Strong Metal-Support Interaction in Pt/TiO₂ Induced by Mild HCHO and NaBH₄ Solution Reduction and Its Effect on Catalytic Toluene Combustion

Strong metal-support interaction (SMSI) in titania supported noble metals has been a subject of many studies due to its importance to many fields of science, in particular to material science and catalysis system. H₂ reduction at a high temperature has been commonly considered as the inducement to SMSI in TiO₂ supported noble metals. This work, however, demonstrates that SMSI in Pt/TiO₂ can occur through mild NaBH₄ and HCHO solution reduction processes based on CO chemisorption, transmission electron microscopy, and X-ray photoelectron spectroscopy characterizations. Moreover, the effect of TiO₂ crystalline forms on the degree of SMSI in NaBH₄ reduced Pt/TiO₂ and the performance of the as-reduced catalysts for trace toluene combustion reaction were studied. It was found that the degree of SMSI in Pt/TiO₂ drew a significant effect on the catalytic performance. Our discovery provides a new way to control the interaction between noble metals and the TiO₂ support as well as their catalytic activities

MnO₂ Promoted TiO₂ Nanotube Array Supported Pt Catalyst for Formaldehyde Oxidation with Enhanced Efficiency

Highly ordered pore-through TiO₂ nanotube arrays (TiNT) prepared by an electrochemical anodization method were modified with MnO₂ and used as the support for a Pt/MnO₂/TiNT catalyst. The monolith-like Pt/MnO₂/TiNT was then applied to low-concentration HCHO oxidation with enhanced efficiency. The effect of the MnO₂ promotion on its performance for HCHO oxidation was studied with respect to the behavior of adsorbed species on the catalyst surface using in situ diffuse reflectance Fourier transform spectroscopy. In comparison with Pt/TiNT, Pt/MnO₂/TiNT shows higher activity under parallel preparation and test conditions. A HCHO conversion of 95% with a more than 100 h stable performance is achieved over Pt/MnO₂/TiNT at 30 °C with a low 0.20 wt % Pt loading amount. The superior performance is related to the specific monolith-like structure and its confinement effect, metal–support interaction, and superior HCHO adsorption and storage properties of Pt/MnO₂/TiNT

Raw data from Soy protein isolate-carboxymethyl cellulose conjugates with pH sensitivity for sustained avermectin release

Graft ratio, FTIR, TG, DTG , DSC, Size distribution in SEM images,EE, Zeta Potential, DLS Size, anti - UV, Liquid holding capacity, sustain release and toxicity test dat

GPC test results of CMC from Soy protein isolate-carboxymethyl cellulose conjugates with pH sensitivity for sustained avermectin release

Cirrus GPC Sample Injection Repor

XRD raw data from Highly efficient triazolone/metal ion/polydopamine/MCM-41 sustained release system with pH sensitive for pesticide delivery

MCM-41 was prepared through the sol–gel method and encapsulated by polydopamine (PDA) before coordinated with metal ion to form a highly efficient sustained release system (M-PDA–MCM-41) for triazolone delivery. The characterization results confirmed the existence of the coordination bond between the PDA layer and triazolone through the bridge effect from metal ion, which enhanced the interaction between PDA–MCM-41 and triazolone. The adsorption capacity (AC) of Fe-PDA–MCM-41 increased up to 173 mg g^–1, which was 160% more than that of MCM-41. The sustained release performance of M-PDA–MCM-41 in different pH values was investigated. Under the conditions of pH ≤7, the release speed of triazolone increased with pH decreasing. Whereas its release speed in the weak base condition was slower than in the neutral condition. Therefore, the as-synthesized system showed significant pH-sensitivity in the sustained release process, indicating that the sustained release system can be well stored in the neutral or basic environment and activated in the acid environment. Their sustained release curves described by Korsmeyer–Peppas equation at pH 7 showed the same behaviour, indicating that PDA decoration or metal ion coordination only increases the steric hindrance and the interaction between carrier and triazolone instead of changing the original structure of the pure MCM material in accordance with XRD and BET analysis results

FT-IR raw data from Highly efficient triazolone/metal ion/polydopamine/MCM-41 sustained release system with pH sensitive for pesticide delivery

MCM-41 was prepared through the sol–gel method and encapsulated by polydopamine (PDA) before coordinated with metal ion to form a highly efficient sustained release system (M-PDA–MCM-41) for triazolone delivery. The characterization results confirmed the existence of the coordination bond between the PDA layer and triazolone through the bridge effect from metal ion, which enhanced the interaction between PDA–MCM-41 and triazolone. The adsorption capacity (AC) of Fe-PDA–MCM-41 increased up to 173 mg g^–1, which was 160% more than that of MCM-41. The sustained release performance of M-PDA–MCM-41 in different pH values was investigated. Under the conditions of pH ≤7, the release speed of triazolone increased with pH decreasing. Whereas its release speed in the weak base condition was slower than in the neutral condition. Therefore, the as-synthesized system showed significant pH-sensitivity in the sustained release process, indicating that the sustained release system can be well stored in the neutral or basic environment and activated in the acid environment. Their sustained release curves described by Korsmeyer–Peppas equation at pH 7 showed the same behaviour, indicating that PDA decoration or metal ion coordination only increases the steric hindrance and the interaction between carrier and triazolone instead of changing the original structure of the pure MCM material in accordance with XRD and BET analysis results

BET raw data from Highly efficient triazolone/metal ion/polydopamine/MCM-41 sustained release system with pH sensitive for pesticide delivery

