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Article
Chemistry, Applied
Guohu Zhang et al.
Summary: Donor-acceptor type conjugated microporous polymers (D-A CMPs) have gained popularity for photocatalytic hydrogen evolution due to their ability to efficiently separate photoinduced holes and electrons and absorb visible light. This study presents the directed synthesis and photocatalytic activity of two isostructural triazine- and porphyrin-based CMPs. The results show that these CMPs have high specific surface areas and thermal stabilities. The introduction of a Zn atom into a porphyrin ring greatly influences its optoelectronic properties and photocatalytic efficiency. The Zn-Por-TPT CMP has one of the highest reported photocatalytic hydrogen evolution rates for a D-A CMP, and also exhibits improved stability during prolonged irradiation.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Multidisciplinary
Yuchen Yan et al.
Summary: The atomistic structural engineering of donor-acceptor polymer photocatalysts enhances charge separation and photocatalytic hydrogen production. Changing the electron affinity of the acceptor units allows for tuning of electron delocalization and exciton binding energy, resulting in improved efficiency. The optimized sample exhibits the highest H-2 production rate of 3207 mu mol g(-1) h(-1) when ascorbic acid is used as the sacrificial agent. Additionally, photocatalytic H-2 production can be coupled with near stoichiometric conversion of 5-hydroxymethyl furfural to 2,5-diformylfuran.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Polymer Science
Weijie Zhang et al.
Summary: A facile strategy was developed to achieve heterogeneous and high-efficiency photocatalytic dehalogenation by tuning the exciton binding energy of conjugated microporous polymers. The integration of acceptors into the polymer scaffolds effectively minimized the exciton binding energy, suppressed charge carrier recombination, and facilitated charge transfer. The designed CMP-CSU11 exhibited superior photocatalytic dehalogenation efficiency, surpassing state-of-the-art catalysts and enabling a broad scope of substrates with excellent recyclability. This work provides an effective strategy to develop task-specific heterogeneous photocatalysts based on intramolecular charge transfer engineering.
Article
Chemistry, Physical
Xinxin Chen et al.
Summary: By modifying Bi2MoO6 (BMO) with B-doped carbon quantum dots (BCQDs), the photocatalytic performance of the system has been improved in terms of solar absorption, active sites and photogenerated carrier recombination.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Auttaphon Chachvalvutikul et al.
Summary: A series of bismuth-rich solid-solution photocatalysts with controlled I:Br molar ratios were synthesized via microwave heating. The B-I0.3Br0.7 solid solution exhibited the highest photocatalytic activity for 4NP degradation, with degradation rates significantly higher than those of Bi7O9I3 and Bi4O5Br2. The B-I0.3Br0.7 solid solution effectively activated molecular oxygen to produce .O-2 and other reactive species.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Fangyuan Kang et al.
Summary: Developing diverse synthetic routes to prepare various crystalline covalent organic frameworks (COFs) and enriching the COFs family is crucial. In this research, the Kro''hnke oxidation method was used to construct two crystalline nitrone-linked COFs (CityU-1 and CityU-2) through the ingenious design of precursors and careful control of polymerization conditions. The as-obtained crystalline COFs were characterized and showed potential applications, such as high specific surface area and I-2 capture capacity.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Changzhi Han et al.
Summary: Conjugated microporous polymer (CMP) photocatalysts with D-p-A-A structure, especially with optimized content of BTDO acceptor, exhibit enhanced photocatalytic activity for solar-driven hydrogen generation due to their electronic structure, reaction sites availability, and the separation of photoexcited charges.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Qi Liu et al.
Summary: A series of hollow tubes of porphyrin-phthalocyanine-based conjugated microporous polymer (MPorPc-CMP) were synthesized and their unique structures provided exposed active sites for adsorption. NiPorPc-CMP showed the best band structures and built-in electric field, enabling high degradation efficiency of bisphenol A (BPA) and sensitive detection with a low LOD.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Xiaoyun Dong et al.
Summary: Conjugated microporous polymers (CMPs) are designed through molecular building units and have been widely used as photoactive materials. In this study, a carbazole-anthraquinone CMP (CzAQ-CMP) was prepared using carbazole and anthraquinone for visible light photocatalysis. Theoretical calculations indicated that hole and electron are located at carbazole and anthraquinone, respectively. CzAQ-CMP enables electron transfer to molecular oxygen via anthraquinone, leading to the formation of superoxide. The hole in CzAQ-CMP drives the oxidative cyanation of N,N-dimethylaniline in methanol. Moreover, the presence of acetic acid allows the release of cyanide ions from superoxide, which participates in the a-cyanation reaction of N,N-dimethylaniline. Under green light irradiation, the oxidative cyanation of various tertiary amines selectively gives high yields of corresponding a-aminonitriles over CzAQ-CMP. This work highlights the rational design of CMPs for photocatalytic selective organic transformations.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Jaewon Lee et al.
