaminated soil, and reduced Cd and Pb contents in leaves (by 55.6 % and 68.9 %) and roots (by 28.6 % and 29.0 %). Furthermore, L -SeBC increased the activities of plant enzymes and soil enzymes, enhancing nutrient cycling and stress resistance of plants. Microbial analysis revealed that L -SeBC reshaped the soil microbiome by enriching functional genera (e.g., Pseudomonas spp.). Overall, the waste-derived, multifunctional adsorbent L -SeBC is cost-effective and eco-friendly, enables multi-scenario remediation, and exhibits great practical potential in sustainable pollution control.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Ye Wang,Yulong Ying,Lvlv Ji,Wei Li,Yuan Wei,Tao Wang,Sheng Wang
The concurrent generation of clean hydrogen fuel and value-added organic compounds through photocatalysis offers a promising pathway for solar-to-chemical conversion. Here, we present a ternary Au-mediated S-scheme heterostructure comprising hollow TiO 2 nanobowls (HTNB), vertically aligned ZnIn 2 S 4 (ZIS) nanosheets, and interfacially confined Au nanoparticles. The hollow TiO 2 scaffold, fabricated via a green and scalable electrospray method, shortens carrier diffusion paths, while the direct S-scheme junction preserves strong redox potentials. Embedded Au nanoparticles at the HTNB/ZIS interface act as directional electron mediators, enabling cascade charge transfer (TiO 2 → Au → ZIS) and suppressing recombination. The optimized HTNB/Au@ZIS achieves a remarkable H 2 evolution rate of 42.27 mmol g −1 h −1 with an apparent quantum efficiency of 59.5 % at 380 nm under simulated solar light, among the highest reported for TiO 2 /ZIS systems. In a sacrificial-free system, it simultaneously produces 4.48 mmol g −1 h −1 H 2 and 4.05 mmol g −1 h −1 N-benzylidenebenzylamine with > 99 % selectivity. Comprehensive spectroscopic, electrochemical, and EPR analyses confirm the Au-mediated S-scheme charge-transfer mechanism. This work demonstrates a generalizable interfacial-engineering strategy for coupling oxidative and reductive photocatalysis, advancing the design of efficient dual-functional photocatalysts for solar-to-chemical energy conversion.
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Materials Today Communications
·
2025
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IF 4.5
Chengzhen Fu,Hailu Wang,Hongxing Zhan,Yuanbing Li,Shujing Li,Bo Yin
Reducing the Ca/Si molar ratio is critical for optimizing calcium silicate hydrate (C–S–H) materials and enabling the recycling of silicon-rich waste. However, achieving high-performance crystalline C–S–H at Ca/Si < 0.83 remains challenging. This study proposes and systematically investigates a dual-silicon-source strategy, employing both active and inert silicon sources to regulate hydrothermal synthesis. At Ca/Si = 0.6, experimental results demonstrate that increasing the active silicon source content from 0 % to 60 % enhances tobermorite crystallinity by 275 %, decreases thermal conductivity by 26 %, and improves compressive strength by 7.30 MPa. The optimal performance was obtained at a reactive silicon-to-calcium molar ratio of 1.0. These findings confirm that this strategy significantly enhances C–S–H crystallinity and material performance. Mechanistically, the higher reactivity of the active silicon source drives competitive calcium consumption, facilitating the formation of long-chain crystalline C–S–H. This approach demonstrates a scalable pathway for synthesizing high-performance C–S–H under low Ca/Si conditions, offering promising applications in optimizing C–S–H-based materials and the recycling of silicon-rich waste.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Yaqian Dong,Zhi Fang,Deliu Ou,Qing Shi,Yu Ma,Weiyou Yang,Bin Tang,Qiao Liu
Constructing inexpensive, efficient, and stable pH-universal oxygen reduction electrocatalysts with controlled distribution of active species is of great importance for the exploration of green energy conversion devices. Herein, we demonstrated the rational preparation of S-modified Fe–N–C nanosheet catalysts with hierarchical porous architecture, large specific surface area (up to 1471 m 2 g −1 ) and controlled S doping (up to 12.3 at.%) by the co-pyrolysis of cysteine, FeCl 3 with Zn-mediated MgO template. Merited from rich and accessible active sites, the catalysts display outstanding oxygen reduction reaction (ORR) activity in terms of very small E j3 (potential@3 mA cm −2 , 0.87 V in 0.1 M KOH, 0.66 V in 0.1 M PBS (pH7.4) and 0.64 V in 0.5 M H 2 SO 4 ) and overwhelming diffusion-limited current density (9.8, 6.1, 10.3 mA cm −2 in alkaline, neutral, acidic media, respectively), along with extremely respectable stability (∼90% activity retention for 53200, 26728, 43200 s in alkaline, neutral, acidic media, respectively), which underscore comparable or even better overall performance than commercial Pt/C and advanced pH-universal ORR catalysts ever reported. The as-assembled primary alkaline zinc–air battery delivers considerately large peak power density of 205 mW cm −2 and energy density up to 990.6 Wh kg Zn −1 at 10 mA cm −2 (115 mW cm −2 and 676.7 Wh kg Zn −1 for Pt/C-based battery), implying its highly promising application in practical energy conversion devices.
