MICROCHEMICAL JOURNAL
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2026
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IF 5.2
Shuangyan Zhang,Chun Hu,Qihui Wei,Xiangbing Ding,Meixiu Pan,Yuchen Zhang,Huiling Zhang,Yunjun Mei
Coffee grounds are converted to magnetic biochar via one-step co-ball milling. • Cu(II) uptake increases by ∼66% with rapid magnetic separation. • Oxygen-containing groups and Fe 3 O 4 synergistically drive adsorption. • Over 71% capacity is retained after five cycles. The increasing prominence of Cu(II) pollution in water bodies has driven the development of efficient and easily recoverable adsorbents. In this study, M-CBC was prepared from waste coffee grounds via pyrolysis and ball milling. Ball milling significantly increased the specific surface area and introduced abundant oxygen-containing functional groups. The loaded Fe 3 O 4 provided favorable superparamagnetism (saturation magnetization: 8.87 emu/g), enabling rapid magnetic separation. Batch adsorption experiments showed that under optimal conditions (pH 5.0, dosage 0.8 g/L, time 180 min), the actual adsorption capacity for Cu(II) reached 23.54 ± 0.23 mg/g, representing an approximately 66% enhancement compared to unmodified biochar. The adsorption process followed the pseudo-second-order kinetic model and the Langmuir isotherm model, with a theoretical maximum adsorption capacity of 49.06 ± 1.36 mg/g at 25 °C, suggesting predominantly monolayer adsorption behavior on relatively homogeneous active sites. Thermodynamic analysis revealed that the adsorption process exhibited spontaneous and temperature-dependent characteristics, indicating the possible coexistence of multiple adsorption interactions. After five consecutive adsorption–desorption cycles, M-CBC retained 71.4% of its initial capacity, demonstrating excellent regeneration stability. Mechanistic analysis revealed that surface complexation with oxygen-containing groups played a dominant role, while the redox activity of Fe 3 O 4 provided synergistic enhancement. The combined effects of ball milling and Fe 3 O 4 loading effectively improved the adsorption performance, magnetic recoverability, and structural stability of the biochar. This work offers a resource-efficient approach to valorize waste coffee grounds and highlights the promising potential of M-CBC for treating Cu(II)-containing industrial wastewater due to its high efficiency and easy recoverability. Download: Download high-res image (142KB) Download: Download full-size image
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高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2026
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IF 3.5
Dongyang Liu,Liang Zhao,Yuen Bai,Jianxin Zhang,Jingjing Wang,Jiaojiao Wang,Haifeng Li,Jinsen Gao,Chunming Xu
Hierarchical HZSM-5 with integrated micro–mesopore structure is promising for boosting light olefin yield in light paraffin catalytic cracking, yet conventional alkali etching creates disordered large mesopores and rough crystal surfaces that degrade light olefin selectivity. Herein, this work adopts NaHCO 3 –TPAOH composite alkali treatment and pos-surface silanization treatment were used to regulate the micro-mesopore spatial distribution of hierarchical HZSM-5, for investigating the re-distribute of the hierarchical HZSM-5 and the effects of pore structure and its spatial arrangement on product selectivity. It was found TPA + in composite alkali system possesses large steric hindrance, which inhibits excessive local OH - corrosion, and avoids the formation of irregular large defective mesopores. On the optimized catalyst, the selectivity of light olefins is elevated by 8.7%. After surface silanization of zeolite, precisely passivates external acidic sites without blocking internal micropore channels, concentrating mesopores inside the zeolite framework. This structure greatly promotes the monomolecular cracking pathway of alkanes and achieves an improvement in ethylene production. This study clarifies the regulatory mechanism of spatially differentiated mesopores in HZSM-5 catalysts on the n-hexane catalytic pyrolysis reaction and their modulation effect on light olefin selectivity. It deepens the fundamental understanding of the structure-performance correlation of hierarchical porous zeolites and provides reliable guidance for the rational design and targeted fabrication of high-efficiency pyrolysis catalysts. Download: Download high-res image (254KB) Download: Download full-size image
