Ionic Equilibria in Analytical Chemistry

Burgot, Jean‐Louis

doi:10.1007/978-1-4419-8382-4

Cited by 74 publications

(69 citation statements)

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“…~ 6.6 mA cm -2 ) such that the solution changes color from yellow to red. This now locally generates a solution which is at pH ≤ 4.2 38 .…”

Section: Ph Generation: Preparation Of Ph Sensitive Electrode and Ph mentioning

confidence: 99%

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Assessment of Boron Doped Diamond Electrode Quality and Application to <em>In Situ</em> Modification of Local pH by Water Electrolysis

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Macpherson²

2016

JoVE

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Boron doped diamond (BDD) electrodes have shown considerable promise as an electrode material where many of their reported properties such as extended solvent window, low background currents, corrosion resistance, etc., arise from the catalytically inert nature of the surface. However, if during the growth process, non-diamond-carbon (NDC) becomes incorporated into the electrode matrix, the electrochemical properties will change as the surface becomes more catalytically active. As such it is important that the electrochemist is aware of the quality and resulting key electrochemical properties of the BDD electrode prior to use. This paper describes a series of characterization steps, including Raman microscopy, capacitance, solvent window and redox electrochemistry, to ascertain whether the BDD electrode contains negligible NDC i.e. negligible sp 2 carbon. One application is highlighted which takes advantage of the catalytically inert and corrosion resistant nature of an NDC-free surface i.e. stable and quantifiable local proton and hydroxide production due to water electrolysis at a BDD electrode. An approach to measuring the local pH change induced by water electrolysis using iridium oxide coated BDD electrodes is also described in detail. Video LinkThe video component of this article can be found at

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“…~ 6.6 mA cm -2 ) such that the solution changes color from yellow to red. This now locally generates a solution which is at pH ≤ 4.2 38 .…”

Section: Ph Generation: Preparation Of Ph Sensitive Electrode and Ph mentioning

confidence: 99%

“…was applied to a 1 mm diameter glass sealed BDD macroelectrode. The pink color indicates pH≥10.5, colorless solution indicates pH≤8.4 38 . Please click here to view a larger version of this figure.…”

Section: +mentioning

confidence: 99%

Assessment of Boron Doped Diamond Electrode Quality and Application to <em>In Situ</em> Modification of Local pH by Water Electrolysis

Read¹,

Macpherson²

2016

JoVE

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“…According to literature, lanthanides easily form acetic [21][22][23][24][25][26] and hydroxo complexes, [27] and their equilibrium constants are summarized in Table 4. The coefficients of competing reactions have been calculated using Equation (2) and (3) [28] …”

Section: Complex Formationmentioning

confidence: 99%

Aqueous Complexation of Y^III, La^III, Nd^III, Sm^III, Eu^III, and Yb^III with Some Heterocyclic Substituted β‐Diketones

2015

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This paper deals with spectrophotometric investigation on complexation of Y III , La III , Nd III , Sm III , Eu III , and Yb III metal ions with six heterocyclic substituted β-diketones. The stability constants of 36 monocomplex species was determined in aqueous solutions at 298 K and I = 0.25; it lay in the range from 5.14 to 9.76 logarithmic units. The influence of the natures of the metal and ligand on the stability constant along

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“…Campuran tersebut kemudian disinari dengan sinar UV selama 2 jam disertai dengan pengadukan di dalam reaktor dimana setiap 30 menit sebanyak 10 mL cairan diambil dari campuran yang ada di dalam tabung kuarsa untuk kemudian dianalisis kadar As(III) di dalam larutan dengan metode titrasi permanganometri menggunakan larutan standar sekunder kalium permanganat (KMnO4) 0,08 M yang sebelumnya distandardisasi dengan larutan standar primer natrium oksalat (Na2C2O4) 0,1 M. Reaksi yang terjadi antara As(III) dengan KMnO4 dapat dilihat pada persamaan (1). ……(1) (Burgot, 2012).…”