Summary: We investigated the degradation of bisphenol A (BPA) and its alternatives, bisphenol S (BPS) and bisphenol AF (BPAF), in water using the UV-LED/chlorine reaction. The removal of these compounds followed pseudo-first-order kinetics, with BPA being the most effectively removed at pH 7 due to its electron-donating isopropyl group. The degradation mechanisms varied depending on pH, with reactive chlorine species (RCS) playing a major role at pH 6 to 8 and chlorination reaction being dominant at pH 9. Chlorinated BPs (ClxBPs) were identified as major transformation products, and the UV-LED/chlorine reaction effectively removed these compounds. Various degradation pathways, such as chlorine substitution, coupling reaction, and hydroxylation, were proposed based on the identified transformation products and theoretical reactive sites. The UV-LED/chlorine process also showed effective reduction of the ecotoxicities of BPs and their transformation products.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Jialin Jia et al.
Summary: This study investigated the degradation of bisphenol F (BPF), bisphenol AF (BPAF), and bisphenol S (BPS) by peroxymonosulfate (PMS) with TiO2 nano-tubes arrays (TiO2NTAs) under simulated sunlight irradiation for the first time. The results showed different reactive species played a dominant role in the oxidation process of BPF, BPAF, and BPS, with acidic conditions favoring their degradation. Common degradation pathways and specific degradation pathways were identified through the analysis of oxidation intermediates for the three bisphenols.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Pengfei She et al.
Summary: This review summarizes the recent progress of smart 2D COFs that show reversible changes in conformation, color, and luminescence in response to external stimuli. The responsive mechanisms, design strategies, and applications in chemical sensors and photoelectronic devices are discussed, providing guidelines for designing novel stimulus-responsive 2D COFs for advanced photoelectronic applications.
ADVANCED MATERIALS
(2022)
Article
Environmental Sciences
Shuoyu Dong et al.
Summary: A novel nitrogen doped organic porous functional azo linked polymer (ALP-p) was designed and prepared for the effective removal of refractory bisphenol A (BPA) from water. The ALP-p showed high adsorption capacity and good recyclability, making it a promising material for BPA removal.
ENVIRONMENTAL RESEARCH
(2022)
Review
Materials Science, Multidisciplinary
Nazanin Taheri et al.
Summary: Porous organic polymers (POPs) have attracted much attention due to their attractive architecture and functionalizable porous structure. POPs synthesized via Friedel-Crafts reaction have shown competitiveness in various applications. This review focuses on the recent applications of POPs in gas adsorption and separation, catalyst, water treatment, biomedical, and electrochemical applications.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Physical
Ting-ting Cao et al.
Summary: Co-BiOCl/biochar hybrid catalysts were synthesized using a hydrothermal process and applied in the photocatalytic degradation of BPA. The results demonstrated that the loading of biochar and doping of cobalt enhanced the catalytic efficiency of BiOCl, leading to efficient removal of BPA.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Environmental
Jianan Cui et al.
Summary: A novel catalyst was successfully prepared in this study, which can efficiently activate peroxymonosulfate for the degradation of organic pollutants, especially showing significant performance in BPF removal. The catalyst exhibited excellent catalytic activity over a wide range of pH values.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Environmental Sciences
Myeong Yeon Lee et al.
Summary: A new porphyrinic porous organic polymer (PPOP) with high stability and excellent textural properties was successfully synthesized and applied for efficient bisphenol A (BPA) adsorption in water. PPOP demonstrated high effectiveness in capturing BPA, with the adsorption process influenced by factors such as pi-pi interaction, hydrogen bonding, and hydrophobic interactions. The material showed easy regeneration and maintained over 98% efficiency throughout repeated adsorption-desorption cycles.
Article
Engineering, Chemical
Yabin Li et al.
Summary: This study utilized natural clay palygorskite to mediate monodispersed CoFe2O4 nanoparticles for efficient degradation of BPS in water purification. The 16%-CFO@PAL composite showed excellent catalytic performance, achieving a satisfactory BPS removal rate (>99%).
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Environmental
Peipei Sun et al.
Summary: This study compared the behaviors of LDPE MPs with BPA additives and PC MPs with BPA monomers in different artificial aging processes. The results showed that aged LDPE has a strong sorption ability towards BPA in water environment, while aged PC leads to high leakage of BPA monomers.
Article
Environmental Sciences
Lu Liu et al.
Summary: In this study, manganese oxide-carbon nanocomposite catalytic materials with a core-shell structure were successfully synthesized using sodium alginate as a template. The MnO@CNs showed excellent performance in degrading BPF by promoting electron transfer and generating various free radicals and non-radicals.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Yan Li et al.
JOURNAL OF HAZARDOUS MATERIALS
(2020)
Article
Environmental Sciences
Zhen Liu et al.
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Chemistry, Physical
Chun-Shuai Cao et al.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2020)
Review
Chemistry, Multidisciplinary
Ting Zhang et al.
MATERIALS CHEMISTRY FRONTIERS
(2020)
Article
Engineering, Electrical & Electronic
Jianxin Liu et al.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2019)
Article
Chemistry, Physical
Samia Ben Hammouda et al.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2017)
