Materials
·
2024
·Vol. 17
·期 13
·3058
·
IF 3.1
Ziyue Wang,Ying Zhang,Hao Zhang,Qingdi Sun,Xiaohui He,Hongbing Ji
As worldwide plastic pollution continues to rise, innovative ideas for effective reuse and recycling of waste plastic are needed. Single-atom catalysts (SACs), which are known for their high activity and selectivity, present unique advantages in facilitating plastic degradation and conversion. Waste plastic can be used as a support or raw material to create SACs, which reduces waste generation while simultaneously utilizing waste as a resource. This work successfully utilized waste plastic polyurethane (PU) as a support, through a unique Rapid Thermal Processing Reactor (RTPR) to synthesize an efficient Pd1/PU SACs. At 25 °C and 0.5 MPa H2, Pd1/PU displayed outstanding activity and selectivity in the hydrogenation of styrene, as well as remarkable stability. Pd1/PU performed well in hydrogenating a variety of common substrates. These findings highlight the great potential of SACs in plastic waste reuse and recycling, offering intriguing solutions to the global plastic pollution problem.
研究领域:
环境科学
·
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Materials Technologies
·
2024
·
IF 6.4
Xin Hou,Penggang Ren,Wenhui Tian,Runzhuo Xue,Wu Tong,Zhengyan Chen,Fang Ren,Yanling Jin
Carbon materials have become a focal point in supercapacitors (SCs) due to their perfect charge–discharge behavior, relatively low cost, and excellent electrochemical stability, but the limited electrochemical activity restricts their further development. MXenes (Ti 3 C 2 T x ) combine high electrical conductivity, hydrophilicity, and abundance surface functional groups, which contribute to high energy density when compounded with carbon materials. In this work, carbon material derived from mineral water bottles is modified with cetyltrimethylammonium bromide (CTAB) that spontaneously forms into porous heterogeneous structures with Ti 3 C 2 T x under electrostatic interactions. The carbon material hinders the reaggregation of Ti 3 C 2 T x , while Ti 3 C 2 T x increases the electrochemical activity on the surface of the carbon material. A hierarchical porous carbon with a large specific surface area of 1754.3 m 2 g −1 , promoting the electrolyte migration kinetics and high specific capacitance in 6 m KOH electrolyte (404.1 F g −1 at 1 A g −1 ). The symmetric SC made as-prepared carbon electrode shows an extended voltage window (1.8 V), an optimal energy density (31.19 Wh kg −1 at a power density of 450 W kg −1 ) and a low capacitance decay (1% after 15 000 cycles) in 1.5 m Na 2 SO 4 . The preparation of electrode material with a unique structure provides a practical and innovative strategy for the value-added utilization of waste plastics.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2022
·Vol. 24
·期 23
·9191-9202
·
IF 11.034
Xiaojie Tian,Xinyu Bian,Zihong Zeng,Jiamin Xu,Anqi Dai,Linyao Ke,Yuan Zeng,Qiuhao Wu,Yuhuan Liu,Kirk Cobb,Roger Ruan,Yunpu Wang
Co-pyrolysis of biomass and waste plastics has the potential to produce high-quality chemicals and these resources are recycled to realize their clean and efficient utilization. However, the current co-pyrolysis technology often mixes them physically, which can cause key problems, such as large differences in pyrolysis characteristics, restricting the synergistic effect of co-pyrolysis intermediates. The purpose of this study was to construct a segmented co-pyrolysis system and use FeCl3 and MCM-41 as in situ catalysts for Choerospondias axillaris seeds (CAS) and low-density polyethylene (LDPE), respectively, to analyze the relationship between different in situ catalyst addition ratios (0%, 3%, 5%, 7% and 10%) and pyrolysis products. In addition, the product distribution of the various parts of the segmented co-pyrolysis system as well as the comparison of segmented and traditional mixed co-pyrolysis were investigated. The results showed that FeCl3 can help in promoting the conversion of hemicellulose and cellulose to furans from CAS. The relative content of furans in the liquid product reached 61.08 wt% when its addition was 7%. MCM-41 can achieve its best catalytic effect when its addition was 5% in LDPE. Furthermore, segmented co-pyrolysis can promote the Diels–Alder reaction between furans and olefins and result in the content of monocyclic aromatic hydrocarbons (MAHs) in the liquid product reaching up to 72.01 wt%. Compared with traditional mixed co-pyrolysis, the relative content of MAHs of segmented co-pyrolysis was 13.53 wt% higher and the wax yield was 14.49 wt% lower. Therefore, segmented co-pyrolysis can offer potential benefits for future industrial application, compared to a traditional co-pyrolysis process.