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Journal of Environmental Chemical Engineering
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2026
·Vol. 14
·期 6
·124968
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IF 7.5
Zihan Liu,Junjie Zhang,Xiong Zhang,Jingai Shao,Shihong Zhang,Hanping Chen,Haiping Yang
Biomass-derived N-doped porous carbons are promising adsorbents for CO 2 capture because of their tunable pore structures and nitrogen-containing surface groups. Pyrolysis temperature is known to strongly affect their physicochemical properties, yet its role in regulating CO 2 adsorption, particularly diffusion behavior, remains unclear. Herein, flower-like N-doped biochars were fabricated from a biomass/ZIF-8 composite precursor via a solvothermal-assisted pyrolysis route. By integrating thermogravimetric kinetic/thermodynamic analysis, multiscale structural and surface chemical characterizations, and adsorption kinetic modeling, the relationship between pyrolysis temperature, biochar structural evolution, and CO 2 adsorption behavior was systematically examined. The results show that pyrolysis temperature directs the conversion of the composite precursor by regulating framework degradation, Zn-derived pore-forming reactions, carbon matrix reconstruction, and nitrogen-species evolution. The CO 2 uptake increased markedly from 39 mg/g for the sample prepared at 500 °C to a maximum of 134 mg/g for the sample prepared at 900 °C, owing to the more favorable combination of developed microporosity and retained nitrogen functionalities. Further kinetic analysis revealed that CO 2 adsorption involved external diffusion, intraparticle diffusion, and near-equilibrium adsorption stages. The adsorption kinetics were closely associated with the temperature-regulated evolution of surface accessibility, nitrogen functionalities, and pore structures. This study provides a process-level understanding of how pyrolysis temperature tailors N-doped biochar structures and their CO 2 adsorption behavior, offering guidance for the design of efficient biomass-derived carbon adsorbents.
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DESALINATION
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2026
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IF 9.9
Shen Zhang,Wencai Cheng,Junwen Tan,Benyao Yu,Tianjun Li,Congcong Ding,Xirui Lu,Jun Wen,Hao Li
A process for efficient enrichment of uranium from seawater on fiber was designed. • Seawater uranium extraction fiber after real sea trial was used in the study. • Seawater uranium extraction fiber after repeated use was treated by microwave pyrolysis. • The uranium in the solution was concentrated and purified by ion exchange method. • Lay the foundation for the closed loop of seawater uranium extraction project Developing an efficient process suitable for the treatment of amidoxime-functionalized fibers after multi-cycles using and the enrichment of uranium is crucial for the closed-loop of uranium extraction from seawater. The enrichment process is divided into four major steps, which are microwave pyrolysis, acid leaching of uranium-containing ash, ion exchange and chemical precipitation. A total of 9.14 g of uranium-containing ash was obtained by microwave pyrolysis of 100 g of fiber at 800 °C. Uranium in uranium-containing ash exists in the form of uranium oxide dominated by UO 3 . Then, the uranium-containing ash after pyrolysis was leached with 1 M sulfuric acid solution, and 97.12% uranium could be leached. Through high resolution mass spectrometry and simulation calculation, it was found that uranium in the leaching solution mainly existed in the form of [UO 2 (SO 4 ) 3 ] 4− anionic complex. D201 resin was used to exchange the uranium in the acid leaching solution. The enrichment efficiency of uranium was 98.22%, and the distribution ratio of uranium was about 55.07. Finally, ammonia was used to precipitate uranium, and the precipitation efficiency was 99.43%, and 346.51 mg of uranium compound was obtained. The uranium enrichment efficiency of the whole process is about 94.86%. The mass fraction of uranium in the uranium compound was about 28.3%. It exists in the form of hexavalent uranium oxide. This study contributes to the realization of closed-loop and industrialization in the field of seawater uranium extraction. Download: Download high-res image (266KB) Download: Download full-size image
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高影响因子
BIOMASS & BIOENERGY
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2026
