Metal-organic framework (MOF) nanomaterials offer a wide range of promising applications due to their unique properties, including open micro- and mesopores and rich of functionalization. Herein, a facile synthesis via...
This review highlights the recent development of mesoporous TiO2-based architectures as promising sensing materials for diagnosing diseases and detecting harmful substances in the human body.
Electrochemical biosensors have attracted a tremendous attention for many researchers recently due to its facile synthesis process, tunability easiness by tailoring the material properties or composition, and wide range of biological analyte types detection. To obtain an excellent electrochemical biosensor performance, a material that facilitates fast electron transfer, large surface area, excellent electrocatalytic activity, and abundant available sites for bioconjugation is immensely needed. Metal-organic frameworks in the two-dimensional form (2D MOFs) provide all of the criteria needed as the sensing material for electrochemical biosensors application. However, the design and preparation of 2D MOFs, which have high stability and sensitivity as well as good selectivity for biological analyte detection, is still quite challenging. This review provides the recent studies and development of 2D MOFs as electrochemical biosensor. A detailed discussion about 2D MOFs structures, their synthesis strategy and control, 2D MOFs materials in electrochemical biosensor application, and the future challenges is thoroughly explained in this review. Hopefully, this review will also provide a new inspiration to advance future studies of 2D MOFs materials development as electrochemical biosensor.
The recent trend on metal organic framework (MOF) studies has shifted to the development of MOFs with many metal nodes, also known as multi metallic MOF (MM-MOF). Many studies have shown that MM-MOF display much better performance compared to single metallic MOFs. In addition, derived MM-MOF products such as metal hybrids, MM-MOF composites, and MOF-on-MOF also provide interesting unique characteristics. In this review, we summarize the synthesis strategy of MM-MOF and their derivates in three different approaches, including one-pot synthesis/direct mixing, post-synthesis modification, and MOFs derivative preparation. In many applications, such as cancer markers detection, diabetic disease detection, metabolic disease detection, infectious disease detection, and toxic pollutant detection, MM-MOF based biosensors displayed excellent sensing performance as well as stability, selectivity, and reproducibility. This review provides a point of view on the recent development, preparation, and application of MM-MOF including the challenge and future prospect of this material.
In this work, a metal-organic framework (MOF) based on cobalt was decorated with graphene and used as a sensing material for glucose determination with electrochemical principles. The selection of Co-MOF material is based on its porous nature, large surface area, and excellent electrochemical properties. The combination of Co-MOF with graphene (high conductivity) effectively increased the electrochemical sensor current. The fabricated composite owned the good crystallinity with graphene particles attached to the Co-MOF surface. The biosensing performance was evaluated by cyclic voltammetry (CV) with 0.1 M NaOH solution as the bolstering electrolyte. The electrochemical measurement indicated that the prepared materials possessed a well-moved transfer electron between the electrode surface and electrolyte solution. The Co-BDC-3Gr sample obtained the best electrochemical performance with the lowest limit of detection (LOD) of 5.39 μM and the highest sensitivity of 100.49 μA mM-1 cm-2. The selectivity test of the modified Co-MOF was done by comparing the response with other compounds such as dopamine, uric acid, and NaCl. The acquired biosensor had excellent stability, with 93% of the initial response after 30 days of storage.
This study reports on an enzymatic glucose sensor based on mesoporous TiO2 nanoparticles (MTNPs) synthesized by a simple solvothermal method. The unique structure of MTNPs with a fairly homogenous shape, porous, and high crystallinity is the consequence of the use of PVP yang during the synthesis process. PVP plays an important role in creating the uniform morphology and mesoporous structure of MTNPs-2. The success of glucose oxidase immobilization on the surface of MTNPs was proven by FTIR and UV–vis characterizations. The prepared GCE/MTNPs-2/GOx electrode successfully detects glucose molecules with good sensing performance with a sensitivity of 0.4098 μA mM−1 cm−2, a wide linear range of 0.1–1 mM, and a relatively low detection limit of 73 μM.
Bontolempangan District is one of the districts included in the spatial planning area of the Gowa Regency. The development of tourism potential and agricultural land resources is a major part of the Gowa Regency spatial plan (RTRW 2012-2032). Therefore, this research investigates the potential of agricultural commodities and the carrying capacity of their land so that they can be used as a reference to become an agricultural-based tourism area. The agricultural potential was analyzed using the location quotient (LQ) and dynamic location quotient (DLQ) methods, while the carrying capacity of agricultural land was analyzed using land suitability analysis. From the LQ and DLQ analysis, robusta coffee, cocoa, cashew, candlenut, and arabica coffee are the leading agricultural commodities. Based on the land suitability analysis, the carrying capacity of the land for superior agricultural commodities is categorized into themoderate suitable level (S2) with an area of 2968.22 ha for Robusta coffee, 1202.30 ha of cocholate, 2227.22 ha of cashew nuts, 2253.47 ha of candlenut, 3235.91 ha of Arabica coffee ha, and sweet potatoes covering an area of 952.78 ha. Thus, leading agricultural commodities can be developed into agricultural-based tourism areas or agro-tourism.
Tujuan dari pelaksanaan kegiatan pengabdian ini adalah untuk meningkatkan pendapatan UMKM di kelurahan Tembesi dengan melakukan pendampingan dan penyuluhan tentang metode pemasaran pada masa pandemi Covid-19. Metode yang digunakan adalah dengan melakukan pengecekan langsung masalah yang dihadapi oleh pelaku UMKM. Mitra dari kegiatan pengabdian masyarakat adalah enam pelaku UMKM di Kelurahan Tembesi yaitu Es campur, Distera taylor, tempe mendoan, warung makan, empek-empek, rujak. Pendapatan dari para mitra pelaku UMKM terpengaruh oleh pandemi Covid-19. Semua pelaku belum melakukan promosi dengan media sosial, sedangkan di masa pandemi Covid-19 mayoritas masyarakat mengurangi kegiatan diluar dan melakukan pembelian secara online. Pelaku UMKM yang bergerak dibidang makanan dan minuman, mayoritas belum memperhatikan kemasan dan tidak menggunakan label sebagai identitas dari pelaku UMKM. Dalam proses pendampingan dan penyuluhan mayoritas pelaku UMKM mengikuti arahan dari pelaku pengabdian masyarakat, meskipun ada 2 pelaku UMKM yang tidak bersedia menerapkan promosi dengan media sosial yaitu UMKM tempe mendoan dan rujak. Secara keseluruhan, pelaksanaan pengabdian masyarakat memberikan perubahan positif terhadap pendapatan pelaku UMKM.
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