研究领域:
能源与环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhiyi Wang,Jiming Su,Jianchao Wang,Yijin Feng,Qianqian Xu,Hui Wang,Hongru Jiang
In the context of the ongoing advancements in high-performance chips, heat dissipation, and electromagnetic shielding within electrical and electronic equipment are becoming increasingly intricate. Plastics have garnered widespread usage in electrical and electronic equipment as prevalent framework materials. However, the challenge persists in achieving a unification of electromagnetic interference (EMI) shielding, thermal conductivity (TC), and electrical insulation performance for plastics. Herein, we capitalize on the styrene–butadiene–styrene (SBS) copolymer to integrate the merits of polymers and magnetic minerals. Utilizing pyrrhotite (Pyr) tailings and waste polystyrene (PS) as raw materials, a formable block material denoted as PS-S@SBS/Pyr has been formulated. This material exhibits commendable performance in terms of TC, electrical insulation, and EMI shielding performance concurrently. The bidirectional bridging effect of SBS effectively reduces the interfacial thermal resistance between PS and Pyr. The TC of PS-S@SBS/Pyr can reach a maximum of 1.36 W/m‧K with a resistivity greater than 10 8 Ω‧m. Moreover, PS-S@SBS/Pyr consistently demonstrates a stable EMI shielding effectiveness of 33.1 dB within the 8–12 GHz frequency range, with absorption shielding predominating as the underlying mechanism. This green preparation method makes efficient utilization of two main solid wastes while increasing the added value of the material.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Chenghua Zhang,Yunfei Yan,Kaiming Shen,Zongguo Xue,Yonghong Wu,Zhongqing Yang,Yanqiong Bao
Water scarcity and waste plastics elimination are long-term problems facing sustainable development, and solar interface evaporation to produce clean water is regarded as a promising water treatment technology. Herein, we report on low-cost waste plastic bottles synthetic carbon-based photothermal materials. By KOH activation and perforation, the surface crack structure of porous carbon is formed to facilitate multi-stage reflection of solar light, and significantly improve the solar light absorbance and photothermal conversion ability. Three-dimensional solar evaporators with low thermal conductivity and super hydrophilic wood sponge are fabricated, and the rectangular hole is designed to regulate water movement and prevent heat dissipation. When exposed to 1 sun illumination (1 kW/m 2 ), an evaporation rate of 1.59 kg·m- 2 ·h- 1 is achieved, along with an energy conversion efficiency of 88.49 %. In addition, different micro-surface rough structures are constructed to boost the solar light absorption, thereby enhancing the photothermal conversion ability, among which the micro-cone structure increased the evaporation rate to 1.93 kg·m −2 ·h −1 , demonstrating excellent stability over 15 cycles. In the simulated sewage purification process, the removal rate of pollutants is 99.9 %, and the evaporator without obvious salt accumulation in the seawater for 24 h, showing good salt resistance and self-cleaning ability. This research has important reference value for high-value preparation of carbon-based photothermal materials from waste plastics, extraction of clean water and environmental sustainable protection.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 65
·37759-37767
·
IF 3.049
Chuanming Yu,Wenyu Lin,Jine Jiang,Zhanxin Jing,Pengzhi Hong,Yong Li
In order to cope with the increasing oil spill accidents and the intentional discharge of oily wastewater, a new oil-adsorbing material with superhydrophobicity and reusability is needed. In this paper, waste plastic was used to fabricate an alveolate polystyrene (PS) foam to reduce secondary pollution. The PS foam was synthesized from a high internal phase Pickering emulsion (HIPPE) technique in a one-step process. The emulsion was stabilized by a co-Pickering system of Span 80 surfactant and SiO2 particles. To explain the super stability of the HIPPE, a novel model of the water-in-oil droplet was promoted. The obtained SiO2@PS foam exhibited a multi-order-porous structure, and displayed superhydrophobicity and superoleophilicity. It can selectively remove various oily contaminants from water with a high adsorption capacity of 20.4–58.1 g g−1 at a fast rate. The oil-adsorbed material can be reused by simple centrifugation, and no more than a 1% decline was obtained in the oil adsorption after 10 cycles. Therefore, the SiO2@PS foam has a great potential application in oily water treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2023
·
IF 6