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IF 7
Fang Xu,Mingjun Liu,Wenxiao Wang,Mohan Zhao,Rui Zhang,Shuang Wu,Shuo Pan,Jingru Bai,Qing Wang
The synergistic mechanism of lignin and PS was investigated at multiple scales. • The addition of PS effectively improved the quality of bio-oil derived from lignin. • The addition of PS promoted C-C bond cleavage while suppressing C-O bond cleavage. • The synergistic effect of lignin and PS significantly inhibited secondary reactions. The co-pyrolysis of lignin with waste plastics serves as an effective approach for both upgrading lignin-derived oil and mitigating white pollution. In this study, the synergistic mechanism of lignin and polystyrene (PS) co-pyrolysis was comprehensively explored through a combination of experiments, ReaxFF-MD simulations, and kinetic analysis. TG analysis revealed a notable interaction between lignin and PS during co-pyrolysis, which facilitated the release of volatiles. Both Py-GC/MS and ReaxFF-MD findings demonstrated that the introduction of PS significantly improved oil quality, facilitating the production of non-oxygenated compounds. ReaxFF-MD simulations further elucidated the role of synergy in oil production and chemical bond evolution. The findings indicated that PS donated abundant active radicals that promoted the rupture of C-C bonds while suppressing the rupture of C-O bonds, guiding the reaction pathway toward the formation of oil, especially non-oxygenated oil. Moreover, PS further stabilized oil through radical stabilization effects, suppressing the secondary reactions. Kinetic analysis indicated that lignin and PS displayed positive synergy during co-pyrolysis, greatly reducing the apparent activation energy. This study provides theoretical guidance for the preparation of high quality oil via lignin/plastics co-pyrolysis.
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2025
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IF 1.6
Feng Zihao,Wang Yang,Ren Qi,Yi Cui,Li Yang,Du Yanjun,Wang Changfu,Wang Yun
Effective U(VI) separation from uranium wastewater is crucial for nuclear energy's sustainable growth. A magnetic, cauliflower-shaped magnesium-iron bimetallic oxide loaded biochar (MFBC) was fabricated via a green hydrothermal co-pyrolysis. Its U(VI) adsorption process was pH-dependent and fitting Langmuir–Freundlich and pseudo-second-order models, the theoretical maximum adsorption capacity of U(VI) by MFBC peaked at 1354.8 mg·g −1 (pH 5.0, 30 min). After five regenerations, 90.3% removal remained. The adsorption mechanism of MFBC for U(VI) involved electrostatic interaction, surface complexation, ion exchange and reduction reaction, making it a highly efficient and excellent adsorbent for treating uranium-containing wastewater.
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JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2025
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IF 6.2
Zhengzhi Zhang,Zhanku Li,Honglei Yan,Jingchong Yan,Weidong Zhang,Zhicai Wang,Zhiping Lei,Shibiao Ren,Hengfu Shui
Investigating the forms of organic sulfur in coal and their thermal conversion characteristics is crucial for the efficient utilization of high-sulfur coal. The research explores the extraction of thermal dissolution soluble fraction (DZE) from Duizhen high-sulfur coking coal (DZ) using thermal dissolution technology and investigates the impact of volatile and ash compositions on the migration behavior of organic sulfur through various co-pyrolysis experiments. The results indicate that sulfurs present in sulfides and sulfates exhibit a greater tendency to migrate into the gas or liquid phase compared to other sulfur forms. During DZE pyrolysis, the residual rate of sulfoxides in coke was lower than that observed during DZ pyrolysis, while the rates for thiophene and sulfone remained relatively stable. Co-pyrolysis experiments demonstrate that volatile matter reduce sulfur retention in coke by providing active hydrogen in situ and enhancing mass transfer. The alkaline minerals (Fe 2 O 3 and CaO) in the ash, counteract the beneficial effects of volatiles on thermal desulfurization by trapping S radicals and H 2 S. However, deashing treatment enhanced the migration of sulfur to the gas and liquid phases during pyrolysis, facilitating the decomposition and conversion of sulfones. These findings suggest that the coke industry can effectively utilize pretreated high-volatile coal as a hydrogen-supplying raw material for the thermal desulfurization of high-sulfur coal.