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MATERIALS CHEMISTRY AND PHYSICS
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2025
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IF 4.7
Xiaoxu Cui,Zherui Wan,Zhonghao Li,Fengxia Wang,Pengshuai Wei,Guang Yang
Herein, intelligent N, S-doped fluorescent carbon dots (N, S-CDs) were constructed by using l -cysteine and carboxymethyl cellulose (CMC) polymer as precursors through a one-step hydrothermal method. The designed N, S-CDs displayed strong fluorescence (FL) emission with a FL quantum yield of 44.48 % and could be utilized for the quantitative tracing of TCs and Al 3+ via the “On-OFF-ON” FL transition with wide linear detection range (1.66–104.5 μM for TCH, 1.66–163.2 μM for OTC, 1.66–69.5 μM for DOX and 33–104.3 μM for Al 3+ ). The detection limits (LODs) of TCH, OTC, DOX and Al 3+ were calculated to be 53.02 nM, 95.61 nM, 41.87 nM and 57.69 nM, respectively. On the basis of the FL “On-OFF-ON” strategy, multiple logical gate operations including “NOR” and “INHIBIT”, were constructed successfully. Additionally, N, S-CDs uploaded to hydrogen bars were utilized for the recognition of TCs and Al 3+ in a portable manner, which revealed great application potential in the field of anti-counterfeiting and encryption.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
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IF 9.4
Jinhong Bi,Zhangtong Zhang,Jinjin Tian,Guocheng Huang
Tetracycline (TC) antibiotics, extensively utilized in livestock farming and aquaculture, pose significant environmental challenges. Photocatalysis, leveraging renewable sunlight and reusable photocatalysts, offers a promising avenue for mitigating TC pollution. However, identifying robust photocatalysts remains a formidable challenge. This study introduces a novel hollow-flower-ball-like nanoheterojunction composed of a nitrogen-rich covalent organic framework (N-COF) coupled with BiOBr (BOB), a semiconductor with a higher Fermi level. The synthesized N-COF/BOB S-scheme nanoheterojunction features an expanded contact interface, strengthened chemical bonding, and unique band topologies. The N-COF/BOB composites showcased exceptional TC degradation performance, achieving an 81.2% removal of 60 mg/L TC within 2 h, markedly surpassing the individual efficiencies of N-COF and BOB by factors of 3.80 and 5.96, respectively. Furthermore, the total organic carbon (TOC) removal efficiency highlights a superior mineralization capacity in the N-COF/BOB composite compared to the individual components, N-COF and BOB. The toxicity assessment revealed that the degradation intermediates possess diminished environmental toxicity. This enhanced performance is ascribed to the robust S-scheme nanoheterojunction structure, which promotes efficient photoinduced electron transfer from BOB to N-COF. This process also augments the separation of photogenerated charge carriers, resulting in an increased yield of superoxide radicals (∙O 2 − ) and hydroxyl radicals (∙OH). These reactive species significantly contribute to the degradation and mineralization of TC. Consequently, this study introduces a sustainable approach for addressing emerging antibiotic contaminants, employing COF-based photocatalysts.
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International Journal of Minerals Metallurgy and Materials
·
2025
·Vol. 33
·期 1
·315-321
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IF 7.2
He Shengzhi,Sun Chunwen
Heteroatom-doped carbon is considered a promising alternative to commercial Pt/C as an efficient catalyst for the oxygen reduction reaction (ORR). This study presents the synthesis of iron-loaded, sulfur and nitrogen co-doped carbon (Fe/SNC) via in situ incorporation of 2-aminothiazole molecules into zeolitic imidazolate framework-8 (ZIF-8) through coordination between metal ions and organic ligands. Sulfur and nitrogen doping in carbon supports effectively modulates the electronic structure of the catalyst, increases the Brunauer–Emmett–Teller surface area, and exposes more Fe–N x active centers. Fe-loaded, S and N co-doped carbon with Fe/S molar ratio of 1:10 (Fe/SNC-10) exhibits a half-wave potential of 0.902 V vs. RHE. After 5000 cycles of cyclic voltammetry, its half-wave potential decreases by only 20 mV vs. RHE, indicating excellent stability. Due to sulfur’s lower electronegativity, the electronic structure of the Fe–N x active center is modulated. Additionally, the larger atomic radius of sulfur introduces defects into the carbon support. As a result, Fe/SNC-10 demonstrates superior ORR activity and stability in alkaline solution compared with Fe-loaded N-doped carbon (Fe/NC). Furthermore, the zinc–air battery assembled with the Fe/SNC-10 catalyst shows enhanced performance relative to those assembled with Fe/NC and Pt/C catalysts. This work offers a novel design strategy for advanced energy storage and conversion applications.
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