Chengxuan Zhou,Danni Deng,Chao Huang,Yu Xie,Hang Dong,Yujiao Wen,Bo Li,Zhi Zhou,Wei Luo,Zhonghua Zhou
The search for cost-effective, high-performance catalysts is crucial in catalytic co-pyrolysis. Different Fe-Mo@X catalysts (X = Al 2 O 3 , MgO) and reaction temperatures (600 ℃, 700 ℃, 800 ℃, 900 ℃) were tested to optimize hydrogen production and carbon quality while also exploring CNTs degradation performance. The results indicate that both catalyst type and operating parameters are highly dependent on the growth of carbon nanotubes and hydrogen. The FeMo@Al 2 O 3 catalyst exhibits superior catalytic activity attributed to its more abundant mesoporous structure and higher specific surface area. Specifically, FeMo@Al 2 O 3 achieved the highest yield of carbon nanotubes (84.42%) at 700 ℃, and attained the maximum hydrogen yield (49.57%) at 900 ℃. However, the CNTs synthesized from FeMo@MgO exhibited fewer defects, higher graphitization degree and purity (Raman and TPO). CNTs/MgO significantly enhanced the degradation efficiency of Clothianidin by virtue of their superior electron transport properties and chemical bonding between MgO and CNTs.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Changhui Liu,Tong Xiao,Xulong Yang,Jiapeng Wang,Yaodong Zhang,Zafar Said
As one of the most common fossil derivatives, plastic is indispensable in daily life because of its promising mechanical properties, chemical stability, and easy accessibility. However, plastics still present a huge burden on the global environment due to their high production volume , difficulty with degradation and low recycling rate. At the same time, global primary energy reserves are decreasing, thus achieving highly efficient use of energy has become a hot topic of research. Herein, the waste plastics can be utilized as a supporting material and encapsulation the phase change materials through intermolecular hyper-crosslinking reaction with the assistance of Lewis acids. To illustrate the effect of porous structure on the thermophysical properties and energy storage characteristics of the obtained materials, three aromatic crosslinkers , triphenylphosphine, triphenylbenzene, and benzene were examined regarding their performance on the Fridel-Crafts reactions. It is found that the obtained materials bearing a thermal conductivity and latent heat of 0.22 W/mK and 145.7 J/g, respectively, without liquid leakage .
研究领域:
能源材料
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Clean Technologies and Environmental Policy
·
2023
·Vol. 25
·期 9
·2929-2949
·
IF 4.3
Soni Ashish,Das Pankaj Kumar,Kumar Sanjay
The recycling of waste plastics has been recognized as an enticing approach towards the circular economy. The post-consumer plastic products with the incorporation of agro-industrial waste were utilized for the advancement of value-added composites for structural applications. The properties of the composites, namely density, water absorption, compressive strength, flexural strength and abrasive wear, were found to influence by the type of plastics which increases the complexity in the material selection. The research proposed an integrated Analytic Hierarchy Process—Weighted Aggregated Sum Product Assessment (AHP-WASPAS) mathematical model for ranking the composites. The research identified the amalgamation of 15 wt % of rice husk ash and 15 wt % of sand with 70 wt % of polyetheretherketone (PEEK) as a suitable composite for structural applications having minimum abrasive wear and water absorption of 0.0937 cm 3 and 0.05059%, respectively. The maximum density, flexural strength and compressive strength were found to be 1.5116 g/cm 3 , 6.564 MPa and 32.7933 MPa, respectively. Spearman's rank correlation coefficient (SRCC) between the proposed AHP-WASPAS model, and AHP-Weighted Sum Method (WSM), AHP-Technique for Order Performance by Similarity to Ideal Solution (TOPSIS), AHP-COmplex PRoportional ASsessment (COPRAS), AHP-Multi-Objective Optimization on the basis of Ratio Analysis (MOORA), AHP-Multi-Attributive Border Approximation area Comparison (MABAC) and AHP-Additive Ratio Assessment (ARAS) was in the range of 0.7854–1. The sensitivity analyses have observed that the ranking is influenced by the changes in criteria weights includes, density, water absorption, compressive strength, flexural strength and abrasive wear. Moreover, the rankings are unaffected by the parameter lambda ( λ ) in the WASPAS method. The research has verified the feasibility of waste plastics and agro-industrial waste as innovative materials. Moreover, the proposed mathematical model is reliable and enhances the material selection process in the development of composites.