Section: Fotokatalisis Dan Titrasi As(iii)unclassified

Perbandingan Nanokristal Titanium Dioksida Metode Hidrotermal dengan P25 Degussa untuk Uji Fotokatalitik Arsenik

Aldelina

2017

JPKim

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Abstrak: Arsenik merupakan salah satu dari 10 bahan kimia yang berbahaya terhadap kesehatan manusia menurut WHO. Arsenik yang berbahaya terhadap kesehatan manusia ini umumnya berada dalam bentuk senyawa anorganik dengan bilangan oksidasi 3 (As(III)). Salah satu metode yang paling dikenal untuk meremediasi As(III) adalah metode oksidasi. Titanium dioksida (TiO2) dapat digunakan sebagai fotokatalis untuk mengoksidasi As(III). Aktivitas fotokatalitik dari TiO2 sangat bergantung pada ukuran dan komposisi fase kristalnya. Ukuran kristal TiO2 yang lebih kecil dapat diperoleh dengan metode hidrotermal. Penelitian ini bertujuan untuk membandingkan fotoaktivitas TiO2 hasil sintesis dengan P25 Degussa terhadap penurunan kadar As(III). Bahan yang digunakan sebagai prekursor yaitu TiCl4 serta pelarut H2SO4 dan t-butanol. Struktur kristal TiO2 hasil sintesis yaitu campuran anatase dan rutil dengan komposisi anatase lebih besar dibandingkan rutil. Ukuran kristal TiO2 hasil penghitungan menggunakan persamaan scherrer menunjukkan ukuran kristal kurang dari 60 nm. Kemampuan TiO2 hasil sintesis dengan menggunakan H2SO4 2,0 M menurunkan kadar As(III) sebesar 72% melebihi kemampuan P25 Degussa yang menurunkan kadar As(III) sebesar 35%. Kata kunci: As(III), hidrotermal, fotoaktivitas TiO2, H2SO4, t-butanol Abstract: Arsenic is one of 10 chemicals which is harmful to human health, according to WHO. Arsenic that harmful to human health is generally in the form of inorganic compounds with oxidation number of 3 (As(III)). One of the best known method to remediate As(III) is an oxidation method. Titanium dioxide (TiO2) can be used as a photocatalyst to oxidize As(III). The photocatalytic activity of TiO2 is highly dependent on the size and composition

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Ionic Equilibria in Analytical Chemistry

Cited by 74 publications

References 0 publications

Assessment of Boron Doped Diamond Electrode Quality and Application to <em>In Situ</em> Modification of Local pH by Water Electrolysis

Assessment of Boron Doped Diamond Electrode Quality and Application to <em>In Situ</em> Modification of Local pH by Water Electrolysis

Aqueous Complexation of Y^III, La^III, Nd^III, Sm^III, Eu^III, and Yb^III with Some Heterocyclic Substituted β‐Diketones

Perbandingan Nanokristal Titanium Dioksida Metode Hidrotermal dengan P25 Degussa untuk Uji Fotokatalitik Arsenik

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Ionic Equilibria in Analytical Chemistry

Cited by 74 publications

References 0 publications

Assessment of Boron Doped Diamond Electrode Quality and Application to <em>In Situ</em> Modification of Local pH by Water Electrolysis

Assessment of Boron Doped Diamond Electrode Quality and Application to <em>In Situ</em> Modification of Local pH by Water Electrolysis

Aqueous Complexation of YIII, LaIII, NdIII, SmIII, EuIII, and YbIII with Some Heterocyclic Substituted β‐Diketones

Perbandingan Nanokristal Titanium Dioksida Metode Hidrotermal dengan P25 Degussa untuk Uji Fotokatalitik Arsenik

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About

Aqueous Complexation of Y^III, La^III, Nd^III, Sm^III, Eu^III, and Yb^III with Some Heterocyclic Substituted β‐Diketones