MCM-41 was prepared through the sol–gel method and encapsulated by polydopamine (PDA) before coordinated with metal ion to form a highly efficient sustained release system (M-PDA–MCM-41) for triazolone delivery. The characterization results confirmed the existence of the coordination bond between the PDA layer and triazolone through the bridge effect from metal ion, which enhanced the interaction between PDA–MCM-41 and triazolone. The adsorption capacity (AC) of Fe-PDA–MCM-41 increased up to 173 mg g–1, which was 160% more than that of MCM-41. The sustained release performance of M-PDA–MCM-41 in different pH values was investigated. Under the conditions of pH ≤7, the release speed of triazolone increased with pH decreasing. Whereas its release speed in the weak base condition was slower than in the neutral condition. Therefore, the as-synthesized system showed significant pH-sensitivity in the sustained release process, indicating that the sustained release system can be well stored in the neutral or basic environment and activated in the acid environment. Their sustained release curves described by Korsmeyer–Peppas equation at pH 7 showed the same behaviour, indicating that PDA decoration or metal ion coordination only increases the steric hindrance and the interaction between carrier and triazolone instead of changing the original structure of the pure MCM material in accordance with XRD and BET analysis results

XPS raw data from Highly efficient triazolone/metal ion/polydopamine/MCM-41 sustained release system with pH sensitive for pesticide delivery

MCM-41 was prepared through the sol–gel method and encapsulated by polydopamine (PDA) before coordinated with metal ion to form a highly efficient sustained release system (M-PDA–MCM-41) for triazolone delivery. The characterization results confirmed the existence of the coordination bond between the PDA layer and triazolone through the bridge effect from metal ion, which enhanced the interaction between PDA–MCM-41 and triazolone. The adsorption capacity (AC) of Fe-PDA–MCM-41 increased up to 173 mg g^–1, which was 160% more than that of MCM-41. The sustained release performance of M-PDA–MCM-41 in different pH values was investigated. Under the conditions of pH ≤7, the release speed of triazolone increased with pH decreasing. Whereas its release speed in the weak base condition was slower than in the neutral condition. Therefore, the as-synthesized system showed significant pH-sensitivity in the sustained release process, indicating that the sustained release system can be well stored in the neutral or basic environment and activated in the acid environment. Their sustained release curves described by Korsmeyer–Peppas equation at pH 7 showed the same behaviour, indicating that PDA decoration or metal ion coordination only increases the steric hindrance and the interaction between carrier and triazolone instead of changing the original structure of the pure MCM material in accordance with XRD and BET analysis results

Large Ultrathin Polyoxomolybdate-Decorated Boron Nitride Nanosheets with Enhanced Antibacterial Activity for Infection Control

To address the challenges in bacterial infection for killing germs without using antibiotics, the development of an efficient and safe antibacterial nanomaterial to control severe bacterial infection has become a critical issue. Herein, ionic liquid (IL)-promoted simultaneous exfoliation and conjugation of boron nitride nanosheets (BNNSs) with ammonium dimolybdate (ADM) are developed. Such an approach provides large ultrathin nanosheets with three to four layers and micron lateral dimensions and facilitates intercalation with a molybdenum (Mo) content of 6.25%. BNNS-IL-ADM provides nanoconfinement inducing capability for sustained release of Mo ions to decelerate the cumulative release rate by 30.45%. BNNS-IL-ADM imparts a superior antibacterial effect especially at a low concentration level of bioactive components, which improves the antibacterial efficiency by 92.00% against Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus in comparison with ADM. The enhanced antibacterial performance is strongly dependent on the synergistic effect between the BN nanocarrier and bioactive ADM, in which the bacterial cell adhesion induced by the inherent hydrophobic property of the BNNS and the nanochannels within BNNS-IL-ADM protecting the bioactive ingredient and achieving a sustained release play significant roles. BNNS-IL-ADM can serve as a safe and efficient antibacterial agent with very low cytotoxicity. Such features offer a feasible strategy for simultaneous exfoliation and functionalization of boron nitride nanosheets as a promising platform for the delivery of bioactive ingredients against bacterial infections

Antibacterial Microfibrillated Cellulose as Stimuli-Responsive Carriers with Enhanced UV Stability for Sustained Release of Essential Oils and Pesticides

Plant essential oils and pesticides are commonly used methods for preventing and controlling agricultural pests and diseases. To address the challenges of volatility of essential oils and ultraviolet sensitivity of avermectin (AVM), herein, microfibrillated cellulose anchored with ammonium molybdate (MFC-POM) was constructed via the emulsion template method and the ion exchange process and applied as carriers for tea tree oils (TTO) and AVM to protect the active ingredients. The amount by anchoring of molybdenum oxygen cluster ions into cellulose skeleton was ∼29.54%. MFC-POM exhibited a relatively high loading capacity for both TTO and AVM of 52.23 and 42.12%, respectively. Meanwhile, TTO@MFC-POM possessed a long-term sustained release behavior fitting with logistic release kinetics model and held enhanced antibacterial activity compared to pure TTO and MFC-POM. AVM@MFC-POM exhibited pH-responsive release behavior with more AVM release under acidic and alkaline conditions. Furthermore, AVM@MFC-POM presented remarkable ultraviolet light resistance with a half-life nearly 30 times longer. MFC-POM also represented superior wetting properties and a noticeable increase in liquid retention on cucumber foliar surfaces. AVM@MFC-POM retained insecticidal toxicity, provided trace nutrient element Mo, and promoted germination and plant growth, thus exhibiting good biological safety. Overall, MFC-POM could serve as an effective carrier for protecting active ingredients and improving their effectiveness for agricultural disease and pest control