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INORGANIC CHEMISTRY COMMUNICATIONS
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2026
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IF 5.4
Xiankang Liu,Jun Yang,Qin Peng,Zhigang Xie,Yuhan Wang,Xingji Chen,Taiping Xie,Quanzhou Chen,Meiying Huang
With the growing popularity of coffee culture, discard coffee grounds, as a renewable resource, can be converted into biochar through pyrolysis and used to remediate heavy metal-contaminated wastewater. However, original biochar adsorbents mainly remove lead (Pb 2+ ) through physical processes, resulting in low adsorption capacity, poor selectivity, and potential secondary lead leaching. We designed a functional coffee grounds biochar (PBCx) via pyrolysis-H₃PO₄ activation-secondary pyrolysis coupling technology. The optimal PBC3 absorbent possesses abundant microporous structure and a high specific surface area (102 m 2 /g), exhibiting an adsorption capacity of 166 mg/g for Pb 2+ , significantly higher than unactivated biochar (BC) under the same conditions. Mechanism studies confirmed that the superior adsorption performance stems from functional group anchoring of PBC3, resulting in highly stable phosphate and carbonate mineral phases, and the lone pair electron coordination of P O and C O groups. This research provides a high-value and environmentally friendly pathway for the resource utilization of waste coffee grounds, while also offering a novel strategy for the industrial application of heavy metal adsorption.
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高影响因子
PROGRESS IN ORGANIC COATINGS
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2026
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IF 7.3
Jiayun Su,Minfeng Huang,Jiankun Wu,Jianyu Wu,Yuying Yang,Yan Yu,Rilong Yang
As a renewable building material, wooden material is susceptible to frost and icing when exposed to harsh outdoor conditions, which not only severely affects the service life of wood but also cause significant safety hazards. Constructing superhydrophobic wooden surfaces with photothermal functions is an effective way to delay droplet freezing and ice accumulation. However, this modification strategy always involves complex preparation processes, and the durability of these superhydrophobic wooden surfaces is unsatisfactory. In this work, a one-stone-two-birds tactic to construct durable superhydrophobic wood/bamboo surface with photothermal effect was proposed. By thermally decomposing wood pre-coated with a polydimethylsiloxane/hydroxyapatite nanospheres (PDMS/HAP) layer, PDMS was converted into silica nanoparticles with silane on the surface, and a carbon layer with photothermal conversion properties was formed on the wooden surface. The simultaneous generation of hydrophobic silica nanoparticles and a carbon layer endowed the wood/bamboo surface with durable superhydrophobic properties and photothermal conversion capabilities. This method can be applied to various wood species and bamboo. The obtained wooden superhydrophobic surface exhibited a water contact angel of 160.5°, and has excellent durability. This superhydrophobic surface could not only withstand physical abrasion such as sandpaper abrasion and water impact, but also maintain its superhydrophobicity after exposure to chemical corrosion and UV irradiation. This superhydrophobic layer also provided the wooden materials with good dimensional stability and moisture resistance. In addition, the photothermal conversion effect enabled the wood surface to rapidly rise to 55.3 °C under one sun illumination, and ice crystals slid off its surface within 8 s. This work presents a simple and promising strategy for constructing photothermal and superhydrophobic layer on wood/bamboo surface, and is expected to mitigate the frosting and icing problems of wooden building materials in cold conditions and extend their service life.