Graphical abstract
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yuxin Qi,Ying Bi,Chao Kong,Changyin Zhu,Hu Cheng,Yinlong Zhang,Jiangang Han,Jianming Xue,Ziyan Li,Yang Song,Dongmei Zhou
Recycling difficult-to-degrade plastics, also known as “white pollution”, is currently being researched in the fields of materials and the environment, which is an extremely challenging topic. In this study, a pyrolysis-activation method combined with multiple activators was developed to prepare stable porous plastic chars (PPCs) from discarded plastic bottles for removing the typical antibiotic sulfamethoxazole (SMX). Micro/mesopores were formed in the PPCs, with the specific surface area reaching 961.20 m 2 /g. C, O, and N were the main elements in the PPCs, and their atomic ratios showed the hydrophobicity and aromaticity. Graphite-like structures and abundant surface functional groups were generated in the PPCs. Unlike conventional char materials, impurities, such as aluminum oxide, have high reflectivity, resulting in the appearance of many shining spots. PPCs display a high sorption capability for SMX, with the maximum sorption quantity determined reaching 487.52 mg/g. Multilayer sorption is dominated by physical processes, and pore filling, partitioning, hydrogen bonding, π-π stacking, and electrostatic interactions are the main sorption processes. Chemical-like sorption and mass transfer control the sorption rate. Furthermore, PPCs have stable performance and good recyclability and could be used for practical applications. This study provides a novel strategy and an example of the upcycling of discarded plastic as an excellent char material for environmental remediation.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2019
·Vol. 34
·期 6
·941-949
·
IF 1.982
Kehan Liang,Lei Liu,Wei Wang,Yifeng Yu,Yuying Wang,Lili Zhang,Chang Ma,Aibing Chen
The excessive use of plastic, especially polystyrene (PS), has caused serious environmental pollution. The efficient utilization of plastics and the conversion of plastics into value-added carbon materials are the concerns of researchers. Herein, we propose novel “pyrolysis–deposition” method to convert one popular plastic substance, PS, into ordered mesoporous carbons (OMCs). During the synthesis process, PS is pyrolyzed into small organic gases under high temperature, which is then adsorbed through capillary adsorption into the mesoporous of SBA-15 in the presence of catalyst. The obtained OMCs have high specific surface area, uniform pore size, and ordered pore structure. The OMCs exhibit specific capacitance of 118 F/g at a current density of 0.2 A/g and electrochemical stability of 87.2% at a current density of 2 A/g after 5000 cycles. The pyrolysis–deposition strategy provides a new idea to convert waste plastics into high-performance carbon materials for electrochemical applications.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Haiping Yang,Shuai Yan,Dingding Yao,Hao Luo,Kuo Zeng,Jun Li,Dian Zhong,Haoyu Xiao,Hanping Chen
A novel photo-thermal catalytic pyrolysis of LDPE was conducted with a solar simulator for effective and energy-conserving production. Four photothermal catalysts, including TiO 2 , NiTi(Ni/TiO 2 ), NiAl(Ni/Al 2 O 3 ) and NiTiAl(Ni/TiO 2 /Al 2 O 3 ), were prepared to study the performance on gas and carbonaceous production at variant temperatures (500 °C, 600 °C and 700 °C). NiTiAl reached carbon nanotubes(CNTs) yield of 280 mg/g plastics with simultaneous hydrogen yield of 54 mmol/g even at 700 °C. For the better understanding of light-induced carbon deposition and hydrogen evolution, pyrolysis in pure thermal mode was also carried out over NiTiAl for comparison, where H 2 production of 28 mmol/g and little carbon product was found. It turns out that the introduction of irradiation together with support component deliberately mediated the metal-support interaction in NiTiAl by certain photoelectrons transfer, which was favorable for CNTs growth and hydrogen evolution. It is expected to provide a design strategy of catalysts in solar pyrolysis of carbonaceous feedstock.
研究领域:
环境科学
·
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）