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高影响因子
CERAMICS INTERNATIONAL
·
2019
·Vol. 45
·期 6
·7916-7922
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IF 3.45
Ruichong Chen,Jianqi Qi,Xiaofeng Guo,Diyin Ye,Xiuling Wang,Qiwu Shi,Di Wu,Zhijun Liao,Tiecheng Lu
B 4 C hollow microspheres have been proposed as one of the promising ignition capsules for inertial confinement fusion (ICF). It is worth noting that the selection of easier-to-remove substrate materials is the key to obtaining B 4 C hollow microspheres . In this work, B 4 C core-shell microspheres with a uniform structure are prepared by the wet coating method on a PAMS substrate. After the calcination , the complete thermal decomposition of the PAMS substrate leads to a hollow structure B 4 C ceramic microsphere. The effects of solid content of coating slurry on the morphology and microstructure of the B 4 C core-shell microspheres were investigated in detail. The result shows that the spacing of the B 4 C particles in the slurry gradually decreases with increasing the solid content, resulting in an increase in the surface tension of the slurry and an improved stabilization, which helps to optimize the surface roughness and sphericity of the B 4 C microspheres.
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高影响因子
ACS Sustainable Chemistry & Engineering
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2019
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IF 6.97
Yanyan Liu,Zhaorui Min,Jianchun Jiang,Kang Sun,Jie Gao,Yuan Shang,Baojun Li
Construction of tightly bonded interfaces is an indispensable and critical strategy for promoting the catalytic performances of composite structures. In this study, a novel two-dimensional (2D) composite was successfully fabricated through the simultaneous formation of cobalt sulfide (Co9S8) nanosheets and N-, S-doped graphene (NSG). Cobalt–thiourea with graphene oxide was used as the precursor for a low-temperature and one-step pyrolysis. The optimal Co9S8/NSG-220 achieved a small onset overpotential of 147 mV, a low Tafel slope of 97 mV·dec–1, superior long-term durability after 16 h, and high faradic efficiency (nearly 100%) for the hydrogen evolution reaction (HER) in an acid electrolyte. The tightly bound sheet-on-sheet structure significantly enhanced the intrinsic catalytic activity due to the mutual activation effects between the components. Based on the experimental investigation and density functional theory calculations, the mutual activation effects induced by the electron transfer across the active interface constructed between NSG and Co9S8 was proposed as a key factor in the origin of superior catalytic activity. The HER catalytic activities were further improved by doping Mo into the composites. This design inspires new thoughts for exploring 2D composites prepared using molecular precursors with controlled compositions and morphologies as performance-enhanced electrocatalysts for future sustainable clean energy conversion.
研究领域:
材料科学
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电化学
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能量转换
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纳米技术
·
催化
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高影响因子
CARBON
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2018
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IF 7.082
Hua Xiao,Pu Xie,Shou Ji Qiu,Min Zhi Rong,Ming Qiu Zhang
Three-dimensional carbon-based foam (3D-CF) possesses many fascinating properties such as giant conductivity, high thermal insulation , outstanding mechanical performance, and excellent chemical and thermal stabilities. However, most 3D-CFs acquired by the previously reported fabrication methods have some limitations, such as uncontrollable morphology, plenty of inherent defects, difficult to realize self-standing after removing sacrificial template, and overlapping joint flaws among graphene layers . Although significant research efforts have been devoted to develop 3D foam, it is still a challenging task to obtain 3D-CF with both high conductivity and outstanding mechanical performance, simultaneously. To address this issue, a novel and easy fabricating approach for 3D ultrathin-graphite carbon foam (3D-UGF) was explored by a morphology-retaining pyrolysis of polyaniline foam precursors. The typical 3D-UGF graphitized at 2800 °C exhibited stronger compressive strength and electrical conductivity under the compressive strain of 90%, and remained constant even after 2000 cycles, which are comparable to the previously reported state-of-the-art 3D-CF foam with the same density. Cycling performance of the lithium-sulfur and lithium-air batteries with the 3D-UGF as binder-free cathode is as high as 1590 mAh g −1 and 920 mAh g −1 after deep discharge/charge 100 cycles, respectively.
研究领域:
材料科学
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储能
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纳米技术
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电化学
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高影响因子
危险品化学品经营许可证（带存储）